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Storm Drainage
Technica/ Information
Report
PREPARED fOR :
Tarragon, LLC
1000 2"d Avenue, Suite 3200
Seattle, WA 98104-1074
(206) 233-9600
Contact: Murphy McCullough
PROJECT.'
Cedar River Corporate Park
, 206200.10
PREPARED BY.'
, Charles "Ted" Hill, E.I.T.
Pro�ect Engineer
Matt Budsberg
Project Engineer
REVIEWED BY.�
Connie Linden, P.E.
Project Manager
Paul B. McCormick, P.E., S.E.
Principal ,
December 2006
Revised May 2007 �3383
Ci✓rl Engineers • Struct��ral Engineers • Landscape Architects • Communrty Planners • Land Surveyors • Neighbors
\
� ,
Storm Drainage
Technica/Information
Report
PREPARED POR :
%
Tarragon, LLC
1000 2"d Avenue, Suite 3200 I
� , Seattie, WA 98104-1074 �I
A � (206) 233-9600 �,I
�� . Contact: Murphy McCullough
� _ -�,�
`��.•t .,��y�
�'�'` ��GISIF�9 PROJECT.�
��<�.
Cedar River Corporate Park
������ 206200.10
PREPARED BY:
I hereby state that this Storm
Drainage Technical Information Charles ��Ted�� HI��, E.I.T.
Report for Cedar River Corporate Park
has been prepared by me or under my Project Engineer
supervision and meets the standard of
care and expertise that is usual and Matt Budsberg
customary in this community for Pro ect En ineer
professional engineers. I understand � g
that the City of Renton does not and
will not assume liability for the REVIEWED BY.•
sufficiency, suitability, or performance
of drainage facilities prepared by me.
Connie Linden, P.E.
Project Manager
Paul B. McCormick, P.E., S.E.
Principal
December 2006
Revised May 2007
�'33�
1.O PRO7ECT OVERVIEW
1.1 Purpose and Scope
This report accompanies the civil engineering site development submittal, which includes
proposed grading, drainage, and utilities development for the proposed Cedar River
Corporate Park project, located on Lind Avenue between SW 21st Street and SW 23rd
Street, Renton, Washington, Parcel Number 3340400285, Development includes on-site
construction of four office/light industrial buildings totaling 143,307 square feet, parking
lots, storm detention pond, two bioswales, 12-inch to 30-inch CPEP conveyance system, a
10-inch watermain extension loop through the site, an 8-inch sanitary main, 6-inch
building side sewers, and landscaping. Off-site improvements include constructing
cement concrete sidewalk at the existing curb and gutter, and landscaping.
Wetlands border the northern, southern, and eastern property lines of the project site.
The western site boundary is bordered by Lind Avenue. The southern and eastern
' wetlands are hydraulically connected. The northern wetland is classified by the City of
Renton as a Category 2 wetland, requiring a 50-foot buffer, and the southern/eastern
wetland is classified by the City as a Category 3 wetland, requiring a 25-foot buffer. To
maintain existing site hydrology, treated drainage, which will first be control released
from the proposed detention pond facility, will be released to the wetlands via bioswales.
The bioswales are proposed to be constructed within the wetland buffers. Construction
of stormwater facilities, namely the proposed bioswales, is allowed under the City of
Renton Municipal Code, Section 4-3-050, Critical Areas Regulations. A portion of roof
� runoff will be directed to a constructed rain garden within the north wetland buffer. A
i wetland mitigation plan has been prepared by Wetland Biologist Celeste Botha with WPS,
dated April 16, 2007.
This Technical Information Report (TIR) and site development plans are submitted to the
City of Renton for review and approval. The storm drainage system proposed for the site
is designed in conformance to the Z005 King County Surface Water Design Manual
(KCSWDM).
1.2 Existing Conditions
The project site consists of approximately 12.5 acres, which is a roughly rectangular
shaped site, located between SW 2151 Street and SW 23`d Street along Lind Avenue in the
City of Renton, King County, Washington. See the site Vicinity Map provided at the end
of this section. The subject property is bound to the north by a Category 2 wetland and
the SW 215` Street Right-of-Way, to the south and to the east by a Category 3 wetland,
and to the west by Lind Avenue.
In the existing condition, the site is undeveloped. There is trash, debris, and an
abandoned vehicle on the site, which will be removed with site development. The site
has been disturbed by previous fill activity. The Geotechnical Report prepared for the
site by Terra Associates, Inc. (see Section 6, Specia/Reports), dated December 7, 2006,
and provided in Section 6 of this report states that the site was filled in the late 1960s
with a silty sand and sandy silt fill material, mixed with fractured bedrock.
The site consists of a relatively flat topography, with an elevation low along the eastern
pan-handle of approximately 16 feet, and an elevation high of approximately 22 feet
along the western property boundary. Site vegetation consists of small diameter Alder
and Cottonwood trees, sparse grass, blackberry bushes, and underbrush.
1 O� � O
Z.O CONDITIONS AND REQUIREMENTS SUMMARY
The stormwater system proposed for the project is subject to the City of Renton's
requirement to meet the Z005 KCSWOM. Core requirements are met by the proposed
stormwater facilities. These facilities are further discussed in this Section and in
Section 4 of this TIR, No special requirements are applicable to this project.
2.1 Pond
Site drainage will sheet flow to proposed catchbasins and will then be conveyed via a
CPEP/. PVC closed conveyance system to a detention pond located at the northeastern
corner of the site. The proposed detention pond is sized using Level II criteria in ,
accordance with the KCSWOM. In the existing condition, the site is divided into two i
drainage basins that drain to a Category 2 wetland to the north and a Category 3 wetland
to the southeast. This drainage pattern will be maintained in the developed condition.
Discharge from the proposed detention pond is regulated via two control manholes used
to convey discharge to two separate bioswales. These bioswales will treat and convey
drainage to the northern and southeastern wetlands. See Section 4 of this TIR for
bioswale design.
2.2 Rain Garden
The proposed rain garden is sized using the requirements set forth in Appendix C of the
KCSWDM. Drainage from a portion of proposed building B will be directed to the rain
garden. See the landscape plans, submitted with the Civil Site Development plan set, for
required plantings within the rain garden. See Section 4 of this TIR for rain garden
sizing.
2.3 Wetlands
Wetlands border the property along the northern, southern, and eastern property
boundaries. The southern and eastern wetlands are hydraulically connected, with
overflow drainage flowing to the south to Springbrook Creek, and are classified by the
City of Renton as Category 3 wetlands. The northern wetland is a Category 2 wetland,
as classified by the City Renton. Overflow drainage from this northern wetland is
collected via an existing pipe, constructed by the City of Renton, which is connected to
the SW 19`h Street storm closed conveyance system. These wetlands will be protected
during construction activities via filter fabric fencing, interceptor swales, and sediment
ponds to collect drainage and provide sediment protection. Some grading is proposed
� within the wetland buffers, as discussed with City staff (Ron Straka), to construct
bioswales proposed as treatment facilities for stormwater discharges from the proposed
detention pond facilities control manholes. Note, however, that the City of Renton
Municipal Code (see Section 4-3-050C) allows construction of stormwater management
facilities within wetland buffers. Minor grading will also be done with the wetland
buffers. A Wetland Mitigation Plan, provided in Section 6 of this Report is provided to
mitigate grading impacts.
2.4 Frontage Improvements
Proposed frontage improvements consist of constructing two driveway approaches for the
site, one located at the northwestern corner of the site and the second at the
southwestern corner of the site, and constructing a cement concrete sidewalk along the
Lind Avenue frontage, including ADA ramps. Frontage landscaping will also be provided
� Oa � O
3.0 OFF-SITE ANALYSIS
3.1 Downstream Descriptions
The site is within the Springbrook drainage basin. A Level 1 Downstream Analysis has
been completed and can be found on the following pages. In general, site drainage
sheet flows to wetlands located along the northern, southern, and eastern property
boundaries. Drainage is conveyed from the wetlands via ditches and closed conveyance
systems to Springbrook Creek. See the following pages in this section for the
Downstream Map and Off-Site Analysis Drainage System Table.
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Symbol Drainage Drainage Slope Distance Existing Potential Observations of field
Component Type, Component from site Problems Problems inspector, resource
Name and Size Descri tion dischar e reviewer, or resident
see map Type: sheet flow, swalt�, � drainage basin,vegetation, %• '-:ml= 1,320 ft ronstrictions,under capacity;pondiny, tributary area,likelihood of problem,
stream,channel, pipe, cover,depth,type of sensiUve overtopping,flooding,habitat or orGani>m overflow pa(hways, potential impacts
pond;Size:diameter, area,volwT�e destn;r.tion,sr,ouring, bank sloughiny,
surface area sedirientation,inr.ision,other erosion
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4.O FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN ',
Flow control will be provided for the site by a detention pond facility. Discharge from the �i
pond will be controlled via two control structures discharging to bioswales for treatment, ,
prior to outletting to the northern and southeastem wetlands. The proposed detention I
pond facility was designed using a continuous model, specifically, the King County KCRTS �i
software package. Per discussions with the City of Renton staff, a Level 2 analysis
methodology was used. In general, a Level 2 flow control facility is designed to control
durations of significant flows, and thereby, maintain existing channel and stream-bank I
erosion rates. Specifically, Level 2 flow control facilities maintain the duration of high I
flows at their pre-development levels for all flows greater than half of the 2-year peak
flow, up to the 50-year peak flow.
Site drainage first sheet flows to catch basins and is then conveyed via a CPEP (smooth
walled) closed conveyance system to a detention pond. The inlet pipe is located such
that a 3:1 ratio is provided between the inlet and outlet pipes via an ecology block berm.
To provide the required pond volume and to allow gravity drainage to outfall points
(northern and southeastern wetlands) ecology block retaining walls are proposed at the
pond perimeter. Proposed wall design is provided by Terra Associates, dated May 3,
2007 and is provided in Section 6 of this report. A summary of the drainage areas and a
table showing the control structure design and orifice sizing follows.
Site = 12.5 acres
• 9.7 acres drain to the south = 77 %
• 2.9 acres drain to the north = 23%
(NOTE: Approximately 0.54 acre of the site will not be disturbed. This acreage
consists of wetland buffer and wetlands, located along the northern, southern,
and eastern property lines.)
The area ratio �isted above was used to determine the tributary area and storm drainage
flow to the north and to the south. Flow control design is summarized below, and the
flow control calculations are provided at the end of this section.
4.1 Flow Control Design
Separate control manhole structures will be provided at the proposed detention pond
facility to route drainage to the northern and Southern/Eastern drainage basins to
maintain existing hydrology of the Category 2 Wetland to the north and the Category 3
Wetland to the south and to the east of the site. A sizing table is provided below, which
summarizes orifice sizing. Flow control and orifice sizing calculations using a stage/
discharge spreadsheet are provided at the end of this Section.
Flow Control Orifice Design Summary Table
Design Orifice North South
1. 1.63" 0.5" (1/2") 1.53" (1 1/2)
2. 2.75" 1.48" (1 1/2") �.33" (2 5/16")
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Existing Land Use Summary
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Area _ ?
Till For�st 11•92 acres
TiN Pasture 0.00 acres;
Till Grass 0.00 acres
Outwash Forest' 0.00 acres
Ouiwash Pastufe D.OD acres'
Ouiwash Grass 0.00 acres
Wetland' O.OU acres
Impervious; �.00 acres
;-Tatal ___ -
11.92 acres
Scale Factor : 1.00 Hou� Reduced
Time Series: exis� »�
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File for computed Time Series [.TSFJ
Cedar River Corporate Park
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Till Pasture; 0.32 acres
Till Grass 1 .86 �cres
{ Outwash Forest O.QO acr�s
Outw�sh Pasture` �.00 acr��
� Outwash Grass' 0.00 ��res`
>; �r'��tland` 0.0� acre�; '
Impervious 9.0� acres
Tota I
11 .�� acres'
; S�ale Fac�tor : � .00 Haurly R�du�ed
Time Serie�: dev >�$
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File for computed Time �eries [.TSF]
FCOron C301uie 11 h��J�m FndaV.ti._SN7 4N.'w r JS(Jli
Flow Frequency Cedar River Corporate Park
;
Flow Frequency Analysis
---------------------------------------------------------
� Time 5eries File : exist . tsf
Project Location : 5ea-Tac
� ---Annua 1 Peak F 1 o�a Ra t es--- -----F 10� Frequenc� Ana 1 y�i s------- F�KS�f� �N T��.
� Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob "�
� (CFS) (CFS) Per i od �`l° - 2`!i^
0 . 752 2 2/D9�01 18 : 00 0 . 962 1 100 . 00 0 . 990 ._ .
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� 0 . 20� 7 1•'06•'02 3 : 00 0 . 752 � 25 . QO 0 . 960
0 . 557 4 2i28•`03 3 : 00 0 . 577 3 10 . 00 0 . 900 = O.►�`>>
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0 . 02D 8 3�24.�04 20 : 00 0 . 557 4 5 . 00 0 . 800
;�� 0 . 331 6 1�'"05r"05 8 : 00 D . 487 5 3 . 00 0 . 667
` � . 577 3 1�18�06 21 : 00 0 . 331 6 2 . 00 0 . 500
s
� D . 48� 5 11/24r'06 4 : 00 0 . �04 7 1 . 30 0 . 231
� 0 . 962 1 1�'09�08 9 : 00 0 . 020 B 1 . 10 0 . 091
�Computed Peaks 0 . 892 50 . 00 0 . 98Q
+ Flo�* Frequency Analysis �l�i�c�AL 5i�_�
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: --------------------------------------------------------
� Time Series File : dew . tsf �1!/'' �r'"�{ S�+_
= Project Location : Sea-Tac � i
� ---Annual Peak Flow Rat�s--- -----Flo� Frequency Analy�is-------
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�` 2 . 40 6 2�'D'��'01 2 : 00 �4 . 75 1 100 . 00 0 . 9'90 `�"
f
2 . �3 8 1�'05�'02 16 : 00 3 . 33 2 25 . 00 0 . 960 _ �. ��,`�
�a 2 . 8b 3 12�'08�'0� 18 : 00 2 . 86 3 10 . 00 0 . 900
;
2 . 28 7 8/26/�4 2 : 00 2 . 72 4 5 . 00 0 . 800
` � . 72 4 10.�28✓'04 16 : 00 2 . 56 5 3 . 00 0 . 667
� . 56 5 1.�18�06 16 : 00 � . 40 �6 2 . 00 0 . 500
3 . 33 2 10✓'26.�06 0 : 00 2 . �8 7 1 . 30 a . �31
4 . 75 1 1�`09�08 6 : OQ � . 03 8 1 . 10 0 . 091
fiComputed Peaks 4 . �7 50 . 00 0 . 9B0
Rrzqion G2Dlure. 11.S�p2am-Fntlav.�'=�7.6 f3w s 495h
Retention/Detention Facility
Type of Facility: Detention Pond
Side Slope: 0. 00 H:1V
Pond Bottom Length: 340. 00 ft
Pond Bottom Width: 55.00 ft
Pond Bottom Area: 18700 . sq. ft
To Area at 1 ft. FB: 18700 . s . ft
P q
0.429 acres
Effective Storage Depth: 8 . 90 ft
Stage 0 Elevation: 14 .25 ft
Storage Volume: 166430. cu. ft �1
3 .821 ac-ft
Riser Head: 8.90 ft
Riser Diameter: 18.00 inches
Number of orifices: 2
Full Head Pipe
Orifice # Height Diameter Discharge Diameter
(ft) {in) (CFS) (in)
1 0.00 1.63 0 .215
2 5.30 2 .75 0.389 6.0
Top Notch Weir: None
Outflow Rating Curve: None
Stage Elevation Storage Discharge Percolation Surf Area
(ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) (sq. ft)
0 . 00 14 .25 0. 0 .000 0.000 0.00 18700.
0 .02 14 .27 374 . 0.009 0 .009 0. 00 18700.
0 .03 14 .28 561. 0.013 0.013 0.00 18700.
0. 05 14 .30 935. 0.021 0.016 0. 00 18700. I
0. 07 14.32 1309. 0.030 0. 019 0.00 18700. ,
0 .08 14 .33 1496. 0.034 0.021 0 .00 18700. ''
0. 10 14 .35 1870. 0. 043 0.023 0 .00 18700.
0.12 14 .37 2244 . 0.052 0 .025 0 .00 18700 .
0.14 14 .39 2618. 0 .060 0. 027 0.00 18700 .
0 .29 14 .54 5423. 0.124 0.039 0.00 18700.
0 .44 14 .69 8228. 0.189 0.048 0.00 18700.
0 .59 14 .64 11033. 0 .253 0.055 0.00 18700 .
0_74 14 .99 13838. 0.318 0.062 0.00 18700.
0. 89 15. 14 16643 . 0.382 0 .068 0.00 18700.
1. 04 15.29 19448. 0.446 0 .074 0.00 18700.
1. 19 15.44 22253. 0.511 0 . 079 0.00 18700.
1.34 15 .59 25058 . 0.575 0. 084 0.00 18700.
1.49 15.74 27863. 0.640 0.088 0.00 18700 .
1.64 15.89 30668. 0.704 0.092 0 .00 18700 .
1 . 80 16.05 33660. 0.773 0.097 0.00 18700 .
1. 95 16.20 36465. 0 .837 0.101 0 .00 18700 .
2 . 10 16.35 39270. 0 .902 0.104 0.00 16700 .
2 .25 16.50 42075. 0.966 0 .108 0. 00 18700 .
2 .40 16.65 44880. 1.030 0 .112 0. 00 18700.
2 .55 16.80 47685. 1.095 0. 115 0. 00 18700 .
2 .70 16 .95 50490. 1.159 0. 118 0 . 00 18700 .
2 .85 17 . 10 53295. 1.223 0.122 0 . 00 18700 .
3 . 00 17 .25 56100. 1 .288 C . 125 0 . 00 18?C0 .
3 . 15 17 .40 58905 . i.352 0 . 128 O . CO 1B%OG.
3 .30 17.55 61710. 1.417 0. 131 0 . 00 18700 .
3 .45 17.70 64515 . 1.481 0. 134 0 . 00 1870C .
3 .61 17.86 67507 . 1. 550 0. 137 0 .00 1870C .
3 .76 18. 01 70312 . 1. 614 0_ 140 0 . 00 18700 .
3 .91 18. 16 73117. 1.679 0 . 142 0 . 00 18700 .
4 .06 18.31 75922 . 1.743 0 . 145 0. 00 18700 .
4 .21 18.46 78727 . 1.807 0 .148 0 . 00 18700 .
4 .36 18 .61 81532 . 1.872 0. 150 0. 00 18700 .
4 .51 18 .76 84337 . 1.936 0. 153 0. 00 18700 .
4 .66 18 . 91 87142 . 2 .001 0.156 0.00 18700 .
4 .81 19.06 89947. 2 .065 0. 158 0. 00 18700 .
4 .96 19.21 92752 . 2 .129 0. 161 0. 00 18700 .
5.11 19.36 95557 . 2 .194 0.163 0. 00 18700 .
5 .26 19.51 96362 . 2.258 0. 165 0. 00 18700 .
5.30 19.55 99110. 2.275 0.166 0 .00 18700 .
5 .33 19.58 99671. 2 .288 0.168 0 . 00 18700 .
5 .36 19.61 100232 . 2 .301 0. 174 0 . 00 18700 .
5 .39 19.64 100793 . 2 .314 0. 185 0. 00 18700 .
5.41 19.66 101167. 2 .322 0. 198 0. 00 18700 .
5.44 19.69 101728. 2 .335 0 .215 0.00 18700 .
5.47 19.72 102289. 2 .348 0 .235 0 . 00 18700 .
5.50 19.75 102850. 2 .361 0 .259 0 . 00 18700 .
5 .53 19.78 103411. 2 .374 0.268 0 . 00 18700.
5.68 19.93 106216 . 2 .438 0.298 0.00 18700 .
5 .83 20.08 109021. 2 .503 0.323 0 . 00 18700 .
5 .98 20.23 111826. 2 .567 0 .346 0 . 00 18700 .
6.13 20.38 114631. 2 .632 0 .366 0. 00 18700 .
6.28 20. 53 117436. 2 .696 0.384 0. 00 18700 .
6.43 20.68 120241. 2 .760 0.401 0 . 00 18700 .
6.59 20 . 64 123233 . 2 .829 0.417 0. 00 18700.
6.74 20 . 99 126038 . 2 .893 0 .433 0. 00 18700.
6.89 21.14 128843 . 2 .958 0.448 0 . 00 18700 .
7 .04 21.29 131648 . 3 .022 0.462 0. 00 18700 .
7. 19 21.44 134453 . 3 .087 0.475 0. 00 18700 .
7.34 21.59 137258. 3.151 0 .488 0. 00 18700 .
7.49 21.74 140063 . 3 .215 0 .501 0. 00 18700 .
7 .64 21.89 142868. 3 .280 0.513 0. 00 18700 .
7.79 22.04 145673 . 3 .344 0.525 0. 00 18700 .
7. 94 22.19 148478 . 3 .409 0.537 0.00 18700 .
8 . 09 22 .34 151283 . 3 .473 0.548 0 . 00 18700 .
8 .24 22 .49 154088. 3 .537 0 .559 0. 00 18700 .
8 .40 22 . 65 157080. 3 .606 0 .570 0.00 18700 .
8.55 22 . 80 159885. 3 .670 0 .580 0 .00 18700 .
8.70 22.95 162690 . 3 .735 0.591 0 . 00 18700 .
8.85 23 .10 165495 . 3 .799 0. 601 0 . 00 18700 .
8 . 90 23 . 15 166430 . 3 .821 0.604 0. 00 18700 .
9.00 23 .25 168300. 3 .864 1.070 0. 00 18700 .
9.10 23 .35 170170. 3 .907 1.920 0 .00 18700 .
9.20 23 .45 172040. 3 .949 3 .020 0 .00 18700 .
9.30 23 .55 173910. 3 .992 4.330 0 . 00 18700 .
9.40 23 .65 175780. 4 .035 5. 800 0 . 00 18700 .
9.50 23 .75 177650 . 4 .078 7.230 0. 00 18700 .
9.60 23 .85 179520. 4 .121 7.770 0. 00 18700 .
9.70 23 .95 181390. 4 .164 8.270 0.00 18700 .
9. 80 24.05 183260. 4 .207 8.730 0 . 00 18700 .
9. 90 24 . 15 185130 . 4 .250 9. 180 0 . 00 18700 .
10. 00 24 .25 187000. 4 .293 9.600 0 . 00 18700 .
10. 10 24 .35 188870. 4 .336 10. 000 0. 00 18700 .
10.20 24 .45 190740 . 4 . 379 10.390 0. 00 18700 .
10.30 24 .55 192610 . 4 .422 10.760 0. 00 18700.
10.40 24 .65 194480 . 4 .465 11.120 0.00 18700.
10. 50 24 .75 196350. 4 .508 11.470 0 .00 18700.
10.60 24 . 85 199220. 4.551 11.800 0.00 18700.
10.70 24 . 95 200090. 4 .593 12 . 130 0. 00 18700.
10. 80 25 .05 201960. 4 .636 12 .450 0. 00 18700.
Hyd Inflow Outflow Peak Storage
Target Calc Stage Elev (Cu-Ft) (Ac-Ft)
1 4.75 ******* 1.84 9. 09 23 .34 169996 . 3 .903
2 2 .40 0.75 0.58 8.58 22 . 83 160353 . 3 .681
3 2 .44 ******* 0.51 7.56 21.81 141334 . 3 .245
4 2 . 86 ******* 0.50 7.49 21.74 139974 . 3 .213
5 2 .56 ******* 0 .37 6. 14 20 .39 114887 . 2 .637
6 1.53 ******* 0.17 5 .27 19.52 98521. 2 .262
7 2 . 03 ******* 0.16 4 .91 19.16 91876. 2 .109
B 2 .28 ******* 0.14 3 .72 17. 97 69572 . 1.597
----------------------------------
Route Time Series through Facility
Inflow Time Series File:dev.tsf
Outflow Time Series File:rdout
Inflow/Outflow Analysis I
Peak Inflow Discharge: 4 .75 CFS at 6:00 on Jan 9 in Year 8 I�
Peak Outflow Discharge: 1. 84 CFS at 10:00 on Jan 9 in Year 8 �
Peak Reservoir Stage: 9. 09 Ft
Peak Reservoir Elev: 23 .34 Ft
Peak Reservoir Storage: 169996. Cu-Ft
. 3 .903 Ac-Ft
Flow Frequency Analysis
Time Series File:rdout.tsf
Project Location:Sea-Tac
---Annual Peak Flow Rates--- -----Flow Frequency Analysis-------
Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob
(CFS) (CFS) (ft) Period
0 .598 2 2/09/O1 20:00 1.84 9.09 1 100 . 00 0. 990
0.162 7 1/07/02 3 :00 0.598 8. 80 2 25.00 0.960
0.502 4 3/06/03 22 :00 0 .506 7.56 3 10.00 0. 900
0.139 8 S/26/04 7 :00 0.502 7.51 4 5.00 0.8C0
0. 165 6 1/08/05 4 :00 0.369 6.15 5 3 .00 0.6E?
0.369 5 1/18/06 23 :00 0 .165 5.27 6 2 . 00 0.5G�
0.506 3 11/24/06 8:00 0 .162 5.00 7 1 .30 0.231
1. 84 1 1/09/OS 10:00 0 .139 3 .72 8 1. 10 0. 091
Computed Peaks 1.43 9.04 50 . 00 0. 980
Flow Duration from Time Series File:rdout.tsf
Cutoff Count Frequency CDF Exceedence_Probabilit.•;
CFS $ � �
0.009 28268 46.099 46.099 53 . 901 0.539E+00
0 .025 5368 8 .754 54 .853 45 .147 0.451E+OC
0 .042 5665 9.238 64 . 092 35 . 908 0 .359E+OC
0. 059 5i29 8 .527 7� . 615 2i .381 O.Zi4E+00
0.076 4585 7.477 80.096 19. 904 0.199E+00
0.093 4065 6.629 86.725 13 .275 0.133E+00
0.109 3055 4 .982 91.707 8 .293 0. 829E-01
0. 126 1627 2 .653 94 .361 5 .639 0.564E-01
0. 143 1520 2 .479 96.840 3 . 160 0.316E-01
0. 160 1197 1.952 98 .792 1.208 0. 121E-01
0. 177 376 0.613 99.405 0.595 0.595E-02
0. 193 20 0.033 99.437 0.563 0.563E-02
0.210 12 0.020 99.457 0.543 0.543E-02
0.227 10 0.016 99.473 0.527 0. 527E-02
0.244 6 0.010 99.483 0.517 0.517E-02
0.261 8 0 .013 99.496 a.504 0.504E-02
0.277 38 0 .062 99.558 0.442 0.442E-02
0.294 26 0 .042 99. 600 0.400 0.400E-02
0.311 25 0 .041 99.641 0.359 0.359E-02
0.328 27 0.044 99.685 0.315 0.315E-02
0.345 18 0.029 99.715 0.285 0.285E-02
0.361 24 0.039 99.754 0.246 0.246E-02
0.378 21 0.034 99.788 0.212 0.212E-02
0 .395 14 0.023 99.811 0.189 0.189E-02
0 .412 10 0. 016 99.827 0.173 0.173E-02
0 .429 12 0.020 99.847 0.153 0.153E-02
0 .445 10 0.016 99.863 0.137 0.137E-02
0.462 12 0.020 99.883 0.117 0.117E-02
0 .479 13 0.021 99.904 0.096 0. 962E-03
0.496 11 0.018 99.922 0.078 0.783E-03
0.513 14 0 .023 99.945 0 .055 0.554E-03
0. 529 9 0 .015 99. 959 0.041 0.408E-03
0. 546 9 0 .015 99. 974 0.026 0.261E-03
0.563 4 0 .007 99. 980 0.020 0.196E-03
0.580 5 0.008 99. 989 0.011 0.114E-03
0.597 5 0.008 99. 99? 0 . 003 0 . 326E-04
Duration Comparison Anaylsis
Base File: exist.tsf
New File: rdout.tsf
Cutoff Units: Discharge in CFS
-----Fraction of Time----- ---------Check of Tolerance-------
Cutoff Base New �Change Probability Base New �Change
0.165 � 0.95E-02 0.68E-02 -29.0 � 0.95E-02 0.165 0. 162 -1 .8
0.210 � 0.63E-02 0.54E-02 -14 .0 � 0. 63E-02 0.210 0 .167 -20 . 5
0.255 � 0.50E-02 0.51E-02 2 .0 � 0.50E-02 0.255 0 .263 3 . 1
0.300 � 0.37E-02 0 .39E-02 4 .4 � 0.37E-02 0.300 0 .306 1. 9
0.346 � 0.28E-02 0 .28E-02 -1 .7 � 0.28E-02 0 .346 0 .345 -0 .2
0.391 � 0.22E-02 0.19E-02 -13 .2 � 0.22E-02 0.391 0 .370 -5 .4
0.436 I 0.15E-02 0.15E-02 0.0 � 0. 15E-02 0.436 0.436 0. 0
0.481 � O .10E-02 0.95E-03 -6.5 � O.10E-02 0.481 0.474 -1.5
0.526 I 0 .62E-03 0.42E-03 -31.6 � 0.62E-03 0.526 0.504 -4 .2
0.571 � 0 .34E-03 0.16E-03 -52 .4 � 0.34E-03 0.571 0 .537 -5. 9
0.616 I 0 .21E-03 O.00E+00 -100.0 I 0.21E-03 0.616 0.561 -8 .9
0.662 I 0.16E-03 O.00E+00 -100.0 I 0.16E-03 0 .662 0.573 -13 .4
0.707 � 0. 98E-04 O. 00E+00 -100 .0 � 0. 98E-04 0. 707 0 .587 -17 .0
0.752 � 0.16E-04 O. 00E+00 -100.0 � 0.16E-04 0. 752 0_597 -20 .5
Maximum positive excursion = 0. O11 cfs { 4 .2�) t �(i!� `I�� /
occurring at 0.258 cfs on the Base Data:exist.tsf •--"-`" � `
and at 0 .269 cfs on the New Data:rdout.tsf
P�iaximum negative excursion = 0.046 cfs (-21.3�)
cccurring at 0.214 cfs on the Base Data:exist.tsf
and at 0 . 169 cfs on the New Data:rdout.tsf
�
I
�
PEAKS Cedar River Corporate Park
�.��� ��,�: , ,,�:; � � �,�» ; �
;
S��`'a t ��� _�r.,�:� � ;t,,.� ��' . ��,7 .:J , �.�r���. -�s.�`Si�� -^'" �� r �,n�FRkr r n.w.�.i1�'�':tw.�...:z, .� . ��k � � �'r�.�� s�}�w0'�A �Kt ..^ x
. . '� . ., � �� , .k... .,�r.. , v �.�� � . r,�.'�.� ,»,�. _,., ��:�:.
Return Period
2 5 10 20 50 100 ;
� ,
10� �, rdout pks in Sea-Tac — -
— � P,XIS��lI(5
Y1
I �
10 - -- - - --- _ -_._--�
N F� -- -- - �
V � , ?! a
m
rn ♦
ea
L v
U �
N
Q „ 00
:s
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- ♦
10 - - --
1 2 5 10 20 30 40 SO 60 70 80 90 95 98 �g
Cumulative Probability
k
Rrmov Caofure 1 35 74nrn-�ndav.N75iD7 1764w x 76fih
DURATION Cedar River Cornorate Park
�'w'����k� s5h�w`M�k�j N xX;h �R ..: . . . ... ..
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r�' ��t .k "��.�r x`t,.:,r t�+�.� � :��
� � . ,, ,, ... e .,� 1
� � r�out.dur ������
�
target dur •
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; Probability Exc�edence �
, . _. ..�.,.t�.�-,�:�.�,,�,, _W.;.._ .. ....�..�_.<<.�..�.:uw�,�.�._,.:t-� <.:�_:.�.,__�_�.`_� �..�_�___�_���. _._._.: __...::_.._._ �__: _:::.,,..�.. �_.._ . _. _..._�_.. �..���.....
-w �,.,. . � ,_,_
Reqion Canfurc. 1?9 i5nm-Fndav :✓^5477.i;65w a 770h
CEDAR RIVER STAGE STORAGE - SPLIT FLOW DETENTION POND (JUNE 2007)
Orf 1 (23%) Ort 2 (23%) Orf 1 {77%) Orf 2 (77%) Orf 1 (23%) Ort'2 (23%) Q (23%) OrF 1 (77%) Orf 2 (77%) Q(77%) Total Surface MATCH Diff Percent
Sta e ft Elevation Stora e cf Head (ft) Head �ft) Head (ft) Head (ft) Q (cfs) Q(cfs) Q Total (cfs) Q (cfs) Q (cfs) Q Total (cfs) Q (cfs) Area (sf) KCRTS Diff.
' ', ' ' ! ' ;
0.00 � 14.25 0.00 0.00 ' 0.00 0.00 0.00 � 0.00000 ' 0.00000 0.00000 0.00000 0.00000 ' 0.00000 � 0.0000 17710 ; 0 0.00000'OK '
� 14.69 7792.40 ' 0.44 � 0.00 � 0.44 0.00 I: 0.00450 ' 0.00000 0.00450 0.04210 0.00000 0.04210 0.0466__17710 ' 0.048 _ -0.00140 OK 'i 97.1%�
� 0.75 15.04 ' 132$2.50 0.75 0.00 � OJ5 0.00 ' 0.00587 0.00000 0.00587 j 0.05497 0.00000 0.05497 0.0608 I 17710 0.062 ' -0.00116 OK 98.1%'
1.06 I 15.31 18772.60 1.06 0.00 I 1.06 ; 0.00 0.00698 0.00000 0.00698 i 0.06535 0.00000 0.06535 0.0723 ' 17710 0.074 ' -0.00167.OK 97.7%I
1.52 ' - - - - -- ----- -- - I ----- i - -- _ -- --- ; ---�-- ;, -'I - - F Y-- o
15.77 26919.20 L52 0.00 1.52 0.00 0.00836 0.00000 0.00836 0.07826 0.00000 0.07826 ' 0.0866 17710 0.088 i 0.00139 OK 98.4/o'
1.83 � 16.08 _ 32409.30 1.83 � 0.00 1.83 0.00 0.00917�, 0.00000 � 0.00917 ; 0.08587 0.00000 � 0.08587 � 0.0950 , 17710 � 0.097 ' -0.00196 i OK , 98.0/o
2.14 16.39 T 37899.40 : 2.14 ; 0_00 2.14 ' 0.00 I 0.00992 ; 0.00000 ' 0.00992 0.09285 0.00000 ; 0.09285 0.1028 17710_�0.105 -0.00223'OK ; 97.9%
2.45 16.70 43389.50 ' 2.45 0.00 2.45 0.00 ', 0.01061 I 0.00000 0.01061 0.09935 0.00000 0.09935 0.1100 17710 ; 0.112 -0.00204'OK ; 98.2%',
'� 2.76 I 17A1 � 48879.60 2.76 0.00 2.76 0.00 � 0.01126 ' 0.00000 0.01126 0.10545 0.00000 0.10545 0.1167 � 17710 0.119 -0.00229 OK ' 98.1%;
3.22 17.47 Ii 57026.20 3.22 � 0.00 � 3.22 � 0.00 ! 0.01216 0.00000 ' 0.01216 I 0.11390 ; 0.00000 0.11390 � 0.1261 ' 17710 0.129 � -0.00294 OK {97 7/
3.53 17.78 ' 62516.30 � 3.53 0.00 I 3.53 � 0.00 0.01274 0.00000 i 0.01274�-0.11926 � 0.00000 0.11926 � 0.1320 �, 17710 0.135 -0.00301 OK 97.8%!
3.84 ' 18.09 68006.40 i 3.84 0.00 ; 3.84 i 0.00 0.01328 0.00000 i 0.01328 j 0.12438 0.00000 0.12438 i 0.1377 ' 17710 0.14 'i -0.00233 OK 98.3%','
4.15 18.40 73496.50 4.15 0.00 ' 4.15 ' 0.00 0.01381 ' 0.00000 ' 0.01381 , 0.12931 i 0.00000 I 0.12931 ! 0.1431 � 17710 i 0.146 ' -0.00289IOK 98.0%
j 4.61 _ 18.86 _ 81643.10 _ 4.61 0.00 4.61 0.00 I 0.01455 0.00000 ~ 0.01455 0.13628 ' 0.00000 ; _ 0.13628 ' 0.1508 17710 _I 0.154 _ -0.00316:OK _ 97.9%
-- , - - - - - , , o
. 7 , 142 0.00000 0.14292 0.1582 17710 0.161 -0.00282,
5.07 19.32 89789.70 5 0 0.00 5.07 0.00 0.01526 0.00000 0.01526 0 92 OK 98.3/o
I
_ 5.30 � 19.55 � 93863.00 5.30 � 0.00 � 5.30 0.00 ' 0.01561 ' 0.00000 0.01561 0.14613 0.00000 � 0.14613 0.1617 � 17710 0.165 -0.00327'OK ; 98.0%
5.68 l_ 19.93 I _ 100592.80 _ 5.68 0.38 ; 5_68 I 0.38 0.01616 0.03661 I 0.05277 0.15127 0.09074 0.24202 ; 0.2948 ' 17710 _ 0.298 � -0.00321 OK ' 98.9%a
_ 6.15 20.40 108916.50 6.15 0.85 ' 6.15 0.85 0.01681 0.05476 0.07157 i 0.15741 � 0.13572 0.29312 ; 0.3647 17710 ' 0.366 ' -0.00131 OK 99.6%;
6.76 21.01 119719.60 ', 6.76 1.46 ' 6.7fi � 1.46 0.01762 0.07176 �0.08939 ' 0.16503 0.17787 0.34290 � 0.4323 17710 i 0.434 -0.00171 OK 99.6%
' 7.07 21.32 125209.7�__ _-7.07 j 1.77 7.07 j 1.77 0.01802 I 0.07902 0.09704 0.16877 '� 0.19584 ; 0.36462 'I 0.4617 17710 Y 0.463 ' -0.00134';OK �-- 99.7%'' '
7.3� 21.63 130699.80 � 7.38 ; 2.08 7.38�2.08 '� 0.01842 0.08566 ' 0.10407 0.17243 ' 0.21230 � 0.38473 _ 0.4888 ' 17710 ' 0.49 -0.00119;OK '� 99.8%
8
-}-- ---- -- -
7.84 22.09 I 138846.40 _ 7.84 � 2.54 ' 7.84 _ 2.54 I 0.01898 I 0.09466 _ 0.11364 0.17773 0.23461 i 0.41233 0.5260 '� 17710 0.528 -0.00203'!OK�__ 99.6%
6.15 ; 22.40 � 144336.50 8.15 � 2.85 ; 8.15 2.85 ' 0.01935 0.10027 0.11962 0.18121 0.24851 ' 0.42971 0.549� ' 17710 0.551 -0.00167',OK ' 99.7%
-- 8.61 3.31-� 8.61 ' ------ _- -r _- - --- --- -; _-- ------
--- - i---- �------ - ---- -----�.
8.61 22.86 152483.10 i__ � �_3.31 _ 0.01989 0.10806 0.12795 0.18625 0.26782 0.45406 0.5820 17710 0.584 1 -0.00199 OK 99.7%.
__ -_ --- -� ---�
9.08 23.33 160806.8Q � 9.08 3.78 I 9.08 3.78 0.02043 0.11547 � 0.13590 ; 0.19126 ' 0.28620 0.47746 ; 0.6134 17710 I 0.614 ' -0.00064 OK 99.9%
� -', -- ! ,__ -- - --, --- - --- ------- --, --- - - -;
-- ---
9.10 23.35 ! 161161.00 � 9.10 _ , 3.80 9.10 3.80 0.02045 ' 0.11578 _ '' 0.13623 0.19148 0.28695 0.47843 � 0.6147 17710 0.616 ; -0.00134 OK 99.8%
Input Data:
--
Q{23%) Orf 1 dia. � 0.5 inches
Q(23%)Orf 2 dia=; 1.48 inches !
I i
�_ __
jQ(77%)Orf 1 dia. =' 1.53rinches _
!Q(77%)Orf 2 dia = 2.33 j inches
2nd Orifice for Control Structures North and South set a1 5.3 ft
Cedar River Overflow KCRTS-15 minute
„�_ ,
�: � �+� �'� � F� � � � h � Ay�� y, �' �6
F � � � � a �, f ..� �n��1 1 �"r � l] '�f� k4r
i�R��.nSS` 8 2 » . w ai '� �� , ..�. .. . . , .,� .....�`d,,,«
. �.�do,.G.�,.�a�.,.,..aa.m. ,, ,,,.`u���a. , . .. _. - .
��f�a �.� '.
Till Forest 0.73 acres�
Tiii P�st�ure� �.3� a�r�s�
Till Grass 1 .8� acres�
�U#wash F�rrest O.OD �Gres�
�
�
��t�ash Pasture'� 0.�� ac�es�
�uiwash �Grass� 0.00 ac�es( ��
�
�ett�nd �.00 acress
,
Impenr►ious 9.�2 acres' I
_ Tot�i __
' 11 .�3 acres
' Scal+� Factor . 1 .00 i 5-I�lin �educ�ed
Edit Flow Paths
7ime ��ries: 2062aa-of »
Compute T�me Series
Modi�y User Input
__..__..�......_..._.._..�._._...
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� File �a�r computed Time �eri�s [.T�FJ
RrA-i��n i'npn�rc, �-14-J7/'M-(��4�07,4,P4w r JR4h
il
. �
Project `��r� I`���l�R Project No. �� � z OO��� ❑ Page � of ■ �
Subject �U��•t't-�1it� Phone �Calculations ='r
With/To Sf'f�L��t.`��� Fax# ❑ Fax _
❑ Memorandum
Address #Faxed Pages O .
❑ Meeting Minutes �
Date ln�0� By �l , (-� ,5, ❑Telephone Memo
Civil Engineers
Structura!Engineers
-- C : � lc�_ S�v.�n� \�c_��i � ( wo� �-��h G���zo�.Y)
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2215 N.30th St.
Suite 300
Tacoma,WA
�(f - �j,F/ 1 ' Q= �� . 1 �G't`� � = O 7�y 98403-3305
2� ��� 253.383.2422
�.= Z�. � � �'�l.cl ' 253.383.2572 FAX
�SEATTLE �
1200 6th Aven
Suite 1620
Seattle,WA
98101-3123
If this dces not meet with your understanding,please contact us in writing within seven days.THANK YOU. 206.267.2425
206.267.2429 FAX
206200-dev
Flow Frequency Analysis
Time Series File:206200-dev.tsf
Project Location:5ea-Tac
---annual Peak Flow Rates--- -----Flow Frequency analysis-------
Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob
(CFS) (CFS) Period
4. 30 6 8/27/O1 18:00 11.71 1 100.00 0.990
3.00 8 9/17/02 17:45 8.60 2 25.00 0.960
8.60 2 12/08/02 17:15 5.90 3 10.00 0.900
3.46 7 8/23/04 14:30 4.93 4 5.00 0.800
4.67 5 10/28/04 16:00 4.67 5 3.00 0.667
4.93 4 10/27/05 10:45 4.30 6 2.00 0. 500
5.90 3 10/25/06 22:45 3.46 7 1.30 0.231
11.71 1 1/09/08 6:30 3.00 8 1.10 0.091
Computed Peaks 10.68 50.00 0.980
Page 1
Cross Section for Concrte Rectangular Weir
Project Description
Solve For Headwater Elevation �
�
Input Data �
Discharge �� �� ft'is li
Headwater Elevation 24.00 ft ',
Crest Elevation 23.50 ft
Tailwater Elevation 23.50 ft
Weir Coefficient 3.33 US
Crest Length 10.00 ft
Number Of Contractions �
Cross Section Image ,
� I!
�-
u=�un
�
1�JC�ft
�': 1 i) L I
H-�3
Bentley Systems,Inc. Haestad Methods Solution Center Bentley FlowMaster [08.07.066.00]
6/4/2007 3:09:20 PM 27 Siemons Company Drive Suite 200 W Watertown,CT 06795 USA +1-203-755-1666 Page 1 of 1
4.2 Bioswales Design
Discharge from the proposed detention pond, discussed in Section 4.1 above, will be
conveyed from control manholes via 18-inch pipe to the north and to the southeast
bioswales. Bioswales are proposed to provide stormwater treatment and to convey
drainage to the natural outfall points, the northern and southeastern wetlands. The
bioswales are designed in accordance with the KCSWDMdesign criteria. Specifically, the
treatment design storm used is the 2-year release rate from the detention pond control
manholes. Mannings roughness of 0.2 was also used, in accordance with the KCSWOM.
The bioswales were also checked for stability to convey the 100-year developed flow in
the event of an emergency overflow condition at the detention pond facility. Due to site
elevation constraints, the bioswale longitudinal minimum allowable slope of 0.75 percent
was used on the North swale and 1.0 percent on the South swale. As previously
discussed in Section 2 of this TIR, bioswale construction is proposed within the wetland
buffers. See Section 2 for further discussion of construction of bioswale facilities within
wetland buffers, and see Section 6 for the Wetland Mitigation Plan, which addresses
mitigation for grading impacts.
Bioswale Design Summary Table
Years Total Flows North South
Leaving Pond (cfs) (cfs)
Amount in cfs , Zgo�o ��o�o
� 2-Year 0.17 ! 0.0391 0.1309 !
' 25-Year 0.58 0.1334 0.4466
100-Year � 1.84 0.423z 1.4168
6 �� � �
Biofiltration Swale Worksheet
1998 Surface Water Design Manual
Cedar River Corp. Park
�lorth S���ale (23°/,)
Method of Analvsis (Section 6.3.1.1)
Step 1) Calculate Design Flows
Preceeding Detention QWq=60°-0 2-yr, developed. KCRTS flow with 15-min.step
Following Detention QWq=2-yr release rate from the detention facility
!f no high flow bypass: Q�00-yr- 0.4232 cubic feet per second, cfs
Q25-yr' 0.1334 cfs
Qy_y�= 0.0391 cfs
Water quality design flow: Qwy= 0.0391 cfs
Rainfall Region : (Se/ect One) �Seatac ❑Landsburg
Soil Type: (Select One} 0 Till ❑Outrvash
Forest: 0.728 acres
Pasture : 0.3 acres
Grass: 1.45 acres
Wetland : acres
Impervious: 8.61 acres
Scale Factor: 1 unitless
Time Step: (Select OneJ ,_ 15 -minute =,Hourly
Data Type: (Select One) U Reduced �Historic
Ste 2 Calculate Swale Bottom Width Qwq x nWq
b =
1.49 x y' 67 x so.5
Q•,�.q=water quality design flow �.04 cfs
nWq=Manning's Roughness Coefficient �.20 unitless
y=Design Flow Depth 0.33 ft
s=longitudinal slope,along flow 0.01 feet/foot
b=swale bottom width Use minimum 2 feet! 0.39 ft. feet 2'<b<10'
*If the bottom width is calculated to be between 2 and'10 feet, proceed to Step 3.
'If the bottom width is less than 2 feet, increase width to 2 feet and recalculate the design flow depth(y)
`If bottom width is more than 10 feet, increase longitudinal slope(s}, increase design flow depth(y), install flow divider and
flow spreader,or relocate swale after detention facility
Filename Kirig County Bioswaie �i�orksheet 9,9 Afanualrevised4-26-0',zls Tab���ORTH BIOSN;4LE 6.-'4i:00'2:�6 P�t1 �
I
�
Step 3) Determine Design Flow Velocity vw.q = Qwq / �,,,q F/ow Continurty Equation
Z 3 unitless
14Wq 0.99 sf
Vwq 0.04 fps
'If the velocity exceeds 1.0 fps,go back to Step 2 and modify longitudinal slope, bottom width, or depth. ,
'If the velocity is less than 1.0 fps, proceed to step 4.
Step 4) Calculate Swale Lenqth L = 540 vwq Swale Length (540 represents residence trme in seconds.)
L Use minimum 100 feet! 21.4 ft
`If the Length is less than 100 feet, increase the length to 100 feet,leaving the bottom with unchanged.
'If the swale length can be accommodated ont the sit,proceed to Step 6.
`�f the length is too long for the site, preceed to Step 5
Step 5) Adjust swale layout to fit on the site.
Reduce swale length and increase bottom width to provide an equivalent top area.
p►top — �b� {' bs�ope�L� _ �br + bSlope�Lf 398.00 sf
bf (Increased bottom width) 2.00 ft
bsiope (Top w;dth above sides) 1.98 ft
Li (Reduced swale length) 100 ft �
Go Yo step 3 and�ecalculate designflow velocity( v): using bf. � ' `
� - _ � ,., . ���.:.f. �. , ... _
Step 6) Provide conveyance capacity for flows hiqhter than Q� Q�oo-yr Q25-yr
* o.s7 * o.s o.az 0.13
A� Q� = 1.49 / n� A�•R� S o.as �fs
n� (Manning's roughness coefficient) 0.07 unitless
�C bY� +ZY�z 0.71 sf
R� (A��( b +2Y� ( Zz + l�os�� 0.23 ft
S (Longitudina!slope along flow) 0.01 fUft
y� (Depfh of the 25 or 100-yr flows) 0.43 ft
B) V100 — Q1n�;At00 0.50 fps II
'if v,�exceeds 5A fps,return to Step 2 and increase the bottom width or flatten slope. E ,
Size Summary I,
Land area is needed for fhe channel, access, setbacks, and,it necessary, area to convey high flows. I
�op (Water surface at conveyance depth) 398.00 sf I!I
Cross section rncludes depth, channel slope x/engfh, and,if necessary, underdrain and high flows. �I
Slope x Length (From Steps 3, 4 and 6) 0.16 ft I
Filename k�tng Counrn Biosx�ale «�orksheet 9F,�fanuclrevised4-'6-0"xls Tnb'�'ORTH BlOS4i;1L£6-�4�70G"Z:S6 P:1�
Biofiltration Swale Worksheet
1998 Surface Water Design Manua!
Cedar River Corp. Park
South S��rale (77%)
Method of Analysis (Section 6.3.1.1�
Step 1) Calculate Desiqn Flows
Preceeding Detention QWp=60%2-yr,developed, KCRTS flow with 15-min.step
Following Detention QWy=2-yr release rate from the detention facility
!f no high ffow bypass: Q�oO-yr- 1.4168 cubic feet per second, cfs
Q25-yr- 0.4466 cfs
Q2_y�= 0.1309 cfs
Water quality design flow: Q�„p= 0.1309 cfs i
Rainfall Region : (Select One) �Seatac ❑Landsburg
Soil Type: (Select One) �Titl ❑Outwash
Forest: 0.728 acres '
Pasture: 0.3 acres
Grass: 1.45 acres
Wetland : 0 acres
Impervious: 8.61 acres
Scale Factor: 1 unitless
Time Step : (Select OneJ ❑ 15 -minute � Hourly
Data Type: (Se/ect One) 0 Reduced ❑Historic
Step 2) Calculate Swale Bottom Width Q'"Q X n'"Q
b =
1.49 x y' 67 x so.5
Q,vQ=water quality design flow 0.13 cfs
n.�Q=Manning's Roughness Coe�cient 0.20 unitless
y=Design Flow Depth 0.33 ft
s=longitudinal slope,along flow 0.01 feet/foot
b=swale bottom width Use minimum 2 feet! 1.12 ft. feet 2'<b<10'
'If the bottom width is calculated to be between 2 and 10 feet, proceed to Step 3.
"If the bottom width is less than 2 feet, increase width to 2 feet and recalculate the design flow depth(y)
`lf bottom width is more than 10 feet, increase longitudinal slope(s),increase design flow depth (y), install flow divider and
flow spreader,or relocate swale afterdetention facility
Fiiemm�e Kirrg Counr�,Bios���ale �i`orksneet 95.�1anuclrevisei+-.6-0'..xls Tnl�SOL�`THBIOSI�AL6 6ia%iOG�Z 5'P,L1
Step 3} Determine Desiqn Flow Velocity �wq = (�wa / �,q Flow Continuity Equatron
Z 3 unitless
AWq o.7o sf
Vwq 0.19 fps
'If the velocity exceeds 1.0 fps, go back to Step 2 and modify longitudinal slope, bottom width,or depth.
`If the velocity is less than 1.0 fps,proceed to step 4.
Step 4) Calculate Swale Length L = 540 vWq Swale Length (540 represents residence time in seconds.J
L Use minimum 100 feet! 1�1.6 ft
"If the Length is iess than 100 feet, increase the length to 100 feet, leaving the bottom with unchanged.
�If the swale length can be accommodated ont the sit, proceed to Step 6.
'If the length is too long for the site, preceed to Step 5
Step 5) Adiust swale lavout to fit on the site.
Reduce swale lengfh and rncrease bottom width to provrde an equivalent top area.
Acop = �bi + bslope��-i ' �bt + bslope�Lt 398.00 sf
bf (/ncreased bottom widthj 2.00 ft
bslope (Top width above sides) 1.98 ft
�-f (Reduced swale length) 100 ft
3 f� f � �� 3��� ��� �
;Go tostep�andT+�c�l���te'design flow vetocity f v} usmg b{:
Step 61 Provide convevance capacitv for flows hiqhter than Qw; Q�oo-y� Q25-yr
* 0.67 * 0.5 1.42 0.45
A� Q� = 1.49 / n� A�-R� S �.s2 �fs
n� (Manning's roughness coefficientJ 0.07 unitless
� bYo +ZYc2 1.58 sf
R� �Ac �( b +2Yo ( Zz + �)o_s)) 0.34 ft
S (Longitudinal sJope along flow) 0.01 ft/ft
y� (Depth of the 25 or 100-yr flows) 0.56 ft
B) V100 — Q100iA100 0.90 fps
`Ifv.�eXCeeds 5_U f�s;:retum to Step 2 and increase the bottom w�d#I�€€or flaften slope.
Size Summary
Land area is needed for the channel, access, setbacks, and,if necessary, area to convey high flows.
Q�op (Water surface at conveyance depth) 398.00 sf
Cross section includes depth, channe!slope x length, and, if necessary, underdrain and high flows.
Slope x Length (From Steps 3, 4 and 6) 1.02 ft
:ile.nm�ie Kin�Counh-Bios�.=nie ��t'ortisheet 9�S,�fani�alrzvised4-26-U"..c;s Tab SOG"TH BIOSti�i:ALE Fi 4"_OU'Z S'P.�19
SELT10\ � 4 OPE'�I CHA\1ELS.FLOODPL_AIT��..�'�D FLOI.�D��'_AYS
TABLE 4.4.1.B V"ALUES OF ROCGH]�ESS COEFFICIENT "r�" FOR OPE'�i CHAVI.�ELS
Type of Channel Manning's Type of Channel Manning's
and Description ",a"' and Description "��"*
(Normal) (Normal)
A. Constructed Channels 6. Sluggish reaches, weedy 0.070
a. Earth, straight and uniform deep pools
1. Clean, recently completed 0.018 7. Very weedy reaches, deep 0.100
2. Gravel, uniform section, 0.025 pools, or floodways with
clean heavy stand of timber and
3. With short grass; few weeds 0.027 underbrush
b. Earth, winding and sluggish b. Mountain streams, no
1. No vegetation 0.025 vegetation in channel, banks
2. Grass, some weeds 0.030 usually steep, trees and brush
3. Dense weeds or aquatic 0.035 along banks submerged at
plants in deep channels high stages
4. Earth bottom and rubble 0.030 1. Bottom: gravel, cobbles, 0.040
sides and few boulders
5. Stony bottom and weedy 0.035 2. Bottom: cobbles with large 0.050 �
banks boulders
6. Cobble bottom and clean 0.040 B-2 Floodplains
sides a. Pasture, no brush
c. Rock lined 1. Short grass 0.030
1. Smooth and uniform 0.035 2. High grass 0.035
2. Jagged and irregular 0.040 b. Cultivated areas
d. Channels not maintained, 1. No crop 0.030
weeds and brush uncut 2. Mature row crops 0.035
1. Dense weeds, high as flow 0.080 3. Mature field crops 0.040 �
depth c. Brush I
2. Clean bottom, brush on 0.050 1. Scattered brush, heavy 0.050
sides weeds
3. Same as#2, highest stage 0.070 2. Light brush and trees 0.060
of flow 0.100 3. Medium to dense brush 0.070
4. Dense brush, high stage 4. Heavy, dense brush 0.100
B. Natural Streams d. Trees
B-1 Minor streams (top width at 1. Dense willows, straight 0.150
flood stage < 100 ft.) 2. Cleared land with tree 0.040
a. Streams on plain 0.030 stumps, no sprouts
1. Clean, straight, full stage no 3. Same as#2, but with 0.060
rifts or deep pools 0.035 heavy growth of sprouts
2. Same as#1, but more 4. Heavy stand of timber, a 0.100
stones and weeds 0.040 few down trees, little
3. Clean,winding, some pools undergrowth, flood stage
and shoals 0.040 below branches
4. Same as#3, but some 5. Same as#4, but with flood 0.120
weeds 0.050 stage reaching branches
5. Same as #4, but more
stones
' Note: These "n"values are "normal"values for use in analysis of channels. For conservative design of
channel capacity, 1he maximum values lrsied rn other references should be consrdered. For channe!
bank stability, the minimum values should be consrdered.
Direct Step Backwater Method
The Direct Step backwater method may be used to compute backwater profiles on prismatic channel
reaches (i.e., reaches having uniform cross section and slope)where a backwater condition or restriction to
normal flow is known to exist The method may be applied to a se.ries of prismatic channel reaches in
secession beginning at the downstream end of the channel and computing the profile upstream.
1i24/2005 2005 Surface Water Design Manual
4-62
Project�Pl7�1' �/f/�Y� Project No. LQ�i���. /� ❑ Page of ■
Subject JCGf_i�U ��Gt/`dC� Phone L_._1 Calculations =,'
❑ Fax _
With/To Fax#
❑ Memorandum
Address #Faxed Pages ; O
u Meeting Minutes �
Date�Lt/`G�l�t 2[e.��,d 7 By �. �/Y1/"[/ ❑Telephone Memo
Civil Engineers
, � C � � . Structura!Engineers
�
( � � �^ `^
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�� Cp v ��
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� �
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= 8 z 9�{� . � c � ����,�d
�r� � �a��v �r�ra��v �;,�-���v�s�o,vs
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l�o�orrl �rGQ = 5,�. �v' �C
� /' ; ❑TACOMA
\/� (v�� ���l���„� �� t,��. � Ci� > D �4 Q,'7 s.�C� 2215 N. 30th St.
� 1 � Suite 300
�e rj( � Tacoma,WA
(J 98403-3305
COKay)
253.383.2422
253.383.2572 FAX
�SEATTLE �
1200 6th Aven�
Suite 1620
Seattle,WA
98101-3123
206.267.2425
If this does not meet with your understanding,please contact us in writing within seven days. THANK YOU. 206.267.2429 FAX
5.O CONVEYANCE SYSTEM ANALYSIS AND DESIGN II''
The proposed storm conveyance system consists of CPEP pipe ranging from 12-inch to '�,
30-inch, double-walled, smooth interior and PVC. Stormwater runoff will be collected and
conveyed via gravity flow to the proposed detention pond. The section that follows
summarizes the design criteria used to size the proposed storm conveyance system for
the project.
Convey,ance Analysis Criteria: ,
The storm sewer capacity analysis is based on the following assumptions: I'�
1. The Modified Rational Method was used in conformance with Section 3.2.1 of the ,
KCSWDM. ;
2. Design Storm: 25-year (100-year was also checked). '
3. Runoff Coefficients: "C" values for the Rational Method are given below.
Calculations were simplified to remain conservative.
c = 0.90 for impervious surfaces, roofs and paving
c = 0.25 for pervious surfaces
4. The time of concentration for all areas is a fixed 6.3 minutes.
5. The peak rainfall intensity for the 100-year, 24-hour storm, Ploo = 4.0 inches, as
determined from Figure 3.2.1.D of the KCSWDM. '
6. Mannings roughness coefficient for the backwater analysis: n = 0.012. I,
7. Flow analysis and backwater calculations are performed using Rational Method and i
are attached on the following pages.
7 O� � O I
1or�oo nack� �o�-os-oa Xis �
RATIONAL PIPE FLOW CALCULAIC)R I
using the Rational Method&Mannin Formula
KING COUNTY DESIGN FOR 25 YEAR STORM
JOB NAME: Cedar River Cor .Park NOTE ENTER DEFAULTS AND STORM DATA BEFORE BEGINNING
JOB#: 206200.1 DEFAULTS C= 0.9 n= 0.012
REVISED: 5/8/2007 d= 12 Tc= 6.3
A=Contributing Area(Ac) Qd=Design Flow(cfs) COEFFICIENTS FOR THE RATIONAL METHOD"Ir"-EQUATION
C=Runoff Coefficient Qf=Full Capacity Flow(cfs) STORM Ar Br
Tc=Time oi Concentration(min) Vd=Velocity at Design Flow(fps) 2YR 1.58 0.58
1=Intensily at Tc(in/hr) Vf=Velocity at Full Flow(fps) 10YR 2.44 0.64 PRECIP= 3.4
d=Diameter of Pipe(in) s=Slope of pipe(%) 25YR 2.66 0.65 Ar= 2.66
L=Length of Pipe(ft) n=Manning Roughness Coefficient 50YR 2.75 0.65 Br= 0.65
D=Water Depth at Qd(in) Tt=Travel Time at Vd(min) 100YR 2.61 0.63
FROM TO A s L d Tc n C SUM A A'C SUM A'C I Qd Qf Qd/Qf D/d D Vf Vd Tt �
SOUTH PIPE RUN
CB#1 CB#2 0.08 0.20 99 12 6.3 0.012 0.9 0.08 0.08 0.08 2.73 0.21 1.73 0.120 0.235 2.82 2.20 1.47 1.12
CB#2 CB#3 0.24 0.20 100 12 7.4 0.012 0.9 0.32 0.22 0.29 2.46 0.72 1.73 0.415 0.450 5.40 2.20 2.11 0.79
CB#3 CB#4 0.11 0.20 99 12 8.2 0.012 0.9 0.43 0.10 0.39 2.30 0.89 1.73 0.516 0.509 6.11 2.20 2.22 0.74
CB#4 CB#5 0.11 0.20 99 12 9.0 0.012 0.9 0.54 0.10 0.48 2.17 1.05 1.73 0.609 0.565 6.78 2.20 2.31 0.72
CB#30 CB#31 0.14 0.33 68 12 6.3 0.013 0.9 0.14 0.13 013 2.73 0.34 2.05 0.168 0.275 3.30 2.61 1.93 0.59
CB#31 CB#32 0.34 0.33 64 12 6.9 0.012 0.9 0.48 0.31 0.43 2.58 1.11 2.22 0.503 0.502 6.02 2.82 2.84 0.38
CB#32 CB#33 0.11 0.33 59 12 7.3 0.012 0.9 0.59 0,10 0.53 2.49 1.32 2.22 0.597 0.556 6.67 2.82 2.94 0.33
CB#33 CB#34 0.11 0.33 64 12 7.7 0.012 0.9 0.70 0.10 0.63 2.40 1.51 2.22 0.682 0.605 7.26 2.82 3.03 0.35
CB#35 CB#34 0.14 1.20 69 12 6.3 0.012 0.9 0.14 0.13 013 2.73 0.34 4.23 0.082 0.192 2.30 5.39 3.07 0.37
CB#34 CB#5 0.32 0.20 76 18 8.2 0.013 0.9 1.16 0.29 1.04 2.30 2.40 4J0 0.511 0.506 9.11 2.66 2.68 0.47 I
CB#5 CB#6 0.11 0.20 126 18 9.7 0.012 0.9 1.80 0.10 1.62 2.07 3.35 5.09 0.659 0.594 10.69 2.88 3.07 0.68
CB#6 CB#7 0.14 0.20 76 18 10.4 0.012 0.9 1.94 0.13 1.75 1.98 3.45 5.09 0.679 0.603 10.85 2.88 3.09 0.41
CB#7 CB#8 0.32 020 115 18 10.8 0.012 0.9 2.26 0.29 2.04 1.93 3.92 5.09 0.771 0.657 11.83 2.88 3.18 0.60
CB#8 CB#9 0.12 0.20 77 18 11.4 0.012 0.9 2.38 0.11 2.15 1.86 3.99 5.09 0.784 0.666 11.99 2.88 3.19 0.40
CB#9 CB#10 0.21 0.20 77 24 11.8 0.012 0.9 2.59 0.19 2.33 1.82 4.24 10.96 0.387 0.432 10.36 3.49 3.27 0.39
CB�t10 CB#11 0.15 0.20 81 24 14.2 0.012 0.9 2.75 0.14 2.47 1.61 3.98 10.96 0.363 0.416 9.98 3.49 3.21 0.42
CB#11 CB#12 0.27 0.20 90 24 14.7 0.012 0.9 3.01 0.24 2.71 1.58 4.28 10.96 0.391 0.434 10.41 3.49 3.28 0.46
CB#12 CB#13 0.15 0.20 82 24 15.5 0.013 0.9 3.16 0.14 2.85 1.52 4.33 10.11 0.429 0.459 11.02 322 3.12 0.44
CB#13 CB#14 0.39 0.20 98 30 15.9 0.013 0.9 3.56 0.35 3.20 1.50 4.80 18.34 0.262 0.350 10.49 3.74 3.15 0.52
NORTH PIPE RUN
CB#29 CB#28 0.13 026 87 12 6.3 0.012 0.9 0.13 0.12 0.12 273 0.32 1.97 0.163 0.270 3.24 2.51 1.84 079
CB#28 CB#27 0.15 0.24 81 12 7.1 0.012 0.9 0.28 0.13 0.25 2.53 0.63 1.89 0.335 0.400 4.80 2.41 2.18 0.62
CB#27 CB#26 0.16 0.24 81 12 7.7 0.012 0.9 0.44 0.14 0.39 2.40 0.94 1.89 0.497 0.498 5.98 2.41 2.42 0.56
CB#26 CB#25 0.34 0.20 66 18 8.3 0.012 0.9 0.77 0.31 0.70 2.29 7.60 5.09 0.314 0.383 6.90 2.88 2.55 0.43
CB#25 CB#24 0.10 0.20 48 18 8.7 0.012 0.9 0.87 0.09 0.79 2.22 1.74 5.09 0.342 0.404 7.27 2.88 2.62 0.31
CBtt24 CB#23 OA5 0.20 56 18 9.0 0.012 0.9 0.93 0.05 0.83 2.17 1.81 5.09 0.355 0.412 7.41 2 88 2.64 0,35
CB#23 CB#22 0.10 0.20 44 18 9.4 0 012 0.9 1.03 0.09 0.93 2.11 1.96 5.09 0.385 0.430 774 2.88 2.69 0 27 '
CB#22 CB#21 0.11 020 111 18 9.6 0.012 0.9 1.13 OA9 agd Q7 2.07 212 5 09 0.416 0.451 R 11 2.88 2J6 0 F7
?OF200 backwater 2007-05-08 xls
RATIONAL PIPE FLOW CALCULATOR
using the Rational Method&Mannin Formuia
KING COUNTY DESIGN FOR 25 YEAR STORM
JOB NAME. Cedar River Cor .Park NOTE ENTER DEFAULTS AND STORM DATA BEFqRE BEGINNING
JOB#: 206200.1 DEFAULTS C= 0.9 n= 0.012
REVISED: 5J8/2007 d= 12 Tc= 6.3
A=Contributing Area(Ac) Qd=Design Flow(cfs) COEFFICIENTS FOR THE RATIONAL METHOD'9r"-EQUATION
C=Runoff Coefficient Qf=Full Capacity Flow(cfs) STORM Ar Br
Tc=Time of Concentration(min) Vd=Velocity at Design Flow(fps) 2YR 1.58 0.58
1=Intensity at Tc(in/hr) Vf=Velocity at Full Flow(ips) 10YR 2.44 0.64 PRECIP= 3.4
d=Diameter of Pipe(in) s=Slope of pipe(%) 25YR 2.66 0.65 Ar= 2.66
L=Length of Pipe(ft) n=Manning Roughness Coefficient SOYR 2.75 D.65 Br= 0.65
D=Water Depth at Qd(in) Tt=Travel Time at Vd(min) 100YR 2.61 D.63
FROM TO A s L d Tc n C SUM A A'C SUM A"C I Qd Qf Qd/Qf D/d D Vf Vd Tl
---- ------ ------ ----•------ ------ ---- - ---___ _______°______ ______ ______ ______ -
CB#21 CB#20 0.16 0.20 89 18 10.3 0.012 0.9 130 0.15 1.17 1.99 2.32 5.09 0.456 0.475 8.55 2.88 2.84 0.52
CB#36 CB#20 0.13 1.57 95 12 6.3 0.012 0.9 0.13 0.12 0.12 2J3 0.32 4.83 0.065 0.174 2.09 6.16 3.44 0.46
CB#20 CB#19 0.16 0.20 84 24 10.5 0.012 0.9 1.58 0.14 1.43 1.97 2.81 10.96 0.256 0.345 8.28 3.49 2.92 0.48
CB#19 CB#18 0.14 0.20 78 24 11.4 0.013 0.9 1J2 0.12 1.55 1.86 2.88 1011 0.285 0.365 8.77 3.22 2.78 0.47
CB#18 CB#17 0.13 0.20 74 24 11.9 0.012 0.9 1.85 0.11 1.66 1.81 3.01 10.96 0.275 0.360 8.64 3.49 2.98 0.41
CB#17 CB#16 0.15 0.20 64 24 12.9 0.013 0.9 2.00 0.14 1.80 1.71 3 08 10.11 0.305 0.377 9.05 3.22 2.82 0 38
CB#44 CB#37 0.11 0.69 102 12 6.3 0.012 0.9 0.11 0.10 0.10 2.73 0.27 3.20 0.084 0.194 2.33 4.08 2.33 0.73
CB#37 CB#38 0.52 0.20 95 12 7.0 0.012 0.9 0.63 0.47 0.57 2.55 1.44 1.73 0.837 0.698 8.37 2.20 2.46 0.64 '
CB#38 CB#39 0.38 0.20 90 18 7.7 0.012 0.9 1.01 0.34 0.91 2.40 2.19 5.09 0.430 0.460 8.28 2.88 2.79 0 54 I
CB#39 CB#40 0.57 0.20 90 18 8.3 0.013 0.9 1.58 0.51 1.42 2.29 3.25 4.70 0.691 0.611 11.00 2.66 2.87 Q52 I
CB#40 CB#41 0.36 0.20 83 18 S.8 0.012 0.9 1.94 0.33 1.75 2.20 3.84 5.09 0.754 0.648 11.67 2.88 3.17 0.44
CB#43 CB#41 0.27 1.40 102 12 6.3 0.012 0.9 0.27 0.24 024 2.73 0.65 4.57 0.143 0.254 3.05 5.82 4.10 0.42
CB#41 CB#42 0.25 0.20 74 24 9.3 0.013 0.9 2.45 0.22 2.21 2.13 4.70 10.11 0.464 0.480 11.51 3.22 3.19 0.39
CB#42 CB#16 0.32 0.80 115 24 9.7 0.012 0.9 2.77 028 2 49 2.07 5.16 21.91 0.236 0.329 7.88 6.98 5.69 0.34
CB#16 CB#15 0.36 0.20 100 24 10.9 0.013 0.9 5.13 0.32 4.62 1.92 8.86 10.11 0.876 0.723 17.36 3.22 3.63 0.46
CB#15 CB#14 0.16 0.20 88 30 11.6 0.013 0.9 5.29 0.14 4.76 1.84 8.74 18 34 0.477 0.487 14.60 3.74 3.72 0.39
COMBINATION
CB#14 Pond 0.00 0.20 61 30 12.0 0.012 0.9 8.84 0.00 7.96 1.80 14.30 19.86 0.720 0.629 18.86 4.05 4 41 0.23
6.O SPECIAL REPORTS, STUDIES, AND OPERATIONAL DOCUMENTATION
1. Wetland Analysis
lA. Wetland Mitigation Plan
2. Geotechnical Report
2A. Addendum to Geotechnical Report
26. MSE Wall Design
3. Traffic Report
4. BMP Implementation
5. MaterialInventory
6. Potential Pollutant Source Identified
7. List of Significant Spills and Leaks
8. Employee Training
9. Pollution Prevention Team
Forms 4 through 9 will be provided to property �wner for implementation during site
operations.
8 �� � �
1. Wetland Analysis
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Table o�F cor��er��s
EzEC[�TI1��S��";MA?Y.................._- --�----...---�----�-----.....---�----�-------._...--��-----------..._............._.....------.....------�---._..__.....----.....--�-------�--�---------..._.3
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-- -- ---
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------�-----�--------�- �......................... .� ---- --�-----
�l�T'�,A,�lD CATEGORI�ATIO?�.--��-�----------�-----�----------�-----------------�---------�-----------------�-----��----------�---�---�--�------�---�-------�------�--�---�------�-�--�-------��-------�
�i��`�AND DEu�rEATIOu RES��LTS---------��---------�-----�---------------------------�--...._..---------...----�----��------�---�-�-----�---�-------�---...-------��--��---------�-�---�--------------�-6
'.�?ge�r�lor�--........................................... -...- --..._...__.....- ..__.......-----...._._......_.....-----�-.....--......_....-------�---�--� ...._...--------�--�--.....7
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yaroiog�- �-..._.....__.__._......- -- ----�----- �-----.......--- -�---- ��------�--�- �------�--- -- �- ---� ----�---- ---------------�----..._..8
'r1=1`��vD DETE�MT�U,TION�CL�SS�FICA�?ON----�----�----------------------�--�------�-------------------.....------------�-------�---.._....---�-�--...-.--.._..----...._....------.........8
•�:e�i�nd A..-- ---- --. ...............................�-- --- --------------�-�---------�- ---�----�-�-�-----�--�---�--�-�--..__._..........--�----._-�--� -...----_8
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�TR�Eh"DEi'ERN�I1�!T10P��CLASS��?CP,T'f11t-�--------�--.....----------------------�-��-----------�----------------�--�-------�-------�--.._...-�-----------------�--...--�-------_........9
�HUR�'��MAS°1'lik FR�1G��M....-�---�------------�-----��--------�------�----------�-----�---------�--------------�---�---��-�--�---..._..._...--------�-----��------�------�--�-�----....--------q
r�i;,:;�LAT�R�?N�PLICaTIuhS--�--�--��----�-.................. ...._---...-�---9
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Paee �
�X�Li1t?l�e S�.�T,�n�i:;'��
This report presents the findings of a wetland analysis, stream characterization and
applicability of Shoreline Conservancy provisions that was performed by ��%PS on the
Seelig Lind ,Avenue property. Two «�etlands were identified, one located on the adjacent
property to the north and the other located along the south and east side of the subject
property, and the� boundaries of the wetland to the s�uth and e.ast as ���ell as the �outhern
boundary of the wetland to the nortb ��-e�re delineate.d.
SI'�k T1gSC1'Ip�TOL�
The 12.�7-acre site, Parcels 3340400285 & �02�0�9083, is located bet��een Lind Avenue
South and East `'alley Road, south of 5��� 19th Street in Renton, Washington. SV�' 215�
Street is located to the north and S��' 23r� Street to the south: ho«�ever. both of these
stre.et ROVI�'s ha��e. been abandoned (Figure 1, �'icinity 1�1ap). The site is curre.ntl��
undeveloped. A fire station is locate.d north of the northv��est propert`- corner (Parcel
#3�4040042�), a commercial development is located to the east bet�ieen the subject
parcel and the East �'alley Road; and a gas line is ]ocate.d on the parcel to the south,
�vithin the abandoned SVd 23`d Street RO`'�' (Parcel � �0230�9083). The parcel is nearl��
rectangular, with a"panhandle" at the northeast corner.
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Ftgc�e l_1'Tcm��r�Mcp .
The site was filled prior to 1970 v�-ith from 7- to 10-feet of dense fill material. Scrubb��
trees and shrubs have since become established on the site. The southeast corner and a
Paee z
narro« band ar��und the e.ntire site are. forested. The interior of the site is mostlt- scrubby;
tree species have generally not reached �0 feet or greater. Two mapped wetlands nearly
surround the site; a large ���etland lies to the north and a smaller «�etland��raps around the
east and south propert� boundary-. These ���etlands have been included in numerous
pre�-ious inventories, including the City of Renton's Rivers, Streams & VVetlands
inventon�. An unnamed tributarv of Springbrook Creek is located on the adjacent parcel
to tl�e south, sout}� ot the abandone.d 5��1- ���d Street RO«'.
l��e�:�yr.�� r;r�n,��u�T�,r�
Site visits occurred on.�ugust 2�, Se.ptember 23, and November 7, 2004, wherein CB��'E
e.xamined the study area for indicators of wetlands. The study area of the investigation
included off-site areas since it was apparent that wetland buffers extend onto the subject
parcel. ��'etlands were identified base.d on the presence of hydroph�tic vegetation, h��dric
soil, and ��-etland hydrology using the method outlined in the 1997 w'ashington State
i�'etlands Iderztification and Delineation IYlanual (R'ashington State Manual), and
following City of Renton regulations. The "routine on-site determination method" was
used to make the wetlands determination. The routine method is used for areas equal to
or less than five acres in size, or for larger areas «�ith relativel�� homogeneous vegetative,
soil, and h��drologic properties.
During the study area evaluation, 1� detailed data points were located in distinct
representative vegetation units in order to characterize the wetland and non-wetland
communities. Field observations at each data point were compiled on preformatted
��'etland Data Sheets, labeled DP1 through DP1�.
l�ege�a�io�
�regetation was evaluated across the study area to determine the presence of hydrophy-tic
plant communities. Plant communities are considered hydrophy�tic when more than 50
percent of the dominant species in the plant community have a wetland indicator status of
facultative (FAC+, FAC, & FAC-); facultative wetland (FACW-, FACW, & FACW-), or
obligate wetland (OBL), as listed in the �'ational List of Plant Species That Occur in
i�etlands, Region 9 — 1'�'orthwest (Reed, 1993 and 1988). The indicator codes for plant
�pecies are noted in Table 1.
Dominant species were recorded as species comprising more than 20 percent of the plant
communit� in each stratum (tree, shrub, and"orl�erb la�er).
TABLE 1. PLAI�T I'_�DICATOR CODES
� Indicator Code Frequency of Occurrence in '
; Wetlands
Obligate Wetland(OBL j—occur almost al���ays in wetlands >994 0
Facultative V,'etland(FACW*)—usually occur in wetlands 67-99% I
Facultative (FAC*) — equally likely to occur in wetlands or ', 34-66°'0 '
non-wetlands
�
, Facultative L;pland (FACU*1—usualh�occur in non-wetlands �� l-34°io I
Pa�e 4
Obligate Upland �L:PLj—occur almost always in non-wetlands <1% ,
; Not Listed ('_vL)—no indicator status ---
�
� * Note: FACV1', F.AC, and FACU also have - and—values to represent species near the wetter end ot
' the spectrum (y j and species near the drier end of the cpectrum{-).
�oTls
:anaerobic ("saturated� conditions cause soils to form certain characteristics that can be
observed in ihe field. H�-dric indicators include: the presence of a matrix chroma of 1 or
]ess in unmottled soi] or � or less in mottled soil, �leved soil. or�anic soils (peats and
mucks), and the accumulation of sulfidic material.
Soil pits v4�ere dug in each data point, using a sho�-e.l to depths of ]6 to l 8 inc.he�s belo«
�round surface (BGSI. Soils textures «�ere characterized using Natural Resourc�s
Conservation Sen�ice protocol, and examined for hydric indicatars as described by the ,
��%ashington State ?�-lanual. Soil colors were identified using a '�-lunsell soil color chart !i
(Kollmorgen Corporation, 1988). Depth of soil saturation �vas recorded for each data I,
point. «'etland Data She�ets are included in Appendix 1. �I
Several secondary data points «ere examined across the wetland-upland boundary in
order to determine. the boundary line, although data forms were not completed at the
secondan data points. The secondary data points �-ere used to examine similarities or
differences in soils bet��-een major data points and to establish mapped soil unit
boundaries.
�iudrolO99 �',
At each data point, observations of direct and indirect w�etland hydrolog�� indicators were '
evaluated and recorded. Under normal conditions, hydrologic indicators are used to '
determine if the hydrology is either currently present or can be inferred from the
guidelines provided in the VVashington State Manual. These indicators include: recorded
data, visual observation of inundation or saturation, «-atermarks, drift lines, sediment
deposits, drainage patterns, local soil sun�ey data, oxidized root channels, and ��-ater-
stained leaves.
�iEi9.A1�D CATEGORIZATIO�d
`T�etlands identified ��-ithin 100 feet of the site were categorized using the City of Renton
classification system. The city's classification system; (RI�7C 4-3-050 M. l.a., amended
on December 12, 2005) is as follows:
i. Category 1: Category 1 wretlands are wetlands which meet one or more of the ,
following criteria:
(a) The presence of species listed by Federal or State go�ernment as endangered '
or threatened, or the presence of essential habitat for those species; and;'or
(b) VJetlands having forty percent (40%) to sixty percent (60%) permanent open '
«�ater (in dispersed patches or otherwise) with t«-o (2) or more vegetation classes;
and:�or
Pade. ;
(c) �l'etlands equal to or �reater than ten (]Oj acres in �ize and l�a��in� three (�l or
more vegetation classes, one of which is open ��ater; and,�'or
(d) The presence of plant associations of infrequent occurrence; or at the
geographic limits of their occurrence; and,-'or
ii. Category 2: Category 2 ���etlands are wetlands ���hich meet one or more of the
follo��-ing criteria:
(a) Wetlands that are not Category 1 or 3 wetlands; and'or
(b) V�'etlands that ha��e heron rookerics or ospre�- nests, but are not Category 1
wetlands; and.-'ar
(c) Wetlands of any size located at the headwaters of a watercourse, i.e., a wetland
with a perennial or seasonal outflow channel, but «ith no defined influent
channel, but are not Categor5� ] ��°etlands; ancL�or
(d) Wetlands having minimum existing evidence of human-related physical
alteration such as diking, ditching or channelization; and,`or
iii. Category 3: Category 3 ��-etlands are wetlands �vhich meet one or more of the
follo«�ing criteria:
(a) Wetlands that are severel�- disturbed. Severely disturbed wetlands are wetlands
which meet the follo«-ing criteria:
(1) Are characterized by hydrologic isolation, human-related h�-drologic
alterations such as diking; ditching, channelization and�or out]et
modification; and
(2) Have soils alterations such as the presence of fill, soil removal and;'or
compaction of soils; and
(3)Ma��have altered vegetation.
(b) Wetlands that are newly emerging. Newly emerging wetlands are:
(1) Vdetlands occurring on top of fill materials; and
(2) Characterized by emergent vegetation, low plant species richness and
used minimally by wildlife. These wetlands are generally found in the
areas such as the Green River Valley and Black River Drainage Basin.
(c) All other wetlands not classified as Category 1 or 2 such as smaller, high
quality wetlands.
�iETLATi�DE�I�EATION RESnLTS
CB«'E identified t�i-o wetlands within the study area. The northern boundary of Wetland
A, located off site to the north was delineated to establish the extent of its buffer lying on
the Seelig site, and VJetland B. A summary• of the vegetation, soiis, and hydrology
observed in the wetlands and the on-site upland is presented below.
Page 6
��eqe�a�ion
The central areas of the site represented by DPs 1, 5; l0, and 12 are dominated by young i
black cottonwood �Populus balsamifera), �-ith a dense understory of Douglas spirea
(Spiraea douglasii) and scattered Oregon ash (Fraxinus latifolia) saplings. Cottonwoods
at DP � were sapling rather than voung trees and this central area of the site was opener,
supporting primaril�� herbaceous species. Other species growing on the fill material in
occasionally dominant cover include red-osier dogwood (Cornus stolonijera), Himalayan
blackbem� (Rubus procerus), sno��rbem- �Symphoricarpos alba), goldenrod (Solidago
canadensis), tansy (Tanacetum vulgare), �i�estern St. John's �rort (Hypericum radicata); ;
Scouler's willow (Salix scouleriana), and s���ordfern (Polystichum munitum).
DP 3 represents the southern edge of`b etland A. it is dominated by Hooker's «�illow �S.
liookeriana) and Douglas spirea; trace cover of each of the following species is also �
present: cattail (Tipha latifolial, Pacific �cillow (S. lasiandra), Scou]er's ���illo�;-, reed I
canarygrass (Phalaris arundinaceae); slough sedge (Carex obnupta); and sapling Oregon �'�
ash. The rnajority of ���etland A is dominated by reed canarygrass, }�ello�i- flag (Iris �
pseudacorus), deadly nightshade (Solanum dulcamara); black t«-inberry (Lonicera
involucrata) and various ���illo«-s.
DP 8 represents Vv'etland B. Pacific and Scouler's willows and red-osier dogwood co-
dominate.. Douglas spirea and reed canarygrass are also present and occasionall� I'
dominant. j
The forested fill banks of «%etland A are represented by DPs 2 and 4. Red alder (Alnus
�-ubra), black cottonwood, red-osier dogwood, stink currant (Ribes bracteosum), and
Himala�•an blackbem� are all variously dominant. DP 11 represents the forested area
adjacent to the north end of Wetland B «�here black cottonwood dominates in the
overstory, red-osier dog«ood dominates and Himalayan blackberry is also present in the
understory. DPs 6, 7; and 9 represent the fill bank off-site south of Wetland B. Reed
canarygrass and chickweed (Cerastium an:ense) co-dominate ��s�ithin the abandoned SW
23ra Street ROVI-'.
Soils
Much of the site was filled with high-grade structural fill (primarily comprised of well-
mixed sand and gravel) to depths ranging from approximately 5 to 10 feet.
The site is mapped in the Soil Surve�- of King County Area as Puget silty cla�- loam to the
w�est, and Snohomish silt loam to«-ards the east. However, it is evident from the soil
survey base aerial photograph that the site had been filled and converted to urban land
prior to the date of the photograph, which was taken in 1970.
The Puget series is made up of poorly drained hydric soils that formed in alluvium, under
sedges and grass, in small depressions of the river ��alleys. In a representative profile, the
soil is dominantly mottled dark gra}'ish-brown (2.SY 4.,2) and grayish-brown (2.SY S!2)
silnr clay loam to a depth of about 45 inches BGS. The substratum is gray, silty clay that
extends to a depth of 60 inches or more. Permeability is slow. The seasonal high �-ater
table is at or near the surface.
P age ?
The Snohomish series is a nearlv level hydric series rnade up of poorly drained soils that
formed in alluvium in stream valleys. The A (or surface) horizon ranges from very dark
grayish-bro���n (lOYR �'2) to grayish brown (2.SY 5.�) silt loam, and is mottled to the
surface. ?he B (subsurface) horizon ranges from very dark grayish bro«�n to gray and
from silt loam to siltv clay loam and loamy sand. Depth to layers of peaty material
ranges from 13 to 36 inches. Layers of silty clay loam to loamy sand occur �vithin and
belo« the peaty ]ayers. Permeabilitv is moderate in the upper part of the profile and
moderately rapid in the lower part. There is a seasona] high �i-ater table at or ne.ar the
surface.
As noted above, on-site soils do not match these mapped soils because the site «�as filled
prior to 1970. Four data points; DP 1, 5, 10 and 12, were established on the filled are.a. �
The soil �i-as very compacted and impermeable at all DPs. Soi] chroma is 3; mottling was
present at DP1 within the surface 1? inches. ,
Soil within adjace.nt���etlands at DPs 3 and 8 generally matched the mapped series.
Hudrologu
�'�%etland hydrology «-as not obsenred within the fill areas. Hydrologic indicators were
present onlv off-site at DPs 3 (WetlandA) and in Vvetland B at DP 8.
l��l���'dD D�TERMIPdAT�O�d�CLASSI�IG�.iI01u
Based upon presence of the three requisite criteria, ���etlands nearly surround the site on
three sides. The «�etland to the north, Wetland A; is an approximately 12.3 acre scrub-
shrub;'emergent wetland; Wetland A does not extend onto the subject property. Wetland
B, to the south and east, is a 0.6133 acre (26,714 square feet) L-shaped remnant scrub-
� shrub wetland surrounded by fill, 0.5117 acre (22,289 square feetl of��hich lies on the �,
Seelig property. The wetland delineation is shown on the V�'etland Location surve�� �
conducted by Bush, Roed & Hitchings, lne., dated revised Januar�� 24, 2006, attached.
We�land P,
V�'etland A has been designated Category 2 by the City of Renton. However, this wretland
could be considered severelv disturbed due to hydrologic isolation and ditching (along
the southern boundary), which are characteristics of Category 3 wetlands.
��l�etland A does not meet the criteria for Category• 1 for the following reasons:
Criteria a: There are no listed species;
Criteria b and c: There is no open water;
Criteria d: There are no plant associations of infrequent occurrence. The wetland
is dominated by reed canary-grass, yellow flag (Iris pseudacorus), deadly
nightshade (Solunum dulcamara), black twinberry (Lonicera involucrata) and
various willows.
On the whole, however, Wetland A meets the criteria as a Category 2 wetland.
Page 8
�
YJe�?m?d B
�T�'etland B meets the criteria as Category 3 on the bacis of human-related hydrologic.
alterations such as diking; ditching, channelization and'ar outlet modification; soils �
alterations such as the, presence of fill, soil removal and/or compaction of soils; and
altered vegetation.
ST����M DET��UdATI01u�G1:ASSI�CAT�OIu
An unnamed tributar�� of the Springbrook Creek is located off-site approximately 150 feet
south of the south property line of the surject property. The stream is included on the
King Count�� GIS Assessor's maps and is identified in �T�'DF��' SalmonScape as
documented habitat for Coho salmon. Per RI��1C Title Il-', Section 3.L.l.a., Class 2 waters
are perennial or intermitte.nt salmonid-bearing �vaters «�hich meet one or more of the
follo��-ing criteria:
(a) I�7apped on Figure Q4; Renton Water Class Map, as Class 2; and,'or
(b) Historicall�� and,-'or currently kno���n to suppon salmonids, including resident
trout, at any stage in the species lifec��cle; and'or
(c) Is a ��ater body (e.g., pond, lake) bet��-een one half(0.5) acre and t«�enty (20) �
acres in size. I
Buffers for Class 2 streams are 100-feet from the ordinary high water mark (OH��I-M); the �
OH��'I�-1 of the subject stream lies gre.ater than 100-feet south of the northern boundary of
the Class 3 wetland buffer so the stream buffer does not affect site development. '
SHORE1:11�E MASiER➢�O�R��M
Title IV Section 3.090 G. designates three Shoreline environments, .��atural,
Conservanci�, and L rban, to provide a uniform basis to appl� policies and use regulations
within distinctivel� different shoreline areas. Both Wetlands A and B have been
designated Conservancy Environments. Sections K and L provide guidance on factors
that must be considered in using these environments. Among the uses that must be
considered, the only potential use relative to the subject property w�ould
be En��ironmental Effects. Such affects include pollution and Ecological Disruption, i.e.
potential effects on water quality, water and land vegetation, water life and other wildlife
(including, for example, spawning areas, migration and circulation habits, natural
habitats, and feeding), soil quality and all other environmental aspects must be considered
in the design plans for an}� activity or facility which may have detrimental effects on the
environment. Applicants for permits must explain the methods that v��ill be used to abate,
avoid or otherwise control the harmful effects.
R�GULATORY IMP!�C��TIO��S
he��l�ds
Per Title N Section 3.OSO.M.6.c_; Category 2 wetlands in Renton (i.e., Wetland A) are
protected with 50-foot buffers and Category 3 wetlands (VVetland B) are protected with
25-foot buffers.
Page 9
Title �, Chapter 3.O�O.C.� �Spe�ific Exemptions — Critical Areas and Buffers), allo���s
discharges to wetlands and construction of bioswales in wetland buffers as described
below:
i. Ne��• Surface ��%ater Discharges: '�iew surface water discharges to wetland
Categories 1, 2 and 3; or buffers of Categories 1, 2 and 3, and to streams or lakes
from detention facilities, prese.ttlement ponds or other surface �vater management
structures; provided, the discharge meets the requirements of the Storm and
Surface ��'ater Drainage Regulations (RI`�C 4-6-030); �;-i11 not result in significant
adverse changes in the v��ater temperature or chemical characteristics of the
��-etland or stream'lake water sources; and there is no increase in the existing rate
of flo��� unless it can be demonstrated that the. change in hydrologic regime would
result in equal or improved «�etland or stream:`lake functions and values. V�'here
differences exist bet���een these regulations and RI�1C 4-6-030, these regulations
«�ill take precedence.
ii. Storm���ater Management Facilities in Buffer: Stormwater management
facilities in critical area buffers including storm�vater dispersion outfall systems
desi�ned to minimize impacts to the buffer and critical area, where the site
topograph�� requires the.ir location w�ithin the buffer to allo«• hydraulic function,
pro��ided the standard buffer zone area associated with the critical area
classification is retained pursuant to subsection L or M6c of this Section, and is
sited to reduce impacts between the critical area and surrounding activities. For
Habitat Consen�ation Areas, this exemption applies only to Catego�� 1 «etlands.
Storm��e�ater management facilities located in wetland buffers shall require buffer
enhancement or buffer averaging�-hen the�� are sited in areas of forest vegetation.
No impacts are proposed to wetlands on the. subject site. However, a bio-filtration swale
is proposed within the buffers of Wetlands A and B; as sho«-n on the storm drain plans.
These areas are forested as may be seen in the photographs below. Per Title 4, Chapter
3.OSO.C.� ii., quoted above, buffer enhancement plan will be provided per the proposed
Conceptual Buffer Enhancement Plan, belo„-.
Photograph 1: Forested buffer at ]ocation of proposed bios��ale, Wetland .4.
� ' __ . �. . �j.
..�i�' /l f �
I �
4 L`
� � 1 �
,: F � ;,�, . ¢
,:. �, ; ��
� x� . .
�, � `�� �-
� .
��
�`�
t .��� ;,;
�� Photograph 2: Forested buffer at location of proposed bioswale, Vl�'etland B. Note the ��
wetland boundan� (standing wate�r) at the bottom right of this photograph. '
-.. x- �.�,
� _"� �� � _ �
,__ .
� -�� f1, - x r �_;
� �, . , ; �
� �- � �� j, �� �� ��`�
3 l: { � ���� _e � k. �
��. 9'
,a
As can be seen from these photographs, the buffer at both «'e,tlands A and B are
dominated b}�black cotton�i�ood at the location of the proposed bioswales.
.�i�."�f�?)S
The stream located south of the SVl' �3rd Street RO��' is protected «-ith a minimum 100-
foot buffer, per Title IV Section 3.L.1. No stream buffer reduction or averaging «�ill be
necessary on this project.
���or�l��e Canser��ancy
No impacts to a Shoreline Consen-ancy Environment, i.e. the wetlands or stream, are
proposed.
Proposad bu�'�er irnpQ�,s
A total of 1,727 square feet of on-site buffer within the buffer of VVetland A and a total of
�,979 square feet within the VVetland B buffer wrill be impacted to construct the proposed
bio-filtration swales.
Go�cep���'B��'�er Enhancer�en�Pl�
To compensate for tree removal pursuant to the proposed bio-filtration sa-ales within the
buffers shown in the photographs above, the applicant is proposing to plant 300 conifer
seedlings, i.e. 200 Douglas fir and 100 western red cedar, within the approximately '
�5,000 square feet of onsite buffer lying outside of the proposed bioswales associated
«-ith Wetland B and 12,000 square feet of onsite buffer assoc.iated with V4'etland A. The
e.xisting buffers are currently nearly devoid of coniferous trees, so this proposal will
result in a significant habitat improvement to the wetlands and buffers. The seedlings will '
be distributed randomly throughout these buffers, targeting areas with few trees to '
e.nhance survivorship. The number of tree�s that will be planted is disproportionately great ��
Pace 1] I
compared to the area of proposed impacts; attrition is e�pecte�d due to the. impracticabilit��
of irrigation or other maintenance activities. Planting �ril] occur in November to enhance
survivorship. No monitoring of the plantings is practicable nor appropriate; it is
anticipated that even if survivorship of as little as 30°% of the total trees plaiited occurs,
these trees «ill ultimatel�- compensate for the total 5,706 square feet of buffer impact
area.
�
i
i
I
I
Page l2
p�FF����(`�'c
Hitc.hcock, C.L., 3nd A. Cronquist. 19^:. Flora of tl�e Pacific �ortl�«est. Uni��. c�f
LVashington Press, Seattle.
King Count_y Plannin� Di�isi�n. 19�6. ltin` Count� �'� etland� In�ent��n '�otero��l:.
Volume 2 East�
King County, Vl�'ashin�ton. Sensiti�°e. :�reas 1�1ap Folio, December, 1990.
I�7etro King County ��%e.bsite. G1S Center.
��rw�-5.metrokc.govisen-leticom.esri.esrimap.Esrimap?Ser��ice?�ame=over�ie����
Client....
Microsoft TerraServer lmagery•. Ilttp:'%terraserver.homeadvisor.msn.coill
Munse�ll Color. 1992. A9unsell Soi] Color Charts. Kollmc�r�en lnstniinents Corp..
Baltimore, MD.
Reed, P.B., Jr. 1988. '�ational List of Plant Species that Occur in ��l�etlands: T�ational
Summary. U.S. Fish and «�ildlife Se�rvice; VVashington, D.C. Biol. Rpt. 88(�'4�i.
�44 p. 1993 I�Torth�vest Supplement, Region 9, December 199{.
Snyder, D.E., P.S. Gale, and R.F. Pringle. 1973. Soil Surve.y of Iking �ount� Area.
Washington. L'.S. Soil Consen�ation Service, ��'ashington, D.C.
Soil Conservation Service. 198�. Hydric Soils of the State of Washington. t�.S. Soil
Conservation Service, Vdashington, D.C.
Soil Conservation Service. 1987. Hydric Soils of the United States. In cooperation with
the National Technical committee for Hydric Soils. U.S.D.A. Soil Conservation
Service, Washington, D.C.
U.S. Fish and ��ildlife Senice. 1993. Northwest Supplement to National List of Plant i
Species that Occur in V4'etlands: Region 9. Biol. Rpt. 88(24). '
��'ashington State Department of Ecology. 2004. Re�-ised V��ashington State V4'etlands
Identification and Delineation Manual. Ecology Publication #04-06-025.
V�'ashington State Department of Fish and V�'ildlife SalmonScape.
http:%,/wdfvv.�va.go��!ma�pin�;'salmonscape!index.html
Page l3
b I ��Ed
SW��� d�'dt�T��I,L`d�dIG1�����1 U�'1�rZ�N
I �I X1Q�d�a�i� �I
�I
I
f D,-�T:� FOR�1 1 iR�v�sed)
� Routine �F'etland Determinadon
(«.a State 1i'etland DelineaDon Manual or
1987 Co s ���etland Delinea2ion '�4anua1l
� �'�)cCUSiiC: � � , Q11t� ^ '� /�
Ir�{I,�� ���(��'ti � ���� �(_,/�-.�
I i
A �rinVoµ�c;: ` Count;�: �
FP �.2,e_.�a �f y�
� S;�ie: / �.
:�•:tsti_ator(5� �.����Lfv S�T,'i2: ��.'-��-
IDo!�c�rmal Ci�umstancc�cxist on thc sitc:' ���; no �\ Communit� ID: . .
�I Ls�c sice si�nificarnh•di�turbed (an pical situ�cion i".' ve; no ; Transrct ID; _, ,,
Is;he zrea a potentt�� Problcm Arca' ��es ne , Pio: ID: ���-- f
l '-,, ,� J i r� -
EzDianatior. o`a:�• i�al or�robicrn a*ca: :���� �.--t����, � � �' -- --
� �"EGET.ATION (For�trata. �ndicate T= tree: 5 = shrub: H =htrb: V =vinc) I
Derninsn� ?I�n: S�ecics Str�tum �c co�cr Ind•,c�tor pominant Plan� S�e�ies Sir�tum �'c �o�er Indicator
� � �
�- _,�-�-- , � ����...: I
�a.:k. �-D.�.��� -� !" .�J i I
� � I c ��- -
� �. ;-�
�ti ��tSy'.1 U !�j -'f°;f,V�.�
I (J j i {
�
� , �
II
�
H1"DROPKI-I'IC �'EGEiAT10� I�DICaTORS: �
; �o`dominana OBL.F.=+�', � F.�C �t7�).
i .
ICh��k all indi:ators that a�pt�'g t�p:ain belo«: �
IVisual absen ation of p:ant spcc;ts�ro«•ir.� in Phvsiolb�icaUreproductit•e �dapt�tions
� arcas oF prolor.sed inun��tior.!:�tur�tion «'ttiand p;ant da[abasc
Mo.^�, hoio�icai adap;a[ions Pcrson�l knowL-d�c of rc�ion�l plam rnmmur.itics ,
Tc:hnica' L;ieracurc Oihcr(ez fain)
I Ht�droph��tic vegetation present^ nes no
Rati�nalc for dccision�Remart:s:
I
�i
i
I Hl'UROLOGY . _
Ils i:tiiz grou fn��cason' . .z� no �'atcr Marks: �cs no 1 Scdimznt Dtposits: yes no
Bascd on: ✓��=soil �emp(record temp } Drift Lina: yes o Drair.�,�e P:,�terns: yes no
othtr(ex lain) �
Dept.�of inuncation: --'�inchcs Ozioized Root{li�c roo�� Local Soil Sur�e��: yes no�
�/,? Channels<I 2 in.�•ts (f�o' �
D:pth to frre w•ater in pir. � inch.s L�;����;-'- FAC Neutral: y�es , 0 4. Water-staincd Le��es yrs� �
Dcvth to sa[uratcd soil: �--inches !f �� '�
Chcck a!1 that appl}� &e�ptain belou�: ` Othcr lexpiain):
Sv-cam, Lake or gage da[a:
Aer.al ho�osra hs: Other:
Wedand h��drolo��• present'. �•es no ;
Ra�ionale fo-dccision/Rzmarks: �'—
I �OTLS
I
I '.1ap Un;� '�am: Drair�a�e Ciass �
��rics � Phasel
Field obse;ti•ations conrirrn �'e� r;o
, �
; T�.tior,om� ;su�Qrou ) ma d tv e.
Profile Description
I'xpth Honion Matnx color '�lottle colo:-s �toriz a5�ndance Ttxture, concrttion�. Dra��in� of:oil !
_
(inches) , (1�4unse1l (P�1un�ell size � :ontrast struccure. etc. protifz j
moist} moist) lmatch d��cription� I
,c^.�_. � �
, �=�` '` 1 �'�R 3i I --- _ a%��� I
,
i � � `)'�"�-,�',��, ,.�'`�,' � --��
I��� l � �_ �� �' � � l' � � �
t . ,...' , ;`J ;`, y�� ' ^ ,� � �-On� ..�`-''r.�:/`�-c''_ZL� �
I � i ' � � �` �^�y`,�-� %��.�.��
, ,- �j'+ - . � -- ._ , � �..__
/ C r �" n /i � �y�
�v"�� i ./Vl, /:� �� "'1,r(.iV Gt�1
�d.��
/.
/ � �
I � l
���t..J' , � �`` .t�:._kJ-C� �f'_l"i �� ,t.:i',-�
�. a��-f i ' :, r; �
�
H��dric Soil indicators: (chcck all ,i:at appiyj i
Histosol Matrix chrarr,a <_ ? with mottles
! Hisuc Epipcdor '�1g or Fc Concrctions
I Sulfidic Odor HiQh Orsanic Contcnt in Surfacc La�•cr of Sand�- Soils
Aqu�c Moisture Re�imt Or�ani: Str.akinQ in Sand�� Soils
R�ducine Condicior.s Listed on \ationallI_ocal H�dric Soils Li�t
Glzvzd or Low-Chrorr,� (=1 ; inatri� Othcr ie�elain in remarks) ;
H��dric soils present' ��es no .
Rational� for dccision/Remarks:
� �'�'etland Determination (circle)
Hvdroph�tic vtRctation presenc? vcs ` no
Hvdnc soils prescnt? .es� ne Is th: sampling point �ts no,
u'ztland h��droio^v resent'' ves n ; ���ichin a wetfand''
RationaleJRemarks:
!�OTES: ����`[�'t'�� ��U�YI.� �, �-.- �� ��,� ��y,�
C; � ' �, r
2(.rt-��-Zli� (�r'`tE..b-'�.C'•Tz-C:�t'�_, ��c�, ?lC'e—`'L .
��
, �� 'f � � `�,fi,-.�`"!.i �.'Gx1C,� f�l.L•t"a'G''°''"'�. �t���` ��sz~'„�SXI t�tlrt�� tti"'",�_
, , ,y�l; ��rtil-�f,s� �
�n. � �u � f; � �� -i,�.� ��.�- R.n,.�� Gv� �-Avt-�f/—".
• i '�: ��;�j^�►'v�'`. '7�� � l� Re�zsed 4�97
It�.l,' Y�l.(ll. C� tf�1 k��i /
I � �i'4��
l.J r'✓l,�iQ.����..�
D:�Tr1 FOR,�1 1 iRrL•ised)
Rou�ne 1Yetiand Determination
(«.a State «etland Dclineation ?�4anual or
19S' Co s «etland Delineation !�4anuall
?;ojccL'sitc: . natc: �'^ �, � ,,,,_� /G
� �, c
c.v�_ec� � �;� a-��. ��t��_ l
.q lic�n:,'owTcr- � �_ � � I Counry:
FF �c-�t��,/!'..t.�%� ��P_C�. ;�!14�_��
'l yl � S:ate: z-� �
� Inlcsti�_�;o.��� �. S�T',R: l;:..G_�,�.,�,,,�}�ti
D,� `�c,rmal Cirrurr.stan�►c tzist on �h:siac' ''�t�t no Communi�� ID ,
C_ �= �,
is �hc �itc si�nif,cantl� ois�urbcd (a��pica; iitu�tion�".' vts �no J Tr�r.�ect ID: `'- "
Is chc arca a pcxen[ial Probicn Arca' / ����� ' ��zi i'n� Plo; iD: J=�`�� r'r
F��;an�tion o`at�� ical or �blcm arca: G � �CTf�/ C_ ��� �' -- . _
�'EGET,4TIOti (For strsca._indica�c T- trec: S = shrub: H =nerb;�'_�inc)
� Derninani Plan: S ccies Straium �- co�er lndi�ltor pominant P:ant Specics S;rai um �'c c��er lndi�aior
�( ��(. �' 1.���� �� �i`��� 1
.F'r��? �Jr�: � .� '� �.: ��w'
� i ,� � � �
���� ,�r�% �� �
, �' j
i i
' � � I
i
; � �
; F-�'DROPEil'TIC �'EGETATIO'� 11DICaTORS:
� �--;
' �of dominar.0 �BL, r�C'�',d: F.�C li'v
i
i Cn�ck all indi��tors that appl}' R txplain belou: .
i
i �'sval obscr��ation ot�lant s�cics �ro�t�in� in Ph��siolo�icaUre�rcduc�i�e �dapcations
� arcr.�of prolonoe�' �nund�tioN:�t�ration «��tland plant da��base
; `�1o:pholo�ic�l adap:ations P�rsona! %nowicd�c of r-_ionz' ptant commur.iues
Tr.t�nical Litera[ure O[her(ex lain)
I Hrdroph}•tic vegetation present^ .•�� no
; '�
� Ratiora{c for dccision/Rcm�.�i:s:
HZ�ROLOG�'
, 1s it:iit gro�ir.� se;son' �es no v�ater Ma;4s: ves\ no Scdimtni Dtposi[ . ,cs no
�' on
Gased on: �o l�✓(re� temp ) Drift Lines: >•es no Draina_'c P::ttcrns: ���no
othcr{czplainl
De�t.o;inundation: � inches Otidized Root(li�e root Loca! Soi1 Sur��e�-: y�s no
�- �.,..l�i� Channels<1?in. ��ts no
Depth to frct w�ater in pi.: inches �7�' r=AC ?�eutral: yes �o Wacer-stainzd L,ea�� s y no
th to saturaccd soil: � inches ��
Check all rhat apply &e�plain bclou�: Other(czplain):
Strcam, Lakc or gasc daca:
Acria! hotos-a hs� Other.
wedand h��drolog}� present? ��•es no
R.a�ionale for decision/Remari;s: Li
� SOILS �
i �
' ' ;ap Unit '��:ne Draina�e Class I
�:rics � Ph�se)- �
Field obse;vations conl"irm Yes No I
i?aronon;� isub�roupl maa�d type'' I
Profife Description
De�th Honzon 1•4atrix color '�1o:clz colors �lo�;lz ahundance Texture, coneretionc. Dr�.ti in� of.oil
tin:hes) iMunscll (Mur.ccll siu �: contrast structurc, �tc. profil:
moist) moist) lmarch dcscri�tion)
��_�'�� 0 R '� ,� I ��L
, �..- ��,
_ ,
���,
� �
� ' `� � ?
,.i '�}¢.�.
� `�/ /
f��./'�/!/�.I v" �".�
L
, 1 �-��-.��J�� �C'�-�.�.._
H�'dric Soil Indicators: (�hcck aU tna; aDpl��l �
Histosoi '✓ Matrix chroma <_� with mott;es
Histic Epipedon Mg or Fz Concretior.s
' Sulfidic Odot Hish Oreanic Content in Surtacc L���er of Sand�� Soils
Aquic Moistur- Rctrir-iz OrQanic Streaking in Sand�� Soils
� R�ducinQ Conditions Listed on \ationaULocal H�dric Soils Li�t
Gltvzd or Lo«•-Chroma(=1) macr:x O�her ;z�:clain in rerrarks)
� H��dric soils present' '�• no
Ra+ionalt for decisioruRema:ks:
i
�
I ��'eiland Determination (circle)
H�nroph��tic vt�etation present? y�-_y�' no
Hydrie soils ortsent'' � no Is the samplir.� point �ts . no
V�'ctland h��drolo�v resent^ nc ���ithin a w�tland°
RationalcJRemarks: ��
��- � ��- .� 1��.����.�1 _ � � �,�,�.�.��__
�' J ,
�. .
I . . ,
?�OT£S: fG� (�"-�G�,��ww
C�
Revised 4l97
D,aT,� FOR�t 1 !R�i�ued)
Routine \�etland Determination
(«.a State titi�etland Delineadon Manual or
198i Co s �ti etland Delinea:ion �Sanuall
{ P-vjcc�/Si�c. , ��:;.s f% i , . ^ � � Da:�. .�-�f' /.;cl,/ ��
_s,',r�� �^�. ;�-f 1-'' � -'�f G f{, t �'.
I �FPlir�nVouTtr " County: ,(�. ��
f �'�
� S:�tt: � l.. .�_
` .--, �"�rn✓�-�
I Ir.tcs�i�_�toris, �!. �J� �1.(,�, S,"T;R:
C.�:vc.-
Do!�c�rma:Circums�anccs czist on cnc sitc^ jc� ' no �ommunii� ID: , .
is i�c siic s:rn;ficamlv di�iurbcd (as.pical situation�' vz, � T,�nsec; ID.
Is Lhe area a poien�i�l Problcm Arca' ��es no--, Plo: ID: �j� j _
F��lan�tion of an• icai or ro�lcm arca� ,
ti"EGETATI�ti (ror stra:a, indicate T= vee: 5 = shrub: H =her+�: V = vinel
Domin:,n� Pia�t S :cics S[ra:um 9c co�cr Indic�tor pominant ?lant S�ccics Stra�um �ic co�cr Indicator
��` ,�" --- �-�' � � �;«�v/". �; i��� :� � �7� �
� �
� �, �
� `�kti � ( �'� � •C;P�,l ` �a�1 ' l
� � ��r _) '
i � �
�.
1 �� ��_ % ,.
�'' � ' ��'� .�-� � �-�- `
�
; � ,. � �����s � �
u�$�e�-c,�i—` ; �
l Y-� ' p�� ,i 1'1 ���.�(_f�.' G�"�'??�� t�}�� � �
Hl'DROPHITIC�'EGETATIO'� I�DIC.�TORS: � ��� �0� ���r� '
�'.�of dominanu OBL. F.=+Cu',�C F.aC���� � ' ' T -
`�" l�.'WL �'-u--�- ��9,�- �.,�, ;�f�
Chcck al! indicators tha: �?Diy c� txpi5in belo.�-: V � �
Visual obser��a:ion ot plarn sx:ies�r��l-ir.� in Phvsiolo�icalireproducti�•e �dapta;ions ��
areZ� of proloneed inu�d�tion!>atur�tion «�etiand plan;database
,4lorpholoeicai adap;�tions Personal knowlcdgc ot re�i�nal ptant rnmm�r.it;es
Te:hnical Lizr�ture OLher fetiplain)
Htiaroph}'tic �egetation presen[' �es. no
Rationalc for dccision/Rcm::ls: �.
H1'DROLOGY
is it thc gr��:in�scason' ��es no ��ter Marl-s:� �es no Szdimtnt Dcposits yes o
on- -
Based an{��-� soil tzm. lrecord temp ) Drift�incs: �•ts no Drair.a�_e P;,nerns:�s no
othtr(cz laini
Dep�.bf inunda.ion: inches ��j Oxidized Rooi {ii��e roots) Local Soil Sur��e�•: yes no
�'�-�-
� � Channels<12 in. �•zs no �"
D:pth to frcz u•ater in pit: �inches F.4C Neutral: � y�es\i • Water-stainzd l.ea�as�yes nn
D th to sa�ur�ccd soil: �incncs
Chect;all tha[appiy &:�plain beiow•: Other(ezplain):
Sv-cam,Lakc or gase data:
Acrial �hoto�ra hs� Othcr:
Wetlaod h��drolo�c presen[' j�•es � no
Rationale for decision/Rzmari:s: ``.-��
�
� cpILS
� ?v:ap Uni; '�a.�e DrainaQe Cl�ss
Sc:ics 8: Phase}
Ficld observations con�irm Y"e� �vfl
LT�.tonom� (sub�rou^'� mapped ;ype? �
� Profile Description
��th ; i-�o-izon Mac;ix cotor '�Io[ts�co;o� �to[tlt �bundance Texture. coneretionc, Dr�u in� of�oil
(in.hes) I (Munsell (Munsell siu 8: c�ntrast struczure. ctc. profil�
moist) moisti lmatch dcscnptionl
�� �«� I
��� -� ��
,
� r'
r � � ,;I l -- �...�� C�-�"���� �!r�.�l'��
==�_-,-r� {�__ '',%';�,%�y�/�, '%_� j,��;� � �' �,
t- '
I I /
i
� I
I �
� ! �
I
H��dric Soi! Indicatocs: (chcck al1 chat applyl ,/
Histoso! " Matr.x chrom� <_ ? with moalzs
Hisuc �Dipedon ?�4�or Fe Concrecions
j Sulfidic Odoc Hi�h Or�anic Contcnt in Surfncc L���cr of Sandv Soils
Aqwc Moisturc Regimz Or�anic Str�akin� in Sand�� Soils
R�ducinQ Condicio�s L.sted on \a�ionaL/I_oeal H�dric S��ils �i�t
� � Gl�vtd or Lo�t-Chrorn� !_!) matri�: Other(t� lain in remarks)
H��dric soi�s present? �� no
Rationale for decisionlRemarkb:
�
«'etland Determina[ion (circle;
1
Hydroph�tic vt�etaii�n present^ , no
i Hvdric soils present? �5 n� Is the sampling point ��ts nc
� 'w�ctland h��droio�v rcsen�? es no �ti�ithin a wetland^
� Padonale'Remarks:
�
r,
�
i � o � /� -���-r�t�' �i7�� . - • _ �
�
:; . . . ,
�
�oTEs: , / �� � . ��- �� �-j-- �,�
��� I ,,�� �- �
. v���v
,
' ��'' � �s�Gt,
,� .�
� ��� �� �D Revised 4/97
`p lo, r�,�w1 c_
D.aT.a FOR'�i 1 �F.t�•ued)
Routine �tietland DeterminaDon
(«.a State «etland Dclineation h'ianual or
19�7 Co s «e.land Delineation ?�':anual)
Prujcc;,'Siic: <���' � ���� � Da[t: �� � .���'
/i.�_ � G� .%/
� ,,
Ai pliranUo�-n�r: Co�nty: n
� �
Staie:
� In�cszi�_�ier,sl: � v� S-T�R: �y��l'L. .
� Do'�c�rmaJ Cirumscancc�exist on chc siic:' - �e no Commur,i!� ID: ,
Is thc cite si�niticantl�� dis�u�d iat�pical si�uation��.' vt, n� Tr�r.s�ct ID: �
I �� ,
! Is [hc Zrea a potcn:i�l ProDlem Area' n � ,� � ��e����� ' Ploi ]D: �;; �
� �:�f�na[ion of an� ical or robfcm arca-f �''
� ��EGETATION (For ;trata, indicate T= vee:�S = shrub: H =htrb; �' _�'1f1C1
Do:ninarn Plani S ccies Stra:um �% ce�cr indicator pominam P;ar.t S�e:ies Str��um �� co�er Indi�aTor
�' �' �''
' 9 —�-- ,�� � ,,., � �� � ,.�--- -i ,��
��`��?�_- �`}-1+.�'./'✓'_ i P� J � l/ ,_� �`� � �
�,,x �� %' i'� -�'+-���f�%- �r:,�� ,/.�'r-�� T- � z- ,r
!� % � �,�� .C�` � j ��%"���_ �� �� y--�� I �.� �_ � ,�
�'��
' - � �,' � I 1 ,
I �"l,?.cf. ��. � �� � �" �-"!�F ,f.i
� ^ C/ =''� ���i � i
.�. -�� .�- �,� :� �-���� ,
�jr�� %%t,u/�ti-�__ '�,;``�% ,T— , �����,�.
, �.
H1'DROPEi1TIC �'EGETAT O� I\DIC.aTORS:
�r e�dominanu OfiL. F.aC`�'.S F.�C�
Ch_ck ail in�icators cha[a�p1�•g :�pt�in 5eiot�:
visaa{ obscn-ation of piarn sxci�s�ro�t•in� in Phvsiolo�icaUrcproducci�•e�dap�a�ions
arca.� of proloneed inun��tionl>a[uratior, �t t;l:,nd plant database
h�o:pholosical adapta�ion� Pzrsonai knowl►dge of rerional plant:ommu:.i;ies
Trhnical Litenture O[her(explair}
H��droph}•tir vegetation present^ ��es no
Rationaie for decisionlRemarks:
.
HZ�ROLOG�'
Is it ih��r��in� scson' �es no �a�er hlarks: �es o I Sedimtnt Dcposits: yes no�
� on �-
B:>ed or,: �''..�� soil temp�record cemp ) Drift Lincs: �•es no Draina��c P::tterns: }•es no
o[her(cx lain t
�ept.'of inundation: inches Oxidizcd Root (li��c root Local Soil Surtie�-: yes n
��rLi Channels<IZ in. �•ts 'n
Dcp[h to irc: w•aur in pit: � inchts �--a FAC NeuvaL• y�es n Water-stainzd L,ea�es yes �i�
. th to saturat�d soii: � inchcs ` v
Check all that apply &e�plain below�: O�her(czplain):
Str_am,Lake or gaoe da[a:
Acr,al ho�o�ra hs: Other. �
WeQand h��drolo��' praent' �•es no ,
Raeionale for decision/Rzmarl:s- `. '�
�
�o1Ls I
E =---
, �:ap lini� '�a.�ne D-ain��C I=I:SS �
>cricti � Ph�e;
Fie3d obse;vation5 co��:r., Y"e� ?•Io I�
� Ta�onom�� i s��o-oup� mapped ty�e'' � I'
' Pro�le Descripflon III
TY_p;h ' i�onzon � Matrix color '�1ott1� color, �tottiz �bundance Texturc, concretions. Dr���in; of soii �i
(inches) I ("h4unscU (Munxll site R cont:�t structure, ctc. pr�fiiz '
I moist) moistl � lmatch dc�cription)
� ���� �&��,
:�-;.��- 1�-- 1��� %� -- `- -' �--�,
� i �� '
; I
I f i
� I I
� � �'
'I H�dric Soil Indicators: (c�cck all tha� appl��j
I Histosol Macrix chroma <_ ? with mottlzs
4 �Histic Epip�don Mg or r� Concrc:i�ns
� Suifidic Odor High Or�anic Content in Sur�acc L���er of Sand�� Soils ,
' Aquic '�9o:st�rt Regir:t Or�anic Streakins ir,Sand}� Soils
R�ducins Condi�ions Listed on �a[ior.aL�Lo.:.a1 H�dric S��iis Li�t
� Glzvzd or Low�-C:�rom� 1= atri� O;her l.xclain in rema�ksi
H��dric soik present? �•es r��
Rational: for�ccisiori/Remarks:
�
i t�'etland Determination (circic)
H�droph�tic vt�e:ation prexn�' �� no
Nydric soils present? yes 'n' Is the sampiing point �es no-
�'�tland h�•drolo�v resent.^ ves no ��'ithin a wetland''
Rationale'Remarks:
@- ���. �� � ���� �-t �/�.
G� ��
v
�oi�s:
Revised 4J9i
D�T.� FOR�I 1 (Reti�ued)
Routine ��'etland Determination
1�;.� State «�etland Dclineaoon I�]anual or
198' Co s «etland Deiineation !Vlanuall
�
ProiccuSiic: �'� �!%I q� �Z�l1.C-��—_ � aic: � %o� -�j`�'`�t� �
� � �
Appl�czr,t,�okrcr: �" County: ' �j
����e_ ;'��i`' /
n
Ir,���;i^�toris;: ,jD b � S'T;R: ,�P-1��1�—'
De!�<�rmal Cir�ums[anc:�t�iu on thc site' . no Communin ID:
is t;tic citc si�nificlntiv di�tur�cd (at�pical si[uationi'.' �zs � Tran�tct ID: '
Is chc a�ea a poicn�ial Problem Area' � �es � � r'lo[ TD: ��,-�
c.zol�r.�tion of an• icai or roblcm arca: J�YL���.Q '- %G'
�'EGETATION (For str-ata, �ndicate T-/vcc: S = shrub: H = htrb: V -vinc)
Dorninant Piant SDccScs Str��um �r co�cr Indicaior pominant Plant S�ccies Str�wm 9� co�►r lndic�ror
I �
� � � '
' ��>;,»r., �-i�-�'� C,-�.,, ?t;� %:h-�. , lG�ti ���--�- ��_ ,C� �-�
�, ' �� ; ';� � �'�''�.! � Y�,�..Cc�_�, �" � �� ,�1/�'
i: �� I • , �
� � � � � �,� �, j �
� �,?� �'�L�'� �i—r- � ✓ �, v L�-
Yl
�;��.�_ � �c I ''✓� � ;=A� ; I
�� i
� �
f'-�' S:�- /��,=�^-�' /�" ` !' I=.�tl��V'
I �
,��:r � "=`r^.ti,� �-;'- �%, �-�
H1�ROPFi1T]C �'EGETATIO'� I\DICaTORS:
%;_
z of dominanu OBL.FACu',� F.�C ;' � '
Check all indicators thac�pp1;•ct e.�p:�in belo��:
Visnal obser:�:ion of pi�nt so�cizs ero���in_ ir: Phvsioio�ieaUreproducti��e �d�pta[ions
arc��of proloneed inundltionl>atura:�on «�ttl�nd p:an;da:abase
hlo�pholo�ic�1 adap;acion> Pzrsor.al knowicd�c of r_�ional piant commur.ities i
Tr�hnicaf Lic�rawrc Othc�(cz lain) 4
H�droph}•tic vegetation present' � no �
P.acionalc for dc:ision/Rcma:4s:
Hl"DROLOG�'
L i[ch� �ro��in�scason.' �zs ' no �'ater Mar1s: ves � Scdimtnt Deposits: yes o
�/'� ll'�-QGl , or
B.sed on: soii te . (record t�mp ) Drift Lines: yes n� Drain���e P:,nerns: �•es no
othtr{ez lain)
Dcpt.bf inund�tion: ^ inches Oxidizcd Root (li��c root Locz! Soil Surve�: yes no
,�,� � Channcls<l2 in. �•ts '�
Dcpth to free �•ate;in pit: ioches ��' w,� FAC Neutral: yes no W'ater-staintd Lea��es y� n6
,
D. th to saturatcd soil: �""" inches
Check all that appiy �e�plain belo�•: Ot6cr(ezplain):
SuLam,Lake or gasc�'aca:
Aer,al hotoora hs: Othcr.
VVctland h�-drolo��• present? �•es �
Ra�ionale for decision/R�marl:s�
i SO_ILS
I ►v1ap Lnit '�ame Draina�e Class
�r,cs c� Phase)
Fie1d observations conrirm Yes No
� Ta.ronom�� isuberou �) ma�xd tv e'
Profle Descriptio❑ �
I�pth Horizon Ma:rix colot '�loulz coloz �iottl: �bundance Texture, concretion�. Dral�in� of:oil �
� (inches) i il�4unse1l (?�lunscll si2c 8: contr�st structurc, etc. profiir �
mostl r,ioistj (match �cscnption�
�,�' �, ���/'
t' --k�"�� , _ � ��, — — �"`" ,
v – : ;�
✓
f �
I
'
, f �
� � � � , .
� i
� H}�dric Soil Indicators: (check aIl tha; app:�l
IHistosol I�9atrix chroma <_ '_' witn mon{cs '
i Hiscic Epipedon Mg or Fe Con�retions
I S�lfidic Odor HiQh Orsanic Contcn: in Surfacc L��•cr o�Sand�� Soils
Aquic I�toisture Re�imz Gr�anic Strcakins in Sandy Soils
RtducinQ Conditions 'isted on \ational/Loca1 H}dric S��ils Lict
� Gizvtd or i.o���-Chrama(=3� atri� Other ie�:plain in rema�ks)
; H��dric soils present' ��es no
i Rational: t"or decisioNP.em�.rks:
I
' «'etland Determinat+on {cucle) -
Hvdroph�tic vt�etation present'. ��� � ,�-� _
� Hydric soifs prts�nt? V�s ` n Is the sampl�nQ point �zs no
I �'zlland h�•drolo�v resent'' es no ���ithin a wetland^
( RationalelRemarks: �
I
i �
� �.
'�OTES:
Rerised 4a'97
D,�T.-� FOR�1 1 lRtvuedl
Routine ��'etland Determination
(«.a Siate «�etland Delineation I�tanuaf or
1987 Co s �ti�e[land Delineation !�tanuall
Pn�jcc✓Si�c: /,[ , , Dacc- f j /..7i�� ,1
1�'� �l-� r� `f
r
� A?pliran�ou�tr: �.�(�� County: � ..
�ta:c: �ti'y�_� �!��t�� I
In�cstic�torls`: �.-'I- 2�'i��'" S`TR �
, Uo?�n:-rnal Cir�umstanccs czist on[hc siu'. �c� no � , Communi!� ID , .
j 3s i�c si►c si�nific�rtl��di�rurbed (at�pical situ�tion�.' s•% no '�, p Tr�nstct ID: , � _, , '
�� �� � ti.. �
� Is �hc zrca a po�enti�l Problcm Arcal' ��zs no U v`^" Ploi ID: ^, _
Ezvlan�tion of an• ical or roblem area
�"EGETATION (For strata. indicate T= vec: S = shrub: H = htrb: V - vine)
Domir.ant Plan: S�ccies S;ratum 9c ce�er lndic�to; Dominan� Pian: S�ccies S:ratum �ic co�er � Indicator
' �l� �i' /,{� � � i ��i �� �
� �
�
i
i (
I � �
� I
i
� �
�
F-n'DROPHITJC �'EGETATIO'� I\DIC.aTORS:
�o`domirans OBL. F.-�C�',b F.�C '
Chtck all indicacorz �ha�a�p)}•g ��pl5in bclo��� �
,
Vis�al obsen-a�i�n of pl�nt soecics �ro�t�in� in Phvsioio�icallreproducti��e adapta�ior.s
ac��of prolor.ged inun��tior,!>�turaucn «�ttland plan;�a;abase
h�orpholoeic�l adaptz[ions P�rsonal know•ledgc of:t�ionll pian;comrr,u^ities I
Tr.hnicai Lic�rature Other{eti lain) �
�
Hidroph}�tic vegetation present? � ��es � no
Rationalc for dccision�Rcmar4s: ��
� H1�ROLOG�'
� �
Is it thz gro�ins season° / �es no� �'atcr Marl's: ��u o Stdir.��nt Dtposits: ye no
�'�.-��, ��,9-�-`�' �" .
B� d on: so�l �zm tret rd ttmp' ) Drift Lines: >�cs n Drsin���e Patterns: yes noT
other(ex�lainl
LY_pt.�of inunda�ior.: — inches Ozidized Root(li�c roo , Loc�1 Soil Surve��: yes o
,, �f� Channels<12 in. ��es rlp'
Dcpth ro frct �.�acer inpit: � incht{s\�w I vV �AC Neutrai: y�es no� Wa[tr-stained i.eares yts�
D th to saturatcd soil: inchcs �•�
Chcck all tha� apply&e�plain below•: Other(explain):
Ststam,Lake or gage data:
Aerial ho:ooraDhs: Other:
Wedand h��drolog,��prescnt? �•es ! no�
Ra[ionale for dc:ision/Remarl:s:
i S�_
�
� *1ap Unic '�amA Draina�e Class
>c:ics R Phase)
I Field obser��ations con�rm Ye� ?.I�,
i Tacanom�� isu�oroupl maD�� tYpe"' I
Profile Description �
;epth ' Honion Matrix color ti4octie colo:� �1o;;it abuncance Texture, concretionc, Dra��inrt of soil
(inchcs) (Munscll (�fun�cll size �. :ontrast structurc, etc. profilr
moisc) moist) (match detcnption�
�-`� 'l' ,�� lZ 3�3 %_.�,�-�
,
1 �
, I
, . t
+ � I
�
, ;
H�dcic Soil Indicators: (chc�k all chat appl<<) '
His�osol Mauix chroma <_ ? with mottlts ,
Histic Epipedon ML or Fe Con�r-tions '
� Suffidic Odor Hioh OrPanic Content in Surfacc L3rer of Sandv Soils
' .�quic Moisturc ReQim� Oreanic Streakino in Sand}� Soils
� R�ducin� Conditions Listed on �ationaULocal H}dnc Soils Lici
Glzvtd or Lo�4-Chroma t=1) mavix Other(espiain in remarks)
H�dric soiLs present:' ��es �� _
F.ational� for decision/Remarics:
�
I �
'�
� �i'etland Determination (circic) .
�
jHvoroph��tic vz�etation present'? yc no
', Hydric soils pr:sent? yes � Is the samplin� poin; �ts no
�'�tland h�•droi�_v Dresent'' vcs e ��'ithin �wetland''
i Rationaie/Remarks:
I
'I i
I ' � �
! � .
�OTES:
,
Revised 4/97
D,-�T,a FOR�1 1 iR�v:sed)
Routine 1��etland Defermination
(«.� State «eiland Delineation Manual or
1957 Co s «etland Detineation ?�4anuall
Datt:
PrujccL'Sitc � i �
/ ''�_� �-c.�-e_ ;/ �l� �'
� ��FFlicanlio�:i�r: � Cour.:y: /-��
, `t�� �,. - S tat c: '" " J �'�.Q,
.'
Ir,t-,ticator;s): C;- � � �it.G'v
�'i�'i�: �'k'
� pa!�<�rma1 Circumst�ncc�tzist on [hc site' '��� no � Communit. ID: �._
Ls th; cite si�nificanti�� di�turbed (at.pic�l situa:ior.�' `yc�i no � � � Tr�r.s�ct ID: � � _. .
Is [he �:ea a poie:�tiul Problcm.4rca' yes o� ��'�-- Ploi ID: 1..�� �"' ; _
�.olan�tion of a;�• i�al or roblem a ea: � � ,
�'EGET.ATION (ror st�ta. indicate T=tree_ S = shrub; H =hzrb:�'= ti�incj
Dorr�inan� P'.an. S�ccics Strs�um 9t co�•cr Indicacor pominant Planc �Dc:ies S:r�cum 4� co�cr Indicz�or
�,�4i�;_ U.��,� ?�1-- l�"� � �..(, �� � i o�-� I �
, � ` �- �� �
1�.� �����, i � � o �-
I � � �r ' �J�, �}1 4 �-�-_� ,-�--- �-�� �:�
� ,
/` � � � �
( 1 �'i �; � �"s � �' ,�
i � � _
�
' �=
Ha`DROPHITIC �'£CETATIOti I\DIC.aTORS: � '.
;= of dorninanu OBL. F.�C�`,� F�C �D�L
Ch�ck all indicators tha� aopl}• g �xplain belo��:
Visuaf obscn-�iion of pi�m soccits �ro���in� in Ph�-siol��icaUrcproductiL•c �d�ptations
are��of prolonsed inun�ationi;atu-�uon «'ttland plant database
hlorphoio�i:a!adag[a[ions Pzrsonal l:nowicd�e of re_ional pl�ni commur.ities
Ttchnical Littraturc Other(ez lain)
H�droph}•tic vegetation present' ��a, no
R.ationalc for dccision/Rcmarts: -'
HZ�ROLOGY
i- o o � � V�'aier Mar�: �es no �% Stdiment Dtposits: yes , o .
� .� �t tht�ro�-in_sesor.'' �es no � .
' ��r�U� �G�o�_ -,� `�"
�n on
Eased on: soi] �zmp erecord t�m� ) Drifr Lines: ��es no Drain,�_�e PaTterns: �•es nc�
othtr(-x lain 1
� Dept.bf inund�tion: `� inchts Ozidized Root(1i�-e roots Loca! Soil Surve�': yes no
�, �,�n�- Channcls<12 in. �•zs n
L'icpth to frcz M•a[cr in pit: " inchts rAC NeutraL• �e na W'a�er-stained L,ea�'es yes no
ih io sacur�ud soil: '-' inchcs
Cneck all that apply &e�plair below: O�her(ezplain):
Stream, Lake or gaoe data:
Aerial Dhotosraphs: Other:
VFettand hrdrolo�� present? �•es no'��
r2a:ionale fo�dccision/Rtmarks:
j � � �'-r�l"'
�.�.�� C���.���-�' `l�� � � � �
SOILS
i _
�ap Uni� '�ame Draina�e Class
crics � Ph�e;
Field obs�r��ations conTirm Yes Ne
�'aYonom�� (sub�rou ) mzp d t �"'
Profile Description i
IY_p[h ' Ho:izon Macrix color '*4ottie colors �lcttlz abun�ance Texture, concretionc. Dr���in� of�oil j
iin.hes) (T�4unscJl (Munsell size � contrst structurc, etc. pr�fiit i
mois.) moist) tmatch dcccri�tioni �I
J� -I � ��TZ � � `� �' �I
, �
;
� �
, �
I i I
� , � I
ft�dric Soi] Indicaton: (chcck all tna�zpplyl
Histosol Matrix chroma <_ ? with mottlts
Hisuc Epipedon P�1� or Fz Concretions
Suifi�ic Odor H:�h Oroanic Contcnt in SurFacc ����cr of Sand�- Soils
� ' Aquic ivtoisture Re�imz Oreanic Scrtakin� in Sand}• Soils
I i RtducinQ Condi�ions Listed on \ationallLoc�l H}dric Soils Li�t
I Glzv�d or Lo��-Chroma (_;) matr;x Other(t.� lain �n remarks)
H��dric soiLs present'. ��es �no
Rationalr for decisionlRerriarks:
t��etland Determinati�n (circic)
Hydroph��tic vt�etation prexnt'. vc no
Hydric soils present7 yes no ' Is the samplin� poin; �cs no '
�'attand h�•drolo�v resent'' es no 1 ���ithin a wetland''
RationalclRemarks:
i�' . .���J� .
���� ��-d�i�t'
'�OTES:
Revised 4l97
D,�T.-� FOR�1 1 ;Rtvised)
Routine �Vetland Determination
(«.a State «'etiand Delineabon Manual or
19fi i Co s «�etland Delineation ?�:anual)
; ��;����s�,_ ;_� � �; ca�t: /l /� i r
� ��'4�� /;�'��-� / 7 � J �
� APPlir�n��ow-ncr- .�� County: y� /�
Statc: �`�`4 /
� � J�
Ir•�-s,i�_storls; C- '� „��� S:'T,R:
Do Nc,rrnal Circumstan�c�ezist on chc siic' ''cs� no Communin ID: .
Is�hc �icc si�nificarni�•disturrd (a��pical si�uationi.' vz; � ' Tr�n�tct 1D: ,, ,.
Is�hc area a potcmi�l Problcm Arca' ��e� o`. Plo: ID: � �_,, � _
:��l�na.ior. of a:�•Di�al or�roblem area: �1�
�'EGETAT10ti (For�trata, indicate T=vee: 5 =shrub: H = herb: ti'_�ine)
Domin�ni P:ant S ccies Str��um << ce�cr Indic��or pomir.ant Plan�Spccics S�raium �c co�r Indi��ior
` '!� ;^ �, �.1� � �
r'
� �� ,f� I `�._� ��n � � �/,
-'li
,� �� ` . I �
� ' y � I � �� ��'�N
� � i
I ,� '��'-�. --��� i �� .-2--'0 -I'�� i
� �--�y"`v�`{/l ��-Fj't--- �-� �'✓ �� .l�'� �
I �' _ '/1+ _� /� ^
V l , L��-V f j �`� � C V'`i
� '��i
�J ,
�
� H'i DROPFi1TIC �'EGETATIO'� I\DICaTORS:
�
� .` 1 .
� ':�o`do:nir,ants OBL. F.���',� F.aC !�,L��
f �
� Cn-ck all indicator-s tha��ppl} d: {xp:ain b-io«�: .
�'isual obsen•ation of p:an[ speci�s ero+��in� in Ph��siolo�icaL�reprooucti�•e adaoca�ions
arc_.�of prolar.�ed inunda;ionl��twl:ion «�etland plan; dacabase
1•1o:pholosical ndap;ations Ptrsonal knowicdgc�{rc�ional plant commur.ities
Tr.hnical Literature O[her(explain)
H�droph}�tic vegetation present^ �-es� no
Ratior.aic for dccision/Rc:r,ar4;s: �
H1'DROLOGY
ls i: tht gro�in�se:son' ��es , no , �'aier Marks: �es o Sediment Dtposits: es no
����-�iJ�� � on
Bucd on: �so�l cemp (record ttmp ) Drif�Lin�s: ycs �no Drain_�c P�tterns: �•c -no
othtr{e�plain�
Dept.�oi inund�tion: --� inches Oxidii�d Root(iirc roo Loc�l Soil Survc�'. e no
Channds<12 in. ��ts n ' �
Dcpth to fret��ater in pit: � inches t=AC Neutral: yes no � Water-s:ainzd Lea�•es y no
Dc�th to saturaud soil: inches
Check all ahat apply &e�p�ain below�: O[hu(ezplain?:
Strcam,Lake or gage da[a:
Ac:ial hoto�raphs: Other:
VVetland h}�drolo��� present' ; '}•es I , no
Ra�ionale for decision/Remari:s: �j �
SOILS �
',qa� Unit '�ame Drainaoe Clr,ss �
�crics c� Ph:se)
Field obsen�ations cant�irm Yes �;o
� S�.Yonom� isuboroup) ma ..d tv�e?
; Profile Descrip�on
Irr_p[h Horizon tv�latrix col�r ' '�So:tic colo:-s �ioctlt ��undance Texture, concr�tions. Dr���in� of:oil
iinches) il�4unse1l tMunsell sizc �£ contrast structure, ac. pr�filt
� moisU moist) tmatch d-_scription)
�—�� ^ ����`(��,.;.+ �"r..0 ---r,�� S � <�-
< <� � (��, .�:, 1 , �-,,�---1n
' 2S�.7U,.�-1�-�-�
�� �.�..�J,. �
I >
� �
I � ; �����
! � � �
� H}dric Soil Indicators: (check all tha: applv) �
� Histoso! h4atrix chroma <_ � w:�h mortl�s
I Histic Epipedon M� or�z Concretioas
' Sulfidic Odor Hieh Or�a.�ic Contcn: in Sur�acc L��•tr of Sand��Soi!s
Aqu�e M�isture R��ime OrQanic Strt�,kin� in 5and}• Soils �
� P.educinQ Conditions Listed on \acionaUL�cai H�dric S��ils Lict
� Gl�v�d or Lo�v-Chroma(=1 i r.',atri� Other(z.��lain in rcmarks?
� H�dric soi3s present:' res� no
F,a:;onal� for decision/Remarks��
�
i �
��
��`etland Determination {circle�
Hvdroph��tic ve_etacion present'' ,� no
Hydric soils present? ne Is the sarnplin� point ��s no
u'.tland h��drolo�v resent'' ` s nc ���ichin a we�land'
� RationaleJRemarks:
�
L .
?�OTES:
Re�zsed 4,'97
DATA FOR111 1 (Revised)
Routine Wetland Determination
(��'A State VVetland Delineafion Manual or
198? Cor s�'�'etland Delineation hsanual
Project�Site: ��;� ,.y� Date: 11 J�l O�
J-�% f
Applicantiowner.�_,���/ County:
State: �
Investi ator(s : �. � S;`T,R:
Do Normal Circumstances exist on the site? y s`, no Community ID:
Is tbe site significantly disturbed(atypical situation)? �-es � Transect ID: ���q/ �
Is the area a potential Problem Area^ yes no Plot ID: � ,
E �lanation of ari ical or roblem area: (' � �
VEGETATIOI� (For strata,indicate =cree;S= b;H=herb;- =vine) I
i
Dominani Plant S ecies Stratum 4%cover Tndieator pominaut Plant S ecies Stratum %cover Indicator
�P A 11�� � �U
�� ' � ^ /fl F
,
'�� ' G�-u.-c.�� t--I- u- c� ���1,
HYDROPHY'TIC VEGETATtON L'YDICATORS:
, 4%of dominants OBL,FACW,&FAC � V
Check all indicators that appiy&e�cplain below: � 'I
Visual observation of plant species growing in PhysiologicaUreproductive adaptations
areas of prolonged inundatioil�saturation Wetland plant database
Morphological adaptatioas Personal knowledge of regioual plant communities
� Technical Literature Other(ex lain)
Hydroph?�tic vegetation present? �es no
Rationale for decisioa�Remarks:
HY�ROLOGY
Is it the gowing season? yes � VJater Marks: yes n Sediment Deposits: ye o
( on
Based on: ��C��soil temp(record temp_� Drift Lines: yes no ' Drainage Patterns: yes o%
otber(ex lain)
Dept.of inundation: � inches Oxidized Root(live roo,i�; Loca]Soi]Survey: yes o
y. Channels<12 in.ves �nc►�
Depth to free water in pit: inches � FAC Neutral: yes n ' Water-stained Leaves yes o'
Depth to satwated soil: ''"" inches �! ,
Check all that apply&e�cplain below: Other(explain):
Stream,Lake or gage data:
Aeria] hoto a hs: Other:
Wetland hydrology present? yes no
Rationale for decision,�Remarks: '
�I
. ----__.__.____ __ I
� I�
so�s I
�I
Map L'nit Name Drainage Class
(Series & Phase)
Field observations confirm Yes No
Ta�:onomv (subgrou ) ma ed type? I
Profile Description
Depth Horizon h4atrix color Mottle colors Mottle abundance Texture, concretions, Drawing of soil
(inches) ('vlunsell (Munsell size� contrast structwe,etc. profile I
moist} moist) (match description)
f� -'� .L� ID 'j2� �-- ---- _�� ���...-,
,
r�
�..., � .�._ .�.�- I�Z.-.
, �,
Hv�1ric Soil Indicators: (check all that apply)
Histosol Matrix chroma<_2 with mottles
Histic Epipedon Mg or Fe Concretions
Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils
Aquic Moisture Regime Organic Streaking in Sandy Soils
Reducing Conditions Listed on NationaVLocal Hydric Soils List
Gleyed or Low-Chroma(=1 matrix Other(ex lain in remarks
Hydric soils present? yes o
Ra#ionale for decision'Remarks:
Wetland Determination(circle)
Hydrophyrtic vegetation present? yes /n_�\�
Hydric soils present? yes n � Is the sampling point yes no
Wetland hvdrolo � resent? ves no 1 within a wetland? ��
Rationale/Remarks:
NOTES:
Revised 4197
D.-�T:� FOR\1 1 jRtvised}
Rou�ne \�etland DeterZnination
(11.-� Staie tt etland Delineation !�lanua( or
1487 Co s «etland Delineation '�'Sanua!)
Pn.�jccL'Siic ,; Dait: -, �,,
�--��2� ��� �,�- ; '�,�
� �
i ' b � /, � ,
.A?pl i�anVow-n�r: �
County: / /
St�te �
� � ���,� �����
In�-;li�atorfsl: �~� . S;T,'�:
Do!�c��ma] Cirumstanccc txist on thc siic'' cs no Comrnunii� ID: , .
Is thc �itt si�niFcantl� di�tur�d (an ical situ�tion J.' vc� �no , � Trar.srct ID: ��/ l f�'J ,.
Ls �hc srea a poienti�l Probicm Area'P ��es i n' `n �� � � Plot ID: " `" — ! +✓
Ex�lan�tion of an• ical or :�blem arca: � 2� �'�`` � � �
`'EGETATION {For it:�[a, indicatc T=ircc: S =shrub: H =htrb: V = vinc)
Dominant Plan: Sp�:ics Strs�um 9, co�cr Indic�zor Demina�� Plant Saccics Stratum �: co�cr � lndicator
� �
� � t � �
', r U �. �dA-�S `l� ;.5�(� � i ; i
�' �
`J ` � � � �' n
�
� �_-. -- {� I
�`\ .. %� Y"���''�
( � 1 �� 1
, ':, S J �������;'
��� �
,�_ �:�;��.: J--�- � r�f'.��'
� �� �-
� :-t-� c.c,�r.:�"s �—}��" I �����
HYDROPHITIC�'EGE?ATIOti I�DIC�TORS:
� �o�doT:iaanrs 09L. rAC�•', �i F.�C /�
�
j Check �il indic�iors th�t appl}'g ��plain belo«: �
�_.____
iVisnal obscn�a:ion of plant socciu�ro���in�in Ph�-siol��icaUreproductiti•e adapta�ions
i arcac of p�olonsed inu��ationl,a�ur�tior. «'t�land plant database
� hS�rph�lo�i��I adaptations P�rsonal knowle�g:of re�ional planc commur.ities
Tr.nni:al Litznture Othcr{ct lain}
H�droph}�tic vegetation present� .es no -
, Ra:ionalc for dccisiorvRcmar4:s:
!
� .
HI'DROLOGY
s it tht grou iae sc:sor,° �•ts no 1�'ater Mark.s: ves �Yo Stdimznt Dzposits: .yes no
�)� �` on
�.s�d on:��'�� ' soil �emp(record temp i Drif[Lin�s: yes ,h�o Drains�e P�tterns: �•es no
otntr(ex lainl
Lr_pt.�of inundation: --� inchcs Oxidiud Root{�i��c root Local Soil Sun•e�-: ye no
�� ,y-� ,,�r Cnanntks<I2 in. vts no
I3cpth io free watet in pit: inchts V�-�" � FAC Ivcucral: yes o Water-stainzd Le���es ye no
th to saturatcd soil: `O_�inchcs j�-���
Chcck all that apply &explain bdow: Other(exp{ain):
Strram, Lakc or ga�c data:
Aerial hotoora hs: Other:
V4'edand h�-drolog.�• presenc? ��es no
Ra:ionale for decisionlRzmari:s: --
I CQIL.S
�
� ?.'a? L'ni� '�ame Drainage C;a�s �
cncs � Phase)
Field observa;ions confirm Yes Tlo I
�i��onom�� isub��oupl mapped tvpe".' I I
Profile Descripnon
�:pth � i�onzon I !�4a�rsx color '�9otclz cc�lo:s �lo�tl� abundance Texture, concretions, Dra���in; of soil
(inches) i {Munsell (Munsell size & contr�st structure, etc. profile
� moist) moistl (matcfi dcsc�ption)
�
� �� % -�� l��F ��� l�?`R ��� � 5
;
' � ± I
�
�
I H�dric Soil Indicatocs: (che�k all ;ha: aapl��l,
Histoso': :��Ia�r,x chroma _< ? with mott{es
Hisuc��ipeo�n M�or Fz Concmions
Sulfidic Odor HiQh Or�anic Content in Surfacc L��•er of Sand�� Soils
.�quic IvSoisture Re=im� Oroanic Streai:in� in Sand�� Soi!s
RCducinQ Condicions Listed on \acionaVLxal H�dric S��i1s Li�t
G{zvzd or Lo��-Chtom� �=11 rnatn� Othes ie� lain in rematksl
� H�-dric soiLs present? ��� no
Rationalt for decision,Remarks:
i
�;'etland Determination (circle)
Hvdroph.�tic v�Retation presenc' vc no
Hydn: soils przsent? yes o Is the samplinQ point �zs no-
W�tland ;��•droio�v resent'' ves no ��-ithin a wetland''
Rationa]elRemar4cs:
'�OTES:
• Fe�zsed 4,'97
DaT.-� F'OR,tI 1 i�R�vised�
Roubne �Vetland Determination
(«�.a State �i�etland Deiineaoo� Manual or
1587 Co s «etl�nd Delineation ?vianuall
pn.•;cct;�sicc: � �,^I Dait_ � ` /�4'
, ,
�' /� � `
� i /
�ppli:anVo�:i�r. �� ` County: �� ,
�� ' � �'r
� �i1i%` /'��' , �� �i� J-J
In�cs;i:�to:is;: (_- r S�'r�R:
Do!�c�rrnal Circums[anccc tzist on tnc si�c'' �e� no Communit� ID: .
is L�c �itc si�nificantl� di�turbc� (at�pi:�J situa:ior i.' ��cs ,� ,� � Tr�r,�cc; [D: J� l I
Is the zrea a poirnti�l P;oblem Arca' �•es C?���� Ploi ID: .y �� _.
E,;Dlan�tion o{an� ical or roblcm arca�
�'EGETATION (For strata. indit�te T= v�e: S = shrub: H =ht-b: �'_��ne)
Dominani P!ant S :cics Str�cum �• co�a Indicac�r C�or�ir.anc Plant S�ccics Str��Lm 9c co�er Indi�ator
, . _ ��,_.�- T� �� ��..- I
�
.�-rn ��-�',. �' � �.w� ;
K.l�--U�-c�t.. !`�YYr� �� v � �
� . ` � ;
,, �
( I
H1�ROPFi1TIC �'EGETATIO'� ItiDIC�TORS:
�'�of dor-iinans OBL. F.�C�',b F.�C �V�✓
Check ail indica�ors �ha� appl� 8:. cxpl�in beio«�: "
Visuai obscr�-ation of plarn soc:ics�ro��in: in Ph�-sioio�icaUreproductiti•c adaptations
arcas of proloased inundatioN>�turation «�ttland plan;da:abas:
Tvf�rpholosica! adaotation� P�rsona! kn�wlcd�c of rc�i�nal plam commcr.iiics
Tr.hnical Literacure Ochcr(ex lain)
H�-droph�•tic vegetation present7 es no •
Ra�ionale for occisior�'Remarl:s:
H1'DROLOG�'
1;it thc gro�in� scason'' �es �� �'aies Mar►s: �es .�h Scc�imtnt Dzposits: yes �no
1�� t--� an
Based onC�-�-��� soil �zmp tre:ord �emp ) Drift Lines: ycs o Dr�ina_=e P:,�tcrns: ,•es o
o:htr(ex lainl
IY_�I.�Of inund�tion: �'— �nches Oxidi2cd Root(fi�•e roo Loca? So.il Surv���: yes o
�"1n �a-�, , Channels<12 in. ��:s '
Depth to fr�z ��ater in pit: "^ inchts ��11 �AC Neutral: yes no �vater-stainzd L.ea��es ycs no
D�th to satur��ed soil_ —inches
Check all tha[ apply& e�p:ain belo�•: O�hu(ex.plain):
S�rcam, Lakc or ga�c da�a:
Aerial ho[o�ra�hs� Other:
R'ttland h�-drolog� present' }'es no
Rationale for dccisionlKemarl:s: i
)nit :�arne Drainase CI:ss
;s 8: Phase) �
Field obsen��tions cozfirm Yes No I
�T2zonon,�� lsub�roupl r:-►apped :ype"'
Profile Descrip0on
Ikpth ' Hor,zon '�4acnx color !�lottiz color� �ior,iz ahundance Texture, conctttionc. Dr���inR of�oil
iinches) � ; (Munsell (Mun�elf size � con[rst structure. etc. profi3r
� moist) motst) (match dcscription)
I � ��% � � �'���Z3�' � ;��
S�1t � �� � 3 � S
�
� I �" � ��`, ,
/
� _
I
f �
� Ii
I fl�dric Soil Indicators: (chcck a11 that appl�)
! Histosol Matsix chroma <_? wiih mottizs
iHisuc Epiaedon M�or Fe Concrctior.s
� Sulfidic Odar Hi�h OrQanic Contcnt in SuRacc L���er of Sand�� Soils
,�ouic ti1ois.ure Regimz Oraanic Str�akin� ir�Sand�� SoilS ;
� Rtducir.Q Conditions Listed on \acionaVLa.al H�dric Soils Li�c
Glevtd or Lo«-Chroma (=1� ma[rix Other ie.� lain in remar�;s?
H�dric soiLs present? ��es 'no �
Rationalz for decisionlRemarks:
«'etland Determination (circle)
Hvdroph�tic vt�etation prtsent? vc no
Hydric soils prrsent? yes ,� l Is the sampling point �es �
K'�t4and h�:droioRv resent? ves o ��'ithin � wetfand`'
Rationai erRemarks:
( .
?�OTES:
Revised 4/97
D.-�T.-� FOR\1 1 (Rct-isea)
Routine \�'etland Determination
t«.a State «etland DcIineaflon Manual or
1487 Co s «�etland Detineation?�4anuall
�;jccL�Siic: � � _ ,'� ��J Latt: � j �
`"7 % /` �.�.
���� ��f.�-�� r i `'
Appii��nVouTtr �,`��� County: ,
Statc: ;--��—�,
Q� S�T,R: � vt--C�� �-%
I in�:sti�_a[orisl �'�GU� .
I Ue!�c,rmal Cirumsi�nce�tzis: or.thz sitc'' �t� � no Communii�• ID� , .
� s thc si[e si�nificarnlv di��urbc� (a�,pical situ��ionti".' yts o�, Transtct ID: �� `� _, ,
Is ihc Zrea a potrnti�l Pro'�lem Area' ��s no� (� Pio� ID: •
�
�zclan�ti�r, o,`a�• ical or problcm arca: � IJ ,
; �"EGET.aTIOti (For str-�;a, indi�ate T=vee: S = sh:ub: H =hzrb; 4'_ �inc)
�
Do:ninant P'ant S ccics Str�tum 9c co�cr Indic�tor pomir.an; Piant S�c�ics Str��urr �ic co�•tr Indi�ator
__ -� � � 1
,� � ��
�� � '�j�_��A i
� �
,' � �� , � ` �
1 I � �� ��
i <u-��. ,' iJ� � ��.c-� 9 �
I ,, � '
� � j
I
H1`DROPfi1TIC �'EGETATIO'ti I\DICaTORS:
2 of dominanu OSL. F.�,C�',b F.1C (�� '
Cht�l; 3!I indica:ors that�ppi}• g cxplain bcio��:
Visual obsen�tior. of pisnt s�ci�s�ro�L�ir.� in Phvsioln�ieaUreproducti�•e adapta�ions
a;��� of proionoed inun�ation,':�iu:stior 1�'ztland plant da.abase
;�4o�hoiogirl adapzacions Fzrsonal knowiedge of re�ionai p;ant commur.ities
Tcchnical Litzraturr Othcr{cx lain?
Ht'droph}2ic vegetation present? ��es no
F.a:ionaic for dccisionlRcmari;s:
i
HZ`DROLOG�i'
fs it tnt gro��inQ sc�son' �es no �'ater Marl;s: vcs o Szdiment Dtposits: yes no.
on
But� on: soil �zmp�record temp ) Drift Lines; �•es no Drains�_e Panerns: ves n�
othtr;ex lainl
Ik�c.�of inundacion: � inches Oxidized Root(1i��e root Local Soif Surve�: yes n�
/`��,' �,� n Chann�ls<32 in. ves n
Dcpth ro fret u•ater in pi[: � inches / �'J r"`� FAC Nwiral: yes no Wai�r-stained l,ea��es yc no
th to saturatcd soii: �—. inchts
Chcck all that apply & explair bclow�: O[hcr(ezplain):
Stream,Lakt or ga�c da�a:
A�r.al hoto�ra tu' Other.
Wcdand h�-droiog.�� present'. ti•es no
Rationale for dccision/Remarks:
SOILS
�-�ap Uni: '���e DrainaQe Gass �;
crics g Phase) �
t=ieid observations confirm Yes �To
TaConom�� isuC�:ou ) ma d tv e'
► Profile Descripflon ',
�pth Hor,zon Matrix color '�lottle color �1oct1� aoundance ' i exture, eoncretion�. Dra��in� of coil ',
(inches) (Munsell (Munsell size g contrast structure, cu. profik I
mois;) meist) lmatch deccria[ionl �i
i�_-, ' — — �
;� `�"
` I
:_;�' , � ��� 3 � r��-a�,
I
1 � I
:
,
� � �
H}�dric Soi1 Indicators: (chcck ali tha:aap}v)
Histosol Matrix chroma <_ ? witn mottt�s
� Hisuc EDi�edon '�4g or r� Conc:-etior.s
� Sulfidic Odo: Hieh Or�anic Contcnt in Surfacc L���cr of Sand�� Soils
� r�quic Moistur Rc�im� Or�anic Strtakina in Sand}' Soits
I Rtducina Con�itions Listed on \ationaULocal H}dric Soils Li�t
� Glevtd or Lot�-Chrom:: �=1 i matri� Other iz�n;ain in remarks)
�� H�-dric soiLs present.' �•es o �
I Ra:ionale for decision/Remarks:
�
�
� «'etland Determination (cir�le)
I
I� Hyd;oph��tic vt�etation present? ycs no
� Hydric soils present? yes Is the sampling point .es no
' �'z[land h�•drolo�v resent^ ves �t•ithin � wetland''
R.ationaleJRemarks:
,
, ,
tiOTES:
Revised 4/91
;4,�'PENDI?C 2
���'�TI�PeND t"Z,�TIIy� FOR.iVt — V✓ES�N �VfOSHI?�IGTON ''
(DRAFT — .A[�IGLIST 2004` '
Pa�e 11
�'�'ETLAND RATL'�1G FOR1�T— W�STERN `'�'ASHINGTO'�
,�; � ` -f
, � � -. ; '
Name of wetland(if I:nown): ! ��Ui.2t_�;t �-- ( LA%i�% /�J �} �-i�? a` �-�-��
�
Location: SEC: _TWNSHP: _RNGE: _(attach map with outline of wetland to ratir,g form)
Person(sl Rating`�'e.tland: ��a� Affiliation: '��'✓�S Date of site visit: ���5/6 �
���..��� ���`�'��.��� �� �.����
�:�tegQ�-�- �i�s�a on ��C�'��I�S pro�-ic�ee� b�' ���etland
I � �I �'
Score for��-ater Quality Functions i �
Caie��ory I= Score. ��0
Cate�ory II= Scare 51-69 Score for Hydrologic Functio�ls � �
CateQon�ll1 = Score 30-50 Score for Habitai Functions �(j
CaieEory TV = ticare < 70 TO'�r�L score for fuuctions i
� �
�'atebory b�s�cd on SP�CI.A�. �'��R_.�CT'E�S�ICS of��etlandl
I II �oes no� :�ppl�� I
��a� C'��egor�� ��li�os� tt�e "�ig�est" categor-�� from ai�ove) � ',
Check the appropriate t��e and class of v��etland being rated.
ri ,� +�a ,_ ;z ..-�, r'i$> ,a:, 5 -� � .,�,.� ,�,�. _ ;�w
� 81k�%' `" s„�.-''. '� . `'m� .�� f A�< �t ,:
t .Y...
Estvarine ~De ressional
Natural Herita e �'�'etland Riverine
Bo Lake-frin e
�Zature Forest � Slo e
Old Growth Forest Flats
Coastal La oon Freshwater Tidal
Interdunal
None of the above
Wetland Rating Form—westem Washington _ 1 August 2004
Does the wetlaud being rated meet any of the criteria below?
It tiou ansvver�'E� to anv of the quections beiow you�vill need to prote.ct t��e. �.�etlai_e�
according to the re.gulations regarding the special characte.ristics found in the���etland.
- - --
_ Cl�eck List fc�r «'etlands Tl�at �eed S�ecial Protection, ai�d YE�'V�
Tliat _�r-e ;�t�t Inctucled in tl�e Ratin� ;
��� 5�1. HQS Zl2c 19'c'Ull'1LT hfE72 cxUC21Y77e?2teCl LIS Q I;i:Cit.�I J07" Q7,L t'Eu'P �i!1% 1�1S.e�2 �
! Threatened or Endanoered pinr:t or aninzal spec�es /TiE cpec:esi"
; For the.purposes of this ratin� s�-stem, "docume.nted" means the wetland is on t'.�e V
` appropriate state or federal database. '
SP2. Has the �vetland been documented as hatiitat ior any�state listed Thr�ealened or
Enda��gered�Ianr or arzimal sr»ecies?
V�
For t�'�e purposes of this ratulg s�-stem, "documented" ineans 1:he wetland is on the
appropriaie state database. �
SP3. Does the wetland contain individuals of Priorzty species listed by the YVDF�T
for the state? � �' �
�
` SP4. Does the ia;elland have a Ioca1 significance in additio�T to its_furzctioi�c`? �or �
e.xarnple,the wetland has been identified in ihe. Shoreline Master Program, t.'
the Critica� Areas Ordinance, or in a locai manageinent plan as ha��ing ' �
, ;
� �pecial si�nificance. �
To complere tl�e r�ext pas-t of the data sheet ��ou 1ti-ill f�eed to deter•f�zine ti�e
Hydropeomorphic Class o��the wetland being rated.
The hydrogeomorphic classification groups �-etlands into those that function in similar u�ays. This I
siinplifies the questions needed to answer how well the wetland functions. The Hydrogeomoiph�c
Class of a wetland can be detennined usuig the key Uelow. See p. 24 far more detailed ir�structions
on classifying wetlailds.
Wetiand Rating Form—westem Waslrington 2 Aub st 2044
�
Classificatiov of�'egetated «'etlands for V4'estern Washington
Wetiand Name: Date:
1. Ar i v�-ater levels in the wetland usually controlled by tides `i.e. except during f]oods)^
'0 go to 2 YES—the wetland class is Tidal Fringe
If yes,is the salinity of the water during periods of annual low flov��below 0.5 ppt (parts per
thousandl? YES—Freshwater Tidal Fringe NO—Salh;°ater Tidal Fringe (�stuarine)
If your wetiand can oe class�ied as a Fresh�rater Tidai rringe use the forms_for Riveri�ie
���etlands. If it is Salt�vater Tidal Fringe it is i•aied as m�Estuarine�vetland. �T�'etlands that
were called estuarine in the iust and second editions of the rating system are called Salt
iWater Tidal Fringe in the Hydrogeomorphic Classification. Estuarine wetlands were
categorized separately in the earlier editions, and this separation is being kept in this
revision. To maintain consistency bet��veen editions,the term"Estuarine" wetland is kept.
Please note,ho«-e�-er, that the characteristics that define Categor� I and II estuarine
wetlands have changed (see p. }.
�. Is the topography vvitllin tl�nd flat and precipitation is only source (>90%) of���ater to it.
I�u — go to 3 Y�S The wetland class is Tlats
If your wetland can be classified as a "Flats" wetland, use the foim for Depressional
«�etlands.
3. Does the wetland meet both of the following criteria?
_The vegetated part of the wetland ;s on tl�e shores of a body of open water (witiiout any
�e.�etation on the surface i ��rhere at least 20 acres (8 ha) are perman.entiy inundated
(ponded or flooded);
At 'east 30°�0 of the open water area is deeper than C.6 ft (2 m)?
NO—go to 4 ��S—The wetland class is Lake-fringe (Lacustrine Fringe.)
4. Does the ��etland meet all of the following criteria?
The wetlar.d is on a slope (slope can be ve�y gradua�,
The waier flows through the wetland in one direction(unidirectional) and usually
comes from seeps. It may flow subsurface, as sheetflov��, or in a svvale without distinct
L�anks.
The water leaves the wetland without being impounded'?
I`OTE: Surface water does not pond in these type o�f�veilands except occasionallv in
1:ery small and shallorv depressions or behind hummoclrs{depressions are usually
<3ft diameter and less than 1 foot deepj.
I�TO - go to � YE.5—The wetland class is Slope
5. Is dle v�retland in a valley, or stream channel, where it gets inundated by overbank flooding from
that stream or river? The flooding should occur at least once every i�vo years, on the average,to
answer "yes." The wetland can contain depressions that are fzlled ti��ith��ater��hen the river is
not floocling.
NO - go to 6 �'ES—The wetland class is Riverine
ti��etland Rat�ng Form—�°e�stcrn�'�asl,in�ton . August 2�?04
6. ls the wetland in a topographic depression in which water ponds, or is saturated to the surface, at
some fime ofthe tieai. T,Jzis means that ar.y outlet, ijpreser,t; is hiaher tMan the interior ofthe
rnetland.
NO —go to ? Y`�S —The wetland class is Depressional
?. Is the wetland located in a very flat area«�ith no obvious depression and no stream or river �
ruruling through it and providing water. Tl�e wetland seeins to be maintained by high
�roundu�ater in the area. The��etland may be ditched, but has no obvious natural outlet.
NO — go to 8 ��S—The wetland ciass is Depressional
8. Your wetland seems io be difficult to classify. For example, seeps at the base of a slope may
grade into a riverine floodplain, or a small stream within a depressional ��etland has a zone of
flooding along its sides. Sometiines we fmd characteristics of seve.ral different l�ydrogeomorphic �
classes within one «�etland boundary. Use the following table to identify the appropr;ate class to
use for the rating systein if you have several HGM classes present ti-ithin your v�-etland. NOTE: 'i
Use this table only if the class that is iecornmended in the second column represents 10°ro or more
of tiie total area of the w�etland being rated. If the area of the second class is less than 10°o classify
the wetland using the first class.
� 'I�G,�:�la��es ,YT���3z�z.n������cited���n�d.�ounc�c�� .�_�����,���Class,ta,��'s��;�rz R��r1��� ".�...``-'
, Slope+Riverine Ri�-erine
I Slope�Depressional Depressional �
� Slope +Lake-fi-inge Lake-fringe
j Depressional —Rive.rine aiong stream within �oundary Depressional
Depressional + L.ake-fringe Depressional
' Salt Vdater Tidal Fringe and any other class of freshwater T;�eat as ESTL?ARL�IE under
�I ��•etland ��etlands with special
i charac.teristics
if you are unable still to determine which of the above criteria apply to your wetland, or 5-ou have
more tlian 2 HGM classes within a wetland boundary, classif}�the v�-etland as Depressioual for
the rati��g.
..'�tlan��.�tint rurm—���rstPrn'��:ashin�[on a �ueust 2004
j�._:y.�I)ePiessicr��al and Flats:ti'�'etlands �= � .,: � ,� _ :� Pa�nts�,�__:
. � ; . ,. _ - a �. - _
` ��'.�"I��R.Qt�:�LIT��FIJtiCTIC);�S - Indicat��rs that i�,�etland functions to.iruproti-e �
i «ater���31it�- - -
� � D ]. Uoe� t}�e �+��tland ha�e the potential to impro�e n�ater quality? (see p. 38i
D 1.I Characteristics of surface water flows out of the wetland:
D V4 etland is a depression with no surface water outlet points = z
VVetland has an inte.�nirtently�flowing, or higJily constricted, outlet points �
«'e.tland has an unconstricted surface outlet points = 1
�T�'etland is flat and has no obvious outlet and;'or outlet is a ditch points = 1
' D 1.2 The soil 2 inches below the surface is clay, orgariic, or smells anoxic
D (hydrogen sulfide or rotten eggs).
��S points�
iv0 oints = 0
D 1.3 Characteristics of persistent vegetation(emergent, shrub, andior forest class):
D Wetland has persistent,ungcazed, vegetation> = 95% of area points�
Wetland has persistent, ungrazed,vegetation> = 1,'2 of area points �
�T�%etland has persistent,ungrazed`-egetation>= 1/10 of area points= 1
V�'etland has persistent, ungrazed vegetation<1/10 of area poir.ts= 0
D1.4 Characteristics of seasonal ponding or inundation.
D This is the area of the wetland that is ponded_for ar least 2 months, but dries out
sometime during the year. Do not count the area that is permanently ponded.
Estimate area as the average condition 5 out of 10 yrs.
Area seasonally ponded is> i/2 tota] area of wetland points =�
Area seasonally ponded is> 1/4 total area of wetland points= 2
Area seasonalh�ponc3ed is< 1/4 total area of�;�etland points = 0
NOTE: See texi for indicators o,f seasonal and permanent inundation..
D Total for D 1 Add the points in the boxes above � �
D D 2. Does the wetland have the opportunity to improve water quality? (see p. 49)
Answer YES if you know or believe there are pollutants in groundwater or surface �
� water coming into the wetland that would otherwise reduce v��ater quality in
i streams, lakes or groundwater downgradient from The wetland?h'ote which of the
followin condiiions provide the sources of pollutar,ts.
�azing in the wetland or within 150$
� Untreated stormwater discharges to wetland
— Tilled fields or orchards within 1 SO ft of wetland
— A stream or culvert dischazges into wetland that drains developed areas,
reszdential areas, farmed fields, roads,or clear-cut loeging
— Residential, urban areas, goif courses are within 150 ft of wetland multiplier
— Wetland is fed by groundwater high in phosphorus or nitrogen �
Other
YES multi lier is 2 NO multiplier is 1 �
D TOT.4L -Water Quality Functions Rlultiply the score from Dl by D2 ��
Add score to table on . 1
VVetland Rating Foim—westem R�ashington S August 2004
I j� ' De�ressional and Fla�s ��Etlauds _ a _ � ; ��- j ;� ` , � � P��nts
l- sG .:. ,' _ ,.� ' � r` ,c � ..:� `�,�"�y�o3 s.�-.i,,,,-'t9 �' ,a�.-..
�a �a�'� a�.�_.. u, d.. '3, :� >"7' ;d`�``-.i.s'.e .`'i .r'»� t' i7,e;- 3'i"'t� .a�E<t- n.,.._.i�� o>:.�.
.. sr �k�e,*,,.
,,� . . ,. .-,�-n��.��, -L. . �.sf.+. .>•-' .:> -�., ..v a,,.� , ,. e . .. ; �.. _
- � ' . . ._� . . -,.._� -
-..
=:`. H��ROLOGIC r�C,'NCTIONS - Ind_icaiors ti�at v�etiand functions to ze�uce : , �.
, '.;'flonciin� aiid streain deRiadat�on - -
` ll 3. Does the ��etland ha��e the potenriai to reduce floodina and erosion^ �
(see . 46 �� ��'
D D 3.1 Characteristics ot surface water flows out of the wetland
Wetland has no surface water outlet points =4
�T�%etland has an intemuttentl��flow�ing, or highly constricted, outlet points– 2�
�'�'etland is flat and has no obvious outlet and.%or flutiet is a small ditch points –
W'etland has an unconstricted surface outlet points = 0 �
D D 3.2 Depth of storage during wet periods
Estimate the height of ponding above the bottom o{the outlet
Marks of ponding are 3 ft or more above the surface points = 7
The wetland is a "head«�ater"wetland" poiuts = 5
I��arks of ponding betvveen� fr to<3 ft from surface points –
Marks are at least 0.5 ft to <2 ft from surface poinfs �
VY'etland is flat but has small depressions on the surface that trap water points = 1 �
Marks of ponding less than 0.5 ft points = 0 �i ,
D D 3.3 Contribution of wetland to storage in the w atersbed
Estimate the ratio oj the area of upsiream basirz contributing surface water to the
�� w�etland to the area of the wetland itself. i
� The area of the basin is less than 10 times the area of wetland points = 5
� The area of the basin is 10 to 100 times the area of the wetland points .�3
j The area of the basin is more than 100 times the area of the wetland points– �
Vl'etland is in the FLATS class (basin =the wetland, by definition) points =5 �
D Total for D 3 .Add the points in the boxes above (�
D D 4.Does the wetland ha��e the opPortunitv to reduce flooding and erosion?
(see p. 49)
Answer YES if the we#land is in a location in the watershed where the flood
storage, or reduction in water velocity, it provides helps protect downstream
property and aquatic resources from flooding or excessive andlor erosive flows.
� Answer NO if the water coining into the wetland is controlled by a structure such
� as flood gate,tide gate, flap vah�e,reservoir etc. OR you estimate that more than
� 90% of the water in the wetland is from groundwater.
� hTote which of the following indicators of opportunity apply.
� �etland is in a headwater of a river or stream that has flooding problems
' =' Wetland drains to a river or stream that has flooding problems multiplier
— Wetland has no outlet and impounds surface runoff vvater that might
otherwise flow into a river or stream that has flooding problems �
ther
�'E multiplier is 2 NO multi lier is 1
D TOTAL -Hydrologie Functions Multiply the score from D 3 by D 4 .
Add score to table on p. 1 � 1��
'J�etlard Ratine Form—�vestem VJzshington 6 Augnst''U0�
�i
i �
-5-`'' ,.ss. ` �' �Fx. ; u �;r�'fi��4IIltS ,_�
� TIi�°s� u�Strons ap�ul3 ta H�etlt�r�rls of ril11�G1'��clrrsses : �
.
_ � �? ,
. _.. ., w,_ . � . � . :, r_ � .: _. .�� r�§ ._ .�� _. .� �.�-�
_-� . . . � ' .,.
.I-3�31TAT FL���CTI��NS =Tndicatars that«etland fiuicli�ns to proti�ide in��ortant hahitat
.,: �: '
, _ __ :
H ]. Uoes the �s�etland l�a�e the potential to pro�ide babitat for man�� species:'
__ _ ,_ . _
H 1.1 Vegetation structure (see p. '?j
Check the tipes oj�vegetation classes present (as defned by Cowardin) ii tlie class
covers nsore than 1 D°%� of the area o{the tivetland or ?/, acre. I
'Aquatic bed
�Emergent plants
�Scrub�'shrub (areas where shrubs have >30% cover}
Forested(areas���here trees have >30% cover)
Forested areas have 3 out of 5 strata(canopy;sub-canopy, shrubs,herbaceous,
mossiground-cover j I
Add the number ofvegetation ttipes that qualifi�. Ifyou have:
� 4 types or more points =4
� 3 types points— �
2 types points� '
1 type points =0
H 1.2. Hvdroperiods (see p. 73)
Check 1he types of water regimes (hydroperiods)present within the wetland. The
water regime has to cover more than 10% o�the weiland or 'i< acre to count. (see text
.for descripcions of hydroperiods)
�PermanentlS� flooded or inundated 4 or more t}�pes present points= 3 �
�Seasonall5 flooded or inundated 3 tt-pes present points� ;
�Occasionally flooded or inundated 2 types present point= 1 1
Saturated only
Permanently flowing stream or river in, or adjacent to,the wetland �
Seasonally flowing stream in, or adjacent to;the wetland " . a
Lake fringe wetlanrl =2 points �- '
Freshwater tidal wetland=2 points �
H 1.3. Richness of Plant Species (see p. 75) i
Count the number of plant species in the w�etland fhat cover at least 10 ft�. (d�erent �
palches of the same species can be combined to meet the size threshold�
You do not have to name the species.
Do not include Eurasian �l�filjoil, reed canarygrass,purple loosestrife, Canadian �
Thislle I
If you counted: > 19 species points =2 �
List species below if you tivant to: 5 - 19 species points �1 i
<5 species points =0 �
1 '
�
Wetland Ratine Form—westem���ashington 13 Aueust 2004
1'
H 1.4. Interspersion of habitats(see p. '6)
Decide from the diagrams belo����-hether interspersion betureen types of vegetation
(described in H 1.1), or vegetation ty�pes and unvegetated areas (can include open
water or mudflats} is high,medium,lo��-, or none.
- �� _
�� �
- ',
(� -� - '
: _.._ ,; �% �
'_�one= 0 points Lo�i� _ : ����int '�Io,��rate =2 po�.t�
� F� '\� n„ �P�� . ��
' `� .,�-"'���.���� ��:��4...
� , = "_ �. t,.,�.
1 ��
/� f _ � :� ���,�`:
; _ ,
_ % t � �'���+i��' i
�;� �' t< 1
� sf —
�� [riparian braided channe]s]
High =3 points
NOTE: LF you have four or more vegetation t�-pes or three.vegetation types �'
and open u�ater the rating is always "�igh". ±
H 1.5. Special Habitat Features: (see p. 77)
Check the habitat features that are present in the wetland. The number of checks is
the number ofpoints you put into the next column.
Large, dow-ned, «�oody debris w�itkin the wetland(>4in. diameter and 6 ft long).
Standing snags (diameter at the bottotn> 4 inches) in the wetland
Undercut banks are present for at Ieast 6.6 ft (2m) and:'or overhanging vegetation
extends at least 3.3 ft(lm)o�-er a stream for at.least 33 ft (IOm)
Stable steep banks of fine material that might be used by beaver or muskrat for
nning (>3Qdegree slope) OR signs of recent beaver activity are present �
At least I/4 acre of thin-stemmed persistent��egetation or woody branches are present
in areas that are permanentty or seasonall�inundated(structures for egg-laying by
amphibians) �
Invasive plants cover less than 25% of the wetland area in each stratum of plants
H 1. TOTAL Score - potentia] for providing habitat �
�4dd the scores in the column above
Comments
VJetland Rating Foim—westem Vv`ashington 14 August 2004
H 2. Does the��etland have tt�e opportunity to pro��de habitat for many species? =
� H 2.1 Buffers (see p. 80)
� Choose the description that best repre,sen2.c condition of buffer ofwetland. The highest
scoring criterion that applies to the tinetland is to be used in the rating. See tezt for
defrnition of`�undisturbed."
— 100 m (330ft) of relatively undisttu-bed vegetated areas, rocky areas, or open water
>95°�0 of circumference. No developed areas with.in undisturbed part of buffer.
(relati�el,y undisturbed also means no-grazing) Points= 5
— 100 m (330 fr) of relatively undisturbed vegetated azeas, rockv areas,or open water
� >50°�o circumference. Points = 4
— 50 m (170i�)of relatively undisturbed ��egetated areas, rocky areas, or open water
>95°% circumference. Points = 4
— 100 m (330ft) of relativel��undisturbed��egetated areas,rocky areas, or open water
>25°% circumference, . Points = 3
— 50 m (170f�1 of relati�c�el<<undisturbed vegetated areas, rocky areas, or open water
for> 50% circumference. Points = 3
If buf�'er does not meet anv of the criteria above
— No pa�-ed areas (except paved trails) or buildings «�ithin 25 m(80ft) of wetland>
95°�o circumference. Light to moderate grazing, or lawns are OK. PoiQts = 2
— No paved areas o�buildings within 50m of��etland for>50°'o circumference.
L' t to moderate grazing,or law-ns are OK. Points = 2
— ea�ry grazing in buffer. Points = 1
�- Vegetated buffers are <2m«-ide (6.6ft) for more than 95% of the cucumference �
� (e.g. tilled fields,paving, basalt bedrock extend to edge of wetland Points = 0.
— Buffer does not meet any of the criteria above. Points = 1 �
H 22 Corridors and Coruiections (see p. 8I)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor (either riparian or upland)that is at least 150 ft wide,has at least 30% cover
of shrubs, forest or native undisturbed prai�ie,that connects to estuaries, other
wetlands or undisturbed uplands that are at least 250 acres in size? (dams in riparian
corridors, heavily used gr�avel roads,paved roads, are considered breaks in the
corridor).
YES = 4 points (go ro H2.3) NO=go to H 22.2
H 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor(either riparian or upland)that is at ]east 50$wide,has at least 30% cover of
shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands
that are at]east 25 acres in size? OR a Lake-fringe wetland, if it does not have an
undisturbed corridor as in the question above?
YES =2 points (go to H2.3) NO=H 2.2.3
H 2.2.3 Is the wetland:
within 5 mi (8krn) of a brackish or salt water estuary-OR
within 3 mi of a large field or pasture(>40 acres) OR �
within 1 mi of a lake greater than 20 acres?
YES = 1 point O 0 oints
Wetland Rating Form—westem Washington 1� August 2004
IH 2.3 Near or adiacent to other priorit�-habitats listed by Vti�FVV (see p. 82) I
«-'lvch of the following priority habitats are within 330ft (100m) of the wetland? I
isee text ior a more detailed description o{these prioriry habitats) I
Riparian: The area adjacent to aquatic systems �-ith flowing w�ater that contains
elements of both aquatic and terrestnal ecos}�stems v��hich mutually influence each other.
Aspen Stands: Pure or mixed stands of aspen greater than 0.8 ha (2 acres).
Clif�'s: Crreater than 7.6 m (�5 ft)high and occurring below 5000 ft.
�
Old-growth forests: {Old-�a-owrth«�est of Cascade crestl Stands of at least 2 tree
species, fornvng a multi-layered canopy� with occasional small openings;with at
least 20 trees;lia(8 treeslacre)> 81 cm (32 in) dbh or> 200 years of age.
Mature forests: Stands «�ith average diar,�eters exceeding 5� cm (21 in) dbh; crovvn �
cover may be less that 100%; cro�j� cover may be less that 100°'0; decay,
� decadence.,numbers of snags, and quantity of large downed material is generally
less than that found in old-growth; 80 - 200 years old west ot the Cascade crest.
Prairies: Relatively undisturbed areas (as indicated by doininance of native plants) �
where grasses and�or forbs form the natural climax plant community. i
Talus: Homogenous areas of rock rubble ranging in average size U.15 - 2.0 m(0.5 -
� 6.� $), composed of basalt, andesite, and'or sedimentary rock, including riprap
� slides and mine tailings. May be associated ��ith cliffs.
Caves: A naturall}� occurring cavity,recess, void, or system of interconnected
passages
Oregon w�hite Oak: Woodlands Stands of pure oak or oak%conifer associations �
' where canop}- coverage of the oak component of the stand is �5°o. �
Urban Natural Opeu Space: A priority species resides ��ithin or is adjacent to the
open space and uses it for breeding andlor regular feeding; and;br the open space
I fiu�ctions as a corridor connecting other priority habitats, especially those that
would otherwise be isolated; andior the open space is an isolated remnant of natural
habitat larger than 4 ha(.10 acres)and is surrounded by urban development.
�stuary/Estuary-like: Deepv��ater tidal habitats and adjacent tidal wetlands, usuali}r
semi-enclosed by land but with open,partly obstructed or sporadic access to the
open ocean, and in which ocean water is at least occasionalh�diluted by freshwater
runoff from the land. The salinity may be periodically increased above that of the
� open ocean by evaporation. Along some low-energy coastlines there is appreciable
dilution of sea water. Estuarine habitat extends upstream and landw�ard to where
' ocean-derived salts measure less than 0.5ppt. during the period of average annual
low flow. Includes both estuaries and lagoons.
Niarine/Estuarine Shorelines: Shorelines include the interiidal and subtidal zones
of beaches, and may also include the backshore and adjacent components of the
terrestrial landscape (e.g.; cliffs, snags,mature trees, du.nes,meadows)that are
important to shoreline associated fish and v��ildlife and that contribute to shoreline
; function(e.g., sand/rock/log recruitment,nutrient contribution, erosion control).
If wetland has 3 or more. priority habitats =4 points
� If wetland has 2 prioriry habitats=3 points
�' If we2land has 1 priority habitat= 1 point I��o babitats =0 points � i
�h�etland Rarine Forn—wes:�er-n Washington 16 August 2U04
' H "�.4 ��'etland Landscape rchoose t�ie one drscripiivn ol�the la��c�s�ape �zround the j
wetland that best fils) (see p. 84)
; There are at Ieast 3 other«�etlands vvithin 12 mile. and the connections betw�een them
;� are relati�-ely undisturbed (light grazing be,t«�een cvetlands OK, as is lake shore with
'� some boating, but conr�ections should NOT be bisected by paved roads, fill, fields,
or other de��elopment. points = 5 •
The wetland is Lake-fringe on a lake with little dis�urbance and there are 3 other lake-
fringe wetlands within 1'z mile points=5
There are at]east 3 other vvetlands within 'iz mile, BL�the co�ections ben�een tt�n
are disturbed points�
The wetland is Lake-fringe on a lake w-it� disturbance and there are � other lake-
fringe�retland within 1�mile points =3
There is at least 1 v��etland urithin liz mile. points=2
There are no�vetlands within'..% mile. points = 0 �
�
H 2. TOTAL. Score - opportunit�for providing habitat
� Add the scores in the column above � I
! Total Scorc for Habitat Functions — add the points for H 1,H �' and record the result on
p. l l ✓
����t1an�Ratine��orm—western�Vashington . �ugust?004
CATEGORIZATION BASED ON SPECL4L C�LARACTERISTICS
Please defermine if the »�etlarrd rneets the attributes described below and circle the
appr•opriate answers and Category.
� ��'etland T��pe , 1 _.r; .Categor�
, C11��ck o17 ar1�.�c°r�ite�ia'�Iu�f�ippli-tti rhe u�E�larirl.� Czrcle'tl�e rrppropriute.Cnt��,�or1'„ .. ; ,
; �tis�fietz tjr��a i�o r�<<�te'et•itericl af-e�triet � � . � -
SC 1.0 Estuarine wetlands {see p. 86/ �
Does the wetland meet the following criteria for Estuarine wetlands?
— The dominant��vater regime is tidal,
— Vegetated, and _
— With a salinity greater than 0.� ppt. =
�'ES = Go to SC l.l NO
SC 1.1 Is the ��etland���ithin a National V�'ildlife Refuge,National Park,
National Estuary Resen-e,Natural Area Preserve, State Park or Educational, Cat. I
Environmental,or Scientific Reserve designated under�'�'AC 332-30-151?
YES = Category I NO go to SC 1.2 �
SC 1.2 Is the ��vetland at least 1 acre in size and meets at least tu-o of the i
�
following three conditions? YES =Category I NO= Category II , Cat. I
—The wetland is relatively undisturbed (has no diking, ditching, filling, � Cat. II
cultiti-ation, grazing, and has less than 10% cover of non-native plant
species. If the non-native Spartina spp. are the only species that cover
more than 10°io of the wetland, then the wetland should be given a dual Dual
rating (L'I�. The area of Spartina would be rated a Category II while tlie rating
relatively undisturbed upper marsh with native species would be a ��
Category I. Do not,however, e.xclude the area of Spartina in
determining the size threshold of 1 acre.
—At least 3/< of the landward edge of the wetland has a 100 ft bu�er of
shrub,.forest, or un-grazed or un-mowed grassland.
— The wetland has at least 2 of the follo�ving features: tidal channels,
depressions with open water, or contiguous freshwater wetlands.
::a':'_�?e��ans:'w"�..v_.2..€._Y�:.-:-:.�.��.;�".�:.:,a �-�:_".,:.,<Y`.:x.� ..:.:��^ '':,.::�::>: . ,. .,;:._- .: a;� .w�s�st "�a.....:3r�:�� �'.P�::.'�',;i�2.'Rci°a'-� ,-.x�-:�.�^:.�.., x..:�::
Wetland Rating Form—westem Washi.ngton 18 August 2004
ti��TLAl\TD RATL'VG FOR'�Z—VVESTERIV`'�ASHII�GTON
r y�. , .�, - �• ' ! �
I�Tame of wetland (if kno�nl: 1✓ll.p�I l�V��� � �/r�,� !—,% S'� i��-�-,';?�;'�
,�
Location: SEC: _TVrNSHP: _RNGE: _(ai:tach map���ith outline of wetland to rating form)
Person(s)Rating V4'etland: ��o�-�-� Affiliation: ��'S Date of site visit: �����
DR.�.F'I' SL��i��.�Y OF I�'�I��
�ategorr� based o� F'TiJNC�I'IOI�TS �rovided b�r wetland
I II �d I�'
Score for�'ater Quaiity Functions
Category I=Score>70
Category II= Score 51-69 Score for T-Tyd;ologic Functions
Category = Score 30-SO Score for Habitat Functions �
Cate�or ��TV — Sc.ore < 34 TO'�':-�L score for functions 2 i
Ca�egor�• b��ec� oi� SPECb�-"�i. CD�[�I2r�CB'�1�57['ICS of w�etlana
I II �3oes iiot ��ppiy
F�a� C�tegO�y' (choose the "highesf" categor-y from above) �
Check the appropriate type and class of wetland being rated.
� �: - C 4 :� _� . x�r�� ,,}� � 4 .i� aRS.
;"�£. �8��._� .-as 3_�,�5�.� .v-1:.'"��CF� a�
Estuarine De ressionai
Natural Heritage Z'Vetland Riverine �
' Bo Lake-frin e
Mature Forest Slo e
Old Growth Forest Flats
Coastal La oon Freshv►�ater Tidal
Interdunal
None of the above
R'etland Rating Form—westem Washington _ 1 August 2004
Does the �vetland beiug rated meet any of the criteria belovc-?
If you ans���er Y`ES to any of tl�e questions below you will nee.d to protect the. weiland
according to the regulat�ion's regarding the special characteristics found in the wetland.
� - � � C`heck List�for �i�etl�nds T}3at Nee,c� S�eci�al Protection, and� � �S'E� i1`O �� �
: ; . T�at_�►•e '�ut Inclucled in the Ratina �
; >
SP1. Has tlze ,verlard be���� c�'u���.�me�.;t�,��ls a h�:��irar ;=<�r a�:l�F���zt��l��'v iisted �
( Threatened or Endangered plant or animal s�ecies rT%E species,i. �
For the purposes of this rating system, "documented" means the v�-etland is ori the.
appropriate state or federal database.
SP2. Has the �vetlancz been documented as habitat for any State listed Threatened or
� Endangered plant ot-anima�species? '
For the puiposes of this rating system, "documented" means the wetland is on the
appro riate state database.
. SP3. Does the wetland cosztain individuals of Prioritv-s�ecies listed dy the WDFW
; �or the state? !
SP4. Does the ivetlancl have a local signifcance in addilion to itsfunctions? For �
example, tlie wetland has been identified in the Shoreline I�laster Program,
' the Critical Areas Ordinance, or in a local inaiiageinent plan as having
special significance.
To c�n�plete tr�e next�al•t of t1�e data sl2eet you �1:ill need to deieYnlis��e tlze
Hi�drogeomorphic Class of the tivetland bein �•� ated.
T�e hydrogeomorphi:; classification groups wetlands into tl�ose that function in similar ways. This
simplifies the questions needed to answer how well the wetland functions. The Hydrogeomorphic
Class of a wetland can be determined using the key below. See p. 24 for more detailed instructions
on cla�si*yin�«eilands.
�'�'etland Ra'ine Form— v:escem'J�'aslvnetor. _ AuEust 2004
i
Classificarion of��egetated ��'etlands for �'4�este.rn �'�'ashington
R'etland 1�'ame: ��V.F/��„(.(/�'��j Date: � I��%
1. Are the «-ater levels in the wetland usuall�� controlled by tides (i.e. except during floods)?
I�?O— go to 2 Y ES —the wetland class is Tidal Fringe
If yes, is the salinit�° of the water durin�periods � ual lov��flow below 0.5 ppt �parts per
thousandi^ YES—Freshwater Tidal Fringe Nd Saltwater Tidal Fringe(Estuarine)
Ifyour wetland can be classif ed as a Freshtivater Tidal Fringe use the forms Jor Riverine
wetlands. If it is Salt�vater Tidal Fringe it is rated as an Estunrine wetland. VVetlands tnat
were called estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fringe in the Hydroge.omoi�hic Classification. Estuarine wetlznds were
categorized separateh� in the earlier editions, and this separation is being kept in thi�
revision. To maintain consistency beriveen editions, the term "Estuarine" wetland i� l:ep?.
Please note,however; that the characteristics that define Categol�y I and II e�tuarine
�.
wetlands have changed (see p. ).
�2. Is lie t ography within the wetland flat and precipitation is only�ource ���9U°�o i or«�ater to it.
O Qo to 3 I'�S—The wetland class is Flats
If your wetland can be classified as a "Flats" w'etland, use the form for Depressional
wetlands.
3. Does fhe �retland meet both of The follov�-ing criteria'�
_T�e vegetated part of the wetiand is on the shore� of a rod•. ot op�r. «ater rti��:thout an_.
vegetation on the surface) where at least 20 acres (8 ha} are pern:anen�l� inuiidsted
(ponded or flooded);
At least 30% of the open vvater area is deeper tlian 6.6 ft�2 m±':'
N — go to 4 YES—The wetland class is Lake-fringe (Lacustri�e Fringel
4. Does the� `�etland meet all of the following criteria?
V The wetland is on a slope (slope can be verv grndztal),
�fihe water flo�vs through the«retland in one direction (unidirectional) and usuall}� i
� comes from seeps. It may flow subsurface, as sheetflow, or in a sw•ale without dist:.nct �
�banks_ �
The water leaves the ��etland without being impounded?
NOTE: Surface �tiater does not pond in these type of wetlands except occasionally in
very small and shallotiv depressions or behind hummoeks(depressions are usz�ally
<3ft di �and less than 1 foot deep).
NO - go to S YES% The wetland class is Stope
5. Is the wetland in a ley, or stream channel, where it gets inundated by overbank flooding fiom
that stream or river? The flooding should occur at least once every two years, on the average,to
answer "yes. " The wetland can contain depressions that are ftlled with water when the river is
not f7ooding.
NO - go to 6 YES—The wetland class is Riverine
VJetland Ratu�g Form—westem Washington 3 August 2004
6. Is the �vetlar�d in a topographic depression in�vliicl�water ponds, or is saturated to thr su;2a:.e, ,:;
some� tiine of the year. This means that ar.y oiatlet, if preser,t, is l:i�her-thar rhe interior- o����:e.
»�etland.
�IO— go to 7 Y'ES —The weiland class is Depressional
7. Is the wetland located in a very flat area���ith no obvious depression and no stream or river
running tlirough it and providing water. The ���et�and seems to be maintained by high
groundwater in the. area. 1�se ���etland may be ditched, hut has no obvious natural outlet.
'_�O— �o to S ��ES —The ���e:land class i� Depi�escional
8. �-o�:r :��et:and �e�zn� to be difticult to classif��. For example, seeps at the base of a slope ma��
grade into a riverine floodplain, or a small stream within a depressional wetland has a zone o2
flooding along its sides. Someti�nes we find characteristic's of several different hvdrogeomorpl�i�.
classes .�-ithu� one wetland boundary. Use the following table to identif}�the appropriate class to
use for the rating systein if you ha�e se.veral HGM classes present���ithin your«-efland. NOTE:
Use this table only if the class that is recomme.nded in the second colunul represents 10°o or�or:
of the tota) area of the wetland bein� rate�d. I�the area oi the second class is Iess than 10"'u classif��
the vvetland usin�the first class.
�I���l�'7c�s.�esA�rr#�riiz a��lznea:tec��eiland.8�un�'ai�'. �,�' �,. .�1as�tr�ryUS�alz I�a��n': ,,.... ��:i
Slope. +Riverine Riverine i
Slope + Depressional Depressional i
' Slope +L.ake-fruige Lake-fiinge
Depressional +Riverine along str�eam within boundary Depressional
Depressional +Lake-fringe Depressianal
Salt V�'ater Tidal Fringe and any other class of fresh�vater Treat as ESTUARIIvE under
I wetland wetlands with special
characteris#ics
If you are unable still to detezmine whic�h of the above criteria apply to your wetland; or you have
moa�e than 2 HGM classes ���ithin a wetland boundary, classify the wetland as Depressional £or
the rating. �i
Wetland Ratine Form—westem Washington 4 August 2004
� :}. s�Q�� ���:��i��as �� - s� y = - � ��j� _= � �:F � �= i, P�►����5 �L:
:
, _ � _
. -
; :
- - v � .._�, .. .� a�� � .,; _ �. ��
�.� � . , =� � ���
�� 1�'ATER QtiALITI FL7�ICTIONS -�Indicators'tfiat �i�etlan�l'functinn"s to �
iinpros-e ��a#er quatih�
S S 1. Does tbe «etland ha�-e the potential to improye w�ater qualit�? (see p. b9) �' `
S S l.l Characteristics of average slope of wetland: �
Slope i�l% or less (a 1%clope has a 1 foot veriical drop in eleLation for every
1 DO_ft horizonta;distance) ....... .............................. points �
Slope is 1% - 2% points �
Slope is 2°% - 5% points = 1
Slope is greater than 5°% points=0 �
S S 1.2 The soil 2 inches below the surface is clay, organic, or smells anoxic
(hydrogen sulfide or rotten eggsl. ��
YES = 3 points NO=0 points
S S 1.3 Characteristics of the vegetation in the wetland that trap sedimenis and
pollufants:
Choose Ihe points appropriate_for the description that dest jits the vegetation in
the �vetland. Derzse vegetarion means you hme trouble seeing the soil surface.
Dense, ungrazed, herbaceous vegetation>90% of the wetland area points = 6
i Dense, ungrazed,herbaceous vegetation> 1/2 of area . points= 3
Dense,woody, vegetation> 1% of area points= 2
Dense, ungrazed, herbaceous vegetation> L`4 of area points= 1 r,.,
Does not meet any of the criteria above for vegetation points=0 � +/
S Total for S 1 Add the points in the boxes above
S S 2. Does the wetland have the opportunity to improve water quality? (see p. 6i)
Answex YES if you know or believe there are pollutants in groundwater or surface
water coming into the wetland that would otherwise reduce water quality in
! streains, lakes or groundwater downgradient from the wetland?1�'ote which of the
' following conditions provide the sources ofpollutants.
� — Grazing in the wetland or within 150ft
— Untreated stormu�ater discharges to wetland
--f Tilled fields, logging, or orchards w-ithin 150 feet of vvetland
'� Residential, urban areas, or golf courses are within 150 ft upslope of
wetland multiplier
—( � f_
YE � multiplier is 2 NO multiplier is 1
S OTAL-Water Quality Functions Multiply the score from S 1 by S2
Add score to table on . 1
Comments
VJetland Rating Form–westem Washington 11 August 2004
� ��OpL' wE'rl�il{�S X - ` k ,� � _, a - � ka� ' r� ' k f, �OlI2t5 ,
� � a � � o- a,t � -� _ > ��t s �s3� :_�i�� ��:+ �>�Y'�Y'i
�_a. !._ :i:�r- _r._. � .3. ��b �:�. - s,s :i.k.�r,�s.-S�n .-z��"4,.3. '�Z`.^: .��.?;:.
- " . 'HYDROLUGIC'rL�TC'rIONS - Iticiicatc�rs that u�etlaud fuz�ctions to`reduce==. - �
`t7oodin� and sueatn ero�it,n _.
' � 3. Does the �cetland ha��e the potential to reduce floudiag and stream erosion?
(see 68)
S � S 3.1 Characteristics of vegetation that reduce the velocity of surface flows during
storms. Choose the points appropriate for the description that best�t
�
conditions in the �vetland. I
Dense, uncut, rigid vegetation covers > 90°ro of the area of the �;-etland. �
(stems of plants should be thick enough (usuall} > 1:'8in), or dense enough,to
remain erect during surface flo«-s j points= 6
Dense, uncut, rigid vegetation> 1%2 area of wetland points=3
Dense, uncut, rigid vegetation> l:'4 area points�
'��Tore than 1/4 of area is grazed,mo�ved, tilled or vegetation is � �
not rigid points=0 '
S S �.2 Characteristics of slope�;-etland that holds back small amounts of flood I
flo��vs: '
The slope«-etland has small surface depressions that can retain water o ° at
least 10% of its area. YES points Z2 ,;
NO points=0 �/ i
S Add the points in the boxes aboi�e ,�
S S 4. Does the wetland have the opporh�nit�� to reduce flooding and erosion?
; (see p. 70)
� Is the wetland in a landscape position where the reduction in vvater velocity it
provid�s helps protect downstream propert_v and aquatic reso�uces from flooding
or e_x�essive and/or erosive flows? lbTote til-hich of the following conditions apply.
V Wetland has surface nuloffthat drains to a river or stream that has flood'uig ',
problems '
— Other , multipliex
(�?nswer.�1T0 if the major source of water is conirolled by a reservoir(e.g. wetland is �
a�e�hat is on the dox�nstream side of a dam�
�ES multiplier is 2 NO multiplier is 1
S TOTAI. -Htidrologic Functions I�lultiply the score from S 3 by S 4
Add score to table on p. 1
Comments
We[land Rating Form-western Washington 12 August 2004
TIi'ese qr�e�trorrs apply fcr i,�efCanr�s c�ftrllf�Gl'�7c7c�sses �� �'?�� '' ` i t-� , �._F«�nts�.
_i-t:?. - < 1 .. , t.s'� x...._-..=.o.-v.a ��T.�,- .�-. - „Y.- � � .N. 2,_?i�" �I .i�.,.d.i '.,t�...1_..:.. �. �.
,•HABTTa�T.Ft`�rCTIOlti 5,=:IndicHtors that�r�etland fiulctioris"ta prot�de iinporiant habitat >. �
, - . _ ._=� - , _ - - :�
. . , �._ . -. .� �_ �.._
- _ __ _ 51 _4 5 �.j
": ,'. '.��. ' . .' . .. . . . . .. . ..`-_' ... -,�': .,.': �;. .� , r.{.:�.r. +„ `��!
� H 1. Does�the«�etland ha��e the potential to pro��de habitat�for man�� species? ��
H 1.1 Ve�etation structure (see p. '2)
Check the npes of vegetation classes p�•esent (as defined by Cotiti�ardin) if the class
covers more than 10% ofthe area ojthe wetland or ?�; acre.
/rlqua#ic bed
���Emergent plants
—��Scrub;'shrub (areas where shrubs have >30°io cover)
Forested �areas v�•here trees have>30% cover)
Forested areas have 3 out of 5 strata(canopy, sub-canopy, shrubs,herbaceous,
moss,�ground-cover)
Add the number of vegetarion types that qualifi�. Ifyou have:
I 4 tSTpes or more points =4
3 types points — �
2 tSpes points� /
; 1 t}-pe points= 0
H 1.�. Hvdroperiods (see p. 73) �
Check the types of water regimes (hydroperiods)present within the wetland. The
water regime has to cover more than 10%of the wetland or '/, acre to count. (see t�xt
,for descriptions of hydroperiods)
�Permanently flooded or inundated 4 or more t�pes present points�
�✓ Seasonally flooded or inu.ndated 3 types present points = 2
_�/Occasionally flooded or inundated 2 types present point= 1
�/ Saturated onlv
j _�Permanent]}flowing stream or river in, or adjacent to, the wetland
j � Seasonally flowing stream in, or adjacent to,the wetland 3
Lake fringe x�etland =2 points
Freshwater tidal wetland=2 points
H 1.3. Richness of Plant Species (see p. 75)
Count the number of plant species in the wetland that cover at least 10 ft2. (d�erent
patches of the same species can be combined to meer the size threshold)
t'ou do not have to name the species.
Do not include Eurasian Mil.foil, reed canarygrass,purple loosestrrfe, Canadian
This.tle
� If you counted: > 19 species points�
List species below if you�vant to: 5 - 19 species points 1
<5 species points= 0
A
I i
'���etland Faring Form-�i�estera��°ashineton 13 .�uo st�Ori�
i
�
I
i
�I
H 1.4. Interspersion of habitats (see p: 76) �
Decide from the diagrams below«�hether interspersion betvveen ty�pes of vegetation
{described in H 1.11, or vegetation types and unvegetated areas (can include open �
«�ater or mudflats)is high,medium, low, or none. I
� ,� �
=o
,
None= 0 points Lo��°= 1 1�oint �loderate = 2 peults �
rri �\ �}�F' � ��x,ai��.'s�� q{�`<< �y
l ' j' �—^
��� _..i .,.�n;.�s'�'�r#'
��� �/ ' < -
':� ���
. ° � �
z , � -
r4 : / x
� � [riparian braided channels]
High = 3 points I
NOTE: If you have four or more vegetation types or three vegetation t��pes (
and o en ti��ater the rating is ah��avs "high". �,
H 1.5. Special Habitat F'eatures: (see p. i 7)
Check the habitat features that are present in the wezland. 7'he number of checks is
the number of points you put into the next column.
Large, downed, woody debris within the wetland (>4in. diameter and 6 ft long).
Standing snags(diameter at the bottom>4 inches) ?n the wetlaud
Undercut banks are present for at least 6.6 ft (2m) andr'or overhanging vegetation
extends at least 3.3 ft(lm) over a stream for at least 33 $(lOm)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (>30degree slope) OR siens of recent beaver activity are present �
At least 1�4 acre of thin-stemmed persistent vegetation or woody branches are present
in areas that are permanently or seasonally inundated(structures.for egg-laying by
' amphibians) �
Invasive plants cover iess than 25% of the wetland area in each stratum of plants U�
H 1. TOTAL Score- potential for providing habitat
Add the scores in the column above
Comments
�'v etland Rating Form- westem�xJaslungton 14 August 2���04
H 2. Does the vvetland ba�:e the opportunit�� to pro��ide habitat for many species? � ;
' H �.1 Buffers (see p. 80)
Choose the description tnat best represents condition af buffer of wetland. The highest
scoring criterion that applies to the wetland is to be used in the rating. See text for
defnition of"undisturbed. "
— 100 m (330ft) of relatively undisturbed vegetated areas, rocky areas, or open water
>9�°'0 of circumference. No developed areas withiri undisturbed part of buffer.
(relati�-ely undisturbe.d also means no-grazing) Points = 5
— 100 m(330 ftl of relati��elv undisturbed vegetated areas, rocky areas, or open«�ater
> 50°�o circumference. Points = 4
— �0 m (170ft) of relativel}'undisturbed �egetated areas, rocky areas, or open�i�ater
>9�°ro circumference. Points=4
— 100 m(330ft1 of relatively undisturbed vegetated areas, rocky areas, or open water
> 25°% circumference, . Points =3
— �0 m (170ft) of relatively undisturbed vegetated areas, rocky areas, or open water
for> 50% cucumference.. Points = 3
If buffer does not meet an�� of the criteria abo<<e
— No paved areas (except paved trails} or huildings within 2> m (80ft} of wetland >
9�°% circumference. Light to moderate grazing, or lawns are OK. Points =2
— No paved areas or buildings v��ithin SOm of wetland for>50°o circumference.
Light to moderate grazing, or lawns are OK. Points =2 I,
— Hea���grazing in buffer. Points = 1 '
— Vegetated buffers are <2m wide(6.6ft) for more than 9�°ro of the circumference '
(e.g. tilled fields, paving, basalt bedrock extend to edge of wetland Points =0. �
— Buffer does not meet any of the criteria above. Poiuts = 1
H 2.2 Corridors and Connections (see p. 81�
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor (either ripazian or upland) that is ai least 150 ft wide,has at least 30% cover
of shrubs, forest or native undisturbed prairie,that connects to estuaries, other
wetlands or undisturbed uplands that are at least 254 acres in size? (dams in riparian
� corridors, hem�ily>used gravel roads,paved roads, are considered breaks in the
corridor).
1 YES =4 points (go to H 2.3) NO=go to H 2.2.2
, H 2.2.2 Is the wetland part of a relatively undisturbed and uribroken vegetated
I corridor (either riparian or upland)that is at least SOft wide,has at least 30% cover of
shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands
that are at least 25 acres in size? OR a Lake-fringe wetland, if it does not have an
undisturbed corridor as in the question above7
YES=2 points (go to H2.3) I�O=H 2.2.3
H 2.2.3 Is the weiland:
within 5 mi (8km) of a brackish or salt water estuary OR
within 3 mi of a large field or pasture (>40 acres) OR �
���ithin 1 mi of a Iake greater than 20 acres?
YES = 1 oint NO= 0 oints
VJetland Rating Form—western VVashington 15 August 2004
H ^.3 Near or adiacent to otherpriority habitats listed by VJDFW (see p. 82)
V�'hich of the following priority habitats are vvithin 330ft (100m)of the wetland?
f (see text for•a more d,etailed description of these priority habitats)
� Riparian: The area adjacent to aquatic systems with flowing water that contains
elements of both aquatic and terrestrial ecosystems which mutually influence each other.
As�en S#ands: Pure or mixed stands of aspen greater than 0.8 ha(2 acres).
Cliffs: Greater than 7.6 rn (25 ft) high and occuning below 5000$.
OId-growth forests: (Old-growth west of Cascade crest) Stands of at least 2 tree
species, fonning a multi-layered canopy with occasional small openings; with at
least 20 trees/ha (8 treesiacre) > 81 cm(32 in) dbh or>200 years of age.
Mature forests: Stands with average diameters exceeding 5� cm(21 in) dbh; crown
cover may be less that 100°%; croun cover may be less that 100°o; decay,
decadence, numbers of snags, and quantity of large do�uned material is generally
less than that found in old-grovt�th; 80 - 200 years old west of the Cascade crest.
Prairies: Relatively undisturbed areas (as indicate.d by dominance of native plants)
«here grasses ancL'or forbs form the natural climax plant couununity. �
Talus: Homogenous areas of rock rubble ranging in average size 0.15 - 2.0 m (0.5 - I
i 6.5 ftj, composed of basalt,andesite, and�o: sedimentar}�rock, including riprap
slides and mine tailings.'_�1ay be associated��ith cliffs. �
Caves: A naturally occurring cavity,recess,void, or system of interconnected I
passages
Oregon white Oak: Woodlands Stands of pure oak or oak�conifer associations
vvhere canopy coverage of the oak component of the stand is 25%.
ti rban Natural Open Space: A priority species resides within or is adjacent to the
� open space and uses it for breeding andlor regular feeding; and,�or 2he open space
functions as a corridor connecting other priority habitats, especially those that
would otherwise be isolated; and/or the open space is an isolated remnant of natural
habiiat larger than 4 ha(10 acres) and is surrounded by urban development.
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal wetlands,usually
semi-enclosed by land but with open,panly obstructed or sporadic access to the
open ocean, and in which oceau r�ater is at least occasionally diluted by fresh��vater
runoff from the land. The salinit}r may be periodically increased above that of the
open ocean by evaporation.Along some low-energy coastlines there is appreciable
dilution of sea water. Estuarine habitat extends upstream and landward to where
ocean-dem�ed salts measure less than O.Sppt. during the period of average annual
lovv flow. Includes both estuaries and lagoons.
MarinelEstuarine Shore.lines: Shorelines include khe intertidal and subtidal zones
of beaches, and may also include the backshore and adjacent components of the
terrestrial landscape (e.g., cliffs, snags, mature trees, dunes,meadov4s)that are
unportant to shoreline associated fish and wildlife and that contribute to shoreline
function(e.g., sandlrock/log recruitment,nutrient contribution, erosion control).
If wetland has 3 or more priority habitats = 4 points (�
If wetland has 2 priorit�habitats=3 points �J
If wetland has 1 prioriri�habitat= 1 point No habitats=0 points
VJetland Rating Form—western Wastungton 16 August 2004
I� H 2.4 V4'etland Landscape (choose the one descripiion of the landscape around the
wetl�rnd that best_tits) (see p. 84)
� There are at least 3 other wetlands writhin 'i�mile, and the connections betu.�een wem
' are relatively undisturbed(light gzazirg between wetlands OK, as is lake shore with
some boating, but connections should NOT be bisected by paved roads, fill, fields,
or ot��er development. points= 5
The wetland is Lake-fringe on a lake with little distutbance and there are 3 other lake-
fringe wetlands within 1/z mile points = 5
There are at least 3 other wetlands within liz mile,BUI'the connections between them
� are distur�ied points = 3
The wetland is Lake-fringe on a lake w�th disturbance and there are 3 other lake-
� fringe wetland within'/�mile points=3
There is at least 1 «-etland«�ithin t�i mile. points =2
IThere are no wetlands within 1�2 mile. pouits = 0 �
�
H 2. TOTAL Score - opportunity for providing habitat �
Add the seores in the colu»in above
Total Score for Habitat Functions — ad�the points for H 1,H 2 and record the result on
p. 1
Wetland Rating Form—westem Washington 17 August 2004
CATE.GORIZATION BASED ON SPECLAL CH�iR�CTERIS'I'ICS I
Please determine i the wetland meets the attributes described below and circle the I
�
appYopriate answers and Calegon'.
V4'etland T�'pe � � � :Category-
� �� _ -�
Chc��k�?f}rrrzy`c�ztc.r rc� rltczt a����h ta�'the���etlafn��� C'irc�e the 'ap��ro�riate C�rtPgon=' �`� a �
li�h���7 tlte ur?1ror��aule��t r1��rFn�lre nrE;. �
I 5C 1.0 �stuarine �;-e�tlands (see p. b'b� ' - ���
Does the wetland meet the following criteria for Estuarine wetlands? �,_ -
�Yoi
— The dominant water regime is tidal, � ' _ �'
— Vegetated, and �"
_ .f.-:
— �T�'ith a salinity greater than 0.5 ppt. -
YE S = Go to S C 1.1 NO -= �
SC 1.1 Is the wetland within a National Vi,'ildlife Refuge,National Park,
National Estuary Reserve,Ivatural Area Preserve, State Park or Educational, Cat. I
Environmental, or Scientific Resen-e designated under V�'.AC 332-30-151?
YES = Categorv T NO go to SC 1.2
SC 1.2 Is the wetland at least 1 acre in size and meets at least two of the
following three condiiions? YES = Category I NO = Category II Cat. I
— The wetland is relatively undisturbed(has no diking, ditching, filling, Cat. II
cultivation, grazine, and has less than 10% cover of non-native plant
M species. If the non-native Spaf•tina spp. are the only species that cover ;
more than 10°'0 of the wetland, then the wetland should be given a dua] Dual
rating (L'In. The area of Spartina v�,•ould be rated a Category II while the rating
relatively undisturbed upper marsh with native species would be a L,,II
Category I. Do not,ho�-ever, exclude the area of Spartina in
determining the size threshold of 1 acre.
— At least'/< of the landward edge of the wetland has a 100 ft buffer of
shrub, forest, or un-grazed or un-mowed grassland.
—The wetland has at least 2 of the following features: tidal channels,
depressions with open water, or contiguous freshwater wetlands.
�:._.^"w';n..�#A`::,ar. . ane.k.E:..�:.3,s.aa���a;..�... :.:�:� . . �:.�= ,�'f...�� ...,.s ....w 4±e:,. �nei?'"'..".,,'a�..-�..L«i�. r.'.Tz.x,�'.��.:,,-?'.:r-h1r`.. er�':..,..::iC7:�zH�..,.`�y�:. . �:a, ;r.'-_�
Vv etland Rating Form—western W aslungton 18 August 2004
i
1A. Wetland Mitigation Plan �
lo OQ ' a
�[e�l�d Bu�F�Fer MI�igQ�ior� Plcm
�00 S.160�`'S`I'REET
Cedc�River Corpora�e Pm�k
P�cel#:���f0�400285��OZ�0�9083
RENr0�,1�ASHIN�TON
�,.. , � a
��tu:rr��'.. ���^:
Murphy M�Cullo�gh
Tw�ngon Develop�el��
1000 Se�or���;��r��;�:��
Sui�e 3"'i�ii
Sc�le,4if..a`I1 i i;
;'�ii�;��'',='"�-�a�;i���
E']�c�il:fe�, '�C;:
CrL�'SPE�Ji'HF.
� � �
�r��e+t.w w�
�0�� ioath
�iormast Q�tssot
[ $06 � 5 � 8 - 7776
�asQ�a.com
Apri116,Z007
���
Execu�ive St�mm��
This report presents a mitigation plan for buffer impacts resulting from proposed
development of the 12.�7-acre site, Parcels 3340400285 & 3023459083, is located
bet���een Lind Avenue South and East Valley Road, south of S`V 19th Street in Renton,
«'ashington. SW 215` Street is located to the north and SW 23'd Street to the south;
ho«�ever, both of these street ROWs have been abandoned (Figure 1, Vicinity Map)..
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SI'��eSCTIp'�IOn
The site is currently undeveloped. A fire station is located north of the northwest
property corner (Parcel ,#3340400425), a commercial development is located to the east
beriveen the subject parcel and the East Valley Road; and a gas line is located on the
parcel to the south, within the abandoned SW 23rd Street ROW (Parcel # 3023059083).
The parcel is nearly rectangular, ��-ith a "panhandle" at the northeast corner.
The site v�-as filled prior to 1970 with from 7- to 10-feet of dense fill material. Scrubby
trees and shrubs have since become established on the site. The southeast corner and a
narrow band around the entire site are forested. The interior of the site is mostly scrubby;
tree species have generally not reached 20 feet or greater. Two mapped wetlands nearly
surround the site; a large ��vetland lies to the north and a smaller wetland«�raps around the
east and south property boundary. These wetlands have been included in numerous
previous inventories, including the City of Renton's Rivers, Streams & `T�'etlands
i
inventory. An unnamed tributary of Springbrook Creek is located on the adjacent parcel
to the south, south of the abandoned SVl' 23rd Street ROVI'.
Proposed Impac�s
No impacts are proposed to ��etlands on the subject site. Ho�vever, permanent impacts
«rill occur from construction of t���o bio-filtration s��-ales ��ithin the buffers of VVetlands A
and B, as shown on the storm drain plans. In addition, temporary impacts will result from
the placement of an additional t«-o to five feet of fill on the site. This «-i11 require some
clearing «�ithin the buffer because some of the fill material �vill spill onto the wetland I
buffer alons the south and east boundaries as ���ell as north of the northern bio-filtration
s«�ale. Finally, rain gardens will be constructed ���ithin the northern «�etland buffer. All of
these areas are forested �vith deciduous trees averaging approlimatel}� 10 inch DBH. '�
Impacts are illustrated on Figure 2, next page. Area totals for each type of impact are also �
shown belo�;� in Table 1: �
Table 1: Wetland Buffer Impacts 'i
Impact Type � Impact Area
Permanent Impacts(Biofiltration Swales) 3,729 SF
Temporary Buffer Impacts 11,358 SF
�� Rain Garden 12,307 SF
Final Bu�F�Fer Mi�lga�lor�Plcm I
The follo�ving mitigation plan is designed to mitigate for permanent impacts resulting
from the biofiltration swales and for temporary impacts due to clearing and placement of
additional fill material in «-etland buffers. No mitigation is being required by the City of
Renton for construction of the rain gardens within the buffer.
Permcmen�impac�s
As described in the Conceptual Buffer Enhancement Plan prepared by �'�'PS dated
December 21, 2006, to compensate for permanent impacts pursuant to the proposed bio-
filtration swales �vithin the buffers, the applicant is proposing to plant 400 conifer
seedlings, i.e. 300 Douglas fir and 100 ���estern red cedar, within the 31,169 square feet of
onsite undisturbed buffer. The existing buffers are currently nearly devoid of coniferous
trees, so this proposal will result in a significant habitat improvement to the ���etlands and
buffers. The seedlings �;�ill be distributed randomly throughout the undisturbed buffers.
Given the existing vegetation to remain, the density of trees that will be planted is
disproportionately great because attrition is expected due to the impracticability of
irrigation or other maintenance activities. No monitoring of the plantings is practicable
nor appropriate; it is anticipated that even if survivorship of as little as 30% of the total
trees planted occurs, these trees �;-i11 ultimately compensate for the total 3,729 square feet
of permanent buffer impact area.
WETLM/D'A'
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� WETL.AND BUFFER IMPAG75
Temporc��impac�s
As noted above, temporary impacts ���ill occur as a result of placement of additional fill
material spilling into the buffer. Because this ���ill burv the roots of existin� trees and shrubs,
revegetation of these areas «�ill be necessar�.
Cons�ruc�ion Plm�
The followin� measures ��ill be i1l�plemented to en11a11ce sur��i�arship of ne��-1�- plantee�
native species and to ensure that areas further do�vn slope from the anticipated limits of
construction are not affected.
1. In order to ensure that the implementation activities occur as intended, a pre-
construction meeting will occur ���ith the construction contractors and ��'PS prior to
initiation of all construction activities.
2. The limits of construction ��-i11 be established and marked by surve��ors.
3. The project biologist will verify the construction limits in the field.
4. Two parallel silt fences will be installed, one at the limit of buffer iinpacts sho�vn on
the site plan and another 5 feet further down slope in the�vetland buffer.
5. Follo���ing installation of the silt fences, the temporary impact areas ���ill be cleared.
6. Grading of the bios�vales and rain gardens ���ill occur and the structural fill «�ill be
I
applied within the temporary impact areas and mechanically compacted.
7. An 8- to 12-inch layer of topsoil will be placed on top of the structural fill and lightl}
compacted prior to planting in temporary impact areas to enhance plant gro�;-th.
8. Planting «�ill occur bet���een the months of October and Febniar�� per the attached
�'�'etland Buffer Mitigation Planting Plan prepared by AHBL.
9. Following planting, 3 to 4 inches of "Animal Friendly Hoa Fuel" (���ood chips)
obtained from Pacific Topsoils, or equivalent mulch will be applied throughout the
temporary impact area to protect plants from ���eeds and to maintain soil moisture.
Care ���ill taken to keep the mulch three inches from the stems of the plants to protect
from insect and rodent damage.
10. Temporary drip irrigation capable of deli��ering at least 1 inch of���ater per«�eek «�ill
be installed.
11. Five monitorina plots (i.e. tive areas planted according to the Typical Disturbed
Vl�'etland Buffer Planting legend sho���n on the Wetland Buffer Mitigation Planting ,
Plan, attached) will be identified in the field��c�ith permanent markers and photographs
taken for comparison during monitoring events.
12. Permanent fencing���ill be installed and signs attached to fence posts at appro�imately '
50-foot spacing along the buffer. Signs «�ill be constructed of inetal and state
"Sensitive Area: Please protect and care for this area. Alteration or Disturbance is
Prohibited by Law".
l3. Mitigation measures ��-i11 be implemented as needed to rectify any unauthorized
construction impacts.
1�l. The first silt fence will be removed after one year and then a year later, the other,
�o«-n slope silt fence, will be removed during the 3rd quarter maintenance visits.
Plm��i�g Plm�
Follo���ing clearing, native trees and shnzbs will be planted according to the attached ��'etland
Biiffer MitiQation Plantina Plan prepared by AHBL. Plant numbers, sizes and composition of
��i-ound covers are shown in Table 2.
Plant spacing will be irregular and random per the planting plan. This �vill result in a total of
4�3 shrubs and 99 trees being planted «-ithin the temporary buffer impacts area. 704 hardy
ground covers will also be plantcd per the planting plan. In addition, 400 conifer tree
seedlinys ��ill be planted ���ithin the undisturbed buffer.
Table 2: Planting Schedule within Wetland Buffer Areas
__.._..,
Temporary Impact Area
Common Name Botanical Name Number Size
Trees
Red alder Alnus rubra 15 1 gal.
Bitter cherry Prunus emarginata 41 2 gal.
Douglas fir Pseudotsuga menzeisii 20 2 gal.
Cascara Rhamnus purshiana 23 2 gal.
Shrubs
Vine maple Acer circinatum 23 2 gal.
Tall Oregon grape Mahonia aquifolium 68 1 gal.
Indian plum Oemleria cerasiformis 68 1 gal.
Red-flowering currant Ribes sanguineum 45 1 gal.
Nootka rose Rosa nutkana 68 1 gal.
Red elderberry Sambucus racemosa 68 1 gal.
Douglas spirea Spiraea douglasii 68 1 gal.
Snowberry Symphoricarpos albus 45 1 gal.
Ground Covers
Salal Gaultheria shallon 227 1 gal.
Low Oregon grape Mahonia nervosa 273 1 gal.
Swordfern Polystichum munifum 204 1 gal.
Permanent Impact Areas (within undisturbed buffer)
Trees
Douglas fir Pseudotsuga menzeisii 300 Seedlings
Western red cedar Thuja plicata 100 Seedlings
P�rFarmm�ce S�m�dc�ds
`'�'hen evaluated against monitoring data, performance standards are used to determine the
relative success of the mitigation project. Failure to meet these general minimum standards
throughout the monitoring period ��-ill result in implementation of contingency measures.
As noted above, because attrition is expected, planting density is e�aggerated due to the
impracticability of irrigation or other maintenance activities �vithin the undisturbed buffer
pursuant to mitigation for pernianent bios«-ale impacts.
Performance standards for the temporary impacts buffer enhancement area are shown belo���
in Table 3. VVhen evaluated against monitoring data, performance standards are used to
determine the relative success of the miti�ation project. Failure to meet these general
minimum standards throughout the monitoring period will result in compulsory
implementation of contingency measures.
Table 3: Performance Standards
��Criterion�.�.y.._.,_ ,�w_,-- -,���._..�a,.��.,�.._._�N.,�,�.�_.Year 1 ����Year 2 �Year 3 ��.Year 4��� Year 5���
__ . _ _. ---__.___ __---. ___--_ _ _ _ _. _ _ _ _____ __ _. _.._ .
Native plant cover (%) 10 - 20 20 - 30 30 - 70 70 - 90 100
Native woody plant cover (%) (for forested or 10-20 20-30 40 -60 60 - 80 80 -85
scrub-shrub areas)
Non-native, invasive plant cover(% ) (see below)
Plant survivorship (see below)
Species diversity (see below)
Species diversi�
The follov��ing minimuin standards appl}� to species diversity of native plants, including both
planted and volunteer species, ���ithin the various strata:
• trees =4 species, at least 1 of«hich must be coniferous
• shrubs = 5 species
• �-ound cover= 2 species '
Plm��s�mrorship I'
Plants are considered "dead" when more than 50% of the plant is decadent, with the
exception of cottonwood, �;�illow and red osier dog���ood, ��-hich will be considered li�-e if any
part of the plant is living.
Con�rol of no�ous,�v�sNe m�d�a�r-e species�ri�h Q�er�dency�o over��rhel�
Noxious «-eeds (identified on state noxious «reeds lists) including giant and Japanese
knoriveeds (Poll�gonum sachalinense, P. cuspidatum) must be entirely and properly
eliminated, and disposed of, from the site prior to installation, and throughout the monitoring
period.
Reed canarygrass (Phalaris arundinaceae), Scot's broom (Cvtisus scopar-ius), English iv��
(Hedera helix), creeping buttercup (Ranacnculus repens), and Himalayan and evergreen
blackberries (Rubus discolor-, R. laciraiatus), must be eliminated prior to planting and
thereafter strictly controlled and may not exceed 10°% total cover per species (i.e., up to 10°�
cover of each species may� be allowed) throughout the monitoring period. (Note: exception
for reed canarygrass in areas with surrounding dense stands of reed canarygrass and dense
mats of English ivy and creeping buttercup. In such cases, the objective is to provide habitat
diversit} �;�ith woody species by the end of the monitoring period; three foot diameter
planting holes �vill be cleared of all weeds prior to planting.
Fences m�d Signs
Fences and signs«�ill be inspected during the maintenance visits and must be in good repair.
Moni�orir�g
No monitoring of the seedling tree plantings «�ithin the undisturbed buffer area is practicable
nor appropriate; it is anticipated that even if survi�-orship of as little as 30% of the total trees
planted occurs, these trees will ultimately compensate for the total 3,729 square feet of
permanent buffer impact area.
�'�'ithin the temporary impact;`mitigation area monitoring shall continue for a minimum period
of five years of successful monitoring, i.e. monitoring meeting the performance standards.
An as-built dra�i-ing show-ing five (5) randomly-selected areas planted according to the
"Typical Disturbed Wetland Buffer Planting" (sho�vn on the Planting Plan prepared by
AHBL) «-ill be prepared within one month of completion of planting. Thereafter monitoring
���ill commence on the next quarter according to the schedule below. Monitoring �i-i11 consist
of a direct plant count �vithin these areas. Overvie��� photos �vill be taken from the same
vantage points each year to document overall appearance of the mitigation area before,
during, and after construction, as well as of each of the sample plots. Photo points and
sample plots shall be marked ���ith stakes to facilitate relocation from one monitoring event to
the next.
Specifically, the monitoring protocol«�ill consist of the following:
■ Evaluate plant cover and cover from undesirable species «�ithin the typical planting
areas;
■ Evaluate survi�-orship through a direct plant count within typical planting areas;
■ Visuallv assess and record wildlife use.
■ Inspect all fences and signs
Maintenance, monitoring and reporting will occur per the following schedule:
Table 4: Maintenance & Monitoring Schedules
Year Maintenance Visits Monitorin Report due
1 Between January 1 and March 1 AND Between January 1 and March 1 AND March 30
Between April 1 and June 1 AND Between April 1 and June 1 AND � June 30
Between July 1 and September 30 Between July 1 and September 30 � October 30
� Between October 15 and December 30 Between October 15 and December 30 January 31
2- 5 Between April 1 and June 1 AND Between September 1 and October 15 December 30
i Between July 1 and September 30
M��er�m�ce Plcm
Over the monitoring period, a rigorous quarterly maintenance program will be implemented
as shown on Table 4 to eliminate undesirable plants and to protect shrubs and small trees
from competition from weeds, repair or replace any buffer signage, replace dead plants, etc.
Only organic fertilizers and chemicals will be used for maintenance purposes in the buffer.
Examples of these include: corn gluten, Sluggo, Burnout Organic w�eed killer, Sharp Shooter
�
organic insect killer, Perfect Blend Organic Fertilizer, and Essential Biostimulant. Chemicals
�vill be applied by a licensed applicator. Fertilizer «�ill be applied after the first year of
planting and each year thereafter in the fall.
Con�ir�ger�cy Plcm
In order to provide for the contingency that performance standards may not be met during the
five-year monitoring period, it may be necessary to provide supplemental plantings. Plant
attrition can be remedied by evaluating the cause, and replanting with the same or a more
appropriate and approved species. The landscaping contractor «�ill guarantee 100 percent
sun�ivorship for one year from initial planting for losses due to defects in materials or
�vorkmanship. All plants that are used for replacement must meet the standards of the initial
plantings. The causes of any mortality ���ill be evaluated, and based upon the results of this
evaluation, alternate species selection may occur. Replacement «�ill be subject to the same
conditions and be made in the same manner as specified for the original planting.
Mi�ig�lor�S�y
The City of Renton requires tvvo surety devices: an installation device in the amount of 150°o
of the contracted cost of installation, and a maintenance securitv device in the amount of
125% of the contracted cost for maintenance and monitoring. The contracts must clearly state
that structures, improvements and mitigation «�ill perform satisfactorily for a minimum
period of five years. Signed contracts for these services and a maintenance security device
��-i11 be provided to the citv prior to issuance of a fill and grade permit.
Repor�Li�i���ons ,
`'�'ork for this project was performed, and this report prepared for, Tarragon Development, in I�
accordance «�ith generally accepted professional practices. A Firm Qualifications Statement
for V4'PS is provided in Appendix 1. This repor[ is not meant to represent a legal opinion. No I
other warranty, expressed or implied, is made. '
APPEI�D�X 1:
� FIRM QOA1.iFICATIONS STATEMEHT
li
�
�� H�lia�atioa � �[iti�atiosi glau�ais�� wAd
�� R�coainai�sws�e� � � anoAitoa�istf o
4valna�tioaa I.l.sa�ar �rroi�cts (ro�►ds, pow�r
o Permit sssistwnc� aad aad fas 1f.ia�ar) o
�.�ss�cT coordinatioa �iT�F l r_Tr.,a��rrn, Sstviroam�atwl cos�Pliaaa�
prol�ssiosaai r�aort �arin� coastrncti
psopa�sat3oa P���e.�_ C�4fc� ���-��75 P��s s�tiri�s aad P��
--- - -- - - --- - - - - I�"�7�: [����j 3��n'7�ry� QOAditioni
�:�1�� Q�O�) �4@-"�41;�
.�..mnc m,.. .�..�....
� ���� ���� o � � ������ � � � �� � �
`�'g��j��� ��r����� �p�'y�i�g�yT ���a�� is a firm that specializes in
«�etlands consulting and permirtine assistanc�e. The lirm��as established b�� Cele�ste Botha as CBVI�'E in
February 1992. It has been awarded Women Busine�ss Ente�rprise(VVBEj certification in Washington State.
In addition to���etlands studies, ��IT�'P S'provides habitat and small streams consulting service�s. A
description of��'11��JT P_-S',j�S� experience is outlined in the following sections.
R�etlands Botha has been a full-time consultant since 1988, «-ith major�vark emphasis on
«-etlands ecology, identification, inventorn', delineation, assessments, mitigation
and permitting. She has conducted�vell over 1,000 tietland delineations and ,
assessments, primarilv in�T��ashington, but also in Oreaon, California, Alaska and
Ne«•1'ork. and has �iritten at least 300 technical reports describing investigation
results. She is a US Army Corps of Engineers Certified �'�'etland Delineator. Ms.
Botha co-taught the VVetland Identification and Delineation course for the R'etland
. Certification Program at the University of R'ashington for three years, from 199� ,
through 1999. Ms. Botha��as Secretan'of the Pacific North«-est Chapter of the 'i
Society of���etland Scientists,the nation's largest chapter; for three years from
1994 through 1996. Ms. Botha���as on the Board of Directors of the Society for
Ecological Restoration Northwest from May 2004 through Nia� ?006. Her
knowledge of wetlands parameters is detailed belo��.
Permitting Since 1988, assisted public and private clients to meet local.
Assistance state and federal wetlands, streams, and shorelands requirements
to develop properties. These have included SEPA
Determinations of Non-Significance(DNS) and Environmental
Impact Statements(EIS),NEPA (EIS), Section 404 general
authorizations and indi��idual permits and Section 401 Vl'ater
Quality Certifications, 5horelines Management Act(S1�ZA)
permits, Hydraulic Permit Appro�-als(HPA), King County
Sensitive Areas Ordinance(SAO), Pierce and Snohomish
County ordinance compliance, as���ell as numerous other state,
county and city wetlands and stream ordinances.
VVetland Delineated��-etlands and prepared technical reports on hundreds
Delineation of acres in�'�'ashington; Oregon; California, Alaska, and Ne«
York; including many disturbed, ah�pical and problem area
evaluations.
so�� a. �oa�.u� �tsoet
•0a��, �1R 9i t4�
v egetation Bachelor of Science in Botany from University of Vi-'ashington, 197�.
Common and scientific names of over 300 plant species.
Soils Academic and practical soils training, at Oregon State University and
�s-hile employed with the USDA Soil Conservation Service�. Hydric
Soils Identification training. T���eh-e years eaperience with hydric
soils identification.
Established and conducted several��-ater-table fluctuation studies,
H��drolog�� including a?-}ear study on 160 acres of sugar cane in the Everglades
Agricultural Area, Florida; a project monitoring 12 strategicall}-placed
wells on sites in Renton. Kent and Auburn for 10 months; and a site in
Redmond �vith 8 vvells for 3 months. Devised protocol for monitoring
and evaluated?vears of�vell data for a site in Auburn.
Peer Re��ie«� Provided permit revie�� assistance for compliance ��ith sensiti�e area
reQulations to Pierce Count}�Planning and Land Ser�-ices and King
Counh�, Department of Development and Environmental Services;the
City of Ne��castle; the City of Sammamish; the City of Duvall; and the
Ciry of Federal��'ay,Washington.
En.ironmental Provided environmental inspection services durin�construction of a
Inspections �7.2 million transmission line upgrade in King County�, to ensure
compliance �-ith all permit requirements including Best Management
Practices and Iting County� Surface«'ater Design Manual guidelines.
particularl}'during construction in wetlands; inspected construction of
roads projects for Iting County for compliance with clearing and
grading permit conditions.
Functional Certified by USFV4'S in Habitat Evaluation Procedure(HEP) in
Assessments Anchorage in 1991;trained b} Bob Hruby (principal author) in the
Z004 V1�'ashington Department of Ecology «etland rating s��stem
February 200�.
Ecological Four years in the nursery and landscaping industn�, Peace Corps
Restoration �olunteer teaching agriculture, soil conservationist, and currently
«etlands consultant--these career elements have created a unique and
s�nergistic perspective on ecological restoration. As a wetlands
consultant, Ms. Botha has��-orked with landscape designers to develop
detailed mitigation plans for se.veral major and many smaller projects
and has created several small mitigation plans in-house.
_Vlitigation Monitored projects for compliance with performance standards,
�Tonitoring including Clark Lake Buffer Enhancement project; numerous VVSDOT
projects, dozens of projects for Pierce County, VVashington,Moha���k
Plastics project; and Talbot-Bem-dale Transmission Line.
Project Project manager for wetlands component on mare than 75 projects
':��Ianagement involving management and direction of associates, including most of
those described in this qualifications statement. Fifreen years
professional-le�-el work directing support personnel.
GPS Training Certificated b3-Corvallis Microtechnolo��(CMT), May 2001.
Retrained No�-ember 2004 and utilized GPS on I�lidland �'etland
Inventory fc�r Pierce Count��, ��A.
REPRESENTATI�'E LOCAL PROJECTS
REGL�L�TOR�' PEER REVIE"�
Regulator�� Revie�r, Cities of Kent, Duvall, Newcastle, Covington and Sammamish,
`'�'ashington. On-call peer review and permit assistance. Provided the City of Newcastle with peer
re��ie«� and perniit assistance as their on-call ���etland specialist on all development proposals with
��etlands and,%or streams issues since incorporation in 1995 and the City of Duvall since 1997.
En��ironmental Biologist, Pierce Count��, �'ashington. Acted as a staffbiologist on a part-time,
temporary basis for Pierce County Planning & Land Services, March through May 2000,
September 2001 through January 2003, and July through September 2003.
I�ing Count�- Senior Ecologist; I�ing County Department of Development and Environmental
Services; I�ing Count��, �Vashington. As a Senior Ecologist on temporary contract from May
1994 through December 1995, responsible for«-etlands regulatary review� of Washington State
Department of Transportation (WSDOT) high«�ay projects within the county, and King County
Public V�'orks Roads projects. `'erification of�;-etland delineations and impacts assessments,
participation in public hearings, coordination«�ith �'SDOT on permit review, assistance with
streams permitting issues, revie�� and significant input to mitigation proposals, and permit
conditioning. King County Public �'�'orks projects included: Issaquah-Hobart Road at Tiger
?�lountain Road, 68th Street, 241st Ave SE, Juanita-'Woodinville Road, 140th to 1�8th, Avondale
Road Phase 2, 128th to 132nd Avenue I�;E, SE ?08th Street, SE 240th Street, 272nd'277th Street.
�'�'SDOT projects included: SR 169; SR 18, 312th to 304th; SR 18, 30=�th to H���y 516; SR 18, H����
�16 to H«�y 169; SR 18, Green River to 312th; SR 18, Issaquah Hobart Road; SR 203 at 77th; SR
2 at Deception Pass; SR 900 at I�Zay Valley Road; SR 516 Mitigation; SR 405 at 160th; SR 520 at
Avondale Road.
�'�'ETLAI�D DELINEATION, ��IITIGATION PLA�I�ING AnD TECHNIC�L
REPORTING; VARIOUS CLIENTS, ��VASHINGTON STATE.
Delineated wetlands, prepared mitigation plans and prepared technical reports on hundreds of acres
in Vl'ashington, too numerous to list. Some examples are:
Cedar River Corporate Park, Renton, VVashington. Delineated ���etlands and prepared
conceptual mitigation plan on 12.57 acre site.
"�etland In�entory; n7idland area of Pierce County. Evaluated 372 parcels and delineated
«-etlands using GPS for inclusion on the County's GIS inventory. Entered data on each parcel into
the County's permitting database.
�'�'hidbeti- �1a�-al Air Station, Department of Defense, «'hidbey Island, Washington. Base-
wide ��-etland delineations of complex, disturbed site.
Ross Island Sand and Gravel, HIickitat County, Eastern `�'ashington. Delineated and
prepared technical report on an approximately 350-acre proposed gravel extraction site.
Nlohawk Plastics `'4'etlands Studies & Permitting Assistance; Auburn, `�'ashington.
Conducted detailed wetlands investigation on 7.5-acre site «-ith relict hydric soils to delineate
«�etlands. Coordinated with the city of Auburn and the Corps of Engineers to obtain a Section 404
individual permit to fi110.3 acres of jurisdictionally adjacent wetlands. Performed an impact and
functional value analysis, and developed a mitigation plan to compensate for wetlands impacts.
Nlitigation constnicted in �9arcl� ��0�. Completed �'ears I, II and ]II n�onitorin� and prepared
monitoring reports.
PUGET SOUND E1ERG�" (LI\E.aR) PROJECTS
Snohomish 8-inch Gas Line Upgrade. Snobomish Count� 2003 - ?00�: Delineated «�tlands
along 3-mile ]ong, 1�0-foot ���ide corridor; cooi-dinatiil� ��ith sun�evors to �nap ���etlands. Prepare�3
report for permit submittal.
Bothell to Sammamish Transmission Line Upgrade, Snohomish and King Counties,
numerous cities — ongoing: Delineated wetlands along a 13+mile long, 100-foot wide po�rer
corridor; coordinating with sun�eyors to map �vetlands. Assisted ��it11 pei-mittin��: pro��ided
environmental compliance services during construction. �
Talbot-Berrydale Transmission Line tipgrade, l�ing Count�, ���ashington, 1996 - 2003
EIS «'etlands Studies: '�4anaged«etlands and ���ildlife studies along a 7.� mile long, l0U-loot "ide
transmission line right-of-way. Delineation,classification, evaluation of all wetlands along the route,
impact assessment of installation of ne��-to«�ers and lines, as well as removal of old poles and line�.
Preparation of detailed��etlands report and EIS teht. Supervised staff biologists and administered
contractual issues. Coordinated��-ith King County and Puget Power. Developed conceptual mitigation
plan for project impacts. Monitored mitigation.
Reports and Permitting Assistance: Developed final reports addressing vegetative screening for
aesthetic �mpacts; loss of forested wetland habitat; temporary access ��-etland and stream impacts and
mitigation from construction; and final «-etland mitigation planning. Obtained King County gradin�,
permit, Corps Nationwide authorization, HPA and 401 Certifications.
Environmental Compliance: On-site inspections with oversight authority to enforce decisions related
to environme.ntal compliance throughout construction of the project im o1�in� in�tallation of�6 hu�e
steel monopole structures, 7 of which w�ere placed�;�ithin«-etlands.
'�'Iitigation A�Ionitoring: Monitored area� for natural r���enerntion and, in areas replanted as mitigation.
monitored for compliance for 3 years.
�'�'etland Delineation,Permit:�ssistance,�Iitigation Planning; Smaller Projects, Puget Sound Energ�,
�'�'ashington. Delineated wetlands within Yakima River floodplain for Kittitas Natural Gas Pipeline,
Pickering Transmission Line, Blake Island Cable Replacement,Marysville 8"High Pressure pipeline,
Mount Si Substation, Sahalee 12" STW HP supply main, SR 525iClassic Road transmission line, V411ite
I� Ri�-er Substation,Union Hill Substation. Delineated��etlands,prepared technical report, assisted ���ith
permit assistance and developed mitigation plans since 1992.
PROJECTS OUTSIDE OF«'ASHINGTON STATE
`�'etlands Specialist, ��'etlands Stud��, Yukon Gold Ice Pad (LGL Alaska Research
Associates); Staines River Area, North Slope, Alaska. Conducted «�etlands determination and
qualitative assessment of tundra surroundinQ an oil exploration and drilling ice platforni, a�id ���rote
technical report describing findings. y
`'�'etland Delineation; Empire Pipeline, Lpstate �e�r• York (�`'ood���ard-Chde Consultants).
Delineated ���etlands «�ithin 200-feet along the pipeline RO��'. �
`�'etlands Studies, niain Bay� Fish Hatcher}� Expansion, 111ain Bay, Alaska. Performed ���etland I,
delineations and habitat characterizations, and prepared tecluiical report for a proposed fish
hatchery expansion.
April 17,200?
_ _
WETLAND BUFFER MITI�ATION PLAN
300 S. 160T" STREET
CEDAR RIVER CORPORATE PARK
PARCEL #: 3340400285 & 3023059083
RENTON, WASHINGTON
PREI'ARED FOR:
MURPHY M�CULLOUGH
TARRAGON DEVELOPMENT
1000 �ECOND ,��'ENUE i
SUITE 3200 !��
SEATTLE,��';� 98104 ��
� (206; 233-9600 ����
PREI':�RED BY:
CELE�TE BOTI-LA
���P'...�
� �
WET�.AND PEYiM�TTING SERVICES
2025�outh�Iorman Street
Seattle,Washington qS�gg
(206 � 3�8-7775
wps�U isP.com
APRIL 16, 2007
�I
i
i
EXECLITIVE SL[MMARY
This report presents a mitigation plan for buffer impacts resulting from proposed
development of the 12.57-acre site, Parcels 3340400285 & 3023059083, is located
bet���een Lind Avenue South and East Valley Road, south of SW 19`" Street in Renton,
��'ashington. Sti'�' 21 S` Street is located to the north and SVV 23`d Street to the south;
ho«�ever, both of these street ROWs ha�-e been abandoned (Figure 1, Vicinity Map)..
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FIGIIRE 1:VICINITY MAP
SITE DFSCRIPTION
The site is currently undeveloped. A fire station is located north of the northwest
property corner (Parcel #3340400425), a commercial development is located to the east
between the subject parcel and the East Valley Road; and a gas line is located on the
parcel to the south, within the abandoned SW 23rd Street ROW (Parcel # 3023059083).
The parcel is nearly rectangular, with a "panhandle" at the northeast corner.
The site w�as filled priar to 1970 with from 7- to 10-feet of dense fill material. Scrubby
trees and shrubs have since become established on the site. The southeast corner and a
narrow band around the entire site are forested. The interior of the site is mostly scrubby;
tree species have generally not reached 20 feet or greater. Two mapped wetlands nearly
surround the site; a large wetland lies to the north and a smaller vvetland w-raps around the
east and south property boundary. These wetlands have been included in numerous
previous inventories, including the City of Renton's Ri��ers, Streams & Wetlands
inventory. An unnamed tributary of Springbrook Creek is located on the adjacent parcel
to the south, south of the abandoned S��' 23rd Street RO��'.
I'ROPOSED IMPACTS
No impacts are proposed to ���etlands on the subject site. Howe��er, permanent impacts
���ill occur from construction of two bio-filtration swales within the buffers of Wetlands A
and B, as shown on the storm drain plans. In addition, ternporary impacts ���ill result from
the placement of an additional rivo to five feet of fill on the site. This will require some
clearing ��-ithin the buffer because some of the fill material will spill onto the wetland
buffer along the south and east boundaries as �-e11 as north of the northern bio-filtration
s«�ale. Finally, rain gardens ���ill be constructed �ti ithin the northern ���etland buffer. All of
these areas are forested ���ith deciduous trees averaging approximately 10 inch DBH.
Impacts are illustrated on Figure 2, next page. Area totals for each type of impact are also
sho«�n belo�� in Table 1:
Tabie 1 : Wetland Buffer Impacts
Impact Type Impact Area
Permanent Impacts(Biofiltration Swales) 3,729 SF
Temporary Buffer Impacts 11,358 SF
Rain Garden 12,307 SF I
! i
FINAL BUFFER MITIGATION PLAN
The follo«�ing mitigation plan is designed to mitigate for permanent impacts resulting
from the biofiltration swales and for temporary impacts due to clearing and placement of
additional fill material in wetland buffers. No mitigation is being required by the City of
Renton for construction of the rain gardens«�ithin the buffer.
PERMANENT IMPACTS
As described in the Conceptual Buffer Enhancement Plan prepared by V�lPS dated
December 21, 2006, to compensate for permanent impacts pursuant to the proposed bio-
iiltration s���ales ���ithin the buffers, the applicant is proposing to plant 400 conifer
seedlings, i.e. 300 Douglas fir and 100 western red cedar, ��rithin the 31,169 square feet of
onsite undisturbed buffer. The existing buffers are currently nearly devoid of coniferous
trees, so this proposal «�ill result in a significant habitat improvement to the wetlands and
buffers. The seedlings will be distributed randomly throughout the undisturbed buffers.
Given the existing vegetation to remain, the density of trees that will be planted is
disproportionately great because attrition is expected due to the impracticability of
irrigation or other maintenance activities. No monitoring of the plantings is practicable
nor appropriate; it is anticipated that even if sur��ivorship of as little as 30°ro of the total
trees planted occurs, these trees will ultimately compensate for the total 3,729 square feet
of permanent buffer impact area.
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O°O°�:�_�EDAR RIVE12 CORPOI�ATE pARK
-- --- —— - — — — — ---
_ _ — — — ------_ — ------
� WETLAND BUFFEf2 IMPA;TS
TEMPORARY IMPACTS
As noted above, temporary impacts «ill occur as a result of placement of additional fill
material spilling into the buffer. Because this ��ill bury the roots of existing trees and shrubs,
revegetation of these areas ���ill be necessary.
CONSTRUCTION PLAN
The follo�ving measures ���ill be implemented to enhance survivorship of ne«�ly planted
native species and to ensure that areas further down slope from the anticipated limits of
construction are not affected.
1. In order to ensure that the implementation acti�-ities oc.cur as intended, a pre-
construction meeting �t ill occur ��ith the construction contractars and WPS prior to
initiation of all construction activities.
?. The limits of construction will be established and marked by surveyors.
3. The project biologist ���ill verify the construction limits in the field.
4. Two parallel silt fences will be installed, one at the limit of buffer impacts sho���n on
the site plan and another 5 feet further do���n slope in the wetland buffer.
>. Following installation of the silt fences, the temporary impact areas �;�ill be cleared.
6. Grading of the bios«-ales and rain gardens ��-i11 occur and the structural fill ���ill be
applied within the temporary impact areas and mechanically compacted.
, . r1n 8- to 12-inch layer of topsoil will be placed on top of the� structural fill and lightly
compacted prior to planting in temporary impact areas to enhance plant gro«•th.
S. Planting will occur bet«-een the months of October and February per the attached
�'�'etland Buffer Mitigation Planting Plan prepared by AHBL.
9. Following planting, 3 to 4 inches of "Animal Friendly Hog Fuel" («�ood chips)
obtained from Pacific Topsoils, or equivalent mulch «�ill be applied throughout the
temporary impact area to protect plants from ��-eeds and to maintain soil moisture.
Care �vill taken to keep the mulch three inches from the stems of the plants to protect
from insect and rodent damage.
10. Temporary drip irrigation capable of delivering at least 1 inch of�vater per week will ;
be installed.
11. Five monitoring plots (i.e. five areas planted according to the Typical Disturbed
V�'etland Buffer Planting legend shown on the Vl'etland Buffer Mitigation Planting
Plan, attached)will be identified in the field���ith permanent markers and photographs
taken for companson during monitoring events.
12. Permanent fencing��vill be installed and signs attached to fence posts at approximately
50-foot spacing along the buffer. Signs will be constructed of inetal and state
"Sensitive Area: Please protect and care for this area. Alteration or Disturbance is
Prohibited bv Law".
1�. Mitigation measures vvill be implemented as needed to rectify any unauthorized
construction impacts.
14. The first silt fence will be removed after one year and then a year later, the other,
down slope silt fence, ��-i11 be removed during the 3id quarter maintenance visits.
PLANTING PLAN
Follo���ing clearing, native trees and shrubs will be planted according to the attached Wetland
Buffer Mitigation Planting Plan prepared by AHBL. Plant numbers, sizes and composition of
�,round covers are sho«�n in Table 2.
Plant spacing will be irregular and random per the planting plan. This �vill result in a total of
453 shrubs and 99 trees being planted «-ithin the temparary buffer impacts area. 704 hardy
ground covers will also be planted per the planting plan. In addition, 400 conifer tree
seedlings will be planted«�ithin the� undisturbed buffer.
Table 2: Planting Schedule within Wetland Buffer Areas
Temporary Impact Area _ _
Common Name Botanical Name Number Size
Trees
Red alder Alnus rubra 15 1 gal.
Bitter cherry Prunus emarginata 41 2 gal.
Douglas fir Pseudotsuga menzeisii 20 2 gal.
Cascara Rhamnus purshiana 23 2 gal.
Shrubs
Vine maple Acer circinatum 23 2 gal.
Tall Oregon grape Mahonia aquifolium 68 1 gal.
Indian plum Oemleria cerasiformis 68 1 gal.
Red-fl�wering currant Ribes sanguineum 45 1 gal.
Nootka rose Rosa nutkana 68 1 gal.
Red elderberry Sambucus racemosa 68 1 gal.
Douglas spirea Spiraea douglasii 68 1 gal.
Snowberry Symphoricarpos albus 45 1 gal.
Ground Covers
Salal Gaultheria sha!!on 227 1 gal.
Low Oregon grape Mahonia nervosa 273 1 gal.
Swordfern Polysfichum munitum 204 1 gal.
Permanent Impact Areas (within undisturbed buffer)
Trees
Douglas fir Pseudotsuga menzeisii 300 Seedlings
Western red cedar Thuja plicata 100 Seedlings
PERFORMANCE STANDARDS
��4�en evaluated against monitoring data, performance standards are used to determine the
relative success of the mitigation project. Failure to meet these general minimum standards
throughout the monitoring period«-i11 result in implementation of contingency measures. ,
i
�
�
As noted above, because attrition is expected, planting density is exaggerated due to the
impracticability of irrigation or other maintenance acti�-ities «-ithin the undisturbed buffer
pursuant to mitigation for pernianent bios«�ale impacts.
Performance standards for the temporary impacts buffer enhancement area are sho�vn below
in Table 3. When evaluated against monitoring data, performance standards are used to
determine the relative success of the mitigation project. Failure to meet these general
minimum standards throughout the monitoring period «�ill result in compulsory
implementation of contingency measures.
Table 3: Performance Standards
----_�,_�...�.,._�. ,__ . _ . _.._ _ __ _ _. ,. ._ �_ _ .._._ _ . .:_...._.__,,.__�.,.R_...Y._�.�. ,_
Criterion Year 1 Year 2 Year 3 Year 4 Year 5
-.___---.___----- -_---_ ._----__._.____ _ __.__ _ _...__ ___ _ _ _______._.__. _____.
Native plant cover(%) 10 - 20 20 - 30 30 - 70 70 - 90 100 �
Native woody plant cover (%) (for forested or 10—20 20—30 40- 60 60 - 80 80 - 85
scrub-shrub areas)
Non-native, invasive plant cover(% ) (see below)
Plant survivorship (see below)
Species diversity (see below) ,
_.tiw �,,.�.,M.,.._�.�..r.,�..,.,.,�.o..,,,�.�...� ..�.o.�.�,�.. .�._�r�._,.,....�.,,__�._.�w,�,_.�� .� �
SPECIFS DIVERSITY ,
The follo«�ing minimum standards apply to species diversity of nati��e plants, including both �'
planted and volunteer species, ��-ithin the various strata: ',
• trees =4 species, at least 1 of which must be coniferous
• shrubs = 5 species
, • ground cover= 2 species
r�1..nNr suRVlvoRSH�P
Plants are considered "dead" when more than 50°o of the plant is decadent, «�ith the
exception of cottomvood, «�illo��� and red osier dog«ood, which will be considered live if any
part of the plant is living.
CONTROL OF NOXIOUS, INVASIVE AND NATIVE SPECIF�S WITH A TENDENCY
� TO OVERWHELM
�Toxious weeds (identified on state noxious ��-eeds lists) including giant and Japanese
knot«-eeds (Polygonunt sachalinense, P. cuspidatum) must be entirely and properly
eliminated, and disposed of, from the site prior to installation, and throughout the monitoring
period.
Reed canarygrass (Phalaris arundinaceae), Scot's broom (Cytisus scoparius), English ivy
(Hedera helix), creeping buttercup (Ranunculus repens), and Himalayan and evergreen
hlackberries (Rubus discolor, R. laciniatus), must be eliminated prior to planting and
thereafter strictly controlled and may not exceed 10°/o total cover per species (i.e., up to 10%
cover of each s ecies may be allo«�ed throua out the monitorin eriod. ote: exce tion
P ) � gP � P
for reed canarygrass in areas with sunounding dense stands of reed canarygrass and dense
mats of Enalish ivy and creeping buttercup. In such cases, the objective is to provide habitat
diversity «�ith «-oody species by the end of the monitoring period; three foot diameter
planting holes will be cleared of all «eeds prior to planting.
FENCES AND SIGNS
Fences and signs «�ill be inspected during the maintenance visits and must be in good repair.
MONITORING
No monitoring of the seedling tree plantings within the undisturbed buffer area is practicable
nor appropriate; it is anticipated that e�-en if sun�ivorship of as little as 30% of the total trees
planted occurs, these trees w�ill ultimately compensate for the total 3,729 square feet of
permanent buffer impact area.
Within the temporary impactimitigation area monitoring shall continue for a minimum period
of five years of successful monitoring, i.e. monitoring meeting the performance standards.
An as-built drawing sho��-ing five (5) randomly-selected areas planted according to the
"T�pical Disturbed Wetland Buffer Planting" (shown on the Planting Plan prepared by
AHBL) will be prepared «-ithin one month of completion of planting. Thereafter monitoring
«�ill commence on the next quarter according to the schedule below. Monitoring ���ill consist
of a direct plant count �vithin these areas. Overvie«• photos «-ill be taken from the same
vantage points each year to document overall appearance of the mitigation area before,
during, and after construction, as ��-e11 as of each of the sample plots. Photo points and
sample plots shall be marked���ith stakes to facilitate relocation from one monitoring event to
the neat.
Specifically, the monitoring protocol ��-i11 consist of the follo��•ing:
■ E��aluate plant cover and cover from undesirable species ��ithin the typical planting
areas;
■ Evaluate sun�ivorship through a direct plant count within typical planting areas;
■ Visually assess and record wildlife use.
■ Inspect all fences and signs
Maintenance, monitoring and reporting«�ill occur per the follow�ing schedule:
Table 4: Maintenance & Monitoring Schedules
Year Maintenance Visits Monitorin i Report due
1 Between January 1 and March 1 AND Between January 1 and March 1 AND ' March 30
', Between April 1 and June 1 AND Between April 1 and June 1 AND i June 30
' Between July 1 and September 30 Between July 1 and September 30 � October 30
Between October 15 and December 30 Between October 15 and December 30 January 31
2-5 Between April 1 and June 1 AND Between September 1 and October 15 i December 30
Between July 1 and September 30 �
MAINTENANCE PLAN
Over the monitoring period, a rigorous quarterly maintenance program will be implemented
as sho��vn on Table 4 to eliminate undesirable plants and to protect shrubs and small trees
from competition from ��veeds, repair or replace any buffer signage, replace dead plants, etc.
Only organic fertilizers and chemicals will be used for maintenance purposes in the buffer.
-
Examples of these include: corn gluten, Sluggo, Burnout Organic «-eed killer, Sharp Shooter
organic insect killer, Perfect Blend Organic Fertilizer, and Essential Biostimulant. Chemicals �
���ill be applied by a licensed applicator. Fertilizer «�ill be applied after the first year of
planting and each year thereafter in the fa1L
CONTINGENCY PLAN
In order to provide for the contingency that performance standards may not be met during the
five-year monitoring period, it may be necessary to provide supplemental plantings. Plant
attrition can be rernedied by evaluating the cause, and replanting «-ith the same or a more
appropriate and appro��ed species. The landscaping contractor �i-i11 guarantee 100 percent
survivorship for one year from initial planting for losses due to defects in materials or
���orkmanship. All plants that are used for replacement must meet the standards of the initial
plantings. The causes of any mortality w�ill be evaluated, and based upon the results of this
e��aluation, alternate species selection may occur. Replacement «�ill be subject to the same
conditions and be made in the same manner as specified for the original planting.
MITIGATION SUR.ETY
The City of Renton requires t���o surety devices: an installation device in the amount of 150°�0
of the contracted cost of installation, and a maintenance securit}� device in the amount of
1?5°io of the contracted cost for maintenance and monitoring. The contracts must clearly state
that structures, improvements and mitigation ���ill perform satisfactorily for a minimum
period of fi�re years. Signed contracts for these services and a maintenance security device
«�ill be provided to the city prior to issuance of a fill and grade permit.
REPORT LIMITATIONS
�'l'ork for this project «-as performed, and this report prepared for, Tarragon Development, in
accordance with generally accepted professional practices. A Firm Qualifications Statement
for VVPS is provided in Appendix L This report is not meant to represent a legal opinion. No
other warranty, expressed or implied, is made.
APPENDIX 1:
FIRM QL�ALIFICATIONS STATEMENT
i
�
i
O Delineation � MiCiga[ion�lanuuig and moniloru��+O
o Recoru�aixxance ewluatione `��]P� U/ Linea Yrojectx(roadx,Power ai�d gan linex�O
O Permit aeeietance and agency courdination . Lnv'vonmental comPliance dvrin&constzuction O
O Y��ofeseional re�ort�re�aration Pe�r review and Pcrmit conditioning O
o lmPact an�lysis and aeyueneing �^F g'p ,�'R;�_c•". -'.y _ S �y��';;7��=.� Wetland inver �
Pt�one:(<cwj__ , �.F.:.. _06•;>,:.S-7j7q
Ce_L(2i�h�24o_;,y�g
w���Jes�.wm
STATEMENT OF Q_LIALIFICATIONS
wetland Permitrin�Services�WPS�is a finn that specialiaes in���etlands consulting and permitting
assistance. The firm ��-as established b��Celeste Botha as CB�'�'E in February 1992. It has been a«-arded
�l�omen Business Enterprise (\�'BE)certification in �'�'ashington State. In addition to wetlands studies, �'P�
provides habitat and small streams consulting services. A description of�']��'s experience is outlined in the
follo«-ing sections.
�'�'etlands Botha has been a full-time consultant since 1988,with major work emphasis on
wetlands ecology, identification, inventort-, delineation, assessments, mitigation
and permitting. She has conducted well o�-er 1,000 �vetland delineations and
assessments, primaril�� in�'�'ashington, but also in Oregon, California, Alaska and
Ne«- York, and has„ritten at least 300 technical reports describing im�estigation
results. She is a L'S Army Corps of Engineers Cer[ified �'�'etland Delineator. Ms.
Botha co-taught the Wetland Identifcation and Delineation course for the Wetland
Certification Program at the Universih�of�'�'ashington for three years. from 1997
through 1999. Ms. Botha«as Secretary of the Pacific Northwest Chapter of the
Society of Wetland Scientists, the nation's largest chapter, far three years from
1994 through 1996. Ms. Botha«�as on the Board of Directors of the Society for
Ecological Restoration Northwest from 1�4ay 2004 through Ma} 2006. Her
knowledge of wetlands parameters is detailed below.
Permitting Since 1988,assisted public and private clients to meet local,
Assistance state and federal wetlands, streams, and shorelands requirements
to develop properties. These have included SEPA
Determinations of I�'on-Significance(DNS) and Environmental
Impact Statements(EIS),NEPA (EIS j, Section 404 general
authorizations and individual permits and Scction 401 Watcr
Quality Certifications, Shorelines Management Act(S1��iA)
permits, H}draulic Permit Approvals(HPA), King County
Sensitive Areas Ordinance(SAO), Pierce and Snohomish
County ordinance compliance, as��-e11 as numerous other state,
counri�and citv wetlands and stream ordinances.
VVetland Delineated�vetlands and prepared technical reports on hundreds
Delineation of acres in Washington, Oregon, California, Alaska, and Ne�;-
York, including many disturbed, atypical and problem area
evaluations.
2025 S.Vorman St7eel
Seattle,WA q8igg
�'egetation Bachelor of Science in Botany from Uni�ersit} of Washington; 19��.
Common and scientific names of o�-er 300 plant species.
Soils �cademic and practical soils training, at Oregon State University and
while employed with the USDA Soil Consen-ation Service. Hydric
Soils Identification traininQ. T�veh�e years esperience�vith h�dric
soils identification.
Established and conducted several «-ater-table fluctuation studies,
H��drolog�� including a?-year study on 160 acres of sugar cane in the Everglades
AQricultural Area, Florida; a project monitoring 12 strategically-placed
���ells on sites in Re�nton, Kent and Auburn for 10 months; and a site in j
Redmond with 8 �vells for 3 months. De.vised protocol for monitoring !
and evaluated� vears of well data for a site in Auburn. '
Peer Kevie�� Provided permit review assistance for compliance��-ith sensitive area
regulations to Pierce County Planning and Land Services and King
Counn-, Department of Development and En�-ironmental Services;the
City of Newcastle;the City of Sammamish; the CitS-of Du�-a11; and the ���
City of Fe�deral Way, Washington. �
En�ironmental Provided environinental inspection services during construction of a
Inspections $7.2 million transmission line upgrade in King County, to ensure
compliance«ith all permit requirements including Best�lanagement
Practices and King County Surface R'ater Design Manual Quidelines,
particularl}- during construction in���etlands; inspe�cted construction of
roads projects for King County far compliance with clearing and
grading permit conditions.
Functional Certified by USF�'�'S in Habitat Evaluation Procedure(HEP) in
Assessments Anchorage in 1991; trained b}-Bob Hrubj-(principal author) in the
�004 V�'ashington Department of Ecolo��vvetland rating system
Februarv?005.
Ecological Four vears in the nursery and landscaping industry, Peace Corps
Restoration ��olunteer teaching agriculture; soil conservationist, and currently
��etlands consultant--these career elements have created a unique and
s��nergistic perspecti�-e on ecological restoration. As a«-etlands
consultant,Ms. Botha has�i�orked with landscape designers to develop
detailed mitigation plans for se�eral major and many smaller projects
and has created several small mitigation plans in-house.
Nlitigation Monitored projects for compliance with performance standards,
Monitoring including Clark Lake Buffer Enhancement project; numerous WSDOT
projects, dozens of projects far Pierce County, `'��ashington, I��ioha��-k
Plastics project; and Talbot-Berrydale Transmission Line.
Project Project manager for«-etlands component on more than 7� projects
�Ianagement involving management and direction of associates, including most of
those described in this qualifications statement. Fifteen years
professional-level �i-ork directing support personnel.
GPS Training Certificated by Corvallis Microtec�hnology(CMT),1�1ay 2001.
Retrained November 2004 and utilized GPS on Midland��l'etland
In�-entory for Pie�rce County, �'�'A.
�p�sE�T�T1�-� Loc�L PRo.rECTs
REGtiLATORY PEER RE��'IE«'
Regulatory Re��iew, Cities of Kent, Duvall, Ne�vcastle, Covington and Sammamish,
`�'ashington. On-call peer re��ie��� and permit assistance. Provided the City of Newcastle with peer
re.�°ie��- and permit assistance as their on-call ��-etland specialist on all development proposals��rith
«�etlands andior streams issues since incorporation in 1995 and the City of Duvall since 1997.
En�ironmental Biologist, Pierce Count�r, Washington. Acted as a staff biologist on a part-time,
temporary basis for Pierce County Planning & Land Services, �Vlarch through May 2000,
September?001 through January?003, and July through September 2003.
King Count,y Senior Ecologist; King County Department of Development and En��ironmental
Services; King Countti-, `�'ashington. As a Senior Ecologist on temporary contract from May
1994 through December 1995, responsible for«�etlands regulatory review of Washington State
Department of Transportation (WSDOT) high���ay projects«-ithin the county, and King County ,
PuUlic Works Roads projects. Verification of wetland delineations and impacts assessments, ',
participation in public hearings, coordination with VVSDOT on permit review, assistance�vith �
streams permitting issues, revie��� and significant input to mitigation proposals, and permit
conditioning. KinQ County Public Warks projects included: Issaquah-Hobart Road at Tiger
Mountain Road, 68th Street, 241 st Ave SE., Juanita%Woodinville Road, 140th to 148th, Avondale
I Road Phase 2, 128th to 132nd Avenue'�1E, SE 208th Street, SE 240th Street, 272nd,�277th Street.
`'�rSDOT projects included: SR 169; SR 18, 312th to 304th; SR 18, 304th to Hwy 516; SR 18, H�;-y
I 516 to H��cry 169; SR 18, Green River to 312th; SR 18, Issaquah Hobart Road; SR 203 at 77th; SR
� 2 at Deception Pass; SR 900 at May Valley Road; SR 516 Mitigation; SR 405 at 160th; SR 520 at
� Avondale Road.
�'�'ETLAND DELINEATION, n1ITIGATION PLANNING AND TECHNICAL
REPORTING; VARIOUS CLIENTS, R'ASffiNGTON STATE.
Delineated«�etlands, prepared mitiaation plans and prepared technical reports on hundreds of acres
in`'�'ashington, too numerous to list. Some examples are:
Cedar River Corporate Park, Renton, Washington. Delineated v�-etlands and prepared
conceptual mitigation plan on 12.�7 acre site.
`�'etland In��entory; Midland area of Pierce County. Evaluated 372 parcels and delineated
«�etlands using GPS for inclusion on the Count}��'s GIS inventory. Entered data on each parcel into
the County's permitting database.
��'hidbey Naval Air Station, Department of Defense, �Vhidbey Island, «'ashington. Base-
«-ide wetland delineations of complex, disturbed site.
Ross Island Sand and Gravel, Klickitat County, Eastern �Vashington. Delineated and
prepared technical report on an approximately 350-acre proposed gravel extraction site.
Mohawk Plastics Wetlands Studies & Permitting Assistance; Auburn, Washington.
Conducted detailed wetlands investigation on 7.5-acre site with relict hydric soils to delineate
wetlands. Goordinated with the city of Auburn and the Corps of Engineers lo obtain a Section 404
individual permit to fill 03 acres of jurisdictionally adjacent wetlands. Performed an impact and
functional value analysis, and developed a mitigation plan to compensate for�vetlands impacts.
I
Mitigation constr-ucted in��iarch 200?. Completed 1'ears I, II and III inoiutorin� alld prepared
monitoring reports.
PUGET SOUND ENERG�' (LINEAR) PROJECTS
Snohomish 8-inch Gas Line Upgrade, Snohomish Count�- 2003 - 2004: Delineated «�etlands
along 3-mile long, 150-foot���ide corridor; coordinatina ���ith sur��eyors to map��etlands. Prepared
report for permit submittal.
Bothell to Sammamish Transmission Line L�pgrade, Snohomish and King Counties, I�
numerous cities —ongoing: Delineated«-etlands along a 13+mile long, 100-foot«�ide po���er ��
corridor; coordinating ���ith sun�eyors to map«�etlands. Assisted���ith permitting; provided ',
en�-iroi�iental compliance services during construction. ����
Talbot-Berr��dale Transmission Line Upgrade, King County, «'ashington, 1996- 2003 '
EIS �Vetlands Studies: Managed«-etlands and«-ildlife studies along a 7.5 mile long, 100-foot«�ide
transmission line right-of-�vay. Delineation, classification, evaluation of all���etlands along the route,
impact assessment of installation of ne��-to�vers and lines; as«-e11 as removal of old poles and lines. !
Preparation of detailed wetlands report and EIS test. Supen-ised staff biologists and administered
eontractual issues. Coardinated��-ith King Count}-and Puget Po«�er. Developed conceptual mitigation
plan for proje-ct impacts.Monitored mitigation.
Reports and Permitting Assistance: Developed final reparts addressing vegetative screening for
aesthetic impacts; loss of farested«-etland habitat; temporary access wetland and stream impacts and '
mitigation irom construction; and final wetland mitigation planning. Obtained King County grading �
pe�rmit, Gorps'vationwide authorization,HPA and 401 Certifications.
Environmental Compliance: On-site inspections�vith oversight authority to enforce decisions related
to environmental compliance tlu�oughout construction of the project involving installation of 56 huge
steel monopole structures, 7 of which were placed��ithin wetlands.
1�Titigation l�Zonitoring: A�lonitored areas for natural regeneration and, in areas replanted as mitigation,
monitored for compliance for 3 years.
`�'etland Delineation,Permit Assistance,l�Zitigation Planning; Smaller Projects,Puget Sound Energ��,
�'��ashington. Delineate.d���etlands within�'akima River floodplain for Kirtitas Natural Gas Pipeline,
Pickering Transmission Line,Blake Island Cable Replacement,Marysville 8"High Pressure pipeline.
Rlount Si Substation, Sahalee 12" ST��%HP supply main, SR 525iClassic Road transmission line, �'��ite
River Substation,Union Hill Substation. Delineated��-etlands,prepared technical report, assisted«ith
permit assistance and developed mitigation plans since 199?.
PROJECTS OUTSIDE OF«:�SHINGTON STATE
«'etlands Specialist, R'etlands Study,Yukon Gold Ice Pad (LGL Alaska Research
Associates); Staines River Area,North Slope, Alaska. Conducted«�etlands determination and
qualitative assessment of tundra surrounding an oil exploration and drilling ice platform, and wrote
technical report describing findings.
«'etland Delineation; Empire Pipeline,ti�pstate New York (`ti'oodward-Clyde Consultants).
Delineated�;-etlands��Tithin 200-feet along the pipeline ROVV.
«'etlands Studies, h�iain Bay Fish Hatchery Expansion, h7ain Bay, :�laska. Performed wetland
delineations and habitat characterizations, and prepared technical report for a proposed fish
hatchery expansion. �
.a�,�:�t-,_oo?
2. Geotechnical Report
�� �0 = �
i
GEOTECHNICAL REPORT
Cedar River Corporate Park
SW 21st Street and Lind Avenue SW
Renton, Washington
Project No. T-5996
:_..�:.�-_
: _ Terra Associates, Inc.
� �•j
3`. f.s v.+�..-.. .
Prepared for:
TARRAGON
Seattle, Washington
December 7, 200fi
� �
TERRA ASSOCIATES, Inc.
Consultants in Geotechnical Engineering, Geology
and
Environmental Earth Sciences
December �, 2006
Proje.ct No. T-5996
R4r. '�-lurphy McCullough
TARRAGON
1000 Second Avenue, Suite 3200
Seattle, Washington 98104
Subject� Geotechnicai Report
Cedar River Corporate Park
SVb'21 st Street and Lind A�enue S�V
Renton,Washington
References: 1. Report of Soil In�-estigation, Proposed Storage Terminal, Renton, Vb'ashington,
prepared by Dames and Moore, dated May 24, 1968
2. Report of Supplemental Investigation,Proposed Warehouse�'Office Building Site,
Li�id Avenue, Renton,Washington,prepared by Atlas Geotechnical Engineering, Ine.,
dated April 15, 1985
Dear Mr. McCullough:
As requested, we have conducted z geotechnical engineering study for the subject project. The attached report
presents our findings and recommendations for the geotechnical aspects of project design and construct�on.
Results of our field exploration confirm soil conditions as indicated by previous site studies and summarized in
the referenced reports. We observed eight to ten feet of silty sand/sandy silt fill overlying native soils composed
of organic silt and peat fo:lowed by interbedded alluvial layers of sandy silt, silt, and silty sands. �'�'e also
observed groundwater seepage in our test pits at depths of 9 to 14 feet below current siie grades.
In our opinion, the existing fill will provide suitable immediate support for con.rentional spread footmg
foundations. However, the immediate organic silt and peat layers will be subject to consolidation settlement due
to stresses imposed by the spread footings. If the risk for distortional settlement cannot be tolerated, a majority
of the potential se:tlement can be mitigated b�� surchargirg the building sites.
Detailed recommendations for sw�charging the building pads and design of foundations along with other
geotechnical design considerations are presented in the at�ac�7ed report.
12525 �-'Villo�vs Road, Suite 10i, Kirkland, \Nashington 98034
Phone (425) 821-7777 • Fax !425) 821-4334
Mr. Murphy McCullough
December?, 2006
��'e trust the information presented is sufficient for yoar cun�ent needs. If you have any questions or require
additiona] information,please call.
Sincerely yours, ,
TERRA ASSOCI_ATES,ItiC.
��� �: � o`�o�.-�s�./�
David P `�.au�,L:E:;G ,. -
Engine, �r�g Gealbgist'c:�'�``�
,/ - '�/�
�. � �, . �Z-�- a t�
� : � - .._ � - ';7�
Theodoie�. Scip�perj P��,
�
l
Principa� ".`���,� ��'� �'�`'
�`�`� .
...��'}�r�:;:,1 , � ,
DPL/TJS mb � ;`_;"`�,
;c ` (�
�: ._. _;_ 6�" I
�
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Project:vo. T-�996
Paee I�o. ii'�'
TABLE OF CONTENTS
Page No.
1.0 Project Description.......................................................................................................... 1
2.0 Scope of R�ork................................................................................................................. 1
3.0 Site Conditions.................................................................
...............................................
3.1 Surface................................................................................................................2
32 Subsurface..........................................................................................................2
3.3 Groundwater....................................................................................................... 3
4.0 Seismic............................................................................................................................ 3
5.0 Discussion and Recommendations.................................................................................. 3
5.1 General............................................................................................................... 3
5.2 Site Preparation and Grading.............................................................................4
5.3 Excavations........................................................................................................ 6
5.4 Foundations................................................................ ,
........................................
5.5 Slabs-on-Grade................................................................................................... 7
5.6 Stomlwatei-Detention Pond............................................................................... 8
5.? Drainage............................................................................................................. 9
5.8 Utilities...............................................................................................��---��-•---.... 9
5.9 Pavements........................................................................................................... 4
6.0 Additional Services......................................................................................................... 9
7.0 Limitations .................................................................................................................... 10
Figures
L'icinity Map .................................................................................. Figure 1
......................................
Exploration Location Plan ................................................................................................... Figure 2
Typical Settlement Marker Detai]........................................................................................Figure 3
Ty�ical V4'all Drainage Detail..............................................................................................Figure 4
Annendiz
Field Exploration and Laboratory Testing .......................................................................Appendix A
Test Pit Logs By Others ...................................................................................................Appendix B
i
Geotechnical Report
Cedar River Corporate Park
SW 21 st Street and Lind Avenue SW
Renton, Washington
1.0 PROJECT DESCRIPTION
The approximately 11.5-acre site is located between SV�' 21 st and SW 23rd streets, east of Lind Avenue SW in
Renton, Washington. Site development will include constructing 4 office sh-uctures each approximately 33,000
squai-e feet in size. Specific building design information is not yet available; however, ���e expect the buildings
wil] be constructed using precast concrete tilt-up wall panels with interior isolated columns supporting the roof
structure and possible mezzanine levels. Floors will be constructed at grade at elevations near current site grades.
Structural loading is expected to be light to moderate, with isoiated columns cairying ioads of 80 to 100 kips, and
bearing��-alls carrying 6 to 8 kips per foot.
Stormwater w711 be collected and routed for treatment and contc-olled discharge frorn a detention pond located in
the northeastern panhandle of the site. Specific pond construction;'design information is not yet availabie;
ho��,�ever, we expect the pond will be constructed primariiy by excavations eatending fi to 12 feet below current
site grades.
The recoinmendations in the following sections of this report are based on our understanding of the preceding I
design features. We should review design drawings as they become available to verify that our recommendations
have been properly interpreted and to supplement them, if required.
2.0 SCOPE OF V1�ORK
Our work was completed in accordance with our authorized proposal, dated October 23, 2006. Accordingly, on
November 1, 2006, we excavated 8 test pits to depths of 13 to 15 feet below existing surface grades. Using the
results of our subsurface exploration along with existing soils data from previous studies performed at the site in
1968 and 1985, we performed analyses to develop geotechnical engineering recommendations for project design
and construction. Specifical;y,this report addresses the following:
• Soil and groundwater conditions
• Seismic
• Site preparation and grading
• Excavations
• Foundation support altematives
• Slab-on-grade support
• Drainage
• Utilities
• Pavements
December ?, 2006
Project No. T-5996
It should be noted that recomrnendations outlined in this report regarding drainage are associated with soil
sn-ength, design earth pressures, erosion, anc� stability. Design and performance issues with respect to moisture
as it relates to the sti-ucture environment (i.e., humidity, mildew, mold) is beyond Terra Associates' purview. A
building envelope specialist or contactor should be conculted to address these issues, as needed.
3.0 SITE CO'�'DITIONS
3.1 Surface
The project si�e is ]ocated southeast of the intersection of SW 21st Street and Lind Avenue SW in Renton,
Washington. The approximate location of the site is shown on Figure 1.
The site is nearly rectangular and includes a small panha�ldle parcel that forms the sites northeastern corner. The
site is currently vacant���ith surface vegetation consisting of deciduous trees «�ith moderate blackberry and brush
understory. The site is elevated above adjacent parcels to the north, east, and south and at grade with Lind
Avenue to the west. The site was filled in the late 1960s in preparation for developing the site as a fuel storage
facility. P:evious exploration completed at the site by others in 1985, indicated fill depths of 8 to 10 feet across
the property.
3.2 Subsurface
Soil conditions we observed at the recent test pit excavations confirm the earlier site studies. In general, we
obsenred approximately nine to ten feet of fill material composed of silty sand and sandy silt mixed in areas with
fractured fragments of bedrock. Large boulder sized (two- to four-foot diameter) bedrock fragments were
observed below tlu�ee to four feet at all test pits. This fill overlies the original surface vegetation which appears
to have included some small trees as logs were observed at a few of the test pits. Underlying the fill and origina]
organic surface layer, we observed a two-to four-fook layer of organic silt and peat. Previous test pits excavated
in 1985 indicated the thickness of this layer ranged from about two feet to a maximum of about seven feei.
Underlying these organic soils, alternating layers of s:lty sand, silt, and sandy silt were observed to the test pit
termination depths.
The Geologic Map of rhe Renton Quadrangle, Washington, by D.R. Mullineaux (1965), maps the site soils as
Peat (Qlp) and Alluvium (Qaw). The native soils we observed in the test pits are consistent with these
descriptions.
The preceding discussion is intended as a general review of the soil conditions encountered. For more cornplete
descriptions, please refer to the Test Pit Logs attached in Appendix A and B.
Page No. 2
December ", �U06
Project?�o. T-S996
3.3 Groundwater
V�'e observed g:-oundwater seepage at depths rang:ng from 9 to 14 feet below the current site elevations. The
previous I98� study at the site indicated ligllt to hea�y groundwater see.page into the test pits at depths ranging
from 6 to 10 feet below site grades that existed at that time. Fluctuations in groundwater levels will occur
seasonally and annually, with lowest levels and volumes occurring during late summer to early fal] (July through
September). Given the time of year our exploration work was completed, groundwater seepage leve;s observed
likely represent seasonal 1ow]evels.
A two-inch diameter slotted PVC pipe was installed in Test Pit TP-2 when backfilled. This instai?ation, while
crude, w�ll allo�- for measuring the depth to groundwater during the upcoming winter months and obtain a better
understanding of seasona] high groundwater elevation at the site. We expect the groundwater��ould be present at
de ths of five to six feet beiow the surface dui-in and shortiv followin the«�et�-inter seasor..
P € , €
4.0 SEIS'�IIC
Based on the soil conditions encountered and our understanding of area geology, per Section 1615 of the 2003
International Building Code (IBC), site class "D" should be used in design of the st�-uctures.
I_iquefaction is a phenomenon where there is a reduction or coinplete loss of soil strength due to an inerease in
�.ater pressure induced by vibrations. Liquefaction mainly affects geologically recent deposits of 3oose, fine-
grained sand and silty sand underlying the groundwater table. 5oils of this nature derive their strength from
intergranular friction. The generated water pressure or pore pressure essentially separates the soil grains and
eliminates this intergranular friction; thus, eliminating the soil's strength. !
Ir.formation obtained from our recent subsurface exploration indicates that the deeper nati�-e soils at the site are
alluvial in origin. Ground���ater was observed at variable depths ranging from 9 to 14 feet below current site
grades. Historical data indicates that the allu�7a1 sand layers below the water table exhibit medium dense to ver}=
dense characteristics. The deeper alluvial soil strata composed of sandy or clayey silt, due to their fines content,
�vill exhibit cohesive strength, and are not significantly be affected by the liquefaction phenomenon. Based on
analysis, in our opinion, the risk for soil liquefaction to occur at the site and its associated hazard are lo��•.
5.0 DISCUSSI01 AND 1tEC0'�4'�iENDATIONS
5.1 General
The primary geotechnical consideration that will govern site development is the potential for distortional building
settlements to occur due to the compressible organic silt and peat layers that were observed across the site. These
native soil layers will consolidate under static dead loads imposed by the structures and product loading on floor
slabs constructed at grade. Assuming a 100-kip column load, a bearing stress of 2,000 psf, and a maximum
footing depth of 2 feet belov�� current site grades, analysis indicates settlement ranging from 1 to 4 inches could
occur with differential movement of 1 to 2 inches. We estimate the differential settlement would occur over a
building span of 100 feet. This settlement will likely be distortional and cause building cracking along witn
misalignment of doors and windows. If the risk for distortional building settlements cannot be tolerated, a
majority of the potential settlement can be mitigated by surcharging the building sites. Surcharging would
involve placing additional fill on the building pads above the finished floor elevations to induce primary
consolidation sett�ements to occur before build:ng construction is initiated.
Page No. 3
' December ;, �006
Project No. T-5996
In our opinion, the existing fil] soils are sufficiently compact to provide suitable immediate support for the
buiJdings using conventional spread footing foundations. However, the soils are sensitive and will be easily
disturbed by normal construction activity. Consideration should be gi��en to placing a four-inch layer of crushed
rock over the bearing subgrade to serve as a working mat and to protect the soils from disturbance especially if
work occurs during the winter. Similar consideration should be given for protecting the integrity of the building
floor and pavement subgrade. Cement amending the subgrade should be considered if the construction schedule ,
results in the soi] subgrade being exposed to wet���eather. !
The fill and native soils encountered at the site contain a significant amount of fines and will be difficult to
compact as structural fill when ioo wet. The ability to use on-site soils from the site excavations as structural fill
will depend on its moisture content and the prevailing weathex conditions at the time of construction. The
earthwork contractor should be prepared to dry the soils by aeration during the normally dry summer season to
facilitate compaction as suvctural fill. Altematively, stabilizing the moisture w�ith cement kiln dust (CKD),
cement, or lime can be considered. If grading activitie� wili take place during the winter season, the eartn�ork
and utility contractor should be prepared to im}�ort clean granular material for use as structural fill and backfill.
I�� addition, the utility contractors should be prepared for encountering large boulder-sized bedrock fragment�
v�-ithin the existing fi]] v��here excavations extend to depths of four feet and greater below the site. These targer
fi�agmenzs wiil not be suitable for reuse in backfilling the utility trenches and wi11 likely require disposa] off-site.
Detailed recommendations regarding these issues and other geotechnical design considerations are provided in
the foliowing sections. These recommendations should be incoiporated into the fir.al design dra��-ings and
construction specifications.
5.2 Site Preparation and Gradin�
Surface vegetation and the upper organic soil layer should be stripped and removed from the site. Based on our
recent test pits, surface stripping depths of about six inches should be expected to remove the vegetation and ,
near-surface organic layer. Once clearing and grubbing operations are complete, grading to establish desired
building elevations can be initiated.
Exposed subgrade should be observed by a representative of Terra Associates to verify that soil conditions are as
expected and suitable for support of new construction or additional fill. Our observations may include requiring
tlle contractor to proofroll the exposed subgrade with heavy rubber-tired construction equipment, such as a grader
or loaded dump truck, to determine if there are excessively soft and yielding areas. If unsuitable yielding
subgrade is exposed and it cannot be stabilized in place by aeration and compaction, the affected soils should be
excavated and removed to firm bearing and grade restored with�new structural fill. If the depth of excavation to
remove unstable soils is excessive use of a geotextile reinforcing/separation fabric, such as Mirafi SOOX or
equivalent, can be considered in conjunction with clean granular structural fill. Our experience has shown that,
in general, a minimum of 18 inches of a clean, granular structural fill over the geotextile fabric should establish a
stable bearing surface. Alternatively, it may be feasible to stabilize the soils by amending with Portland cement,
CKD, or lime.
Page No. 4
_
December 7, 2006
Project No. T-5996
If�-ading activities are planned during the wet winter months, and the on-site soils become too wet to achieve
adequate compaction, the owner or contractor should be prepared to treat soils with CKD, lime, or cement, or
import wet weather structural fill. For v��et weather structural fill, we recommend importing a granular soil that
- meets the following grading requirements:
U.S. Sieve Size Percent Passing I
6 inches 100
No. 4 75 maximum
:�Io. 200 5 maximum*
*Based on the 3/4-inch fraction.
Prior to use, Terra Associates, Inc. should examine and test all materials to be imported to the site for use as
structuraI fill. Structural fill should be placed in uniform loose layers not exceeding 12 inches and compacted to
a minimum of 95 percent of the soil's maximum dry density, as determined by American Society for Testing and
Materials (ASTM) Test Designation D-698 (Standard Proctor). The moisture content of the soil at the fime of
compaction should be v��ithin tvvo percent of its optimum, as determined by this ASTM standard. vl nonstructural
areas or for backfill in utility trenches below a depth of 4 feet, the degree of compaction can be reduced to 90
percent.
As noted earlier, if foundation sub��ade is exposed to wet weather, consideration should be given to protecting
the sub��ade from disturbance by placing a four-inch mat of crushed rock over the subgrade to serve as a working
mat. For the building pad and pavement subgrade subjected to dynamic loading from consiruction vehicle traffic,
amer.ding the top 12 inches of subgrade with Portland cement or placing 12 inches of wet weather granular
structural fill on the subgrade to prevent deterioration should be considered.
Surcharge
As discussed earlier, if distortional settlement ranging frorn 2 to 4 inches in total and 1 to 2 inches differentially
over a 100-foot span cannot be tolerated, we recommend surcharging the building areas to indvice settlement in
the primary consolidation range prior to building construction. For this procedure, we recommend placing fill in
the building areas for a minimum height of three feet above proposed building finished floor elevations. This
surcharge fitl does not need to meet any special requirements other than having a minimum in place unit weight
of 120 pounds per cubic foot (pc�. However, it may be advisable to use a good quality fill to raise grades in
other portions of the site, such as parking and driveway areas, or use for trench backfill if necessary. The
surcharge fill should extend a ininimum of two feet beyond the edge of the perimeter building footings.
Total settlement under the surcharge fill is esrimated in the range of two to four inches. It is estimated that 90
percent of the consolidation settlement will occur in about three to four weeks following full application of the
surcharge fill.
Page No. S
December ?, 2006
Project No. T-S99b
To verify the amount of settlemer.t and the time rate of movement, the surcharge program should be monitored by
installing settlement markers. A t}�pical settlement marker detail is shown on attached Figure 3. The settlement
markers should be installed on the existing grade prior to placing any surcharge fill. Once installed, elevations of
both the fill height and marker should be taken daily until t7e full height of the surcharge is in place. Once fully
surcharged, readings should continue weekly until the anticipated settlements have occurred. Monitoring cata
should be fonvarded to us for review when obtained.
It is criiical that the grading contractor recogniae the importance of the settlement marker �nstallations. Al]
efforts must be made to protect the markers from damage during fill placement. It is difficult, if not impossible,
to evaluate the progress of the preload progran� if the markers are damaged or destroyed by construction
equipment. If the markers are impacted, it may be necessary to install new markers and extend the surcharging
time period in order to ensure that settlements have ceased and building construction can begin.
Follow�ing the successful completion of the surcharge program,with foundations designed as recommended in the
Foundation Section of this report, maximuin total post-construction settlement is estimated at about 1 '/� inches
with differentia] moveinent of about one-half inch. If post-construction settlement of this magnitude is not
considered acceptable,buildings should be supported on a pile foundatioa.
5.3 Exca��ations
All excavations at the site associated with confined spaces, such as utility irenches must be completed in
accordance witn local, state, or federal requirements, Based on current Occupational Safety and Health
iAdministration(OSHA)regulations, soils found on the project site would be classified as Group C soils.
jFor properly dewatered excavations more than 4 feet but less than 20 feet in depth, the side slopes should be laid
'I back at a minimum slope inclination of 1.5:1 (Horizontal:Vertica]). If there is insufficient room to complete the
i excavations in this manner, or if excavations greater than 20 feet in depth are planned, using temporary shoring to
support the excavations may need to be considered. Utility trench sidewalls can be supported by a properly
I designed and installed shoring trench box,
Groundwater seepage should be anticipated within excavations ex#ending to depths of five feet and greater below
ehisting surface grades. For excavations below ten feet, the volume of water and rate of flow into the excavation
may be significant. Shallow excavations that do not extend more than two to three feet below the groundwater
table can likely be dewatered by conventional sump pumping procedures, along with a system of collection
trenches. Deeper excavation may require dewatering by well points or isolated deep-pump wells. The utility
subconh�actor should be prepared to implement excavation dewatering by well point or deep-pump wells, as
needed. This will be an especially critical consideration for any deep excavations, such as that which may be
required for lift station construction or sanitary sewer connections.
This information is provided solely for the benefit of the ow�ner and other design consultants, and should not be
construed to imply that Te�7a Associates,Inc. assumes responsibility for job site safety. Job site safety is the sole
responsibility of the project contractor.
Also, as noted earlier, the contractor should be prepared for encountering large boulder-sized bedrock fragments
within the existing fill below depths of four feet.
Page No. 6
December 7, 20Q6
Project No. T-5996
�
5.4 Foundations
ln our opinion, the bui]ding may be supported on conventional spread footing foundations bearing on undisturbed
subgrade composed of existing inorganic fill. Foundation subgrade should be prepared as recommended in
Section 5.2 of this report. Foundaiions exposed to the wea2her should bear at a minimum depth of 1.5 feet below
adjacent grades for frost protection. Interior foundations can be supported at any convenient depth below the
floor siab,provided immediate support is obtained on a minimum of two feet of structural fill.
We recommend designing foundations for a net allowable bearing capaciry of 2,000 psf. For short-tenn loads,
such as wind and seismic, a one-third increase in this allowable capacity can be used. Following successfui
completion of the surcharge program, with foundations bearing at a maximum depth of two feet below current
site grades and with the expected building loads, estimated tota] settlement should not exceed 1 Ya, inches with
differentia] settlement over a 100-foot building span not exceeding one-half inch.
If foundation depths will exceed two feet, stress imposed on the organic consolidaiing layer will increase. If
footing subgrade will exceed two feet below existing site grade, we should be noti�ed and asked to reevaluate
potential foundation settlement impacts.
For designing foundations to resist lateral loads, a base friction coefficient of 0.35 can be used. Passive earth
pressures acting on the sides of the footings can also be considered. E�Ve recommend calculating this lateral
resistance using an equivalent fluid weight of 250 pcf. We do not recommend including the upper 12 inches or
soil in this computation because it can be affected by weather or disturbed by future grading activity. This value
assumes the foundation wi]1 be constructed neat against competent native soil or backfilled with sh•uctural fill, as
�i described in Section 52 of this report. The values recommended include a safety factor of L�.
i
�
'� 5.5 Slabs-on-Grade
� Slabs-on-grade may be supported on the subgrade prepared as recommended in Section 5.2 of this report.
Immediately below the floor slab, we recommend placing a four-inch thick capillary break layer composed of
clean, caarse sand or fine gravel tnat has ]ess than three percent passing the No. 200 sieve. This material witl
Ireduce the potential for upward capillary movement of water through the underlying soil and subsequent wetting
I of the floor slab.
IThe capillary break layer will not prevent moisture intrusion through the slab caused by water vapor
� transmission. Where moisture by vapor transmission is undesirable, such as covered floor areas, a common
� practice is to place a durable plastic membrane on the capillary break layer and then cover the membrane with a
�I layer of clean sand or fine gravel to protect it from damage during construction, and aid in uniform curing of the
concrete slab. It should be noted that if the sand or grave] layer overlying the membrane is saturated prior to
pouring the slab, it will be ineffective in assisting in uniform curing of the slab and can actually serve as a water
supply for moisture transm:ssion through the slab and affecting floor coverings. Therefore, in our opinion,
covering the membrane with a layer of sand or gravel should be avoided if f oor slab construction occurs during
the wet winter months and the layer cannot be effectively drained. Placement of the concrete directly on the
plastic membrane may require adjustments in the concrete mix design and spacing of control joints to reduce the
effects of dry shrinkage. The American Concrete Institute (ACIJ Manual of Concrete Practice, Section 302.IR,
should be consulted regarding installation of vapor barriers and concrete slab-on-grade floors.
I Page No. 7
I
December 7, 2006
Project No. T-5996
For design of the floor slabs-on-grade,a subgrade modulus(k5)of I00 (pci) can be used.
5.6 Stormw�ater Detention Pond
The stonnwater pond �rill be located in the northeastern pan handle of the property. The pond perimeter �-i11 be
formed by cast in place concrete retaining walls. As we understand, the retaining wal] footings will bear at a
depth of about seven to eight feet below existing site grades.
Two test pits, TP-1 and TP-2, were excavated within the proposed pond area. In general, soil conditions
observed consisted or three feet of]oose to medium dense silty sand fill overlying fill composed of clayey silt
«�ith ���eathered bedrock pieces to small boulders. Beneath the fill, at depths of eight to ten feet, we observed the
original organic surface layer of bro��n organic silt to peat. At depths of 9 to 14.5 feet, we observed gray silt to
gray silty sand. We observed moderate to heavy groundwater seepage at a depth of i4 feet in the test pits.
To establish suitable support for the pond perimeter walls, it wi11 be necessary to excavate and remove the
existing fill and peat fi-om below the wall foundation. The excavation to remove this unsuitable material should
extend laterally from the footing edge a minimum distance of three feet. Once removed, the foundation grade can
be restored using structural fill placed and compacted as recommended in the Site Grading and Preparation
section of this report (Section 5.2). The wall footings can then be designed using soil parameters outlined in the
I'oundation section (Section �.5). The exception wilt be the lateral passi��e earth pressure resistance. Because
tne soils in front of the footing will be submerged below the stored water in the pond, the passive earth pressure
used should be reduced to 180 pcf. This value requires that the footing be backf`illed with structural fill and the
fil] extends horizontally in front of the footing a distance equal to the fooring thickness or depth below the pond
floor grade.
The magnitude of earth pressure development on the pond retaining walls will partly depend on the quality of
backfill. V�'e recommend placing and compacting wall backfill as structural fill. To guard against the buildup of
hydrostatic pressure; wal] drainage must also be installed. A typical wal] drainage de#zil is attached as Figure 4.
With granular backfill placed and cornpacted as recommended and drainage properly installed, we recommend
designing retaining wails for an earth pressure equivalent to a fluid weighing 35 pcf. When necessary, to account
for traffic surcharge, the wall should be designed for an additiona] height of iwo feet. If the a�alls cannot be
effectively drained,they should be designed to support an earth pressure equivaient to a fluid weighing 85 pcf.
5.7 DrainaQe
Surface
I
Final exterior grades should promote free and positive drainage away from the site at all times. Water must not
be allowed to pond or collect adjacent to foundations, or within the immediate building areas. We recommend
providing a gradient of at least three percent for a minimum distance of ten feet from the building perimeters. If
this gradient cannot be provided, surface w�ater should be collected adjacent to the structures and disposed to
appropriate storm facilities.
Page No. 8
_ __ �
December?, 2006
Project No. T-5996
5.8 Utilities
Utility pipes s:�ould be bedded and backfilled in accordance with American Public Works Association (APWA),
or City of Renton specifications. As a minimum, trench backfill should be placed and compacted as structural
fill, as described in Section 5.2 of this report. As noted, most of the existing fill and the underlying native soils
will be wet of optimum moisture when excavated. The utility contractor must be prepared to dry the soil by
aeration or amend with CKD, cement, or lime to stabilize the moisture to facilitate proper compaction.
Alternatively, or if utility construction takes place during the wet winter months, it may be necessary to import
suitable �vet weather fill for utility trench backfilling. Also, the utility conh-actor should be prepared for
encountering smal] to large boulder-sized fragments of bedrock contained writhin the fill in excavations that
extend to depths of four feet and greater. These boulder-sized fragments w�il] not be suitable for reuse in trench
backfill and will likely require off-site disposal.
5.9 Pavements
The pavement design section is dependent upon the supporting capability of the subgrade soils and the n�affic
conditions to which it v��ill be subjected. We expect traffic at the facility v��ill consist of mainly of cars and light
trucks, with only occasional heavy traffic in the form of t�-actor-trailer rigs. For design considerations, we have i,
assumed traffic can be represented by an 18-kip Equivalent Single Axle Loading (ESAL) of 50,000 over a 20- ''
year design life. V��ith a firm an unyielding subgrade prepared as i-ecommended in Section 5.2 of this report, we I
recorrunend the following pavement section altematives be used:
• Two inches of AC o�er three inches of asphalt-treated base (ATB)
• Two inches of AC over six inches af crushed rock base(CRB)
I In areas where Portland cement concrete(PCC)pavement will be considered, w>e recommend a minimum 28 day
concrete compressive strength of 4,000 pounds per square inch (psi) be used with a minimum un-reinforced
thiclrness of five inches. Control or construction joints should not be spaced at intervals of more than 20 feet.
Asphalt concrete should meet the requirements for %z-inch HMA, as outlined in ��Vashington State Department of
Transportation's (WSDOT) standard specifications. ,Asphalt-treated base and crushed rock base should also meet
WSDOT requiremenis.
Long-term pavement perforniance will depend on surface drainage. A poorly-drained pavement section will be
subject to premature failure as a result of surface water infiltrating into the subgrade soils and reducing their
supporting capability. For optimum pavement performance, we recommend surface drainage gradients of at]east
two percent. Some degree of longitudinal and transverse cracking of the pavement surface should be expected
over time. Regular maintenance should be planned to seal cracks when they occur.
6.0 ADDITIONAL SERVICES
Terra Associates, Inc. should review the fina] design drawings and specifications in order to verify that earthwork
and foundation recorrunendations have been properly interpreted and implemented in project design. Vl'e should
also provide geotechnical services during construction to observe compliance with ouz design concepts,
specifications, and recommendations. This wil] allow for design changes if subsurface conditions differ from
those anticipated prior to the start of construction.
Page No. 9
December 7, 2006
Project Iv'o. T-5996
7.0 LIMITATIONS
We pre�ared this report in accordance with ger.era]]y accepted geotechnical engineering practices. No other
wan�ant��, expressed or implied, is made. This report is the copyrighted property of Terra Associates, Inc. and is
intended for specific application to the Cedar River Corporate Park project. This report is for the exclusrve use
of TARRAGON and their authorized representatives.
The analyses and recommendations presented in this report are based on data obtained from the test pits
excavated on the site. Variations in soil conditions can occur, the nature and extent of which may not become
evident until construction. If variations appear evident, Terra Associates, Inc. should be requested to reevaluate
the recommendations in this report prior io proceeding with construction.
Page No. 10
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REFERENCE:1TH � � � i �;!!, � i� ,;:" �1/ � _ �.
OMAS GUIDE CD-ROM, KING/PIERCE/SNOHOMISH COUNTIES, 2004 NOT TO SCALE
��= Terra VICiNfTY MAP
CEDAR RIVER CORPORATE PARK
Associates, �IIC. RENTON, WASHINGTON
Consultants in Geotechnical Engineering
Geology and
Environmental Earth Sciences Pr'oj. No.T-5996 DBte DEC 2006 Figure 1
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NOTE:
THIS SITE PLAN IS SCHEMATIC. AL�LOCATIOhS ANC EXPLORATfON LOCATION PLAN
DIMENSIONS ARE APPROXIMATE.IT IS INTENDED FO
REFERENCE ONLY AND SHOULD NOT BE USED FOR CEDAR RIVER CORPORATE PARK
DESIGN OR CONSTRUCTION PURPOSES. RENTON, WASHINGTON '
REFERENCE:
SITE PLAN PROVIDED BY CLIENT Proj. No.T-5996 Date DEC 2006 Figure 2
STEEL ROD
PROTECTIVE SLEEVE
HEIGHT VARIES - ' .
SURCHARGE (SEE NOTES) ;. SURCHARGE
OR FlLL � OR FILL .
'i,. /,. i>/� i>. �. i, i, �. � ., i,/,/. �/., i,. ,. i
NOTES:
1. BASE CONSISTS OF 1!2"THICK, 2'x2' PLYWOOD WITH CENTER DRILLED 518" DIAMETER HOLE.
2. BEDDING MATERIAL, IF REQUIRED, SHOULD CONSIST OF CLEAN COARSE SAND.
3. MARKER ROD IS 1/2" DIAMETER STEEL ROD THREADED AT BOTH ENDS.
4. MARKER ROD IS ATTACHED TO BASE BY NUT AND WASHER ON EACH SIDE OF BASE.
5. PROTECTIVE SLEEVE SURROUNDING MARKER ROD SHOULD CONSIST OF 2" DIAMETER
PLASTIC TUBING. SLEEVE IS NOT ATTACHED TO ROD OR BASE.
6. ADDITIQNAL SECTIONS OF STEEL ROD CAN BE CONNECTED WITH THREADED COUPLINGS.
7. ADDITIONAL SECTIONS OF PLASTIC PROTECTIVE SLEEVE CAN BE CONNECTED WITH PRESS-FIT
j PLASTIC COUPLINGS.
8. STEEL MARKER ROD SHOULD EXTEND AT LEAST 6"ABOVE TOP OF PLASTtC PROTECTIVE SLEEVE.
9. STEEL MARKER ROD SHOULD EXTEND AT LEAST 1" ABOVE TOP OF FILL SURFACE.
�� Terra TYPICAL SETTLEMENT MARKER DETAIL
'` '' � � CEDAR RIVER CORPORATE PARK
•• Associates, It1C. RENTON, WASHINGTON
Consultants in Geotechnical Engineering
Geolo9Y and Pro No.T-5996 Date DEC 2006 Fi ure 3
Environmentai Earth Sciences 1• 9
12" MINIMUM 3!4"
�v11NUS WASHED
GRAVEL SLOPE TO DRAIN
12"� ? : '
.: _ :::....::... .:::. ......:.:..::.:.:.:..::....::�:......:..�...:.;......:...:�::.:..:... �;..,:
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' STRUCTURAL FILL ; ; �
, . �V� _
';s � . %.
,,�y�� j�
,- �
. ;�-,� S ; ,.
;
• .-,c'� ,
SEE NOTE �• c`s�; '\ EXCAVATED SLOPE
� ��� �� � �: ., �
;: ; ,�.
�y� (SEE REPORT TEXT
��.;`,� ,�,%� FOR APPROPRIATE
6"(MIN.)� • r;� ;!; INCLINATIONS)
��
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� ,�o � ,o.���o��,��,�, � �
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�3" BELOW PIPE
4" DIAMETER PERFORATED PVC PiPE
NOT TO SCALE
NOTE:
MIRADRAiN G100N PREFABRiCATED DRAINAGE PANELS OR SIMILAR
PRODUCT CAN BE SUBSTITUTED FOR THE 12-INCH WIDE GRAVEL
DRAIN BEHIND WALL. DRAINAGE PANELS SHOULD EXTEND A MINIMUM
OF SIX INCHES INTO 12-INCH THICK DRAINAGE GRAVEL LAYER
OVER PERFORATED DRAIN PIPE.
�
-:�- �� Terra TYPICAL WALL DRAINAGE DETAIL
CEDAR RIVER CORPORATE PARK
••• Associates, Ir1C. RENTON, WASHINGTON
Consultants in Geotechnical Engineering
Geology and Pro No.T-5996 Date DEC 2006 Fi ure 4
Environmental Earth Sciences 1� 9
i
APPENDI�A
FIELD EXPLORATION A'�TD LABOItATORY TESTIn G
, Cedar River Corporate Park
Renton,VVashington
On November l, 2006; ��-e perfor.ned our field explorations using a mid-size trackhoe. «'e explored subsurface
soil conditions at the site by excavating 8 test pits to a maximum depth of 15 feet below existing surface grades.
The test pit locations are shown on Figures 2. The test pit locations were approximately determined by
measurements from existing site features. The Test Pit Logs are presented on Figures A-2 through A-9.
An engineering eeologist from our office conducted the field exploration, classified the soil conditions
encountered; maintained a log of each test pit, obtained representative soil samples, and obsen�ed pertinent site
features. All soil samples ���ere visually classified in accordance with the Unified Soil Classification System
(USCS) described on Figure A-1.
Representative soil samples obtained from the test pits were placed in closed containers and taken to our
laboratory for further examination and testing. The moisture content of each sample was measured and is
reported on the Test Pit Logs. Grain size analyses were performed on four samp]es. The results are shown on
Figures A-10 through A-11.
�
i
�
�
Project No.T-5996
MAJOR DIVISIONS LETTER TYPICAL DESCRIPTION
SYMBOL
Clean ! GW Va'ell-graded grave�s, gravei-sand mixtures, little or no
GRAVELS i Gravels ' fines.
J � � (less than I, GP Poorly-graded gravels, gravel-sand mixtures, littfe or
O � N More than 5% fines) no #ines.
� �"� 50% of coarse GM Silty gravels, gravel-sand-silt mixtures, non-plastic
Q •` � fraction is Gravels fines.
� > larger than No.
z �.� with fines
� 4 sieve I GC � Clayey gravels, gravel-sand-clay mixtures, plastic fines.
0
0
� �N CIEBn SW i Well-graded sands, gravelly sands, litfle or no fines.
o SANDS Sands
� �Z (less than I Poorly-graded sands or gravelly sands, little or no
� � � I More than 5 ro fines) sP � fines.
Q �,� � 50% of coarse
Q �"" fraction is S(�/� Silty sands, sand-silt mixtures, non-plastic fines.
U g smaller than Sands i
� No. 4 sieve with fines SC Clayey sands, sand-clay mixtures, plastic fines.
� , ; Inorganic silts, rock flour, clayey silts with slight
`° I SILTS AND CLAYS M� i piasticify.
-� ��o , �
�o
O �N 'I CL i Inorganic clays of low to medium plasticity, (lean day).
E o � I Liquid limit is less than 50%
� o Z •N �L ' Organic silts and organic clays of low piasticity.
Z � � �
Q �"' � MH Inorg2nic siits, elastic.
� � a� �' SILTS AND CLAYS
C� —
W � � i C}-� lnorganic clays of high plasticity, fat clays.
Z � �n Liquid limit is greater than 50% ',
ii � QH Organic clays of high plasticity.
HIGHLY ORGANIC SOILS PT Peat.
DEFINITlON OF TERMS AND SYMBOLS
v� I Standard Penetration 2^ OUTSIDE DIAMETER SPLIT
w Density Resistar:ce in Bfows/Foot I SPOON SAMPLER
J
� I Very loose a-4 2.4" INSIDE DIAMETER RING SAMPLER
� Loose 4-10 � OR SHELBY TUBE SAMPLER
w I Medium dense 10-30
= Dense 30-50 1 Vti'ATER LEVEL (DATE)
� Very dense >50
Tr 70RVANE READINGS, tsf
Standard Penetration Pp PENETROMETER READING, fsf
Consistency Resistance in BlowslFoot DD dRY DENSITY, pounds per cubic foot
w
� Very soft 0-2 � LL LIQUID LIP�AIT, percent
w Soft 2-4
= Medium stiff 4-8 PI PLASTIC INDEX
� Stiff 8-16 N STANDARD PENETRATION, blows per foot
Very stfff 16-32
Hard >32
Tgrra UNIFIED SO1L CLASSIFICATION SYSTEM
� CEDAR RIVER CORPORATE PARK
' ASSOCIat@S, I�1C. ` RENTON, WASHlNGTON
ConsulTants in Geotechnical Engineering
Geology and
Environmer,tal Earth Sciences � P�Oj. No. T-5996 ; Dete DEC 2006 Figut'e A-1
LOG OF TEST PIT NO. 1 FIGURE A-2
PROJECT NAME: Cedar River Cor�.orate Park PROJ.NO: T-5995 LOGGED BY: DPL
LOCATION: Renton. VVashinaton SURFACE C�NDS: �rush APPROX.ELEV: N/A
DATE LOGGED: November 1.2006 OE?TH TO GROUNDWATER: 14.5 Feet DEPTH TO CAVING: N/A
ILL
o i �
� Z Z '
W CONSISTENCYi ^
_ ! -' DESCRIPTfON : a REMARKS
a � � RELATIVE DENSITY � i
o � uQi 3 v �
0
a
FILL:gray fo brown siity sand,roots,some asphalt rubble, Loose to
trace gravel,fine gr2ined, moist. tiiedium Dense 6.2
� �
I 25.3
5 FILL: blue gray clayey sitt with�veathered bedrock pieces Medium Stiff
to 3 feet in size,old roots,sticks,wet.
to Stiff
i
�
�
I
Brown organic SILT io fiberous PEAT,sticks,wet. (PT) Soft
10 ;
Gray Sf�T to clayey SILT,organic inclusions,moist to Medium Stiff
1 wet. {ML) to Stiff 43.7
�
i I
�
�
�
34.0
� Gray silty to clean SAND,5ne grained,wet. (SM/SP) Medium Dense
_ �
�F Tesi pit terminated at 14.5`eet.
Moderate groundwater seepage observed at 14.5 feet.
,
�
20 � ;
,,� Terra
NOTE: This subsorface iniormation pertains only to this tesi pii iocalion and should ,',��h� Associates, �I1C.
not be inlerpreted as being indicalive of other locations al t�e site, ! Co�sultants in Geotechnical Er.gineerinc
ueology and
Env.ron^�ental Earth Sciences i
�
LOG OF TEST PIT NO. 2 FIGURE A-3
PROJECT NAME: Cedar River Comorate Park PROJ.N0: T-5996 LOGGED BY: DPL
LOCATION: Renton.Washinctor, SURFACE CONDS: Brush APPROX.ELEV: N/A
DATE LOGGED: November 1.2006 DEPTH TO GROUNDWATER: 14 Feet DEPTH TO CAVING: N/A
LL
N
o i �
� Z
2 ' � DESCRIPTION CONStSTENCYi i e a REMARKS
� I a RELATIVE DEhSITY i -- �
3 W
0 '. � Y
� U
O
a
FILL:gray to brown silty sand,roots, trace gravel,fine Loose to
grained,moist. ��tedium Dense 11.6
5
� 19.0
FILL:gray browr.to blue gray silty sand to sandy silt, Medium Stiff
weathered bedrock pieces beiow 7 feet,moist to wet. ,
to Stiff
�
Brown organic SILT to fibe�ous PEAT,wet. (PT) Soft 152.2
77.0
10
Gray c3ayey SILT,organic inclusions,wet. (MUCL) Medium Stiff 55.9
Gray silty SAND,fine grained,wet. (SM) Medium Dense
_
- 28.7
15 Test pit terminated at 14.5 feet.
Moderate groundwater seepage observed at 14 feet.
2-inch slotted PVC standpipe installed.
20
:��a�
Terra
NOTE: This subsurface informalion pertair,s on�y to this test pit location and should �_ -��"z�� ASSOCIat@S� �t1C.
, not be interpreted as being indicative of other locations at the site. Consultams in Geotechnical Engineering
Geology and
Environmental Earlh Sciences
LOG OF TEST PIT NO. 3 FIGURE A-4
PROJECT NAME: Cedar River CerRorate Park PROJ.NO: T-5990 LOGGED BY: _DPL
LOCATION: Renton.Washingfon SURFACE CONDS: Brush APPROX.ELEV: N/A
DATE LOGGED: November 1,2006 DEPTH TO GROUNDWATER: NfA DEPTH TO CAVING: NiA
I a
� I y
0 ~
Z
s ; � I DESCRIPTION CONSISTENCY/ � a REMARKS
a I REIATIVE DENSITY I — �
W Q I , � x
O � V
i a
FILL:gray brown to brown silty sand wiin gravel,roo;s,
9.4
some smalt siicks,f+ne grained,moist. Loose to
Wledium Dense
5
FI�L:reddish-brown to bfue gray clayey sandy silt with 25.6
weathered bedrock pieces,small to medium large pieces
� of bedrock.wet.
Medium Stiff
to Stiff
i
i ;
�
t i
� � ;
J
I I
1
S� Brown organic SlLT to fiberous PEAT,smali sticks,wet. 189.5
(PT) Soft
�
Light grayish-brown clayey SILT,orgaoics,wet. (ML/CL) � Medium Stiff 106.3
Test pit terminated at 13 feel. II
No grou�dwater seepage observed. i
15 �
���
Terra ,
NOTE: This subsurface inicrrnation per.ains cnlyte this test�it leca!ion and shculd �;;:�� Assoeiates, �I1C.
not be i�terpreted as being i�dicai ve of ot�e•Iccations at the sR> ConsuHants:r Geolechnical Enginee�ing
Geology and
Em�ironmental Earth Sue�ces �
LOG OF TEST PIT NO. 4 FIGURE A-5
PROJECT NAME: Cedar River Corrorate Park PROJ.NO: T-5996 LOGGED 8Y: DPL
LOCATION: Renton. Washinaton SURFACE CONDS: Brush APPROX.ELEV: N;A
DATE LOGGED: November 1.2006 DEPTH TO GROUNDWATER: N/A DEPTH TO CAVING: NIA
�
N
O t
x � DESCRIP710N CONSISTENCY; � a REMARKS
F a RELATIVE DENSITY , — �..
w e 3 "'
� t4 Y
� I U
O
I a
(6 inches brown organic SILT/ROOTS)
i
FILL:browr silty sand with gravel to sandy silt with broken Loose to 4.2
� up bedrock,fine grained,moist.
Medium Dense
i
�
5
FILL:brown to ligh;brown sandy dayey silt with broken up 11.1
bedrock pieces,lots of bedrock pieces to 4 feet in size:
moist. Medium Stiff
to Stif�
�
10 117.2
Brown organic SILT to fiberous PEAT,small sticks a�d
small logs,wet. (PT)
Soft 100.8
149.1
Light gray/ciayey SILT,organic inclusions,wet. (ML)
Medium Stiff 48.8
Test pit terminated at 14 feet.
15-7 ho groundwater seepage observed.
�
i
20
Terra
NOTE: 'hrs subsur(ax informatwn pertains only to this test pit iocalion and stwuld � ASSOCI$t@S� �IIC.
not be interpreted as being indicalive of olner locations at the site- Consultants in Geotechnical Eng�neering
Geology and
Environmen;al Earth Sciences
LOG OF TEST P!T NO. 5 FIGURE A-6
PROJECT NAME: Cedar River Cornorate Park PROJ.NO: T-5996 LOGGED BY: DPL
LOCATION: Renton Washington SURFACE CONDS: Brush APPROX.ELEV: N/A I
DATE LOGGED: November 1 2006 DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: NiA �i
�
�
o ' ~ �
� Z Z
�
x � DESCRIPTION i CONSISTENCVi e � REMARKS
� a RELATIVE DENSITY � — F
w ¢ � "'
0 � Y
U
O
� a
(6�nches black organic SILTrRCOTS) � I
FILL:brown to grayish-browr sandy silt w:th gravel,a few '
�arge boulders;broken bedrock pieces with depth to 1.5 Loose to i 20.4
feet in size,wet. Medium Dense �
�
;
;
� I
5
18.4
FILL:blue sandy clayey sitt with bedrock pieces,small to
very large sizes,occ2siona!wood to small iogs,tivet. tv�edium Sti(i
to Stiff '
i
I
i
_ �
71J I
10 I
Brown organic SILT to fiberous PEAT,some sticks to Soft
small logs,wet. (PT)
Light gray clayey SILT with organics,wet. (ML)
� Medium StiH 76.6
Test pit terminated at 14 feet.
15 Siight groundwater seepage observed at 9 feet.
20 �
Terra
hCTE This subsurface information pertains only to this tesi pit iocabor�and should Associates, �I1C.
not be irnerpreted as being indicative o�other locations et the site. Consultants ir Geotechnical Engineering
Geology and
E.�vironmental Earth Sciences
LOG OF TEST PIT NO. fi FIGURE A-7
PROJECT NAME: Cedar River Coroor2te Park PROJ.NO: T-5996 LOGGED BY: DPL
LOCATION: Renton.VVashin,r,�ton SURFACE CONDS: Br�sh APPROX. ELEV: NiA
DATE LOGGED: November 1.2006 DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: N!A
LL
� r,
� �
Z
x � DESCRIPTION CONSISTENCY! � a REMARKS
f. a RELATIVE DENSITY �- r �
w Q � Y �
O h V
O
j a
i
FILL:gray silty sand with gravel,fine grained,some �
debris,moist. Loose
FILL:brown to gray sandy clayey siit with bedrock pieces
to 2 feet in size,sticks,moist. Medium Stiff 15.2
5 `
!
FILL:blue clayey sitt wi:h small to large bedrock pieces, Medium Stiff �
small logs,mo�st to wet.
to Stiff �7.5
_
90
i
� 86.3
{ Brown organic S1LT to fiberous PEAT,we?. (PTj Soft
-� 257.1
Gray clayey S�LT,organics,wet. Medium Stiff
Test pit terminated at 14 feet.
15 Heavy groundwater seepage observed at 9 feet.
I
2c
T� Terra
N�TE: -his s.,bsu�iace information pe�tain=only to 1hi5 test pit localien and should � Assoeiates, �f1C.
not be interpreted a=_being�ndicalive of other local�ons at the site Consul;ants in Geotechnical Engineering
Geotogy and
Environmenlal Ear.h Sciences
LOG OF TEST P1T NO. 7 FIGURE A-8
PROJECT NAME: Cedar River CorRorate Park PROJ. NO: T-5996 LOGGED BY: DPL
LOCATION: Renton. WashinQfon SURFACE CONDS: Brush APPROX.ELEV: N/A
DATE LOGGED: November 1.2006 DEPTH TO GROUNDWATER: 10 Feet DEPTH TO CAVING: N/A
I LL
i N
— o �
z
F � DESCRIPTION CONSISTENCY! e �a i REMARKS
RELATlVE DENSITY --
Q � 3 ~
w
Y
U
O
a
(6 inches brown organic SILT)
�
FILL:brown sandy silt with gravel,fots of weathered
bedrock pieces to cobble size,old roots,sticks,moist.
19.6
� Medium StiH
to Stiff i
_I
�
5�
i I
i
FILL:reddish-brown to blue sandy silt to clayey silt,large
weafhered bedrock pfeces,moist to wet. tJ�edium Stiff
to Stiff
_ ��—� 45.0
Brown organic SILT to fiberous PEAT,sticks,small logs,
' wei. (PT) Soft � 112A
I
�
Blue silty SAND fine grained,wet. (SM) Medium Dense 25.7
Test pit terminated at 13 feet.
Siight to moderate groundwater seepage observed at 10
feet
15
i Te rra
,�
NOTE. This subsurface in(o�mation periains only to this test pit locatior and should ASSOCidt@S, �11C.
not be interpreted as being indicative of other locations at the site, Consullants in Geotechnical Engineering
Geology and
Environmental Earth Sciences
I
LOG OF TEST PIT NO. 8 FIGUREA-9
PROJECT NAME: Cedar River Cornoraie Park PROJ.NO: T-599fi LOGGED BY: DPL
LOCATION: Renton.1Nashinqton SURFACE CONDS: Brush APPROX. ELEV: N/A
DATE LOGGED: November 1. 2006 DEPTH TO GROUNDWATER: 10 Feet DEPTH TO CAVING: N!A
LL
� ~
Z
x I � DESCRIPTION CONSISTENCY! ( � a REMARKS
� a RELATIVE DENSITY ; — �
� vai � � U
i j O
(6 inches brown organic SILT)
FILL:brown sandy silt with gravel and wea!hered bedrock
pieces,roots,wef.
Medium StiH �
to Stiff 18.1
5
�
1 20.3
I
FILL:blue ciayey sitt with weathered'oedrock pieces, Medium Stiff
some pieces to 3 teet in sizes,moist.
to Stiff
= 10
86.8
Brown o�gar.ic SILT to fiberous PEAT,roots,sticks,lo6s, i Soft '
� thin clay seems,wet. (PT) � I
I
I I
103.4
Blue silty clayey SAND,fine grained,wet. (S�v1/ML)
Medium Dense 46.1
15
Test pit terminated at 15 feet.
Slight groundwater seepage observed at 10 feet.
20 '
Terra
NOTE: This subsur�ace informalion penains only lo this test pit location anC shou�d Associates, �I1C.
nol be interpreted as being indicative o+other locations at the siie. Consultanis in Geotechnical Engineenng
Geobgyand
Environmental Earth Sciences
• �-� .
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APPENDIX B �
TEST PIT LOGS BY OTHERS
'il
�i
I
�
„,�,.�...._..,:.r.._.,..e,... .,..,.,,.,.<n-._�.�....._..z.��n.,__,._.,_.,...�..r�.,,,��.......�...M..,..�....,�..�..,..,Y...x-..�...�...,..a,...�.,,.��,.,�.�_.,.,�,�.......,,...�....�
Ex.ploratiUn No. 1
0-1.5 9rown Sil�y Sand (SM) (���:�derately dense, damp) ( fi�l }
1,�-R�5 �rawn to B 1 ue Gray 5 i 1 t wi th ara vel , cabb 1 es & bou 1 ders
(;�L) with occaslonal piece of woud (mad�r�ately tiersc� wet)
(fill } rock is granular
5�'epd�e dt 8.,5'.
�„5-13, 5 �ro4:n Gryanic �i1t f0[_) �Nitt� Fray:nents or decayed woo� &
�ege�a ti on to 6” s i_e.
1�.5-1b.5 Gr�ay Si 1 ty �ine Sand (SM'1 {�oderat��'y dense wet).
Grades fine and less siTty,
Compl�ted 3/28/85
Sample Depth ( ft) Moi stui-e C�r�tent �
11.5" 140
Explorati�n No. 2
C-5.5 Mixed Brown Silt and Gravel (ML-GM1 with angular cobbles
'i and boulders. (fill )
' Change to bl ue at 2.5` ar�d w9 th rock to 200 1 bs.
Caving at 4,5' .
Seepage at 6' . --
0 5.5-10 Cobbl es and Boul ders wi th Si 1 t,
z rock to 800 lbs, at 7'
.� Sorne woody debris at 8` .
0
�', 10-10.5 4lood debris, organic siit and vegetation. Terminated due
to boulders and heavy caving
Completed 3/28/75
!, Sample Depth (ft) Moisture Content �
0 10' 262
a
� W
3
W NOTES:
>
� T) Depths in feet.
2) Fie7d eng�neer: R�ger Lowe
3) Excavation using a EXPLORATION LOGS
Ford 75.5 backhoe ATLAS GEOi�ECHNI�AL
� 4) Moisture content is a PROPOSED OFFICE/WARENOUSt
> percentage of tt�e sample ENGINEERING INC.
"' dry weight. PROJECT, RENTION, WA
z
3
' � PtATE 2
� �
� a ,_. e..�..t.....�
Exploration No. 3
0-10. 5 8��wn Gra��el',y, Cobb�y Silt (NL) ( fili )
Char:ge to blue-gray celor at 2.�'
Heavy seepage at 7`
Water leveis 6, 25' 3/28/75
Test pit nat cpe� icn5 �nouch �Far vrater level to
stab;lize.
10.5-15.5 orown Organic S � I t a:�d Si 1 ty °eat i1✓N/P7] (.moderatz�y
soft, noist? (decayed vey�tation?
15.5-1? Gray Si 1 t wi th Qrgani c DeSri s (ML/MH ) ;medera Le 1 y -Fi rm,
we t} .
17-18 Dark Gray Fine �il`y Sand (SMi (moderately d�nse, wet)
Com�leted 3/28/BS
Sampie Depth (ft) Moisture Content %
14 216
�
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0
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0
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3
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1
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E?�PLORATION LOGS .
ATLAS GEO�ECHNiCA� � p��pOsEo oF�icE/wARE�ou�E
�
ENGINEE�RiNG iNC :,,.' : ' ��o��cT, RENTAN, t�;�
. . �� . . . . .. .. .4::� . • ' � _
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3
: PLATE 3
II
_....._ � .�._._.�
i
Expioration Nc. 4
0-3.5 Brown Sandy Si7t (P4L) with rocks & cobbles (moderatly
dense, camp fill )
3.5-8.5 Blue Grave] and Cobbles (maderately dense, saturated)
(fill ;
'rJater at 3.5 feet, neavy f i ow.
Large boulders, 200 lb� at 6'
8. 5-9 arown Oryanic Silt (h!L ) (moderately soft, mcist)
ftopsoil ) .
9-15 Gradational change to A1i:ernating Brown Orgai�ic Si1t arid
Peat (MH/PT}, peat layers to 8" tfiick.
15-17.5 Dark Gray Si1i;y Sand (SM) (Mo�lerately dense, weti
(6" tl�ick silt 7ayer at 16.5).
Completed 3/28I85
Sample llepth ( Ft) �io�stu��e Content (:�)
8.5 120
10 320
li 153
. 16.5 - 47
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EXPLORATION LOGS
ATLAS GEOTECHNICA` PROPOSED OFFICE/WAREHOUSE
ENGINEERING (NC. p�OJECT, RENTON, WA
0
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0
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Explorution Nc. 5 �
�
0-9 Brown Sandy Graveily Si1t {ML) ���ode:rately dense, �c�ist) �
ifill ) 3
t
(
l��ith rock frayments at 3 feet �
nGC,� tC ��?��!` ��.)S ':d7 '��1 �� i 011'y' (;li.i�lls7 Ol' c i �.:J F�2�`.. �
i '
4J;Ler at ; ,
�
� y--i2 3ro��n and Gray si 1 t ?tiL) wi;,h �Y'�7di7iC- r�^agr��c��,ts �
�a�';c G,-a" n�e�i�m $and ICp1 ,;�j �-li _. Y.r�ce r�f s�l T ft�rci�r- �
a't�=1�/ densc, aret) �
. �
i2-1? Darl: Gray Ptedi ,�in Sand (SP) wi i:� a trace �3� s i i t �
{moderately dense, we�.) . ;
Inc� Gdes ��ry Silt layers (PiL) tr��derately `rirm, 1u:7�; and �
�r�ces of or�:an�c :�a*erial beleia 15 ;�e.et, '
i
Expl ora;.i on fdo. 5 .
Q-; 6ro��n Sandy and Gravelly Si1t �.i�lt) with rock fr��men�ts j
(rr,oderately firm, rr;oist} (fiii� '
;,
i '
� Rocky at 4' , i
� 9 �
� � � 7-8 Broken rock (fili ). K
1I . �
� 8-9 Organic material at 8' .
I �
0 9-10,5 Brown Peat (NT) (moderately firm, saturated; �Gr,-�L 5il �t �
� (ML) {moderately firr�, saturated) +�
a
� ° 10.5-12 Brown Peat (PT) (moderately f9nn, saturated} �:
1
, r
� � 12-17 Gray Si7t (ML) tmoderately firm, saturated; ;
�. � wi th occasional 1 ayer•s of peat at 13.5'. ;
� Completed 3/28/05 4
� `
� m Sample Depth ( ft) 1•;o��sture Content � �
a II 236 q
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. � EXPLOR.ATr01� '��}GS �
I ATLAS GEOTECHf��CAL PROPOSE�3 ����E/WAREH011SE,.
• ENGINEEF��NG If�C. PROJECi', .���a�oN, wA
}
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Q �......�..�__�- ----- -- ..���.,,..�.�...�....v.�.�
Explc�ratier No. 7
0-3.5 Brown Medi um Sar:d (S�) wi th si i t (r�.o�erate l y dense, dcmp)
(fil� )
3. 5-? Qrown Si 1 ty Gravel ��P1) f�ense damp)
Change to bl ue at o', iJater flowing in at 6'
� ,--n u i;.ie R���i:y ;i i 1 , ; ,_ , . , - ..�
, 1ueil�Ci t �i8ii: u:yyiily/ �
� ; ,'. � ., �
idi, C7 ;'t';�^� T?'.':il ='':' .", f
°-O �r�!�!n Orna�ic Silt (�4H,1 (moderately f;rm, saturate�) �
i ��1-1�,5 ut'dGdLlOfie� i;(id!'lyc tU VrO�Vi� 'r'c::�i. iF+� l�0uciai,E7 �r rli(", �
saiuraied)
�2.5-�8 Dark B1 ue Gray #�iedi u�r Sand (SP-S;•1) wi th si 1 t
Complet2d 3/28/85
Sarr,�le Depth ( ft) f�1oi sture Content b �
8 87
Ex�lcratien No. 8 �
0-2.5 Brown Silty Sand (SM} with roots (moderately dense, moist?
(fill )
' Asphalt chunk from 2.5 to 3.5'
� -
� , 2.5-3.5 Blue-Gray Gravelly Silt (ML) with rock fragments (dense
moist) (fill )
3. 5-9 Brown siit (ML) with occasional rocks and fragmerts of
o vegetation. (fi11}
' z
m 9-9,� Black Grganic Mat
� o .
j 9,5-14.5 Brown Peat (PT)
Seepage at 12` grades with si3t beiow 12.
14.5-?0. 5 Gradat�ona� change to Gray Si 1 t (P1L) wi th sor�e er;anic
, debris, {moderately dense, saturated)
i, � Trace of sand at i6.5.
, o Terminated at 16.5' due to obstructions that limited
o excavation. � �
W
3 Completed 3/28/85
� W
�
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�
EXPLORATION LOGS
ATLAS GEOTECHNICAL pROPOSED OFFICF/WAREHOUSE
,
ENGINEEftiNG INC, pROJECT, RENTON, WA
4
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3
I � PLATE 6
1 � �
Exploration No. 9
0-3 Brown San�y S91t (ML) (fill }
3-4.5 Blue Rocky Fill {very dense? hard digaing.
4.5-9 Silty Sandy Gravel (GP1) (very dense, wet;� ( fill )
� ,�,..�. .,� .. ,..,. s i'F4"' �._ -- - .:� C.�.
� KL'C'KS lU 1,�� � I2� ct Ly 1 l. , ' �
� '�V J ri:i`i. `�7'_ 1 n'`� l:�r ��j �
� fi00a G2ii1';5 �u o'' �i ci�it i.ci d3
1
� `_'-1�.F �'�"J��Jf! �c3 i ��T� �. ,`,.i? �i �� �i i0�i�i 8�?��, rl"ii'� �c�l:i^�'t?�� �
i4. 5-17 uraCational cliange io i��lixed Peat anc Gray �i i i ;PTI1�iH;
;firm saturated;
17-I� Gray Sil � ;?•?Hi r�ith oryanic frz��rents. (1'oderat2ly firm,
saturated?
Conpleted 3/29/85
Sample Depth (ft) Moisture �or,tent %
10 102
11 1$5
12.5 193
17 44
0
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� EY.PLORATION LOGS
� ATLAS GEOTECHNICAL PROPOSED OFFICE/WA�ENOUSE
ENGINEERING INC. PROJECT, RENTON, wA
- �- - _ .
m
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� 3 PLA7E 7
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i �
Exp?o~ation No. 10
Q-8 Brown Sandy Gravelly Silt (h1L) (dense, moist) rccks to 18"
( fi31 )
Chai�ge tc bl ue at b'
Seepage and sor�e cavi ng at 6'
� S'-i ':1��7.�' T� I ! � .. I LI! .)i .r.
j �xp i crati on r i�ooeci, �eti��_re cav-i r�G 4
� '��c�'e i.d�;Dfl iiia i, !
!
� 7_n.J �.yJ. c;.�r_ �^.r��.�nl I�D) lmn;�or??��v !{PnSF'. S3�U1'di.C�� �
I �
' 9.5-1��.5 �r'own Feai ancS �i 1 i ii'�I i�i}{) r
Chunk of partially decayed wo�d at 1Z,5 �
14.5-15 Gray Fine Gravel (GP) (moderately dense, saturaLed) �
16-17.5 �+.ixed Peat and Silt with Peat (PT/P1H)
17.5-18 Dark Gray Silty Sand (S��1) (moderately dense, �•ret)
Completed 3/29/85
Sample Depth (rt) Mo9sture Content %
10 147
11 133
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I � EXFLORATION LOGS
� ATLAS GEOTECHNICAL PROP05ED OFFICE/WAREHOUSE
, ENGINEERING INC, PROJECT, RENTON, wa
m
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Io PLATE 8
Exploraticn i;o. 11
C-1 .5 Brown Sandy Gravel ly Silt (ML) lMo�erately de��se, damp)
(fill )
1. 5-�,� Rccicy Fill arit;� Si't
Color change to blue at 4.5'
E %.5-v t� I:fCK oraani� uia �����;�1 . �
� c4-1'� �1'Oklll �1Y'OdlliC �Jl I � l!�,;; r;'ii.ii Cf'�i;���i� i:ic:Lc. , �� _ ! +.' �..r, 3
� u::M, , �;=+� i
� Il1-il uT'c�;id�l.1011d� ��id!iG� i,:i Li"J�rili I'tdL l^lJ il�iGucl":,i:� �j Lli ."':� �
0
R101 5 t�
11-:3, 5 Gray Si 1 t �I�L-�•9H) (wi th fragmen vs ef organi c materia 1 �
(;noderatel y f�rm, noi st? :
1�. 5-14.5 Dark Gray Sa�d (SP) with sor�e si � t (moderately derse,
saturated)
Completed 3/29/85
Sa;n;,le �epth (ft) Moi sture Content % _
5,5 96
�'
10.5 258
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FXPLORATION LOGS
ATLAS GEOTECHNICAL PROPosED oFF�cEiWAREHOL'SE
, ENGINEERING INC. PRo�ECT, RENTON, wA
m
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3
� PLATE 9
o �
Exploration �o. '2
�-3.5 Brown Sandy Silt (ML1 (�oderately dense, dampl (fill )
wi th som2 recks at 2'
3.5-8 Gr�wn and Blue with Orange Lay�rs, Sandy Gravelly Cobbiy
�ilt (A1L) (moderately dense, mo�st) (fill )
.
� S-8.5 RCCky f171 - I;eavy f-io�r1 of •���a.er i
1 Rock io 2 ' x 2 1/L' �
1� �.�-� �,_.,�. ,�., • .. �
U Iu..l� 'IC��: L.'�: :.I VI! IIU'+..
i ~ /
9-10.5 Broti��n Organic S; i t (i�1h) (��oderately ��2nse, sat�.�raien) �
�
i0.5-11.5 Gray silt (ML) (moderately d�nse, saturated) �
�1.5-15 Gray N�edium Sard (SP) (moderately dense, sa�:uratedl
15-15.5 Gray Silt (h1L) (mederately dense, saturated)
15. 5-16.5 Gark Gray Sand (SP) ;Moderately dense, saturated)
Completed 3129!85
; Exploration No. A
0-b.5 Brown Medium Sard (SP) (maderai:ely dense - �oose, moist)
(fill ) (cavinr�)
' Vegetation mat at 6.5,
�
', z 6.5-9.0 Brown Peat (PT)
m
� ° Ter�nination @ 9' due to severe caving �
i
, � Completed 3/29/85
, �
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m
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I 3 � �
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� �
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�
� EXPLORATICh LOGS
AT�AS GEOTECHN?CAL �ROPOSED OFFICE/WAREHOIJSE
r
ENGlNEERfNG lNC. oRo�ECT, RENTON, wa
Q
Z
3
' ; P�ATE 10
i o
2A. Addendum to Geotechnical Report
�
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' ■ ��.�l1 f \������ ■ ��� � 11i1.s
" Consultants in Geotechnical Fnbineerinc, Geolosy
_ and
Environmental Earti� 5ciences
Fenruary 22,2447
Proj�ct'�1o.T-599b
Mr. Mu7phy McCullotigh
TARFtAGON
]000 Second Avenue, Suite 3200
Seat��e, Washingtor. 9810�4
'�I Suuject: Geolechnical Repor"t Addendum
Cedar 12:ver Corporate Park
�� Renton,Washington
� Reference: Geotechnical Report,Cedar:ti4er Corporate Park,iZenton, tiVashington, Project �;o. T-599b,
prepared by Te3-�-a Associates, Inc., dated Decembe:7,200b
Dear I�'Ir. McCullou�h:
li� As �ve understand, desi�n buiiding elevations for the subject pro}ect have Uee�: revised since compleiion of the
! referenced geotechnieal report. The revised btiilding elevations �vill require t)ze exisring site �rades be raised fou_
to five feet by placement of fi]1 material.
��I
�� Raisi�i� site grades as planned is geotechnica)ly feasible and will actually eliminate the need to implemenl a
I surcharge pro�-am to �nirigate differentia] building settlements as recommended�` in the referenced report.
Considering the thicEmess of the fill matenal, it is also our opinion that stripping of the near-surface topsoi3 layer �
li ��ill not oe necessary prior to f!1 nlacement. We recommend that the site be cleared and grubbed v�nth surface
�� vegetation sh•ipped and removed; however, the remova] of tlie reninant topsoil wil] not be necessary, V�'e �
recommend that tlie surface oe tilled and recompacted to a firn�and sf.able condition prior to fill placernent.
�I ' ve �e ' w� � nsotidate com ress the eat ar.d
Placemer,t of new fll mater,al to achie i v�sed construction �nades ill o or p p
soft aIluvium tfiat underlies the existing fill at depths of eight to ten feet below current site g.-ades. We i
recommend that placement of the fill material be treated as a preload and that the consolidation sett]ements be ,
aliowed ta occur prior to building construct�on. Tl:is approach is similar to the surcl�arge recomn�endations ; I
presented in the -eferenced geotechnical report with the exception that the f:l' :naterial nwst be placed and I,
� a le su o oors site avements. Estimated I
com acted st�-uctura-11 to rovide su�t b p rt forbuiidiii foundations, fJ ,anci p
P Y P P g
tatal settlement under the �veight of this four to fi�e feet of fiil material falis in the range of;our to six inches u�ith
time ef consolidation extending for approximately three to four„-eeks.
,
I
12525 Willows Road, Suite 1C1, Kirkland, Washington 98034
�i
Phone (425) a2i-7777 � Fax (425) 821-4334
----,_-;�- �,�-:�.
����� : : . �- �ERRA A►SS��i�1TE5, tnc. �,
• Con;,iltants ir Ge�tecnnical En��neering, Geafo�y I
ancl �
Environmental Ear�h Sciences '
I
I
May 3,ZOG i
Project No.T-5996-1
��Ir.Jeff Fogarty
TARRAGON �
i000 5econd Aveniie,Si►ite 3200 I
Seatt:e, Vl'ashin�ton 98104
Subject; tile.cl:anicaI Stabilized rarth (MSI:}Va'a�Is
Sto���water Detention Pond
Cedar IZ:ver Corporate Par1c
Rer.ton,`t�'ashington
References: Geoteclu�ica; IZeport,Cedar River Corporate Park, Renton, Washington,
nrepared by Tcrra Associates, Inc., �ated Uecember 7, 2007 �
Dear htr. Fo�arty: '
As rcquested, we have completcd a design for constnicrion of VISE walls for the suUject project. "�'he walls �vill
�e constructed to form the perimeter of thc storrmvater ae:entian pond. The design is based on soil conditions as
ot�tlined in the reFerenced report and on civil plar.s pmpared by AI�BL,dated March 23, 2U07.
The MS� �vall will 't�e faced initial:y�vith ecalogy blocks. After expected setklemenis have occurred, a shotcrete
wali facing �viil be a�plied to foim the finished �call surfaee. Constniction details for the �valls are sha�vn in
section Qn atkached Figure t. nll eartl�wor�: associated �vitli constr:�crior: of the waIl nwst be completed in
accnrdance w•ith recommendations outlined in the referenced reporl. V�'all design calcularions are also attached
for building official reuie�v.
VJe trust the inf'ormation prese�ited is sufficient for your ctirrent needs. If youu have any ques[ions or reyuire
additional �tio��,����Lca(l.
�g�=� "�,� .��.,3�.
Sincere�ti� , ��, ���_ �
TE ` ' O ��, , Y
I
`;c� ,� ,, �3-`L 7
. r
T eodo
1'resident ,fyc�t�
Enci: �'�,�� ^ Of�'���� ch�mcra ' Stabilized Earth(Iv1SE)Wati Dctails
r r-esi�r:��-a�c�;at�s--�
3
I 2525 VVillows Road, Suite 1��, Kirklanc�, 4Vashington 98034 �
Phone{�25) �21-7777 • Fa� (4�5; 8?'-433�? I
5'SHO�G�E1E
5"SH07GRE1=
6'X6'W2.9%W2.9 LYELDED n'IRE TCP CF REINFOFCeD
6"XG'4V2.9XYJ2.8 YlELCED WIRE A1ESH HELO 2"OFF FRCf.!ECOLOGY
MESH NELD 2'OFF F}7061 ECOLOGY 2'�rkA'ECOLOGY ECvIOGY BLCX:K Y:ALL
DLOCK V1ALL FAGE. ,�,;,,,,,,,,, BLOCK WALL FAGE- BLOCK{TYP.j �
a,K..: s.rv vu • .
'Q ' '� 12' I
"' G1A%.4YRTE75URFAGE� � . � �
t.IAX.'/JAIhkSURfACE nr.n •�
LILv�t.a �. •' , � ..
. '.
t. .1
"" '_" ___""""""""'^'"""""""_"""'"""..
�� 2X7k�'EC��OGY 6LOCK5 D�a'LEA'GTH HEADEO � � 17;'--
;O 0'LENGTH HEI�DED �' STUp SPACE Z vtk2TICo1 2'X2'%a'=COLOGY eL6CN5
STUp SPACE 7 V�RTICAL � ANO A'MORIZONTa1 ' � y'CRUSHED ROCK-NO FWES • k �
lU:D 4'HORIZONTFI 2"CRUSHEC ROCN-NO FINES �. . �
� fi'EMBE�IN 3LOCK GROU7 '
..-- - '�-•--------
--------------------------------
6"EMBED IN BLOCK GROUT �� � 17��� USING�IA611TE EPOI(Y � \,
USING OIAMITE EPDXY - � GROUT OR EOUAL ���� - � '
GliDUT OR EO'JAL �1; �� � � VP..R�ES ,i.,� . ScTRUCTURAL FILL. i
� ����� � �� . �, � �
1, .. ::
l_ --`5'�. . 72-(MIN. _ � I
r' -'-' -- -^ ---;---'-------"""-r--------...""""i . .,i, ' ' '-- ,_ a.S •
- �.S'- � 1 _= , 24'O OR]0"�STEEL f
�!• ' �.. ' SLEE`JE°CR 18'O OR �
1?" 'L� 1.'fRAF]5XT OR EOUNALE!JT 24'�STORM PIPES
�:.k -�',--, �MIRaFI 5XT GR EOUNF.LEtJT i. ����: — ------- ------ -- - -- -
',.:. '
��• �� �• ��'---- '---'--' ----- - ' ---•"--- -' ----
.i, . . � ._.. „'
. ' ------^""'-'---------••---- ---'--'-- � �.�c .
�� IDE FLEX CHECK VALYE '`' , TI�E FLEk CHE[K VALVE 2'O C PIPE H£EPHOLE
'�� ,�- - � �'�� I ERTELEV 1725
•;�. `•,', S7RUCTURAL FI�L . ��� � �' . � . � � � ` � - •� INVEFT ELE'Y 14"5
.,.: ' - ""___. ------'---------"-------------"-------'
) 1� '
' --'- ---' --�------'--'----'----"--""-"'-'---"--"'--. ., . . ` •. ... :
t . . Crv��n ..� � . - . 7 ' . � � .
"�"" i, - 2'O PVC tdEEPNOLE SPACcDAT6GEn1TER5 i 1 4 :.r•. . ' "I I
_:._�
---- W[RT ELEV.1435 r. . � � .
2'O PVC W EEPHOLE SPA�EO�T 6'GEN7ERS . • 4 I i .i
IN1iE9?E_Eb. 14.25 l� � �h � � � I 1 •I I
.�� �._. . .." """' '_' . _ . '_ 1_—^_____�___l. �_._.._ �—,.L________i
h_—___
�F� .
PEAT S7RUC7URAL FiIL � 61IqAFl HP57U CAST iN PLACE
PEAT STRUCTURALFIL� �� Idif7AFl HP570 � 5, � -� PEAT IAYER IdINIfdUf.1 COldPRESSIVE
S� � Fr'AT LAYEA 5'RENGTH 900�PSI CONCR=_"fE
NATNE CLAYEY SILT Tp SI?T`�SAND
NAifVE CLAYEV SIL?TC SIL7YSANC
NOT TO SCAL�
NOT TO SCALE NOT TO SCALE
ECOLOGY BLOGK WALL DETAIL 1 ECOLOGY BLOCK WALL DETAIL 2 WALL FRONT ELEVATION
� J.��
NOTES: O��oF W A
1.)REFER TO CIViL GRADING PLANS FOR WALL ALI;,NMEVTS AND ELEVATIONS. `� -- �' 2„��
Ir� � ��T
2.)ALL STRUCTURAL FILL TO BE CpMPACTED TO 95%Of SO1LS MAXIMUM DRY � z:�
DENSITY PER ASTM D-698,STANDARD PRaCTOR. �
3.}HEAVY CONSTRUCTION EQUIPMENT SUCH AS VIBRATORY ORUM ROLLERS, p ,f, 2 , 42 9 ���
LOADED DUMP TRUCKS,FRONT-END LOADERS,ETC.,SHALL NOT OPERATE '��S�C15'1'ERw Gti�
WI7NIN 5 FEET OF BACK OF WALLS. STRUCTURAL FILL PLACED!N''HIS ZONE +S'Ia1�1r�L,�
SHALL HAVE MAXlMUM L005E LIFT�HICfCNESS OF'2 INCHES!',ND SHALL BE a
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4.j fIGHT LINE WALL DRAIN TO Mf RPPROVED POINT OF CONTROLLED QISCHARGE.
5)WALL FACING SHOTCRETE SHOULD INS"ALLEQ AFTER PRI1+/�ARY CONSOUDATION �;� Terra MECHANICALLY STABIUZED EARTH
PS COMPLET�0. ..,::.,.��`��` (MSE} WALL DETAILS
•� ASSOCI�teS It1C. CEDAR RIVER CORPOF2ATE PARK
ConsuNants in Geote�hrical Erg:neering RENTON, +NASHINGTON
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3. Traffic Report
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14 QQ � Q
Renton
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Pre ared for
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Murphy McCuilough, Senior Development Manager
TAR RAGO N
1000 Second Avenue, Suite 3200
Seattle, WA 98104
December 11, 2006
���$ ���, Mark J.Jacobs, PE, PTOE, President
�" #° �°� 77318t"Ave.SW - Seattle,WA 98106-2007
JAKE TRAFFIC Tel.206.762.1978; Cell. 206.799.5692
ENGINEERING, INC. Facsimile 206.762.1978
Email-jaketraffic@comcast.net I
1 � . Jake Traffic Engineering, Inc . Mark J. Jacobs, PE, PTOE
President
7131 8�"Ave SW - Seattle, WA 98106 - 2001
� Tel. 206.162.1918 - Cell 206.799.5692 - facsimile 106.762.1918
E-mail jaketraific @ comcast.net
December 11, 2006
Murphy McCullough, Senior Development Manager
TARRAGON LLC
1000 Second Avenue, Suite 3200
Seattle, WA 98104
Re: Cedar River Corporate Park - Renton
Traffic lmpact Analysis
Dear Mr. McCuilough;
We are pleased to submit this Traffic Impact Anafysis for the proposed Cedar River Corporate
Park project in Renton. The proposed project would provide a total 142,434 sq. ft. to be
developed as follows
➢ Building A: 34,615 sq. ft.
➢ Build+ng B: 29,751 sq.ft.
� Building C: 33,551 sq. ft.
➢ Building D: 44,517 sq. ft.
We understand that the proposed development is to be comprised of �60% warehousing use
and �40% office use. The project site is located east of Lind Ave. SW and south of SW 215t
Street. Access to the site is proposed via two driveways on Lind Ave. SW; the north driveway
likely to be limited to right in/out only and the south driveway providing full access.
We have conducted a field review of the site and surrounding street system. The study scope
was determined pursuant with our correspondence with Kayren Kittrick, Development
Engineering Supervisor of the City of Renton. The following arterial intersections are
analyzed in this report:
➢ Lind Ave SW/SW 16ih St.
� Lind Ave. SW/SW Grady Way
In addition the site access intersections are evaluated in this report.
Frontage improvements to SW 21St St. and SW 23rd St. are not proposed. City code requires
an explanation to why frontage improvements are not provided along Wetland Permitting
prepared a Wetland Analvsis, Stream Classification and Shoreline Master Pro ram
Apqlicabilitv Report dated October 18, 2006. This report identified both SW 215t St. and SW
23�a St. as wet{ands thus makingfrontage improvements on SW 215t and 23�d St. not
practical.
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J�'E, �r��.
Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11. 2006
Page -2-
The general format of this report is to descnbe the proposed project, identify ex�sting traffic
conditions (baseline), project future traffic conditions and identify Agency street/road
improvements (future baseline), calculate the traffic that would be generated by the project
and then add it to the future baseline traffic volumes. Operational analyses are used to
determine the specific project traffic impact and appropriate traffic mitigat�on measures to
reduce the impact. Additionally Agency traffic impact fees are addressed in this report.
The summary, conclusions and recommendations begin on page seven of th�s report.
PROJECT INFORMATION
Figure 1 is a vicinity map showing the Iocation of the proposed site and surrounding street
network.
Figure 2 shows a preliminary site plan prepared by AHBL. The plan consists of the site layout
developed into four buildings as identified earlier in the report. Parkfng for 459 vehicles is
provided. Access to the site is proposed via two driveways on Lind Ave. SW; the north
driveway likely to be limited to right in/out only and the south driveway providing full access.
Full development and occupancy of the proposed Cedar River Corporate Park project is
anticipated to occur by 2008/2009, presumingthe permits are issued in a timely manner.
However, to ensure a conservative analysis 2011 has been used as the horizon year.
EXISTING ENVIRONMENT
Proiect Site
The project site is presently undeveloped.
Street Svstem
I'� Figure 3 shows the existingtraffic control, number of street lanes, number of approach lanes
at the intersections and other pertinent information. The primary streets within the study
area and their classifications per the City� of Renton Comprehensive Plan are as follows:
➢ SW Grady Way Principal arterial
➢ Lind Ave. SW Minor Arterial �
➢ SW 16th St. Collector Arterial I
➢ SW 19t" St. Unclassified �,
➢ SW 215i St. Unclassified ',
Traffic Volumes I
Figure 4 shows the existing PM peak hour traffic volumes for the analysis intersect�ons.
Trafficount, a firm that specializes in the collection of traffic data, collected the existing PM
��.,[n(�nn�]�n-P�ytn Fiv5�30p60)9.C�v�.Niver fppenle Mn.Tsr.Kann�CMa•F..e�TKOx
JTE, Inc.
Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11, 2006
Page-3-
peak hour turning movement count at the analysis intersections on the date shown in Figure
4. The count data sheets are attached in the appendix.
Transit Services
We reviewed Metro Transit website (www.transit.metrokc.gov)for bus services in the vicinity
of the proposed project. Metro bus routes #153, 161 and 247 provides service along Lind
Ave. SW in the vicinity of the proposed project. Additional information on these routes can be
obtained on the Metro Transit website.
Intersection Oqerations
Traffic engineers have developed criteria for intersection operations called level of service
(LOS). The LOS's are A to F with A and B being very good and E and F being more congested.
LOS C and D correlate to busy traffic conditions with some restrictions to the ability to choose
travel speed, change lanes and the general convenience comfort and safety.
The procedures in the Transportation Research Board Highway Capacity Manual, 2000 were
used to calculate the level of service at the study intersections. The following table depicts
the LOS and corresponding average delay in seconds at signalized and stop control
intersections:
Intersection Level of Service
Type
A B C D E F
Signalized <10 >10 and >20 and >35 and >55 and >80
<20 <35 <55 <80
Stop Control <10 >10 and >15 and >25 and >35 and >50
<15 <25 <35 <50
LOS Criteria
Conversation with City of Renton staff identified that no LOS standards is set in the City of
Renton. However, the desired LOS is LOS 'D' with the acknowledgement that a number of
�ntersections in the City are fully developed that do not lend themselves to further
improvements.
LOS Analysis Software
The LOS of the study intersections were calculated using the following software program:
%- SIGNAL 2000 by Strong Concepts (signalizedl
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Murphy McCullough, Senfor Development Manager
TARRAGON LLC
December 11, 2006
Page-4-
➢ Highway Capacity Software ,'HCS1 2000 by McTrans (stop controlj
Accident Historv
Fieid review of the site and study intersections did not reveal any apparent accident
probiems. The City was contacted via e-mail (on 11.14.06) inquiring of any k.no�vn problems;
no response was provided.
STREET IMPROVEMENT PROJECTS
We have reviewed the City of Renton's web site at(www,rentonwa.�,ov)for a listing of City
street improvement projects. The data on-line provides the "Six Year Transqortation
Improvement Program 2005 - 2010" (attached in the appendixl for street improvement
projects in the vicinity of the proposed project. The foilowing improvement projects are
identified in the vicinity of the proposed project:
➢ Grady Way Corrfdor Study, TIP number 35, project cost estimate is $3,300,000.
➢ Lind Ave. SW from SW 16th St. to SW 43rd Street, TIP number 45 and project cost
estimate is $2,555,000.
Per discussion with City we understand that the City�s Lind Ave. SW TIP project wouid widen
the existing street to five lanes at sections where five lanes do not currently exist and provide ,
pedestrian improvements at sections where needed.
HORIZON YEAR C�NDITIONS"WITHOUT"THE PROJECT
Figure 5 shows the projected 2011 PM peak hour traffic volumes "without" the project. ',
These volumes include the existing traffic volume counts plus background growth. A growth
factor of two percent per year was applied based on WSDOT historic traffic �olumes at the SR ,
- 167 after the SW 43�d St. rarnp (mile post 24.77). The actuat growth factor calculated was
less than two percent per year (--1.1%,), thus utilizing a two percent per year growth factor li
ensures a conservative analysis. I
TRIP GENERATION AND DISTRIBUTION I
Definitions
A vehicle trip is defined as a singie or one direction vehicle movement with either the origin
or destination (existing or entering) inside the proposed development.
Traffic generated by development projects consists of the following types:
Pass-By Trips: Trips made as intermediate stops on the way from an origin to
a primary trip destination.
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JTE, inc.
Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11, 2006
Page-5-
Diverted Link Trips: Trips attracted from the traffic volume on roadways within the
vicinity of the generator but require a diversion from that
roadway to another roadway to gain access to the site.
Captured Trips: Site trips shared by more than one land use in a multi-use
devetopment.
Primary(New)Trips: Trips made for the specific purpose of using the services of
the project.
Trip Generation
The proposed Cedar River Corporate Park project is expected to generate the vehicular trips
during the average weekday, street traffic AM and PM peak hours as shown in Table 2. The
trip generation for the project is calculated using trip rates from the Institute of
Transportation Engineers (ITE) Triq Generation, Seventh Edition, for Warehousing and
General Office Building(ITE Land Use Code 150 and 710, respectively). All site trips made by
all vehicies for all purposes, including commuter, visitor, and service and delivery vehicle
trips are included in the trip generation vatues.
Warehousing and General Office generate predominantly primary trips. There wouid be some
captured/pass-by trips that already exist within the vicinity; such as mail delivery, garbage,
and other service/delivery traffic. Based on our traffic engineering experience we have seen
captured/pass-by trip rates of 5 to 10 percent for office and warehouse uses. For analysis
purposes we have applied a 5%factor that we believe to be conservative.
Based on our analysis,the trips generated by the Cedar River Corporate Park project are
calculated to be 999 net new daily and 119 net new trips during the PM peak hour. For
analysis purposes we have used 125 trips during the PM peak hour.
Triq Distribution
Figure 6 shows the site generated traffic assigned to the street system. Trips to and from the
site were distributed to the surrounding street network based on the characteristics of the
street network, existing traffic volume patterns, the location of likely trip origins and
destinations (residential, business, shopping, social and recreational opportunities) and
previous traffic studies.
HORIZON YEAR CONDITIONS "WITH" THE PROJECT
Traffic Volumes
Figure 7 shows the 2011 PM peak hour traffic volumes "with" the proposed project at the
analysis and site access intersections. The site generated PM peak hour traffic volumes
shown on Figure 6 were added to the projected background traffic volumes shown on Ffgure
5 to obtain the Figure 7 volumes.
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Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11, 2006
Page-6-
Level of Service
Table 1 shows the caiculated LOS for the horizon year (2011) "with" and "without" project
conditions at the pertinent intersections. Based on our analysis the analysis the Lind Ave.
SW/SW 16t"St. would continue to operate at LOS 'D'for both "with" and "without" project
conditions. The Lind Ave. SW/SW Grady Way intersection would operate at LOS 'E' for both
"with" and "without" project conditions.
The northbound to eastbound movement at the Lind Ave. SW!SW Grady intersection is
currently a yield controlled movement. Our field reconnaissance indicate that an add lane is
provided for the northbound to eastbound movement thus making it a free fiow movement.
Repiacing the yield sign with an add lane sign to properly facilitate this movement is
suggested. The added lane sign is used to indicate a free flow movement and would improve
(reduce vehicle delay, as seen in Table 11 the operation at the intersection.
The Manual on Uniform Traffic Control Devices, 2003 Edition, Section 2C.32 Added Lanes
Signs (W4 - 3, W4 - 6) identifies its guidelines in installing add lanes signs as follo�vs (taken
from the Manual on Uniform Traffic Control Devices):
Section 2('.32 :�dded Lanc Si�is t�1'�-3.���.1-fi i
c;uiJ:�nrr:
1�hr AcIJ�J L:ine 11�'�-3i sign fst�Fi_�u� _'C-!,),hc�ttl�l h�, in��ail�:�l in a�h;in.c �:I a ��r,�ni ��hrr� i�.�,�
ro:�JuaY���m�cr�*�:ind n�cr,lin�� n�o�•cmcnt,arr tii�l rcyuirr�l. �1'li�n �x»,il,l�. ihc ,�dd�d (.:tn�: :ivr� ;l�ou1J h;
E�lacc.l .uch thal it i� �-i�ibic lrom huth ro;idu:iy.: ii this i.• no1 p.�s,ihk..ui:��Idcil L�nr,i��n,houl�l he��la��•J r�n
lllr �iJc��l�aeh rua�lu';iv.
�1`h�n an Aclilcct L:u3c sign i, tu h�in>��lled on a ri�a�c�:iy that i-UI"V�S It�It�{-N l'iHl�'CC�I11L Nl[I7:I110llltti'
rr�:�J��ay lhat Itar:�t;�n,�cnt uii�*nmcnt at ih��x�i�t ul�cut�vcr��enct. Eiti• Enl��rin_ Ru:�d«�.�� �JJcc1 I.<�n�•tti�'-I-��
:igtt 1<c�Fi�*ur: '('-(;��h��ui�l LL us��i!tu hru�r�>rtrac Ihc ci.tu:il ;_�:�,ni�uic c„n�liii��n� in rn;id u;�n��n Ih.
�ur�ing rna.IN:i�
,� ��
�,<.,
Site Access
Access to the site is provided via two driveways on Lind Ave. Southwest. The north driveway
is likely to be limited to right in/out only due to the proximity to the Lind Ave. SW/SW 215t St.
intersection. Having fufl access at the north access intersection would create a conflict
between the northbound to westbound and southbound to eastbound left turn motorists.
Thus limiting the north access to right in;'out would provide better operation. The south
driveway would provide full access. I
For analysis purposes we have assigned all the project trips to use the south site access to II,
Lind Avenue Southwest. Based on our analysis the south site access intersection is
expected to operate at LOS 'C' or better for all movements. The north site access would
operate satisfactorily based on traffic engineering judgment and inspection.
\\Fryinesll\e\-�rq�a fXnu006.019.Ce��r r.ive.Cnoo.aw oan�-�exon\CeOv�ive.tutex
Jl'�, 1��.
Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11, 2006
Page-7-
We have reviewed the WSDOT Desi�n Manual, May 2001, Figure 910-8b "Lett Turn Storage
Guidelines (Four Lane, Unsignalized)"for the Site Access intersection. The data indicates
that left turn storage is not needed at the site access intersection with Lind Avenue
Southwest. The City has a project to ultimately provide a two way left turn lane on Lind Ave.
SW from SW 16�"St. to SW 43rd Street; reference TIP number 45. Left turn channelization is
not needed to serve the subject project; thus the existing 4 - lane street section is sufficient
to serve the site.
Traffic engineering review/inspection of the traffic volumes on Lind Ave SW in the site vicinity
indicate that consideration of a 3 - lane street section in lieu of the existing 4 - lane street
could be made. The operation of the south driveway with a 3 - lane street would be slightly
better than with the 4 - lane street. City TIP number 45 to widen to 5 - lanes and improve
Lind Ave SW has a project cost estimate of$2,555,000 that could be reduced if a 3 - lane
street section was determined to be appropriate.
If a 3 - lane street section was determined appropriate the existing curb along the sites
street frontage to Lind Ave. SW should remain unchanged and thus stay put.
AGENCY TRAFFIC IMPACT MITIGATION REQUIREMENTS
The City of Renton requires a traffic impact fee for new developments based on the number
of new average daily trips generated. The current fee is $75.00 per new average daily trip.
The proposed development is projected to generate 947 net new daily trips thus contribute
�74,925 (999 net new daily trips x $75j towards the City of Renton's transportation
improvement program. Lind Ave SW is identified in the City's street improvement program;
thus credits agafnst the traffic impact fee may be available.
SUMMARY, CONCLUSIONS AND RECOMMENDATIONS
This report analyzed the traffic impact of the proposed Cedar River Corporate Park project
generally located east of Lind Ave. SW and south of SW 215t Street. Existing traffic data was
collected at the pertinent street intersections identified for analysis. Future horizon year
traffic volumes were derived using a growth factor of three percent per year. Level of service
analyses were performed for existing and projected future horizon traffic volumes. The
evaluation of the traffic impact of the proposed project included adding project generated
traffic to the future traffic volume projections and calculating the level of service. The "with"
project traffic operations were then compared to the "without" project operations. The
comparison of traffic operations "with" and "without" the project identified that the project
would not cause a significant adverse affect on the operation of the study intersections.
Based on our analysis we recommend that the Cedar River Corporate Park project be allowed
with the following traffic impact mitigation measures.
1. Construct site in accordance with applicable City requirements.
,��nCi.+ee.T��c- . .est-x'6.Oi= ceoar.t�.e.o�,c e��Far. ia,eg�i._coa 3i..r.L..�..
�'�'�, 9�c.
Murphy McCullough, Senior Development Manager
TARRAGON LLC
December 11, 2006
Page -8-
2. The north site driveway on Lind Avenue Southwest should be restricted to right
in/out only operation due to poor off-set with the C�ty Lind Ave. SW/SW 215�Ave.
intersection to the north.
3. Construct frontage improvements to Lind Ave. SW per City code criteria leaving
the existing curb along the site's frontage. The existing 4 - lane street section is
sufficient to serve the project. Our initiai street section analysis indicates that
converting the 4 - lane street to 3 - lanes as potentially viable.
4. Maintain the existing `non-built out" condition of SW 215t Street and SW 23�d �
Street right-of-ways (ROW's). Wetlands exist within the SW 215�and 23�d Street j
right of ways that makes street frontage improvements not practical; see Wetland �
�
Analvsis. Stream Classification and Shoreline Master Program Appiicabilitv
Report.
�
5. Contribute towards the City of Renton traffic impact mitigation fee program.
6. Replace the "Yield" sign on the northbound to eastbound movement at the Lind
Ave. SW/SW Grady Way intersection with an "Added Lane Sign" in accordance !
with the MUTCD criteria. '
No other traffic mitigation should be necessary.
Please contact me at(206) 762-1978 or email me at iakeiraffic@comcast.net if you have
any questions.
�o W h ti��
J' Sincerely,
�
y x
� Mark J. Jacobs, PE, PTOE, President
JAKE TRAFFIC ENGINEERING, INC
/ �< ��- �� C
MJJ:cvv �8 �
� ,_ E.t . _,. .� ,r�_. �
J�'E, �n�.
PM PEAK HOUR LEVEL OF SERVICE
TABLE 1
CEDAR RIVER CORPORATE PARK - RENTON
TRAFFIC IMPACT ANALYSIS
2011 W/ PROJECT
INTERSECTION APPROACH EXISTING 2011 W/0
PROJECT
Existing Added Lane
Sign
Lind Ave. SW/
SW Grady Way Overail D (47.0) E (57.9) E (59.9) E (55.5)
Lind Ave. SW/ Overall C (22.4) C (25.3) C (26.0)
SW 16th St.
Existing 4 Re-striped to
Lanes 3-lanes
Site Access Intersection SBLT - - A (9.1) A{g,1j
� wg - - C (19.5) C (17.01
Number shown in parenthesis is the average control delay in seconds per vehicle for the �
intersection as a whole or approach movement, which determines the LOS per the Hi hwa
Caqacitv Manual. I
2- Replacing the "Yield" sign (currently existing)for the northbound to eastbound traffic movement
with an "Added Lane"sign.
��,E�[�...z�a-anw�.e.V�.o�v.c.er m.o co.ro�.�e v.�..rv�•e��t.a�x,....r.a«
J�'�, �n�.
VEHICULAR TRIP GENERATION
TABLE 2
CEDAR RIVER CORPORATE PARK - RENTON
TRAFFIC IMPACT ANA�YSIS
TIME TRIP TRIPS TRIPS TOTAL
PERIOD RATE ENTERING EXITING
Warehousing(ITE Land Use Code 150, 85,459 sq. ft.)
Average Weekday T = 4.96X 212 (50%) 212 (50%) 424
AM Peak Hour T = 0.45X 31 (82%) 7 (18%) 38
PM peak Hour T = 0.47X 10 (25%) 30 (75%) 40
General Office Building(ITE Land Use Code 710, 56,975 sq. ft.)
Average Weekday T = 11.01X 314 (50%) 314 (50%) 628
AM Peak Hour T = 1.55X 77 (88%) 11 (12%) 88
PM peak Hour T = 1.49X 14 (17°�0) 71 (83%) 85
�:
Tota I
Average Weekday - 526 526 1,052 (9991)
AM Peak Hour - 108 18 126
PM peak Hour - 24 101 125 (119)
T = trips
X = per 1,000 sq. ft.
A vehicle trip is defined as a single or one direction vehicle movement with either the origin
or destination (existing or entering) inside the study site.
The above trip generation values account for all the site trips made by all vehicles for all
purposes, including commuter, visitor, recreation, and service and delivery vehicle trips
1 Applied 5%captured/pass-by trip percentage to account for trips that already exist within the vicinity
(ie, mail delivery, garbage, and other service/delivery traffic).
�\Enp:+Mr]\c'•-Ne/�tt fi4s V006.0�9�Ge✓H��N COrpM�e isry�furn�on\CeeaiNn�i��l�x
�`�'�9 �n�.
�aoo - ----7-----�--------- --- --- - --- -
! ;-
, / � - - - -----,-----
I 600 1�F� -�-_._ ._...�.____— ----- -----+---- -----i----�----+---�--
, `�`, ' � � � i
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,
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> , �, `�,`��. I I ,
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; i
�f 200 ------- - — ----- ---�--- i
�' J � .
� 1 �� Site access/Lind Avenue SW ' -
� f000 SBLT's: 13 ` '
--�_______.-------.
� � ; �� Opposing Through Volume: 685
o soo i - '--__'.�..._�___ -�- — �-------j _�.
�-�- I `'� � '
� i i
�0 600 i + � - ---- --- -
, �`
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�', ' sa' \ s. . s� S's s. � j :
; � \ �� \ fl� ?pr `'�p�
2t?0 $�- � . ._.,.__,�_ ' ' �
�_.... �_....__... .__----'� ....,._.__ __.__.____.. ' �. __. .
_._._ \ �.._..�._._—�_.._.__--- ,
� ` ; � j ;
� _y__..'_.�'L_-.� �___ _- _ '_ L-.,.-_'�'•__"____'..��-'�"_�
0 �Q 10� 15C3 �200 25C 300 350 400 4�0 500
Left Tuming Volume (DH�'i
S = Left-Turn storage�en�th
LeR-Turn Storage Guide(ines(Four-Lane, Unsignalized)
� Fipure 910-8h
Inrerseciions Ar G�ade Desip�r Manua! M 22-01
Page 910.20 January 2005
�,,<<<. - , .F�n.z:�=,.� �.a .,.�«�.��.,, ...�„��,.,..,, �«
Project: Cedar River Corporate Park - Renton
Location: East of Lind Ave. SW and south of SW 21�Street.
NORTH
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CEDAR RIVER CORPORATE PARK - RENTON
�TE, ��'1�. TRAFFIC IMPACT ANALYSIS
FIGURE 1
VICINITY MAP
Project: Cedar River Corporate Park - Renton
Location: East of Lind Ave. SW and south of SW 21�Street.
NORTH
� ___._- -- ----- �
:`k . ... .. . . ._. . L... . . _.__ . ._._.--_�- . . . .
�-_ /. _ ." ' . -_ - —, . ,_.. ._.. ...� . _...
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^I I i ' ' f 1� E3LDG A - 34,615
��� � � — � i ,BUIIiDING I� ; ' � ,
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�1 I� � � � ' i � Ji2' • � (�U1 �� � \�-_ BLDG D - 44.517
� � � _ : -- ---
q � ' � p� _ — I �-- � 'f �TOTAL - 142,434 S.F.
. �
__ _ _
31 I � I --- 90' �- 63' 1 � � � �� � I I 142.434/541,725 = 26.29�
N�
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FIGURE 4
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1��, �11K:w CEDAR RIVER CORPORATE PARK TRAFFIC IMPACT ANALYSIS - RENTON
FIGURE 5
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FIGURE 6
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TRAFFICOUNT, INC.
P.O. BOX 2508
RENTON, WASHINGTON OLYMPIA, WASHINGTON 98507 File Name : JTE30401P
LIND AVE SW 360 491-8116 Site Code : OOOi"-"
SW GRADY WAY � � Start Date : 10/? 6
LOC#01 JTE06303M Page No 2
LIND AVE SU1�' SW GRADY WAY LIND AVE SW SW GRADY WAY
From North From East From South From West
StarlTime Right Thru left ADD�ToUI Right Thru left App.Total � RigAt Thn, �eR � App.Totai Right � TAru Left �. App.Total � Int.Totai
Peap Hour from 04:00 PM t0 05:45 PM-Peak i of 1
Imersedion 04:30 PM
Valume 29 281 140 450 31 742 205 918 534 533 173 1250 97 1083 193 1373 a051
Percerrt 6.4 62.4 31.1 32 J5.9 21.0 42.7 43.4 13.8 71 78.9 141
OS:OOVolume 8 77 46 131 10 189 48 247 147 151 48 346 24 266 35 325 1049
Peak Faaor 0.965
High InL 05�00 PM 04�30 PM 05:00 PM Oa:45 PM
VOWme 6 77 46 131 7 795 62 264 147 151 �18 346 24 282 55 361
Peak Factor 0.859 0.926 0.903 0.951
�IN A '_ W
Out In Total
767 450 12'i
29 281 14D
i RigM 'hru left
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I
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Q<< o L 1 10I3 V2006 430:OC PM / ?p �� o
� �~ 10;31;2006 s:?S:OC PM �_N � <
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cn—
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Lett Thru Right
?73 543 534
583 1250 1839
Out in Total
��JND P.VE S'.ti'
r%'
TRAFFICOUNT, INC.
P.O. BOX 2508
RENTON,WASHINGTON OLYMPIA, WASHINGTON 98507 File Name JTE30401 P
S� DY WAY (360) 491-8116 Site Code : 0000000�
Start Date 10/31/2006
LOC#01 JTE06303M Page No 1
Groups Printed-PRIMARY
LIND AVE SVV SW GRADY WAY �IND AVE SW S1N GRADY WAY
From North From East From South From West
StartTime Right Tbru Left Tmck a�� Right Thru Left Truck Ap� RigM Thru Le1[ iruck A�p' Right Thru LeR TrucM App �tlu. Inclu. Irt
Total Total TMaI Total Total Total Tcta�
Factor 1.0 10 1.0 1.0 1.0 1,0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Oa:OOPM 10 70 25 8 105 11 i60 56 17 2Z7 169 69 30 12 268 20 2a7 31 11 298 a8 898 ga6
04:15FM 15 61 24 7 100 7 154 46 8 2C7 181 73 32 8 286 24 279 61 12 364 35 957 992
04:30PM 7 62 25 3 94 7 ]95 62 13 26S 152 114 39 9 305 . 23 279 40 9 342 35 1005 1030
04:45PM � BO 39 2 126 7 167 49 ]0 243 106 142 44 11 292 24 282 55 8 361 31 1022 1053
Total 39 2�3 113 21 425 32 696 213 48 941 � 608 398 145 40 1151 91 1087 187 40 1365 1G9 3862 »031
OS:OOPM 8 7� 46 7 131 10 189 48 8 247 147 151 48 4 346 24 266 35 8 325 27 SOa9 10?6
OS15PM ? 62 30 8 99 7 171 46 4 224 129 736 42 9 307 26 256 63 2 345 23 975 958
05 30PM 4 68 31 0 103 9 209 53 13 270 116 120 36 5 272 21 240 42 8 303 26 948 5:3
05 45PM 3 39 29 3 71 9 174 60 9 243 113 116 35 � 264 17 279 55 7 351 24 929 953
Total 22 246 136 18 404 : 35 742 20i 33 984 505 523 161 23 1189 88 1041 195 25 1324 100 3901 400�
GrandTotal 61 519 249 39 829 67 1438 420 82 1925 1113 921 306 63 2340 179 2128 382 65 2689 249 7783 8032
ADprCh% 7.4 62.6 30.0 3.5 74.7 21.8 � 47.6 39.4 13 1 6.7 79.1 14.2
Totai% 0.8 6.7 32 10] 0.9 18.5 5.4 24.7 14.3 ll 8 3 9 30.1 2.3 2�.3 4.9 34.5 3.1 96.9
LIND AVE SW SW GRADY WAY LIND AVE SW Sb'V GRADY NJAY
From North From East From South From West
Stan Time Right Thru . Left AVP.TMai RigM Ttrcu Lefl AOP.ToUI Hight Thru � Left App.TOWI I Right T�ru � .eft App.Total InL Total
Peak Hour From 04:00 PM ta 05�45 PM�Peak 1 af 1
InterSeCtion 04�,30 PM
Volume 29 281 140 450 31 742 205 978 534 543 173 1250 97 1083 193 1373 4051
Pereent 6.4 62 S 31.1 3.2 75.9 21A 42 7 43.0 13 8 7.1 78.9 14.1
OS OOVolume , 8 '7 46 131 10 189 48 24? 147 I51 48 346 24 266 35 325 1049
Peak Fador G 965
High Int. 05�.00 PM D4:30 PM 05:00 PM � 04:45 PM
volume 8 77 46 131 7 195 62 264 147 151 48 346 24 282 55 361
ik Fador 0.859 0.926 0.903 0 551
Peak Hour From 04:00 PM to 05:45 PM-Peak 1 of 1
By Approach 04:45 PM 04:45 PM 04:30 PM 04�15 PM
Volume 26 287 146 459 33 755 196 984 534 543 ll3 1250 9; u 05 .91 �352
PerceM 5J 62.5 31.8 3.4 76] 19.9 12.7 43.4 13.6 6.3 79.5 13 7
HigA Int. 05:00 PM 05:30 PM 05:00 PM 04.15 PM
�oiume 8 77 46 131 9 208 53 270 14? 151 A8 346 24 279 61 364
Pea+Factor 0 875 0.9i1 �J 903 p 556
\i--
TRAFFICOUNT, INC.
P.O. BOX 2508
RENTON, WASHINGTON OLYMPIA, WASHINGTON 98507 File Name : JTE30402P
�IND AVE SW 360 491-8116 Site Code : 0000(""'"
SW 16TH ST � � Start Date : 10/31
LOC#02 JTE06303M Page No : 2
UNO AVE SSN SW 16TH ST LIND AVE SW SW 16TH ST
From North From East From South From West
StartTime Right Thru Left App.Totai Right TAru left . App.Total �� Right Thru Left App.Total Right Thru left App.Total Irrt.7otal
Peak�oui From D4:0�PM to 05�.45 PM-PeaN 1 of 1
intersection 04 30 PM
Volume 49 420 162 631 395 74 9 478 9 558 66 633 75 139 266 480 2222
Dercent 7.8 66.6 25.' 82.6 15.5 1.9 1.4 86.2 10.4 15.6 29.0 55A
OS:OOVoiume 13 105 41 159 101 24 2 12' 2 171 18 191 il 43 69 129 606
PeaMFaclor � � 0.9t7
High Int 04:d5 PM 05:00 PM 05:00 PM 04:30 PM
volume 8 107 S6 161 101 24 2 127 2 171 18 191 - 23 35 77 135 -
?ea4 Factor 0.980 0.941 0.829 0 889
LIN V W
i Oul I� Total
� 1219 fi31 1850
49 d20 162
Right Thru Left
� ►
_m
m�o �
�
� �w � � � w0
� �'� North `��' � �
cn "�' �
o —
S _0D rn � �
,~D—� �t ► 10/31i2QC6 4 30 00 PM � �� d��
� ~ 10I3V2006 5 15:00 PM � a oo =
s ��
� �m n`_a� pRIMARY m - ��
I �� � `O mo°^�
I m—
� ►
Lefi Thru R�ght
b6 558 9
504 533 7137
Out ;n Total
UNO AVE SW
\!�
TRAFFICOUNT, INC.
P.O. BOX 2508
RF"'T^N, WASHINGTON OLYMPIA, WASHINGTON 98507 File Name : JTE30402P
s� H s w (360) 491-8116 Site Code : 00000002
Start Date 10/31!2006
LOC# 02 JTE06303M Page No 1
Groups Printed-PRIMARY
LIND AVE SW SW 16TH ST UND AVE S'JV SW 16TH ST
From North From East From Souih From West
StartTime RigM Thru Left Truck Ap�� RigM Thrv leR 7ruck Ap�� RigM T�ru . Left Truck Ap�� Rigl�t. Thru Left Truck A�'D� Exclu. tnClu. Int.
Total Totaf : TOWI Total Total Total Total
FaRor 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 lA
04 OOPM 15 103 33 14 151 70 12 1 3 83 1 130 10 7 141 22 32 83 3 137 27 512 539
04:ISPM 6 73 32 6 111 88 14 0 5 102 A 113 6 5 123 17 17 73 4 107 20 4d3 463
04:30PM 14 102 40 10 156 100 23 1 5 124 2 141 13 6 156 23 35 77 3 135 24 571 595
04 45FM 8 107 46 8 I61 97 15 4 6 116 3 109 8 1 120 20 27 63 7 110 22 507 529
Total 43 385 151 38 579 ' 355 64 6 19 425 10 493 37 19 540 82 111 296 17 489 �� 93 2033 2126
05:00 PM 13 105 41 9 159 101 21 2 2 127 2 171 18 4 191 ]7 43 69 3 129 18 606 624
OS:iSPM 14 106 35 10 155 97 12 2 3 111 2 137 27 8 166 . 15 34 57 1 106 22 538 560
05:30PM 8 8' 37 5 132 90 14 2 5 106 1 134 12 1 147 13 28 45 1 86 12 4i1 483
05:45PM 13 59 50 5 122 99 13 2 3 114 2 116 5 6 123 7 20 32 2 59 16 418 434
Tota� AS 357 lb3 29 568 387 0'3 8 13 458 7 558 62 19 627 52 125 203 ' 380 68 2033 2101
GrandTotal 91 742 314 67 1147 iJ2 127 14 32 883 17 1051 99 36 1167 134 236 499 24 869 161 4066 4227
Apprc�90 7.9 64.1 27.4 84.0 14.4 1.6 - 1.5 90.1 8.5 15A 27.2 57.4
Totai% 2.2 18.2 i.7 28.2 182 3.1 0.3 21.7 ' 0.4 25.8 2A 28.7 3.3 5.8 12.3 21.4 3 9 96 2
LWD AVE SW SW 16TH ST LIND AVE SW SW 16TH ST
From North From East From South From West
S1arlTime RIgM Thru left App.Total RigM T�ru Lefl App.Total Right Thru Left App.Total RIgM T�ru : Left App.Total Int.Tccai
PeaN Hour From 04:00 PM to 05:45 PM�Peak 1 of 1
Intersectfon 04:30 PM
Volume 49 420 162 631 395 74 9 478 9 558 66 633 75 139 266 d80 2222
Peicerrt 7.8 66 6 25.7 82 6 15 5 1.9 1.4 88.2 10.4 15.6 29.0 55.4
OS:OOVolume 13 SOS 41 159 101 24 2 127 2 171 18 191 17 43 69 129 606
Peak Factor
091i
High Irrt. 04:35 PM O5 00 PM 05:00 PM 04:30 PM
Volume 8 107 Qfi 161 101 24 2 127 2 171 18 191 23 35 77 135
ak Fac[or 0.980 0.941 0.829 C 899
aeak Hour From 04:OD PM ta 05:45 PM-PeaN 1 of 1
By ApproaCh 04:30 PM 04:30 PM 04:30 PM 04 OD PM
Voiume 49 420 162 631 395 74 9 478 9 558 66 fi33 82 111 296 d89
Percent 7.8 66 6 257 82.6 15.5 1.9 1 4 88.2 iQ4 16 B 22% 605
Hig�Irri. 04:45 PM 05:00 PM 05:00�M 04:00 PM
Volume S 107 46 161 101 2G 2 127 2 171 18 191 22 32 83 137
P=ak Faclor C,980 19a1 0 829 D fi92
4;,'
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12: 09:43
Existing (GWLAEX)
SIGNAL2000/TEAPAC[Ver 2 .02 . 12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0. 76 Vehicle Delay 47 . 0 Level of Service D
-------------------------------------------------------------------------
Sq 65 � Phase 1 � Phase 2 � Phase 3 � Phase 4 ( Phase 5 � Phase 6 �
**�** -------------------------------------------------------
------------------
I * I I + + i I ^ I " i
- I * 1 I + + � � ++++� ++++�
/ I \ I *> I I<+ + I I <++++� <++++�
I I I I v � ^ ++++� **** � �
I I I ^ I ^ I **** v I v 1 I
North � <+ � <* + +>� + *>� +>� +>� ****> I
I i + � * + + � + * � + � + � **** �
� + ( * + + � + * � + � + � v �
-------------------------------------------------------------------------
� G/C=0 .091 � G/C=-.005 � G/C=0 .211 � G/C=0. 129 � G/C=- . 022 � G/C=0. 396 �
� G= 11 . 0" I G= -0. 6" � G= 25.3" � G= 15.5" � G= -2 . 6" � G= 47 .5" I
� Y+R= 4 . 0" ( Y+R= 4. 0" � Y+R= 4 .0" � Y+R= 4 . 0" � Y+R= 4. 0" � Y+R= 4 .0" �
� OFF= 0 . 0$ � OFF=12 .5� � OFF=15.3� � OFF=39. 7$ � OFF=56.0$ � OFF=57 . 1� �
-------------------------------------------------------------------------
C=120 sec G= 96. 0 sec = 80 . 0� Y=24 . 0 sec = 20. 0� Ped= 0.0 sec = 0 .0�
------------------------------------------------------------------------------
� Lane �Width/ � g/C � Service Rate� Adj � � HCM � L � Queue ,
� Group � Lanes � Reqd Used � @C (vph) @E �Volumei v/c � Delay � S IModel 1 �
-------------------------------------------------------------------------------
N Approach 59. 4 E+
-----------------------------------------------------------------------------
-------------------------------------------------------------------------------
�RT+TH � 24/2 � 0 .275 10.211 � 1 � 735 � 327 � 0 . 444 � 41. 6 � D+� 231 ft�
� LT � 12/1 �0.272 � 0.091 ( 1 � 133 � 147 � 0 . 907 � 98 . 9 ( *F � 272 ft�
-------------------------------------------------------------------------------
S Approach 48.4 D
------------------------------------------------------------------------------
------------------------------------------------------------------------------
� RT � 12/1 � 0 . 446 10 . 413 I 494 � 654 � 562 � 0. 859 � 43.2 � *D+� 787 ft�
( TH ( 24/2 � 0. 306 � 0 .239 � 28 � 847 � 572 � 0 . 675 � 43. 6 � D+� 419 ftl
� LT � 12/1 �0.281 � 0 . 120 � 1 � 183 � 182 � 0 .858 � 79.7 � *E � 313 ft�
-------------------------------------------------------------------------------
E Approach 38. 3 D+
�RT+TH � 24/2 �0.345 � 0.407 � 1159 I 1433 � 814 � 0 . 568 � 28 . 0 � C � 488 ft�
� LT � 12/1 �0.290 � 0.140 � 1 � 220 � 216 �0. 871 � 77 . 3 � *E ( 367 ft�
-------------------------------------------------------------------------------
W Approach 47 . 9 D
�RT+TA � 24/2 (0.426 � 0.396 � 1093 � 1389 � 1242 � 0. 897 � 42. 1 � *D+) 942 ft
� LT � 12/1 �0.287 � 0.129 � 1 � 199 � 203 � 0. 890 � 83. 6 � *F � 354 ft
-------------------------------------------------------------------------------
G
�
Lind Ave. Business Park 11/15/06 I
SW Grady Way/Lind Ave. SW 12:09: 48 �
xisting (GWLAEX) '
SIGNAL2000/TEAPAC[Ver 2 .02.12] - Summary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 0 NETWORX West 0 0 0 0 0 0 0 Def No
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0.0 0 .0 0 .0 0 .0
PEDLEVELS 0 0 0 0
B I KEVOL[JME S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLUMES 20 20 20 20
BUSVOLCIMES 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0.00 0 .00 0.00 0.00
Movement Parameters
MOVLABELS RT TH LT RT TH LT RT TIi LT RT TH LT
VOLLJMES 29 281 140 31 742 205 534 543 173 97 1083 193
`iIDTHS 0 . 0 24 . 0 12. 0 0 .0 24. 0 12 . 0 12 . 0 24 . 0 12 .0 0 . 0 24 . 0 12 .0
.ANE S 0 2 1 0 2 1 1 2 1 0 2 1
vROUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0 . 00 0 .00 0.00 0 . 00 0 .00 0. 00 0 . 00 0 .00 0 .00 0. 00 0.00 0. 00
TRUCKPERCENTS 2.0 2.0 2. 0 2. 0 2. 0 2.0 2 . 0 2 .0 2.0 2. 0 2 . 0 ' 2 .0
PEAKHOURFACTORS 0. 95 0. 95 0. 95 0. 95 0. 95 0 . 95 0. 95 0 . 95 0 . 95 0. 95 0. 95 0. 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4.0 4.0 4.0 4. 0 4.0 4 .0 4 .0 9.0 4 .0 4 . 0 4. 0 4 .0
MINIM[7MS 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5. 0 5. 0 5.0
STARTUPLOST 2.0 2.0 2.0 2. 0 2.0 2. 0 2 .0 2.0 2 . 0 2 .0 2.0 2 .0
ENDGAZN 2.0 2.0 2.0 2. 0 2.0 2. 0 2 .0 2.0 2 .0 2.0 2. 0 2 .0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1 .00 1.00 1 .00 1.00 1 .00 1 .00 1 . 00 1 . 00 1 .00 1. 00 1. 00 1. 00
DELAYFACTORS 1 . 00 1.00 1.00 1 .00 1 .00 1.00 1 . 00 1 .00 1 .00 1 . 00 1 . 00 1. 00
NSTOPFACTORS 1.00 1 .00 1 .00 1.00 1 .00 1.00 1 . 00 1 .00 1 .00 1 .00 1. 00 1.00
SATURATIONFLOWS 0 3489 1770 0 3518 1770 1583 3539 1770 0 3996 1770
Phasing Parameters
SEQUENCES 65 ALL
PERMISSIVES No No No No LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0 .00 1
CYCLES 120 120 30 PEDTIME 0.0 0
GREENTIMES 10. 96 -0. 61 25.33 15.46 -2. 64 47 .51
YELLOwTIMES 4.00 4. 00 4 . 00 4.00 4.00 4 .00
;RITICALS 3 9 7 12 6 11
�`
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12 : 10:21
Without Project (GWLAWO)
SIGNAL2000/TEAPAC[Ver 2 .02 . 12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0 . 84 Vehicle Delay 57 . 9 Level of Service E+
-------------------------------------------------------------------------
Sq 65 I Phase 1 � Phase 2 � Phase 3 � Phase 4 ( Phase 5 � Phase 6 �
**�** -------------------------------------------------------------------------
I * I I + + I I " I " I
• I * I I + + � � ++++� ++++�
/ I \ I *> I I<+ + � � <++++ � <++++�
I I I I v I ^ ++++I **** I I
I I I ^ I ^ I **** � I � I I
North � <+ � <* + +>� + *>� +>� +>� ****> I
i I + � * + + � + * � + � + � **** �
� + � * + + � + * I + I + I � I
-------------------------------------------------------------------------
� G/C=0 . 091 � G/C=-.005 � G/C=0 .211 � G/C=0.129 � G/C=- .022 � G/C=0 . 396 I
� G= 11. 0" I G= -0 . 6" � G= 25. 3" � G= 15. 5" � G= -2. 6" � G= 47 . 5" (
� Y+R= 4.0" � Y+R= 4.0" I Y+R= 4 .0" � Y+R= 4. 0" � Y+R= 4.0" � Y+R= 4 . 0" �
� OFF= 0 . 0� � OFF=12.5� � OFF=15.3$ � OFF=39.7$ � OFF=56. 0� � OFF=57 . 1$ �
-------------------------------------------------------------------------
C=120 sec G= 96.0 sec = 80. 0� Y=24 . 0 sec = 20 . 0� Ped= 0 . 0 sec = 0. 0$
II -------------------------------------------------J----------------------------
� Lane (Width/ � g/C � Service Rate) Ad� � � HCM � L � Queue ,
� Group � Lanes � Reqd Used � @C (vph) @E �Volumel v/c � Delay � S �Model 1 �
-------------------------------------------------------------------------------
N Approach 68. 6 E
-------------------------------------------------------------------------------
----------------------------------------------------------------------------
�RT+TH � 24/2 J0 .279 � 0.211 � 1 � 736 � 358 �0 . 486 � 42 .1 � D+� 256 ft�
� LT � 12/1 � 0.277 � 0.091 ( 1 � 133 I 163 � 1 . 006 I 126. 9 ( *F � 332 ftl
-------------------------------------------------------------------------------
S Approach 58 .1 E+
� RT � 12/1 � 0.474 �0 .413 � 494 � 654 � 621 � 0. 950 I 57 .5 I *E+� 967 ft�
� TH � 24/2 � 0.315 I0.239 � 28 � 847 � 632 � 0. 746 � 45 . 9 � D � 477 ft)
� LT I 12/1 � 0.286 (0 .120 � 1 � 183 � 200 � 0. 943 � 98. 4 � *F � 369 ft�
-------------------------------------------------------------------------------
E Approach 43.2 D+
-----------------------------------------------------------------------------
�RT+TH � 24/2 � 0.359 � 0.407 � 1158 I 1432 � 900 �0. 628 � 29.2 � C � 556 ft�
� LT I 12/1 ( 0.296 � 0. 140 � 1 � 220 � 237 � 0 . 956 � 96. 1 � *F � 434 ft�
-------------------------------------------------------------------------------
W Approach 64 . 9 E+
-------------------------------------------------------------------------------
------------------------------------------------------------------------------
�RT+TH � 24/2 � 0. 452 � 0. 396 � 1093 � 1384 � 1369 � 0. 989 � 57 .5 � *E+� 1171 ft
I LT � 12/1 � 0.293 10. 129 � 1 � 199 � 226 � 0 . 991 � 109.2 � *F � 434 ft
-------------------------------------------------------------------------------
��
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12: 10:26
lithout Project (GWLAWO)
SIGNAL2000/TEAPAC [Ver 2.02 . 12] - Summary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 60 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 0 NETWORK West 0 0 0 0 0 0 0 Def No
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0 . 0 0 . 0 0. 0 0 .0
PEDLEVELS 0 0 0 0
B I KEVOLUME S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLUMES 20 20 20 20
BUSVOLL7MES 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0. 00 0 . 00 0. 00 0 . 00
Movement Parameters
' MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLUMES 30 310 155 35 820 225 590 600 190 105 1195 215
� 'TIDTHS 0 . 0 24. 0 12. 0 0 .0 24 . 0 12. 0 12 . 0 24 . 0 12. 0 0 .0 24 .0 12 .0
' .ANE S 0 2 1 0 2 1 1 2 1 0 2 1
.�ROUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0 .00 0 .00 0 .00 0 .00 0.00 0. 00 0 . 00 0. 00 0 .00 0.00 0.00 0. 00
TRUCRPERCENTS 2.0 2 . 0 2 . 0 2 . 0 2.0 2 . 0 2.0 2 .0 2 . 0 2 .0 2 . 0 2 .0
PEAKHOURFACTORS 0. 95 0 . 95 0 . 95 0 . 95 0. 95 0 . 95 0 . 95 0. 95 0 . 95 0. 95 0. 95 0. 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4 .0 4 .0 4 .0 4 . 0 4 .0 4 . 0 4.0 4. 0 4.0 4 . 0 4.0 4 .0
MINIMUMS 5. 0 5. 0 5.0 5 . 0 5.0 5.0 5.0 5. 0 5.0 5 . 0 5.0 5.0
STARTUPLOST 2. 0 2. 0 2. 0 2 . 0 2.0 2. 0 2.0 2.0 2. 0 2 . 0 2.0 2 .0
ENDGAIN 2 .0 2 . 0 2 . 0 2 . 0 2 .0 2 . 0 2.0 2 . 0 2. 0 2 . 0 2.0 2 .0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUELTE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1 .00 1 . 00 1 .00 1 . 00 1.00 1 . 00 1 . 00 1 . 00 1 . 00 1.00 1. 00 1 .00
DELAYFACTORS 1.00 1 . 00 1 .00 1.00 1. 00 1 .00 1.00 1. 00 1 . 00 1. 00 1. 00 1.00
NSTOPFACTORS 1 .00 1 . 00 1 .00 1 . 00 1 .00 1 . 00 1.00 1. 00 1 .00 1 .00 1.00 1 . 00
SATURATIONFLOWS 0 3492 1770 0 3517 1770 1583 3539 1770 0 3496 1770
Phasing Parameters
SEQUENCES 65 ALL
PERMISSIVES No No No No LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0 .00 1
CYCLES 120 120 30 PEDTZME 0. 0 0
GREENTIMES 10 . 96 -0 . 61 25.33 15.46 -2 . 64 47 . 51
YELLOWTIMES 9.00 4 . 00 4 .00 4 .00 4 .00 4.00
:RITICALS 3 9 7 12 6 11
�''
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12: 10: 48
With Project (GWLAWP)
SIGIJAL2000/TEAPAC[Ver 2 . 02. 12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0. 85 Vehicle Delay 59. 9 Level of Service E+
-------------------------------------------------------------------------
Sq 65 � Phase 1 � Phase 2 � Phase 3 � Phase 4 � Phase 5 � Phase 6 �
**�** ----------------------------------------------------------
---------------
I * I I + + I I " I ^ I
• I * I I + + � � ++++� ++++ �
/ I \ I *> I I<+ + � � <++++ � <++++�
I I I I v � ^ ++++� **** � �
I I i ^ I ^ I **** v I v 1 I
North � <+ � <* + +>� + *>� +>� +>I ****> I
I I + � * + + � + * � + � + � **** �
� + � * + + � + * � + � + � v �
-------------------------------------------------------------------------
� G/C=0.091 I G/C=- .005 � G/C=0 .211 � G/C=0 . 129 � G/C=-. 022 � G/C=0.396 �
� G= 11 .0" I G= -0. 6" ► G= 25.3" I G= 15.5" � G= -2 . 6" � G= 47 . 5" I
( Y+R= 4 . 0" � Y+R= 4.0" � Y+R= 4 .0" � Y+R= 4 .0" � Y+R= 4 . 0" � Y+R= 4 . 0" I
� OFF= 0 . 0� I OFF=12.5� � OFF=15.3� � OFF=39.7$ � OFF=56. 0$ � OFF=57 .1� �
-------------------------------------------------------------------------
C=120 sec G= 96. 0 sec = 80 .0� Y=24 .0 sec = 20 . 0� Ped= 0 . 0 sec = 0 . 0�
-------------------------------------------------------------------------------
� Lane �Width/ � g/C � Service Rate� Adj ( � HCM ( L � Queue �
� Group � Lanes� Reqd Used � @C (vph) @E �Volume) v/c � Delay � S �Model 1 �
-------------------------------------------------------------------------------
N Approach 68 . 4 E
�RT+TH I 24/2 � 0.280 � 0.211 � 1 � 736 I 364 (0 . 494 ( 42 .2 � D+� 260 ft�
� LT � 12/1 � 0.277 � 0.091 � 1 � 133 � 163 �1 . 006 � 126. 9 � *F � 332 ft�
-------------------------------------------------------------------------------
S Approach 63.3 E+
� RT I 12/1 � 0.485 10.413 J 494 � 659 � 643 �0 . 983 I 65. 7 I *E+� 1050 ft�
� TH � 24/2 �0.318 10.239 � 28 � 847 � 654 10.772 � 47 . 0 � D � 500 fti
( LT ( 12/1 �0.288 �0 . 120 � 1 � 183 f 207 � 0 . 976 � 107 .5 � *F � 395 ft�
-------------------------------------------------------------------------------
E Approach 44 _3 D+
�RT+TH � 24/2 10 . 359 ( 0 . 407 � 1158 � 1432 � 900 � 0. 628 � 29.2 � C � 556 ft�
� LT � 12/1 � 0 .297 � 0 . 140 I 1 � 220 � 241 � 0 . 972 � 100 .5 � *F � 448 ft�
-------------------------------------------------------------------------------
W Approach 65.2 E+
�RT+TH � 24/2 � 0. 452 � 0.396 I 1093 I 1384 � 1371 �0. 991 � 57 . 9 � *E+� 1175 ft�
� LT � 12/1 � 0.293 10. 129 � 1 � 199 � 226 � 0. 991 � 109.2 1 *F � 434 ft�
-------------------------------------------------------------------------------
� '/�
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12 :10: 53
� ith Project (GWLAWP)
SIGNAL2000/TEAPAC[Ver 2 . 02 . 12J - Summary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
�i Priorities 0 0 0 0 0 0 NETWORK West 0 0 0 0 0 0 0 Def No
� NODELOCATION 0 0
� Approach Parameters
APPLABELS N E S W
�'� GRADES 0.0 0 .0 0 .0 0 . 0
PEDLEVELS 0 0 0 0
B I KEVOLUME S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLiJME S 2 0 2 0 2 0 2 0
BUSVOLUMES 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0 . 00 0 . 00 0 . 00 0 . 00
Movement Parameters
' MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLUMES 30 315 155 35 820 229 611 621 197 107 1195 215
'iIDTH,S 0. 0 24.0 12.0 0 .0 24 .0 12. 0 12 . 0 24.0 12 . 0 0 .0 24 .0 12 . 0
�ANE S 0 2 1 0 2 1 1 2 1 0 2 1
.�ROUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0 . 00 0.00 0.00 0 .00 0 .00 0 . 00 0. 00 0. 00 0 .00 0 . 00 0.00 0. 00
TRUCKPERCENTS 2 . 0 2. 0 2 .0 2.0 2.0 2 .0 2.0 2.0 2.0 2 .0 2 . 0 2 .0
PEAKHOURFACTORS 0 . 95 0 . 95 0. 95 0. 95 0. 95 0. 95 0. 95 0. 95 0. 95 0 . 95 0. 95 0 . 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4.0 4 .0 4. 0 4. 0 4 .0 4 . 0 4 .0 4 .0 4 .0 4.0 4 .0 4.0
MINIMLTMS 5. 0 5_0 5.0 5.0 5.0 5 . 0 5.0 5.0 5 .0 5.0 5.0 5.0
STARTUPLOST 2 . 0 2.0 2 .0 2. 0 2.0 2 . 0 2.0 2. 0 2 .0 2.0 2.0 2 .0
ENDGAIN 2 . 0 2.0 2.0 2 .0 2 .0 2 . 0 2.0 2.0 2 .0 2 .0 2 .0 2 .0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1 . 00 1.00 1.00 1 .00 1 .00 1 . 00 1 . 00 1 . 00 1 . 00 1 .00 1. 00 1. 00
DELAYFACTORS 1 . 00 1.00 1.00 1 .00 1 . 00 1 . 00 1 . 00 1. 00 1 .00 1.00 1. 00 1.00
NSTOPFACTORS 1 . 00 1. 00 1.00 1 .00 1 . 00 1. 00 1 . 00 1 . 00 1 . 00 1 . 00 1.�0 1. 00
SATURATIONFLOWS 0 3493 1770 0 3517 1770 1583 3539 1770 0 3495 1770
Phasing Parameters
SEQUENCES 65 ALL
PERMISSIVES No No No No LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0 . 00 1
CYCLES 120 120 30 PEDTIME 0 .0 0
GREENTIMES 10 . 96 -0 . 61 25.33 15. 46 -2. 64 47 . 51
YELLOWTIMES 4 .00 4 .00 4 .00 4.00 4 .00 4 .00
;RITICALS 3 9 7 12 6 11
�
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12 : 11: ? �
With Project (GWLAWP)
SIGNAL2000/TEAPAC[Ver 2.02. 12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0.84 Vehicle Delay 55. 5 Level of Service E+
-------------------------------------------------------------------------
Sq 65 � Phase 1 � Phase 2 � Phase 3 � Phase 4 � Phase 5 � Phase 6 �
**�** -------------------------------------------------------------------------
I * I I + + I I " I ^ I
• I * I I + + � � ++++ � ++++ �
/ �\ � *> � �<+ + � � <++++ � <++++�
I I I I v � ^ ++++� **** I 1
I i I " I ^ I **** � I � I I
North � <+ +>� <* + *�� * *�) *�� *�� ****� *�I
( I + + I ,r + * � * * � * � * � **** * �
� + + � * + * � * * I * I * I v * I
-------------------------------------------------------------------------
( G/C=0 .113 I G/C=- . 006 � G/C=0 . 170 � G/C=0. 152 � G/C=-.023 � 6/C=0 .393 �
� G= 13. 6" � G= -0. 7" � G= 20. 4" � G= 18 .2" � G= -2 . 7" ( G= 47 .2" �
� Y+R= 4 .0" � Y+R= 4.0" � Y+R= 4. 0" � Y+R= 4 .0" � Y+R= 4.0" � Y+R= 4 . 0" �
� OFF= 0.0$ � OFF=14 . 7� � OFF=17.4$ � OFF=37 .8� � OFF=56. 3� � OFF=57 . 4$ �
-------------------------------------------------------------------------
C=120 sec G= 96. 0 sec = 80 . 0� Y=24 . 0 sec = 20.0$ Ped= 0 . 0 sec = 0.0�
------------------------------------------------------------------------------
� Lane �Width/ � g/C � Service Rate� Adj � ( HCM � L � Queue �
� Group � Lanes � Reqd Used � @C (vph) @E �Volume� v/c � Delay � S �Model 1 �
--------------------�-----------------------------------------------------------
N Approach 56. 1 E+
------------------------------------------------------------------------------
------------------------------------------------------------------------------
�RT+TH � 24/2 �0.280 � 0 .170 � 1 � 580 � 364 ►0 . 612 I 48. 0 I D ( 279 ft�
� LT � 12/1 � 0 .277 � 0. 113 � 1 � 171 � 163 � 0 . 815 ( 74 . 2 � *E � 274 ft�
-------------------------------------------------------------------------------
S Approach 67 . 8 E
� TH � 24/2 �0.318 � 0.198 � 1 � 696 � 654 � 0. 933 � 66. 8 � *E+� 581 ft�
� LT � 12/1 � 0 .288 � 0 . 141 � 1 � 221 � 207 � 0 . 831 � 70 . 8 � *E � 342 ft�
-------------------------------------------------------------------------------
E Approach 37 . 6 D+
�RT+TH � 24/2 (0.359 �0. 404 � 1140 I 1420 � 900 � 0 . 634 I 29. 6 � C � 559 ftl
� LT � 12/1 �0.297 � 0. 162 � 1 � 262 � 241 � 0 . 837 I 67 .7 � *E � 391 ft�
-------------------------------------------------------------------------------
W Approach 61 . 5 E+
�RT+TH I 24/2 � 0_ 452 � 0.393 � 1077 � 1374 � 1371 � 0 . 998 � 60. 1 � *E+� 1189 ft�
� LT � 12/1 � 0. 293 10. 152 � 1 J 242 � 226 � 0 . 840 � 70 . 0 � *E � 371 ft�
-------------------------------------------------------------------------------
(��'
Lind Ave. Business Park 11/15/06
SW Grady Way/Lind Ave. SW 12 : 11 :20
With Project (GWLAWP)
SIGNAL2000/TEAPAC[Ver 2.02.12] - Suaunary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 0 NETWORK West 0 0 0 0 0 0 0 Def No
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0.0 0 . 0 0 .0 0 . 0
PEDLEVELS 0 0 0 0
B I KEVOLUI�S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLiJI�S 2 0 2 0 2 0 2 0
BUSVOLLJME S 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0 .00 0 . 00 0.00 0 .00
Movement Parameters
MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLUMES 30 315 155 35 820 229 611 621 197 107 1195 215
T�TIDTHS 0 .0 24 .0 12 . 0 0 . 0 24 . 0 12 . 0 12 .0 24 .0 12 .0 0. 0 24 .0 12 .0
LANE S 0 2 1 0 2 1 1 2 1 0 2 1
3ROUPTYPES Norm Norm Norm Norm Norm Norm Fflo Norm Norm Norm Norm Norm
UTILIZATIONS 0 .00 0. 00 0.00 0 . 00 0 . 00 0.00 0 . 00 0 .00 0.00 0. 00 0. 00 fl .00
TRUCKPERCENTS 2.0 2. 0 2. 0 2 . 0 2. 0 2 .0 2. 0 2. 0 2.0 2. 0 2 . 0 2.0
PEAKHOURFACTORS 0 . 95 0. 95 0. 95 0 . 95 0 . 95 0 . 95 0 . 95 0 . 95 0 . 95 0 . 95 0. 95 0 . 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4 .0 4 .0 4. 0 4 .0 4 . 0 4.0 4 .0 4 .0 4 . 0 4 .0 4.0 4 .0 '�
MZNIMUMS 5 .0 5.0 5. 0 5.0 5.0 5.0 5. 0 5. 0 5. 0 5. 0 5.0 5.0 '
STARTUPLOST 2 .0 2 .0 2. 0 2 .0 2 . 0 2 .0 2 .0 2.0 2. 0 2. 0 2 .0 2.0
ENDGAIN 2.0 2 . 0 2.0 2 .0 2. 0 2 . 0 2.0 2. 0 2. 0 2. 0 2 . 0 2_0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFZOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1. 00 1 .00 1 .00 1 . 00 1 .00 1. 00 1 . Q0 1.00 1 . 00 1.00 1 .00 1.00
DELAYFACTORS 1 .00 1 .00 1 .00 1 .00 1 .00 1. 00 1 . 00 1 .00 1.00 1 .00 1 .00 1.00
NSTOPFACTORS 1 .00 1 . 00 1.00 1 .00 1 .00 1 .00 1 . 00 1 . 00 1. 00 1 . 00 1 .00 1 .00
SATURATIONFLOWS 0 3493 1770 0 3517 1770 0 3539 1770 0 3995 1770
Phasing Parameters
SEQUENCES 65 ALL
PERMISSIVES No No No No LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0. 00 1
CYCLES 120 120 30 PEDTIME 0.0 0
GREENTIMES 13. 59 -0. 68 20.43 18 .21 -2 . 71 47 .16
YELLOWTIMES 4 . 00 4.00 4 . 00 4 .00 4 . 00 4 . 00
"RITICALS 3 9 8 12 6 11
���
Lind Ave. Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12 : 03 : 11
Existing (16LAEX}
SIGNAL2000/TEAPAC[Ver 2. 02 . 12� - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0 . 38 Vehicle Delay 22.4 Level of Service C+
-------------------------
Sq 11 � Phase 1 � Phase 2 �
**�** -------------------------
I + + * I ^ t
. � + + * � ++++�
/ I \ �<+ + *> � <++++�
� � v � ^ ++++�
1 I ^ � **** v I
North � <+ + +>�++++> �
i I + + + �++++ �
� + + + � v �
-------------------------
� G/C=0. 443 I G/C=0. 491 �
I G= 53. 1" � G= 58 . 9" �
� Y+R= 4 .0" � Y+R= 4 . 0" �
� OFF= 0.0$ � OFF=47 . 6$ �
-------------------------
C=120 sec G=112 . 0 sec = 93.3$ Y= 8 .0 sec = 6. 7� Ped= 0 .0 sec = 0. 0�
------------------------------------------------------------------------------
� Lane �Width/ � g/C � Service Rate� Adj � � HCM � L � Queue ,
I Group � Lanes � Reqd Used � @C (vph) @E �Volume� v/c ( Delay � S �Model 1 �
-------------------------------------------------------------------------------
N Approach 23. 7 C+
------------------
�RT+TH � 24/2 � 0 .296 � 0.443 � 1320 ( 1542 ( 494 � 0. 320 � 21 .8 � C+ � 256 ft�
� LT � 12/1 � 0. 404 � 0 . 443 � 202 � 279 � 171 � 0. 600 ( 28. 9 ( *C � 212 ft�
-------------------------------------------------------------------------------
S Approach 22. 4 C+
------------------------------
�RT+TH � 24/2 � 0 .309 � 0 . 443 ( 1340 � 1563 � 596 � 0. 381 � 22 . 6 � C+� 316 ftl
� LT � 12/1 � 0.281 � 0 . 443 � 243 � 333 � 69 � 0.206 � 20 .8 � C+� 68 ft�
-------------------------------------------------------------------------------
E Approach 18 . 6 B
— -----------------------
�RT+TH J 24/2 � 0.305 � 0. 491 � 1357 � 1517 � 494 � 0. 326 � 18 . 6 � B � 241 ftl
� LT � 12/1 �0.240 � 0.491 � 453 � 556 � 9 � 0 . 016 � 15. 7 � B � 7 ft�
-------------------------------------------------------------------------------
W Approach 24 . 6 C+
-----------------------------------
�RT+TH � 24/2 {0 .264 10. 491 � 1480 � 1645 � 225 � 0 . 137 � 16.7 � B � 101 f t{
I LT � 12/1 � 0 . 471 � 0 . 491 � 300 � 385 � 280 � 0. 727 � 31 . 0 � *C � 358 ft
------------------------------------------------------------------------------
��;�'
Lind Ave . Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12 : 03: 15
Existing (16LAEX)
SIGNAL2000/TEAPAC [Ver 2 . 02 . 12] - Summary of Parameter Values
Zntersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 0 NETWORK West 0 0 0 0 0 0 0 Def No
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0 . 0 0.0 0.0 0 . 0
PEDLEVELS 0 0 0 0
B I KEVOLtJME S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLI1t�S 2 0 2 0 2 0 2 0
BUSVOLUMES 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0.00 0.00 0 . 00 0. 00
Movement Parameters
MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLLJMES 49 420 162 395 74 9 9 558 66 75 139 266
WIDTHS 0. 0 24 .0 12 . 0 0.0 24.0 12 .0 0.0 24. 0 12. 0 0.0 24 .0 12 .0
LANES 0 2 1 0 2 1 0 2 1 0 2 1
�ROUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0. 00 0. 00 0 .00 0 . 00 0 .00 0.00 0 .00 0 . 00 0 . 00 0.00 0.00 0. 00
TRUCKPERCENTS 2.0 2 .0 2.0 2. 0 2 .0 2 .0 2 . 0 2.0 2. 0 2 . 0 2 . 0 2. 0
PEAKHOURFACTORS 0. 95 0. 95 0. 95 0. 95 0 . 95 0. 95 0 . 95 0. 95 0. 95 0 . 95 Q. 95 0 . 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES . 4.0 4. 0 4.0 4 .0 4 . 0 4 .0 4.0 4.0 4 . 0 4 .0 4. 0 4 .0
MINIMUMS 5.0 5.0 5.0 5.0 5.0 5.0 5. 0 5.0 5. 0 5.0 5. 0 5.0
STARTUPLOST 2 .0 2.0 2.0 2.0 2 .0 2.0 2.0 2.0 2. 0 2 .0 2 .0 2.0
ENDGAIN 2.0 2. 0 2.0 2 .0 2 .0 2 .0 2 .0 2.0 2 . 0 2.0 2 . 0 2. 0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1 . 00 1 . 00 1 . 00 1 .00 1 .00 1.00 1 .00 1.00 1 . 00 1 . 00 1 .00 1 . 00
DELAYFACTORS 1. 00 1 . 00 1. 00 1 .00 1 .00 1 .00 1 . 00 1 .00 1 .00 1 . 00 1 .00 1 .00
NSTOPFACTORS 1.00 1 . 00 1 .00 1 . 00 1.00 1.00 1 .00 1 .00 1 .00 1 . 00 1 .00 1 . 00
SATURATIONFLOWS 0 3483 644 0 3092 1133 0 3531 758 0 3353 769
Phasing Paraateters I,
SEQLTENCES 11 ALL
PERMISSIVES No Yes No Yes LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0 . 00 1
CYCLES 120 120 30 PEDTIME 0 .0 0
GREENTIMES 53. 11 58.89
YELLOWTIMES 4 . 00 4.00
�RITICALS 3 12
�+
�
Lind Ave. Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12: 02 :20
Without Project (16LAW0)
SIGNAL2000/TEAPACjVer 2 . 02 . 12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0. 44 Vehicle Delay 25. 3 Level of Service C+
-------------------------
Sq 11 I Phase 1 � Phase 2 �
**�** -------------------------
i + + * I " I
. � + + * � ++++�
/ � \ �<+ + *> � <++++�
I I v � ^ ++++�
I I ^ � **** v I
North � <+ + +>�++++> �
l I + + + �++++ �
� + + + � v �
-------------------------
� G/C=0.443 � G/C=0 . 491 �
) G= 53.1" � G= 58 . 9" �
� Y+R= 4 .0" � Y+R= 4 . 0" �
� OFF= 0.0� � OFF=47 . 6� I
-------------------------
C=120 sec G=112 .0 sec = 93. 3� Y= 8.0 sec = 6. 7� Ped= 0. 0 sec = 0 . 0�
----�--------------------------------------------------------------------------•
� Lane �Width/ ) g/C I Service Rate� Adj � � HCM � L � Queue i
� Group I Lanes � Reqd Used I@C (vph) @E �Volume� v/c � Delay � S �Model 1 �
-------------------------------------------------------------------------------
N Approach 26. 3 C+
�RT+TH � 24/2 �0 .303 10 . 443 � 1320 � 1542 � 547 �0 . 355 I 22 . 3 � C+ � 287 ft�
� LT � 12/1 �0 . 457 � 0 . 443 � 180 I 250 � 1B9 � 0. 735 I 38 . 1 � *D+ � 262 ft�
-------------------------------------------------------------------------------
S Approach 22. 9 C+
�RT+TH � 24/2 � 0.319 {0.443 � 1340 � 1563 ( 658 � 0 .421 � 23.1 � C+� 355 ft�
� LT � 12/1 { 0 . 294 � 0 . 443 � 221 � 304 � 79 10 .256 � 21 .5 I C+� 80 ftl
-------------------------------------------------------------------------------
E Approach 19.0 B
-----------------------------------------------------------------------------
----------------------------------------------------------------------------
�RT+TH � 24/2 � 0 . 314 � 0 . 491 � 1357 I 1517 � 542 � 0 . 357 � 19. 0 � B � 268 ft�
� LT � 12/1 �0 .241 � 0 . 491 � 436 � 537 � 11 �0 . 020 � 15.7 � B � 9 ft�
-------------------------------------------------------------------------------
W Approach 33 .2 C
�RT+TH � 24/2 �0.267 10 .491 � 1480 � 1645 � 252 � 0 . 153 I 16. 9 � B � 114 ft�
� LT � 12/1 �0 .529 � 0 .491 � 278 � 359 � 311 � 0 . 866 � 46.5 � *D � 465 ft�
-------------------------------------------------------------------------------
�L"
Lind Ave. Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12 :02:24
�lithout Project (16LAW0)
SIGNAI,2000/TEAPAC [Ver 2 . 02 .12] - Summary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 � NETWORK West 0 0 0 0 0 0 0 Def No
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0. 0 0 .0 0. 0 0 .0
PEDLEVELS 0 0 0 0
B I KEVOLIJME S 0 0 0 0
PARKINGSIDES None None None None
PARKVOLUMES 20 20 20 20
BUSVOLUME S 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0.00 0 .00 0 .00 0.00
Movement Parameters
MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLUMES 55 465 180 435 80 10 10 615 75 85 155 295
WIDTHS 0 .0 24 . 0 12 .0 0 . 0 29 .0 12 .0 0.0 24. 0 12.0 0.0 24 . 0 12 .0
�NE S 0 2 1 0 2 1 0 2 1 0 2 1
__tOUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0.00 0 . 00 0.00 0 . 00 0 _00 0.00 0. 00 0 .00 0 . 00 0. 00 0. 00 0. 00
TRUCKPERCENTS 2 .0 2 .0 2 . 0 2.0 2 .0 2. 0 2.0 2. 0 2.0 2 . 0 2 .0 2 .0
PEAKHOURFACTORS 0 . 95 0 . 95 0_ 95 0 . 95 0 . 95 0. 95 0 . 95 0 .95 0 . 95 0. 95 0. 95 0 . 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4.0 4 . 0 4 . 0 4 .0 4 .0 4.0 4 .0 4 . 0 4 . 0 4 .0 4 .0 4 .0
MINIMLTMS 5.0 5.0 5.0 5.0 5 . 0 5. 0 5.0 5. 0 5.0 5 . 0 5.0 5.0
STARTUPLOST 2.0 2 .0 2 .0 2.0 2 . 0 2. 0 2 .0 2.0 2 .0 2 .0 2.0 2 .0
ENDGAIN 2.0 2.0 2.0 2.0 2 .0 2. 0 2 .0 2.0 2 . 0 2 .0 2 .0 2 .0
STORP,GE 0 0 0 0 0 0 0 0 0 0 0 0
INITIALQUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1 .00 1 .00 1. 00 1 . 00 1 .00 1 .00 1 .00 1 .00 1.00 1.00 1.00 1. 00
DELAYFACTORS 1 . 00 1 .00 1 .00 1 . 00 1 .00 1.00 1 .00 1 .00 1 .00 1 . 00 1.00 1.00
NSTOPFACTORS 1 .00 1.00 1. 00 1 . 00 1 .00 1.00 1.00 1 .00 1 . 00 1 .00 1.00 1 . 00
SATURATIONFLOWS 0 3483 580 0 3091 1093 0 3530 697 0 3352 731
Phasing Parameters I',
SEQUENCES 11 ALL
PERMISSZVES No Yes No Yes LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0. 00 1
CYCLES 120 120 30 PEDTIME 0.0 0
GREENTIMES 53. 11 58.89
YELLOWTIMES 4. 00 4. 00
^.RITICALS 3 12
l�
Lind Ave. Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12 : 01 : 16
With Project (16LAWP)
SIGNAL2000/TEAPAC[Ver 2 .02.12] - Capacity Analysis Summary
Intersection Averages for Int # 1 -
Degree of Saturation (v/c) 0.45 Vehicle Delay 26. 0 Level of Service C+
-------------------------
Sq 11 � Phase 1 � Phase 2 �
**�** -------------------------
I + + * I " I
. � + + * � ++++�
/ � \ �<+ + *> � <++++�
I I v � ^ ++++�
I I ^ � **** v I
North � <+ + +>�++++> �
� � + + + �++++ �
� + + + � v �
-------------------------
I G/C=0 . 443 ( G/C=0. 491 �
� G= 53.1" � G= 58 . 9" �
� Y+R= 4 .0" � Y+R= 4 .0" �
� OFF= 0 . 0$ � OFF=47 . 6$ �
-------------------------
C=120 sec G=112.0 sec = 93. 3� Y= 8.0 sec = 6. 7$ Ped= 0 .0 sec = 0 . 0�
------------------------------------------------------------------------------
� Lane �Width/ � g/C � Service Rate� Adj � � HCM � L � Queue ,
� Group � Lanes � Reqd Used � @C (vph) @E (Volume� v/c � Delay � S �Model 1 �
-------------------------------------------------------------------------------
N Approach 28 . 6 C
----------------------------------------------------------------------------
-----------------------------------------------------------------------------
�RT+TH ( 24/2 �0.305 � 0 .443 � 1320 � 1542 � 559 � 0 .363 � 22 .3 � C+� 295 ftl
( LT � 12/1 �0. 486 � 0.443 I 162 � 226 � 189 � 0 . 804 � 47 . 1 � *D � 283 ft�
-------------------------------------------------------------------------------
S Approach 23. 4 C+
�RT+TH � 24/2 � 0 .327 � 0.443 � 1340 � 1563 ► 710 � 0 . 454 � 23. 5 � C+� 388 ft�
� LT � 12/1 � 0.300 � 0.443 � 217 � 298 � 86 � 0 . 284 � 21 . 8 I C+� 89 ftl
-------------------------------------------------------------------------------
E Approach 19.0 B
�RT+TH � 24/2 �0.314 � 0 . 491 � 1357 � 1517 ( 542 �0 .357 � 19.0 � B � 268 ft�
� LT � 12/1 � 0 .241 � 0 . 491 � 433 � 534 ( 11 �0 .021 � 15.7 � B � 9 ft�
-------------------------------------------------------------------------------
W Approach 33.2 C
�RT+TH � 24/2 10 .268 � 0. 491 � 1478 � 1643 � 255 � 0 . 155 � 16. 9 � B � 115 ft�
i LT � 12/1 � 0 . 529 ( 0 .491 � 278 I 359 � 311 � 0 . 866 � 46. 5 I *D � 465 ft
------------------------------------------------------------------------------�
�'�- ;
�
Lind Ave. Business Park 11/15/06
SW 16th St. /Lind Ave. SW 12: 01 :24
aith Project (16LAWP)
SIGNAL2000/TEAPAC[Ver 2 .02 .12] - Summary of Parameter Values
Intersection Parameters for Int # 1 -
METROAREA NonCBD NETWORK North 0 0 0 0 0 0 0 Def No
LOS Targets 35 80 5 NETWORK East 0 0 0 0 0 0 0 Def No
90 100 5 NETWORK South 0 0 0 0 0 0 0 Def No
Priorities 0 0 0 0 0 0 NETWORK West 0 0 0 0 0 0 0 Def No II
NODELOCATION 0 0
Approach Parameters
APPLABELS N E S W
GRADES 0 .0 0 . 0 0. 0 0 . 0
PEDLEVELS 0 0 0 0
BIKEVOLUMES 0 0 0 0
PARKINGSIDES None None None None
PARKVOLLTME S 2 0 2 0 2 0 2 0
BUSVOLUME S 0 0 0 0
RIGHTTURNONREDS 0 0 0 0
UPSTREAMVC 0.00 0 . 00 0 .00 0. 00
Movement Parameters
MOVLABELS RT TH LT RT TH LT RT TH LT RT TH LT
VOLUMES 55 476 180 435 SO 10 10 664 82 87 155 295
WIDTHS 0 .0 24 .0 12.0 0 . 0 24_0 12. 0 0.0 24. 0 12. 0 0 . 0 24 . 0 12.0
.ANES 0 2 1 0 2 1 0 2 1 0 2 1
:ROUPTYPES Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm Norm
UTILIZATIONS 0 . 00 0. 00 0 .00 0. 00 0 .00 0 . 00 0. 00 0.00 0 .00 0. 00 0. 00 0.00
TRUCKPERCENTS 2 . 0 2.0 2.0 2 . 0 2 .0 2 .0 2 .0 2.0 2. 0 2 .0 2 .0 2. 0
PEAKHOURFACTORS 0. 95 0 . 95 0 . 95 0. 95 0 . 95 0 . 95 0 . 95 0 . 95 0. 95 0 . 95 0. 95 0. 95
ARRIVALTYPES 3 3 3 3 3 3 3 3 3 3 3 3
ACTUATIONS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
REQCLEARANCES 4.0 4 . 0 4 . 0 4 .0 4 .0 4. 0 4 .0 4.0 9 .0 4 .0 4 . 0 4 .0
MINIMLIMS 5. 0 5. 0 5. 0 5.0 5 .0 5. 0 5.0 5.0 5.0 5. 0 5. 0 5.0
STARTUPLOST 2.0 2 . 0 2 .0 2 . 0 2 .0 2 . 0 2 .0 2.0 2 . 0 2 .0 2. 0 2.0
ENDGAIN 2.0 2.0 2 .0 2 . 0 2.0 2 . 0 2 . 0 2.0 2 . 0 2 .0 2. 0 2.0
STORAGE 0 0 0 0 0 0 0 0 0 0 0 0
INITIAI.QUEUE 0 0 0 0 0 0 0 0 0 0 0 0
IDEALSATFLOWS 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
FACTORS 1.00 1 . 00 1 .00 1 .00 1 .00 1 .00 1. 00 1.00 1 .00 1 . 00 1 . 00 1 .00
DELAYFACTORS 1 .00 1 .00 1 . 00 1 .00 1 . 00 1 .00 1 .00 1. 00 1 .00 1 .00 1 .00 1.00
NSTOPFACTORS 1. 00 1 .00 1 .00 1.00 1 . 00 1 .00 1 . 00 1 .00 1 .00 1.00 1.00 1.00
SATURATIONFLOWS 0 3484 530 0 3091 1089 0 3531 683 0 3348 731
Phasing Parameters
SEQUENCES 11 ALL
PERMISSIVES No Yes No Yes LEADLAGS None None
OVERLAPS Yes Yes Yes Yes OFFSET 0 . 00 1
CYCLES 120 120 30 PEDTIME 0.0 0
GREENTIMES 53. 11 58. 89
YELLOWTIMES 4 .00 4. 00
�RITICALS 3 12
l�
i wo-w ay �top Lontrol Page 1 of 2
TWO-WAY STOP CONTROL SUMMARY
eneral Information Site Information
nalyst Chris Valdez Intersection Lind/SA
gency/Co. JTE, INC urisdiction Renton
Date Performed 1�/13/2006 nalysis Year wrth project
nal sis Time Period m eak
Pro ect Descri tion Lind Ave Business Park (SALAWP
East/West Street: Site Access North/South Street: Lind Ave. SW
Intersection Orientation: North-South Stud Period hrs : 0 25
ehicle Volumes and Ad'ustments
Ma'or Street Northbound Southbound
Movement 1 2 3 4 5 6
L T R L T R
olume 0 685 11 13 545 0
Peak-Hour Factor, PHF 0.95 0 95 0.95 0 95 0.95 0.95
Hourly Flow Rate, HFR 0 721 11 13 573 0
Percent Heavy Vehicles 0 -- — 0 -- --
Median Type Undrvided
RT Channelized 0 0
Lanes 0 2 0 0 2 0
Configuration T TR LT T
U stream Si nal D 0
Minor Street Westbound Eastbound
Movement 7 8 9 10 11 12
L T R L T R
olume 45 0 56 0 0 0
Peak-Hour Factor. PHF 0.95 0.95 0.95 0.95 0.95 0.95
Hourl Flow Rate. HFR 47 0 58 0 0 0
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (%) 0 �
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 0 1 0 0 0 0
Configuration LTR
Dela Queue Len th and Level of Service
pproach NB SB Westbound Eastbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration LT LTR
(vph) 13 105
(m} (vph) 882 352
Ic 0.01 0.30
5% queue length 0.04 1.23
Control Delay 9.1 19.5
LOS A C
pproach Delay -- -- �9.5
pproach LOS -- — C
>
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f�%
file://C:1Documents and Settings`,.O��nerlLocal Settings\Temp1u2k443_tmp 11!22!2006
Two-VVay Stop Control PaQe 1 of 2
TWO-WAY STOP CONTROL SUMMARY
General Information Site information '�I
nalyst Chris Valdez intersection Llnd/SA
gency/Co JTE, INC Jurisdiction Renton
Date Performed 11/13/2006 nalysis Year with project I
nal sis Time Period m eak �
Pro ect Descri tion ��
EasWVest Street: Sife Access NorthlSouth Street: Lind Ave SW
intersection Orientation: North-South Stud Period hrs : 0.25
ehicle Volumes and Ad'ustments
Ma�or Street Northbound Southbound
Movement 1 2 3 4 5 6
L T R L T R
olume 0 685 91 13 545 0
Peak-Hour Factor. PHF 0 95 0.95 0.95 0.95 0.95 0.95
Hourly Fiow Rate, HFR 0 721 11 13 573 0
Percent Heavy Vehicles 0 -- — 0 -- --
Median Type Two Way Left Turn Lane
RT Channelized 0 0
Lanes 0 1 0 1 1 0
Configuration TR L T
U stream Si nal 0 0
Minor Street Westbound Eastbound
Movement 7 8 9 10 11 12
L T R � T R
olume 45 0 56 0 0 0
Peak-Hour Factor PHF 0.95 0 95 0.95 0.95 0.95 0.95
Hourly Flow Rate. HFR 47 0 58 0 0 0
Percent Heavy Vehicies 0 0 0 0 0 0
Percent Grade (%) 0 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 0 9 0 0 D 0
Configuration LTR
Dela , Queue Len th, and Level of Service
pproach NB SB Westbound Eastbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration L LTR
{vph) 13 905
C (m) (vph) 882 404
Ic 0.01 0.26
95% queue length 0.04 1.03
ontrol Delay 9.1 17.D
LOS A C
pproach Delay -- -- 17.0
pproach LOS -- -- C
>
Cop�right�;2000 Umversin�of i'lorida,All Rfehts Reserved Version 4.1c
Z�
tile://C:1Documents and SettingslHP_O�ti-ner'�.Loc�l Seitings'�.Temp'�,u�k1E91.tmp 11;'?4�2006
Page 1 of 2
Mark Jacobs
From: "Mark Jacobs" <jaketraffic@comcast.net>
To: "Kayren Kittrick" <Kkittrick@ci.renton.wa.us>
Sent: Tuesday, November 14, 2006 9:36 AM
Subject: Re: Fw: lind avenue business park
Kavren
Any accident issues that you are aware of at the study I!S's you identified �'�
or on Lind Avenue SW? �--v.^�-
Also my Engineer's review of the City's ���eb site showed the Cit}-'s 2005 to
?O10 TIP that might be dated. A copy of the current six year TIP would be
nice.
One TIP project in particular is #45 Lind A��e. SW l bth to 43rd. Does this
project widen Lind Avenue to provide a TV�'LTL? Or is the Cit�� considering
re-striping the 4-lanes to 3 (my look at the traffic data indicates a 3-lane
street as viable)
Contact me if you have any questions.
Mark
----- Original Message -----
From: "Kayren Kittrick" <hkittrick;�r;:ci.r�nt����,��a.u�
TO: <�<t�.�llTlt�lt� u`CUt1lCASt,t1�t>
Sent: Wednesday, October 25, 2006 12:43 P��1
Subject: Re: F���: lind avenue business park
FIi N1ark,
The f rst one did get to me, but I had an extraordinarily busy day. And
this one has been the same.
In looking it over, I am only concerned on the effect the proposed project
would have on Lind and the SW 16th to Grad�� �'ay intersections. h�Iostly this
will need traffic generation and probable traffic turning movement and
routes. Will there be one or two driveways required for fire and general
access?
If the intent is to leave 23rd and 21 st in the same condition (no
development of frontages) remembex that current code requires defending why
not, rather dian why the city needs it. So have the information regarding
wetlands. lack of traffic, or any other justification ready when it is time
to ask for a modification or even to ask for fee-in-lieu of improvements.
Sorry this took so long.
Zf
1?/11/2006
Page 2 of 2
Kayren Kittrick
Development Engineering Supervisor
Public Works Inspections & Permits
425-430-7299
»> "Mark Jacobs" <.jak�traf�tic;�i;c;��mcc�t�[.n�t> l Or'25:'2006 ]:l� PM »>
Kavren
Sending again in case first e-mail did not get to you.
��1ark
----- Original Message -----
From: "Mark Jacobs" <ja�:�t��al�ti�;�i;c�fnca�t.i��i>
To: "Kavren Kittrick" <I�kittrick,'�7:ci.r-enton.��a.us>
. _ _ _ _..__ _ _ _._
Sent: Tuesday, Uctober 24, 2006 1:44 PN1
Subject: lind avenue business park
> Kayren
>
> Attached is information on an warehouse (�60°�o)ioffice (�40%)park (the
> plan
> is still in flux) project.
>
> Please review the attached and let me know what the CoR will require in
> the �
> TIA?
>
> Contact me if you have any questions.
>
> Mark
> 206.762.1978
>
2Z
12,�t �!2006
S1'AT� OF WASHiNG'PUN � U�YAk'1'MEN'I' UF 'tN1aNSFOkTATItIN
T R I P S S Y S T E M
ANNLJAL TRAFF7C REPORT
AVERAGE UAILY TRAFFIC VVLUME
STAT'E
. . ._-------------------
RUUTE FUNCT TRUCK PERCENTAGES 2002 2003 2004 "L005
STATE ROUTE MILEPOST LOCATION COUPLET CLASS SNGL DAL TR7PLE TOTAL UNITS UNITS UNITS UNITS
167 006.52B BEFQRE JCT N LEVEF. Rf� 1 34000� 34000* 34000
167 *� 005.26 AFTER JCT SR 167 COUPLET C 1 21000 21000 20000k 20000
167 005.73 BEFORE RAMP SR 512 1 41000* 42000
167 005.98 AT SR 512 1 29000 3000U Z8000* 28000
167 006.44 AFTER RAMP SR 512 1 93000 96000 97000* 98000
167 007.0� AT SR 410 BRIDGE 1 55000� 56UOU
167 007.49 AF'TER RAMP SR 410 1 79000• BOOOU
167 011.84 BEFORE RAMP ELLINGSON RD 1 92000"
167 012.26 AT ELLINGSON kD BRIDGE 1 820U0"
167 012.80 AFTER RAMP ELLINGSON RD 1 91000"
167 014,94 AFTER RAMP SR 18 WB 1 1U5000 106000 110000 114000'
167 015.77 AT 15TH ST NA 1 89000 90000 93000 980U0'
167 016.20 AFTGR RP.MP 15TH ST NW 1 1080D0 115000* 115UOU 11600D'
(�J 167 017.93 AT S 277TH ST 1 970D0 103000* 103000 104000'
\l� 167 018.29 APTER RIaMP S 277TH ST 1 1130D0 118000� 120U00 122000*
\..�
. 167 019.60 I�T SR 516 BRIDGE 1 870U0 93000* 96000 97000+
1t;7 019.93 AF'PtiR RAMP SR 516 1 990D0 105000* 109000 109000"
157 021.31 AT 84TH AVE SE BRIDGE 1 83000 92000* 94000 95000"
167 021.78 AFTER RAMP N CENTRAL AVE 1 1090D0 ll2000* ll6000 119000'
167 022.40 AT S 212 ST 1 92000 96000k 98000 99000`
1G7 023.70 AT ADC LOCATION P6 1 111000* 113000* 117000* 1190U0`
167 024,77 AFTER RAMP SW 43RD ST 1 117000 119000� 120000 122000" ":�
167 027.16 BGFORE JCT SR 900 WYG CONN 1 36000* 38000
167 027.18 AF'TEA JCT SR 900 WYE CONN 1 37000" 37000
167 027.27 BEFORE JCT SR 900 COUPLF.T WYF, CONN 1 380U0'
STAT'E ROUTE NO 167 COUPLET PUYAliP MILWAUKEE AVE TO SR 1G7
167COPUYALP ** UU5.72 MILWAUKLE /1VG; 131't1DGl.'BLG FOI7'I'I�; 1 210D0 71000 21099* 21400
'" COUPI,F.T SKETi'H TN RA('K C7F BOOK � t RASED ON ACTUAL COTJrJT
, gpTiRCE OF TRU�'K F'ERCENTAGES
F"'^^ 47
.Adopted 1 i/01/04
Table 7-1
2005 - 2010 Six-Year TIP�
Total Project Costs
�
I
�
Total Pro'ect Costs (
- ' P:-evioua - ' Six•Y�ar �7o:al i ,
'.t:`� Pro-ou TitNi I Gosts 2Mi5 2006 2007 200! 2009 2070 PuloC Tobl Cost �
SV�alOvorb Pr iam ;,GSO,C01 405.00G� a�5,000, iCS.W01 �C5,000 �OS.00G1 �05090 [A30,OOC` �dBC J��
7 �SR167JSW27t�5tl5tnnEerBr 355.17a !C.00C 10.00q tO,;AC� �C,090�~ �-0000 5.000 55.OJ0 +t0.t�i
StranAsrBv,'SWY1thStConnott. 7'05350 BOCCCO! I 5.39�,5:0� Zd,W0.00J: 26500.000 BS,89�,SJ0 5E,s00,000
� SR 169 MOV•1101h ro SR900 2000�92 10AD0�� 55+PJ� �.680,CC0 2.759 C00 6,095,tp0 8 GSS.c92
5 IR�ntonUfban5nuK1� RUSNI 20,�89 SOOG S.COJ' S.tl00� S,OOC 5,000 5000 3000C 5C.159
c :7nont�ro ram 32.58a 2C?[c 20,=G0' 20.<OGi 2C<yJ; ?OAC.] 20.�00 t22 400 15<.9dd '
• �RalnierAvCorrfdor5luClkn rov. 2b7)70 27,CC01 20.000 2G,OOOi 251.A0� 296:,000; 3.t65.UiG 5a50,000 0.'1')10 i
a NE JrerNE 4th CorclOor J23.892 3�5.3C7� BC7.500 � S,Ot'OC�C ZJ00,000' :1b0,GCC 1G,339.8C0 10663,662
s walkwa vro ram 31'S33 ?36 6JJl 250,000! 25Q 000'� 250.00C 30AOG 250 OOC ?a86.57C '..BCo.�33
+c 'S LaM Wash.RosCwa I rov. '..SCO.00O ; 1.95CA00 Se.3C0.W0 ?J 800.OJ0 39�SG G}7 c•,a50.000 II
�i 'SR'169CortiAorSt 50.GCCi � SC.000 SOGLq
+Z Sout�R�nton Pro�tt 156,800 �S.<"GC� 2�0,6�0. 258,2Gi: <15,pp0 i
�7 I�OS Im rov�aH In Renlon I 72.186 30.�J'J� 2C.000 t0,000i 60.90C 1C2,18fi
•.< Vro��ctOevslo menWnA�s� n 2'7,3b3 "SOJ9; 175.000� 200.000� 200,OOD� 200.000 200,000 t 150000 t 421,J63 i
•5 '�NE�In 5UH uiam.nv NE 55,100 3a490C � 344,500 400,000 i
�a Rainiar Av•SW 9th(o IIA PI 8Q009 SHS,CCC I 2,150.000 855 OW�; �I 3 590,CW .i 570,DOG
n B�nwn Rd.S 23t�to M�In Z0.000 d59 a00 2.500 I 19/.9,'�0 <P1 9pp
�e .pnen��Clrtulatbn Pro am !95.308 �C0,6:A� ?00 ppp �7G,CGG 20G.000 ?SG.GOD 25G 000 +,3CC C09 t,J95 70B �
++ 'Brin •ins �<Uon6R� Ir 12Ca'1 aGGGGi 1�0000 ap.ppC 615,000� aGWU' 30000 305,LP? 1,�25,a•�1
aa Loo R� hc•ment Pro ram 57,1a� 20.00G' 20,000 20 J�' M.000 2C.000 27,0;0 120�9CG 17;.ia1
1' S' n R� 4ument Pro nm 1312: �.SOC� 7.500 .'S00; 7.SOp ).SCti 7300 45.?JC SE.a2)
n 'PON Gro nm 47.97G ?S;.n'h�� �BAOOf 25.000 25.000 25.000� 25000 '73.IJ0 i21]7s
]� SounE TnnsR MOV Dlract Acc�sc I a8.523 �.O,COJ S.OGO 15.G00 6t 523
i� tnMc 5af� Pro nm 233 79' BC�W 40.000 �0,�7J! 40.000 �O.00D a0.00C '<BO.00b 5�3.7yt
75 Tr�TcETGrnc Pro om 25D,505 25'�9CC� 1'�.400� i5,0.YJ' SOOOG ?0000 30,J00 9?1.370 �9'..d05
7e CBD Bike b PeA.Conntetbns 25.Y12 50,DOG SO,COO 70000 590,OOC it0,00J 5,000 �,175,000 '�,+40,2?:
n ln�rialRehab,Pro . 537.BC9 195.OJC' 240.00V 205.CCC 3d�.CCd� 230.!�J' ;80.000 1,390,OfA 1,92'.800
1� '�uvallAvsHE 66;781 '.252,'Oi. !,692,000 � 2,950.'00 3.6'518:
» �Sur,s�o'Owa111nNn�ctlon 1tSD9J 3E'.CLCi ' ?81000 s96,r,70
�o RR Crozsin SM� Pro . 5.798 S,OCC' S.QCO iG,000 10.000 3C.P90 35.'96
): TDM Pr ram 7C06`0 c:.20.. 6e 2C0� 6a2C{�� 6i,200� Ba 2UJ� W.200 3852G0 c85.8'G
ax TnnaConeurronc �784 a0.000i 10.000 4G.00L�1 10.00Oi �OC�O! 30.000 '{O.QCO tet784
a� ,Mitsin Llnkzoro nm 36.350 7C,C�. ?OWO 30,�JCC' 30,000 30,OOG 30.00C 780,OOC 21Q350
s� GI3 N�ses As�essrmnt 14.8�a 35.000 35.00.�i ?O.OJOi 20.000 20,000 :C�A(YJ �6C OJJ t9t.87t
�5 Gnc w CortWor Sw0 S.WO 35.000� 120,OOG� gC GOG '3G OOJ t,B�C 000� ',020.000 J295.Oi."�0 3 7C0,000 , �
3e IBk�ue Rout�O�v.Pro nm 24,198 20000i 18;�00 79.GOC 710 OCO' � 8C.000 BC,C06 329,OM 350798
�? lake Wish.Bv-Pn1c to Coubn Gk 329 900 '5,500�• 7i9.'00 �29,50C iS8,50C
�a �.Innn �ne 9 rol Coord. 28.572 t2.OQ0' iZPYJ J8.572
39 Envlronm�nulMoNtorin IZ3,i11 SS.00C ?5000i 50000� 25,000 25.000� 25,000 zes.oa 508,717
�c �Tnne-Y�n� E Sooa G��M Cor�. 7,300 5 OCO' �-
__ 5 CCC 7 2 300
.+ WSDOTCoordinanonPr nm ' 18B57 1G000' i0,00Q tu,000 1�,000 70,CGbl 1000G 80:9LC '7,857
�: :%tor tM Arts 2G OCC 50 OW� 30 000 30,000' SO.00C 'A.00.^. 30.000 :20.0�0 2+O,C00
�� �.+teAal MOV Oro nm 125 35< 1:.,000 10 000 20,OP0 +�5 354
�a parkSu�a�tCortlCor I ',889 25,000� SO,OGO 399C00 �59"ACO.� 1.059,00� J,2;5,000 3.22i989 �
�5 Llra AvSW 16t�•SW{Jrd 5 0�0 5.000 5 D00 19i:.00C' 625 OC4 2,SSJ,OCO Z 555 000 ��-
�6 B�nson Rd 5!S 11at St �?B 500 67 500; 61.SOC 200 C00
.' 'Lo an av Concnu Panel R� air a60,000 �6C G00 460 0�'.A
u Cart;Mtu31 nal 5A00 t0.000! 20000� 3<O.ON <00.000.' SO.000 794.GCL 795000
�s 7nnail Prlorl SI nal S bm �280.315 30,000 i JD.D00 �..�10.375
so �,7nnfitCant�rViEw 2639t t0.000 1GJC0 30.397
6i MOus�� 5-Win fo BYfMtt 810.00Q� B+C,OOJ 91C.000
57 irans Vall� RS SO.OGO S.CCO S.000 10.0('iC 50.00J
f� Lak�Wai�.Br$li VIaM 629�00 1p.SOJ 10.600 RaJ.000
x Mon�l•r Road 8�1e � SG0.000 t2.000 � i 12 000 5;2 D00
� 55 �51':,-tn St.,11nA Ave DW _ 273�7� 26<23, 26,423 3'N.000
_ �i�v�i:hve N£ ;<:�g Cou�iy 5:,'�5d; .'�.Ef.n� . --"' :,72Z.'�« /�';;,^�00
_... , . .� .:'� �.
r- . -. _'"_.. � .." '. _._
_ �ota�5ou•ce5 54918.8761 966655• 9'1070G J36410' �596a'4� 5�6"" '8'6'tUO� �o421"Gi
� �, � .S l r`�f i S / /Y�c� ( � C�i'��` �-'fi
.
i.S 1' �} {� c i r- �, e �._-. � %�r,�'
/ `" cS' `. �..�
L
� �/
G
��
lIl-1-;
�
4. BMP Implementation
15 O� � O
Completed by:
BMP Implementation Title:
Date:
Develop a plan for impiementing each BMP. Describe the steps necessary to implement the BMP
(i.e., any construction or design),the schedule for completing those steps (list dates), and the
erson s res onsible for im lementation.
Scheduled Milestone and Person
BMPs Description of Action(s) Completion Date(s) Responsible for
Required for Action
Im lementation
Good 1.
Housekeeping
2.
3
Preventive 1.
Maintenance
2.
3.
4.
Spill 1.
Prevention
and 2.
Emergency
Cleanup
3.
Inspections 1.
2.
3.
2005 Surface 1Nater Design Manual (CSWPP Formsj 1r'1I2005
Page 1
Schedule Milestone Person
BMPs Description of Action(s)Required for and Completion Responsible
Im lementation Date s for Action
Source Control 1.
BMPs
2.
3
4.
5.
6.
7.
8.
Treatment 1.
BMPs
2.
3.
4.
Emerging 1.
technologies
2.
Flow Control 3.
BMPs
4.
2005 Surface Water Design Manual (CSWPP Forms) 1/1/2005
Page 2
5. MaterialInventory
16 OQ � O
Completed by:
Titie:
�� �;>.
Date: "
Material Invento �
List materials handled, treated, stored, or disposed of at the project site that may potentially be exposed to precipitation or runoff.
Quantity (Units) Likelihood of contact with stormwater Past Spill or
Used Produced Stored if Yes, describe reason Leak
Material ur ose/Location indicate erlwk. or r. Yes No
2005 Surface Water Design Manual (CSWPP Forms) Paye 1 1/U200.5
6. Potential Pollutant Source Identified
�� �� = 0 �
Compieted by:
Title:
Potential Pollutant Source Identification Date:
List all potential stormwater pollutants from materials handled,treated, or stored on-site.
Likelihood of pollutant being present in your
Potential Stormwater Pollutant Stormwater Pollutant Source stormwater discharge. If yes, explain
2005 Surface Water Design Manual (CSWPP Forms) Page 1
�
7. List of Significant Spills and Leaks
18 OQ � O
Completed by: ._
Title:
List of Significant Spills and Leaks Date:
List all spills and leaks of toxic or hazardous pollutants that were significant but are not lirnited to, release of oil or hazardous substances in excess of reportable
guantities. Although not required,we suggest you list spills and leaks of non-hazardous materials.
Description Response Procedure
Date Location Type of �uantity Source Reason for Amount of Material No Preventive Measure Taken
(as Material , If Spill/Leak Material longer
(month/daylyea indicated Known Recovered exposed to
r) on site Stormwater
map) (Yes/No)
2005 Surface Water Design Manual (CSWPP Forms) Page 1
8. Employee Training
19 QQ � O
Completed by:
Employee Training Title:
Date:
Describe the annual trainin of em lo ees on the SWPPP, addressin s ill res onse, ood housekee in , and material mana ement ractices.
Training Topics Brief Description of Training ProgramlMaterials Schedule for Training
(e.g.,film, newsletter course) (list dates) Attendees
1. LINE WORKERS
Spill Prevention and
Response
Good Housekeeping
Material Management
Practices
2. P2 TEAM:
SWPPP Implementation
Monitoring Procedures
2005 Surface Water Design Manual (CSWPP Forrris) Paqe 1 t/U2O05
9. Pollution Prevention Team
z o �Q � �
Completed by:
Pollution Prevention Team Title:
Date:
Responsible Official: Title:
Team Leader: Office Phone:
Ceil Phone #:
Pager #:
Responsibilities:
(1) Title:
Office Phone:
Pager#:
Cell Phone:
Responsibilities:
(2) Title:
Office Phone:
Pager#:
Celi Phone #:
Responsibilities:
2005 Surface Water Design Manual (CSWPP Formsl 1;24/2005
Page 1
i
• �
8.O ESC ANALYSIS AND DESIGN
See the enclosed Construction Stormwater Pollution Prevention Plan (CSWPPP) in the
following pages.
Z2 �� � a
Construction
Storm wa ter Po//ution
Prevention P/an
-,.. PREPARED FOR :
�. Tarragon, LLC
�-
` � o�� � - 1000 2�d Avenue, Suite 3200
`� �� Seattle WA 98104-1074
�. �
� .�.�� "�, x � �` � (206) 233-9600
s�r�, Contact: Murphy McCullough
PROJECT.•
°b'0N ��` � Cedar River Corporate Park
206200.10
I hereby state that this Construction PREPARED BY.•
Stormwater Pollution Prevention Plan
for Cedar River Corporate Park has been Charles ��Ted�� HI�� E.I.T.
prepared by me or under my �
supervision and meets the standard of Project Engineer
care and expertise that is usual and
customary in this community for
professional engineers. I understand Matt Budsberg
that the City of Renton does not and Project Engineer
will not assume liability for the
sufficiency, suitability, or performances
of drainage facilities prepared by me.
REVIEWED B Y.•
Connie Linden, P.E.
Project Manager
Paul 6. McCormick, P.E., S.E.
Principal
March 2007
TABLE OF CONTENTS
SECTION PAGE
1.0 Introd uction.................................................................................................... 1
2.0 Project Description...........................................................................................
2.1 Impacts to Endangered Species, Cultural Resources, Historical Buildings....... 2
3.0 Erosion Control Specialist.................................................................................. 3
4.0 Existing Site Conditions .................................................................................... 5
5.0 Critical Areas................................................................................................... 5
6.0 Soils .............................................................................................................. 5
7.0 Erosion Problem areas...................................................................................... 6
8.0 Construction Stormwater Pollution Prevention Elements ........................................ 6
8.1 Mark Clearing Limits...............................................................................
8.2 Establish Construction Access.................................................................. 6
8.3 Control Flow Rates................................................................................. 7
8.4 Install Sediment Controls........................................................................ 7
8.4.1 Stabilize Soils.............................................................................. 7
8.4.2 Structural BMPs........................................................................... 8
8.5 Protect Slopes....................................................................................... 8
8.6 Protect Drain Inlets................................................................................ 9
8.7 Stabilize Channels and Outlets................................................................. 9
8.8 Control Pollutants .................................................................................. 9
8.9 Control Dewatering ............................................................................... 12
8.10 Maintain BMPs......................................................................................
1
8.11 Manage the Project...............................................................................13
9.0 Employee Training .......................................................................................... 13
10.0 Construction Phasing.......................................................................................15
11.0 Construction Schedule.....................................................................................15
12.0 Financial/Ownership Responsibilities.................................................................. 16
13.0 Engineering Calculations..................................................................................16
14.0 Conclusion ..................................................................................................... 16
APPENDICES
AppendixA Vicinity Map
Appendix B Existing Conditions
Appendix C C-1 .... Proposed Preload Conditions
C-2 .... Developed Conditions
Appendix D Soils Information
Appendix E Geotechnical Engineering Studies
E-1 .... Prepared by Atlas Geotechnical Engineering, Inc., April 1985
E-2 .... Prepared by Terra Associates, Inc., November 16, 2006
E-3 .... Addendum by Terra Associates, Inc., February 22, 2007
Appendix F Wetland Analysis
Appendix G Engineering Calculations
Appendix H FEMA Flood Insurance Map
EXHIBITS
Exhibit 1 Inspection Logs
1.0 INTRODUCTION
In 1972, Congress passed the Federal Water Pollution Control Act (FWPCA), also known as
the Clean Water Act (CWA), to restore and maintain the quality of the nation's waterways.
The ultimate goal was to make sure that rivers and streams were fishable, swimmable,
and drinkable. In 1987, the Water Quality Act (WQA) added provisions to the CWA that
allowed the EPA to govern stormwater discharges from construction sites. In 1998, the
EPA published the final notice for General Permits for Stormwater Discharges from
Construction Activities Disturbing 5 Acres of Greater (63 Federal Register 7898, February
14, 1998). The general permit includes provisions for development of a Stormwater
Pollution Prevention Plan (SWPPP) to maximize the potential benefits of pollution
prevention and sediment and erosion control measures at construction sites.
Effective 1 July 2003, EPA signed the National Pollutant Discharge Elimination System
General Permit for Discharges from Large and Small Construction Activities. A
Construction Stormwater Pollution Prevention Plan (SWPPP) has been prepared for
this project in order to meet the intent of the permit.
The King County Stormwater Management Manual for, 2005 Edition, requires a SWPPP for
projects where the new, replaced, or new plus replaced impervious surfaces total
2,000 square feet or more. The proposed project will exceed this threshold; therefore, a
Construction SWPPP is required.
Development, implementation, and maintenance of the Construction SWPPP will provide �I
the selected General Contractor with the framework for reducing soil erosion and �I
minimizing pollutants in stormwater during construction of the Cedar River Corporate
Park.
The SWPPP will:
. Define the characteristics of the site and the type of construction that will be
occurring.
• Identify all potential sources of pollution that may reasonably be expected to affect
the quality of stormwater discharges from the construction site.
• Describe the practices that will be implemented to control erosion and the release of
pollutants in stormwater.
• Create an implementation schedule to ensure that the practices described in this
SWPPP are in fact implemented, and to evaluate the plan's effectiveness in reducing
erosion, sediment, and pollutant levels in stormwater discharged from the site.
• Describe the final stabilization/termination design to minimize erosion and prevent
stormwater impacts after construction is complete.
• Assure compliance with the terms and conditions of the permit.
This SWPPP includes the following:
• Identification of the SWPPP Coordinator with a description of this person's duties.
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• Identification of the stormwater pollution prevention team that will assist in
implementation of the SWPPP during construction.
• Description of the existing site conditions, including existing land use for the site,
soil types at the site, as well as the location of surface waters that are located on or
next to the site.
• Identification of drainage areas and potential stormwater contaminants.
• Description of stormwater management controls and various Best Management
Practices (BMPs) necessary to reduce erosion, sediment, and pollutants in
stormwater discharge.
• Description of the facility monitoring plan and how controls will be coordinated with
construction activities.
• Description of the implementation schedule and provisions for amendment of the
plan.
2.0 PROJECT DESCRIPTION
Tarragon LLC, proposes to construct four (4) office/ retail buildings on a site comprised of
approximately 12.5 acres zoned light industrial. The site is located between SW 215t
Street and SW 23rd Street off of Lind Avenue in the City of Renton, King County,
Washington. Of the 12.5 acres, approximately 11,77 acres will be developed and the
remaining 0.73 acre is to be undisturbed.
The proposed project consists of approximately 143,307 square feet of retail business
space in four separate buildings: Building A is 35,047 square feet and located on the west
portion of the property; Building B is 29,940 square feet and located on the south portion
of the property; Building C is 33,740 square feet and located on the north portion of the
property; and Building D is 44,580 square feet and located on the east portion of the
property. Other associated project facilities will include parking, truck loading areas,
landscaping areas, and utilities.
The site will initial�y be preloaded with soil to help achieve the final finish floor elevation
of 25.25. The proposed preload layout is illustrated in Appendix C-1 — Proposed Preload
Conditions.
In the developed conditions, all drainage will be collected and conveyed to a stormwater
pond via pipes. Treatment will be provided by bioswales downstream of detention. The
proposed layout is illustrated in Appendix C-2 — Developed Conditions.
Drainaqe — All storm drainage features are designed to meet all of the requirements of the
2005 King County Surface Water Design Manual with respect to detention and treatment
per the request of the City during pre-construction meetings.
2.1 Impacts to Endangered Species, Cultural Resources, Historical Buildings
To the best of our knowledge, this construction will have no impact on endangered
species, cultural resources, or historical buildings.
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3.0 EROSION CONTROL SPECIALIST
The Erosion Control Specialist for this project will be provided with final submittal who is
employed by Tarragon. Contact information will be provided with final submittal:
Name: Jeff Fogarty
Company: Tarragon, LLC
Address: 1000 2nd Avenue, Suite 3200
Seattle, WA 98104-1074
Phone: (206) 233-9600
Fax: (206) 233-0260
The duties of the Erosion Control Specialist include:
• Implement the SWPPP/TESC plan with the aid of the SWPP team.
• Oversee maintenance practices identified as BMPs in the SWPPP.
• Conduct or provide for inspection and monitoring activities in accordance with
NPDES General Permit for Storm Water Discharges from Construction Activities,
Part 3, Section 3.10 - Inspections, Section 3.11 - Maintaining an Updated Plan, and
Section 3.12 - Signature, Plan Review and Making Plans Available, as follows:
o Inspections shall occur at least once every 14 calendar days and within
24 hours of the end of a storm event of 0.5 inch ar greater.
o Inspection frequency may be reduced to at least once every month if: ,
■ The entire site is temporarily stabilized; ',
■ Runoff is unlikely due to winter conditions (e.g., the site is covered I',
with snow, ice, or the ground is frozen); or I,
■ Construction is occurring during seasonal arid periods in arid areas and �
semi-arid areas. I,
o A waiver of the inspection requirements is available until 1 month before I
thawing conditions are expected to result in a discharge, if all of the following
requirements are met:
■ The project is located in an area where frozen conditions are
anticipated to continue for extended peri�ds of time (i.e., more than
one month);
• Land disturbance activities have been suspended; and
■ The beginning and ending dates of the waiver period are documented
in the SWPPP.
o For each inspection required above, an inspection report must be completed.
At a minimum, the inspection report must include:
■ The inspection date;
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■ Names, titles, and qualifications of personnel making the inspection;
■ Weather information for the period since the last inspection (or since
commencement of construction activity if the first inspection), including
a best estimate of the beginning of each storm event, duration of each
storm event, approximate amount of rainfall for each storm event (in
inches), and whether any discharges occurred;
■ Weather information and a description of any discharges occurring at
the time of inspection;
• Location(s) of discharges of sediment or other pollutants from the site;
■ Location(s) of BMPs that need to be maintained;
• Location(s) of BMPs that failed to operate as designed or proved
inadequate for a particular location;
■ Location(s) where additional BMPs are needed that did not exist at the
time of inspection; and
■ Corrective action required, including any necessary changes to the
SWPPP, and implementation dates.
o A record of each inspection and of any actions taken in accordance with this
Section must be retained as part of the SWPPP for at least 3 years from the
date that permit coverage expires or is terminated.
o The SWPPP plan, including the site map, must be amended whenever there is
a change in design, construction, operation, or maintenance at the
construction site, which has or could have a significant effect on the discharge
of pollutants to the waters of the United States that has not been previously
addressed in the SWPPP.
o A copy of the SWPPP (including a copy of the permit), Notice of Intent (NOI),
and acknowledgement letter from EPA must be retained at the construction
site or other location easily accessible to EPA during normal working hours.
o A sign or other notice must be posted conspicuously near the main entrance of
the construction site. The sign or notice must contain the following
information:
■ A copy of the completed NOI, as submitted to the EPA Storm Water
Notice Processing Center; and
■ The current location of the SWPPP, and name and telephone number of
a contact person for scheduling SWPPP viewing times.
• Identify other potential pollutant sources and make sure they are added to the plan.
. Identify any deficiencies in the SWPPP and make sure they are corrected.
• Ensure that any changes in construction plans are addressed in the SWPPP.
4 �� � O
The General Contractor will ensure that all housekeeping and monitoring procedures are
implemented, while the ESC Specialist will ensure the integrity of the structural BMPs.
4.0 EXISTING SITE CONDITIONS
The subject site consists of an approximately 12.6-acre, roughly rectangular shaped site
located between SW 215t Street and SW 23�d Street off of Lind Avenue in the City of
Renton, King County, Washington (See Appendix A — Vicinity Map). The subject property
is bound to the north by a Category 2 wetland, which is within the SW 215` Street
right-of-way, to the south by a category 3 wetland, which is within the 23`d Street
right-of-way; to the east a commercial development, and to the west by Lind Avenue.
(See Appendix B — Existing Conditions).
The site consists of a relatively flat topography with an estimated maximum elevation
change of 3 to S feet. The northern half of the site has an approximate elevation change
of 3.5 feet across a horizontal distance of approximately 1,080 feet, flowing from the west
to the east. The southern half of the site has an approximate elevation change of 3 feet
across a horizontal distance of approximately 890 feet, flowing from the west to the east.
The greatest estimated maximum elevation change is 5 feet across a horizontal distance
of approximately 1,245 feet, flowing from the southwest corner to the northeast corner.
The subject site is vegetated primarily with sparse grass, patches of miscellaneous brush,
and localized small-diameter trees.
5.� CRITICAL AREAS �
There are two wetlands on our parcel; to the north by approximately 1,080 feet of
� Category Two (2) wetlands and SW 215t Street, to the south by approximately 889 feet of
Category Three (3) wetlands. Both lie on the property lines and both will be maintained
with their buffers. See Exhibit F.
According to FEMA Flood Insurance Rate Map Panel No. 53033C0978F, the project site
does lie within a 100-year flood plain. We have been told that the City of Renton has an
updated flood map that show our parcel no longer included in the 100yr flood zone (City of
Renton Flood Hazard Area Map, June 1998). Since the flood elevation is at 19.5 feet and our site
is at 20 feet +, the City's map has been explained as such that our site is no longer included
within a flood plain, but we have not officially seen the City's map.
6.0 SOILS
A geotechnical engineering survey was performed on November 16, Z006, by Terra
Associates, Inc., and an Addendum provided February 22, 2007 (see Appendix E). Their
investigation confirmed soil conditions, as indicated by Atlas Geotechnical performed in
April 1985 (see Appendix E). The upper-most layer being a brown, sandy gravely silt
including some rock fragments. The gravel is primarily angular material and the fill was
derived from stripping to expose rock in a rock quarry. The lower portion of the fill is
generally blue-gray in color and appears to be from the same source as the upper fill,
, except that the rock content and sizes are larger. The rock content increased in depth.
Total fill thickness varied from 6.5 to 10.5 feet, generally being thinnest near the southern
boundary and thickest toward the middle.
Light to heavy groundwater seepage was encountered at all twelve test pit locations
throughout the site. Seepage was encountered in the test pits at depths from 3.5 to
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8 feet below existing grade, generally being deeper at the northeastern portion of the
site. Based on observed conditions, the seepage encountered at the test pit locations was
likely indicative of seasonal groundwater moving through relatively permeable lenses of
sand and gravel and perched groundwater moving through relatively permeable lenses of
sand and gravel and perched groundwater collecting in the soils located above the
relatively low permeability silty sand interbeds. Based on the color changes and
conditions observed, ground water levels appear to be 2.5 to 6 feet below the surface.
The draft geotechnical engineering study prepared by Terra Associates, Inc. on
November 16, 2006, has been included in its entirety as Appendix E-Z. The draft
geotechnical engineering study and infiltration evaluation prepared by Atlas Geotechnical
Engineering, Inc. in April 1985 has been included in its entirety as Appendix E-1.
�� The site soils have been classified as Map Unit 104, Indianola Loamy Sand, and Map
Unit 149, Nisqually Loamy Sand according to the WA641 Soil Survey of Lewis County area,
i Washington, provided by the Natural Resource Conservation Service. Permeability of
I these soils is moderately rapid. Available water capacity is moderate. Runoff is very
slow, and the hazard of water erosion is slight. See Appendix D — Soils Information for
data provided by the Natural Conservation Service.
7.O EROSION PROBLEM AREAS
The proposed site will generally consist of slopes less than 5 percent. The use of
retaining walls to facilitate grade changes will not be necessary, but retaining walls will be
necessary for the detention pond. Steeper slopes, not to exceed 3 feet horizontal to
1 foot vertical, are present in the temporary sediment pond to the northeastern side of
the project site. All exposed slopes will be seeded and additional measures will take place
as discussed later in Section 8.5 — Protect Slopes.
8.O CONSTRUCTION STORMWATER POLLUTION PREVENTION ELEMENTS
The purpose of this section is to describe how each of the twelve Construction SWPP
elements (as defined by the Stormwater Management Manual for Western Washington,
February 2005, Washington State Department of Ecology [DOE]) have been addressed,
and to identify the type and location of BMPs used to satisfy the required element. If an
element is not applicable, a reason is provided. Since the DOE's BMP requirements are
mimicked by the King County manual, we have chosen to use the DOE's BMP numbering
system.
8.1 Mark Clearing Limits
Prior to beginning land disturbing activities, including clearing and grading, all clearing
limits will be marked with high visibility plastic or metal fence (BMP C103). Significant
vegetation to remain will be clearly marked and protected by fencing.
8.2 Establish Construction Access
Two construction entrances will be provided to access the existing project site off of
Lind Avenue. One construction entrance will be constructed on the northwest portion of
the site, and one on the southwest portion of the site. The construction entrances will be
removed when the site is stabilized.
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If sediment tracking onto the surrounding rights-of-�vay from construction vehicles leaving
the project site becomes an issue, provisions for wheel washing or tire baths shall be
implemented on the project site, Roads shall be thoroughly cleaned at the end of each
working day. Sediment shall be removed from roads by shoveling or pickup sweeping,
and shall be transported to a controlled sediment disposal area. Street washing shall be
allowed only after sediment is removed in this manner.
8.3 Control Flow Rates
Vegetation consists primarily of sparse grass, patches of miscellaneous brush, and
localized small-diameter trees. The site is being completely cleared for construction of the
project. To reduce the potential of sediment laden runoff from the site, flow control
devices shall be constructed as one of the first steps in grading. This includes, but may
not be limited to temporary interceptor ditches, rock check dams, and the temporary
sediment pond. The stormwater will travel through the temporary interceptor ditches and
discharge to the temporary sediment pond at the western portion of the project site. The
temporary sediment pond has been designed in accordance with the Washington State
Department of Ecology Stormwater Management Manual for Western Washington,
February 2005 Edition.
8.4 Install Sediment Controls
As part of the initial construction activities, BMPs will be installed to trap sediment on-site.
The identified BMPs include a temporary sediment pond, silt fencing, stabilized
construction entrances, dust control, interceptor ditches, rock check dams, plastic
covering, seeding, mulching, and catch basin inlet protection.
The permanent stormwater facilities will be developed during the erosion control
implementation phase. In addition, the site will be graded to drain to the proposed
stormwater conveyance system. The new conveyance system will be pumped to a
detention pond. The permanent stormwater facility has sufficient capacity to
accommodate a 100-year, Z4-hour storm event without an overflow situation.
8.4.1 Stabilize Soils
To prevent soil from the erosive forces of raindrops, flowing water, and tivind,
the following BMPs will be implemented:
• From October 1 through April 30, no soils shall remain exposed and
unworked for more than 2 days. From May 1 to September 30, no soils
shall remain exposed and unworked for more than 7 days. This condition
applies to all soils on the site, whether at final grade or not.
• In cool wet weather, topsoil stabilization measures are recommended to be
straw, excelsior mats, silt fences and hand seeded grass.
• Soils shall be stabilized at the end of a shift before a holiday or weekend, if
needed, based on the weather forecast.
• After fertilizing, all areas that will not be impacted by construction of the
paved areas will be seeded (BMP C120).
• Topsoil stockpiles will be stabilized with plastic coverings (BMP C123).
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• Dust control (BMP C140) will be provided by sprinkling the site with water.
• A lay down, staging, and storage area will be located on the project site.
• Permanent erosion control measures will include site paving, seeding of
exposed soils, and providing vegetation per the landscape plans.
8.4.2 Structural BMPs
In conjuncti�n with the soil stabilization BMPs mentioned in Section 8.4.1 -
Stabilize Soils, structural erosion control measures are to be implemented to
further protect soil from the erosive forces of raindrops and flowing water. The
following structural BMPs will be implemented:
• High Visibility Plastic or Metal Fence (BMP C103)
• Stabilized Construction Entrance (BMP C105)
• Construction Road/Parking Area Stabilization (BMP C107)
• Mulching (BMP C121)
• Plastic Covering (BMP C123)
• Dust Control (BMP C140)
• Interceptor Swales (BMP C200)
• Channel Lining (BMP C202)
• Rock Check Dams (BMP C207)
• Storm Drain Inlet Protection (BMP C220)
• Silt Fence (BMP C233)
• Temporary Sediment Pond (BMP C241)
8.5 Protect Slopes
Seeding (BMP C120) or plastic covering (BMP C1Z3) shall be utilized to protect exposed
soils and reduce hillside erosion by creating a natural or artificial cover. In addition,
mulch (BMP C121) shall be applied to all slopes over 3H:1V.
Upslope drainage and run-on waters shall be diverted with interceptors at the top of the
slope. Off-site stormwater shall be handled separately from stormwater generated on the
project site. Diversion of such off-site stormwater around the site is an allowable option,
provided that the diverted flow is redirected to the natural drainage location at or before
the property boundary.
Check dams shall be used within channels and temporary interceptor ditches that are cut
down a slope.
8 �� � O
Excavated material shall be placed on the uphill side of trenches, consistent with space
and safety c�nsiderations.
The following BMPs will be implemented:
• Temporary and Permanent Seeding (BMP C1Z0)
• Interceptor Swale (BMP C200)
• Check Dams (BMP C207)
• Plastic Covering (BMP C123)
� • Mulchin BMP C121
9 � )
8.6 Protect Drain Inlets
Storm drain inlet protection (BMP C220) shall be provided to all drainage collecting
structures as they are installed so that stormwater runoff does not enter the conveyance
system without first being filtered or treated to remove sediment.
Approach roads shall be kept clean. Sediment and street wash water shall not enter
storm drains without prior and adequate treatment.
Inlets shall be inspected weekly, at a minimum, and daily during storm events. Inlet
protection devices shall be cleaned or removed and replaced when sediment has filled
one-third of the available storage (unless a different standard is specified by the product
manufacturer). General rule of thumb is to clean inlets before 6 inches of sediment can
accumulate.
8.7 Stabilize Channels and Outlets
No temporary conveyance channels have been designed. We are proposing to sheet flow
to temporary ponds/ditches on the border of the site.
Outlets from temporary sediment pond(s) will be maintained and kept clean of sediment
and in working condition during construction. BMP C209 - Outlet Protection shall be
implemented.
8.8 Control Pollutants
All pollutants, including waste materials and demolition debris, that occur on-site during
construction shall be collected and stored in a securely closed metal dumpster. The
dumpster shall be emptied a minimum of once per week and the trash hauled to the local
landfitl. No construction materials will be buried on-site.
Cover, containment, and protection from vandalism shall be provided for all chemicals,
liquid products, petroleum products, and non-inert wastes present on the site. On-site
fueling tanks shall include secondary containment.
Maintenance and repair of heavy equipment and vehicles involving oil changes, hydraulic
system drain down, solvent and de-greasing cleaning operations, fuel tank drain down and ,
removal, and other activities that may result in discharge or spillage of pollutants to the �
9 ' � II
����
--- �
ground or into stormwater runoff must be conducted using spili prevention measures, such
as drip pans. Contaminated surfaces shall be cleaned immediately foilowing any discharge
or spill incident. Emergency repairs may be perf�rmed on-site using temporary tarps
placed beneath and, if raining, over the vehicle.
Application of agricultural chemicals, including fertilizers and pesticides, shall be
conducted in a manner and at application rates that will not result in the loss of chemical
due to stormwater runoff. Manufacturer's recommendations for application rates and
procedures shall be followed.
BMPs shall be used to prevent or treat contamination of stormwater runoff by pH
modifying sources. These sources include bulk cement, new concrete washing and curing
waters, waste streams generated from concrete grinding and sawing, and concrete
pumping and mixing without waters. BMP C151 - Concrete Handling and BMP C152 -
Sawcutting and Surfacing Pollution Prevention, shall be implemented.
All personnel will be instructed regarding the correct procedure for waste disposal. Good
housekeeping and spill control practices will be followed during construction to minimize
stormwater contamination from petroleum products, fertilizers, and concrete.
Table 8-1 below lists several pollutants that are commonly found on construction sites that
have the potential to contaminate storm runoff. These pollutants will be present mainly in
areas of building and pavement construction. The Contractor and SWPPP/TESC
Coordinator will be responsible for identifying areas where these pollutants are being
used, and will monitor runoff coming from these areas. All personnel shall be instructed
regarding the correct procedure for waste disposal and application of appropriate BMPs
should contamination occur, as defined in Section 9.0 - Employee Training.
If contaminated runoff is found in soils, or if a spill or discharge to the environment
occurs, the Erosion Control Specialist must immediately notify the City of Renton. A
determination must be made regarding the contamination level of the soil being removed
to determine the proper disposition. Upon receiving final direction from the City of
Renton, the Contractor shall remove the polluted water/soil and dispose of it off-site, as
directed.
10 ■ � II
���0 I
Table 8-1
Potential Construction Site Stormwater Pollutants
Chemical/Physical �1�
Trade Name Material P �,� Stormwater Pollutants
Descri tion
Pesticides (insecticides, Various colored to colorless Chlorinated hydrocarbons,
fungicides, herbicide, liquid, powder, pellets, or organophosphates, carbamates,
rodenticides) grains arsenic
Fertilizer Li uid or solid rains Nitro en hos horous
Plaster White granules or powder Calcium sulphate, calcium
carbonate, sulfuric acid
Cleaning solvents Colorless, blue, or yellow-green Perchloroethylene, methylene
liquid chloride, trichloroethylene,
petroleum distillates
As halt Black solid Oil etroleum distillates
Concrete White solid Limestone sand
Glue adhesives White or ellow li uid Pol mers e oxies I
Paints Various colored liquid Metal oxides, stoddard solvent,
talc, calcium carbonate, arsenic
�Curin com ounds Cream white li uid Na htha
Wastewater from construction Water Soil, oil & grease, solids
e ui ment washin
Wood preservatives Clear amber or dark brown Stoddard solvent, petroleum
liquid distillates, arsenic, copper,
chromium
Hydraulic oil/fluids Brown oily petroleum Mineral oil
hydrocarbon
Gasoline Colorless, pale brown or pink Benzene, ethyl benzene,
petroleum hydrocarbon toluene, xylene, MTBE
Diesel fuel Clear, blue-green to yellow Petroleum distillate, oil and
liquid grease, naphthalene, xylenes
Kerosene Pale yellow liquid petroleum Coal oil, petroleum distillates �'
hydrocarbon I
Antifreeze/coolant Clear green/yellow liquid Ethylene glycol, propylene I,
glycol, heavy metals (copper,
lead, zinc) I
Erosion Solid Partides Soil, Sediment '�
�1� Data obtained from MSDS when available.
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8.9 Control Dewatering
Foundation and trench de-watering shall be discharged into a controlled conveyance
system prior to discharge to the temporary sediment pond. De-watering shall be
performed in such a manner that disposes clean, non-turbid water into the conveyance
system. All channels must be stabilized, as defined in Section 8.7 - Stabilize Channels and
Outlets.
Highly turbid or contaminated dewatering water from construction equipment operation,
clamshell digging, and the like shall be handled separately from stormwater.
8.10 Maintain BMPs
Temporary and permanent erosion and sediment control BMPs shall be maintained and
repaired, as needed, to assure performance of their intended function. Maintenance and
repair shall be conducted in accordance with the respective BMP.
Sediment control BMPs, such as silt fence and drain inlet protection, shall be inspected
weekly or after a runoff-producing event during the dry season, and daily during the wet
season. Temporary erosion and sediment control BMPs shall be removed within 30 days
after final site stabilization is achieved. Disturbed soil resulting from the removal of BMPs
or vegetation shall be permanently stabilized.
The following inspection and maintenance practices will be used to maintain erosion and
sediment controls:
• Built-up sediment shall be removed from silt fencing when it has reached one-third
the height of the fence.
• Silt fences shall be inspected for depth of sediment, for tears, to ensure that the
fabric is securely attached to the fence posts, and to ensure that the fence posts are
firmly embedded in the ground.
• Temporary and permanent seeding shall be inspected for bare spots, washouts, and
healthy growth.
• The stabilized construction entrances shall be inspected for sediment tracked on the
road, for clean gravel, and to ensure that the culverts beneath the entrances are
working and that all traffic uses the stabilized entrances when leaving the site.
The maintenance inspection report will be made after each inspection. A copy of the
report form to be completed by the SWPPP Coordinator is attached as Exhibit 1 of this
SWPPP. Completed forms will be provided to the City of Renton, and shall also be
maintained on-site during the entire construction project. If construction activities or
design modifications are made to the site plan that could impact stormwater, or the City
of Renton determines that the measures are not adequate to prevent erosion and the
discharge of sediment (based on turbidity measurements), this SWPPP will be amended
appropriately. The amended SWPPP will have a description of the new activities that
contribute to the increased pollutant loading and the planned source control activities.
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8.11 Manage the Project
The following practices will be required during construction to properly manage activities:
• Comply with seasonal work limitations.
• Inspect, maintain, and repair BMPs.
• Identify an Erosion Control Specialist.
• Sample and analyze surface water discharges, if necessary.
• Maintain the Construction SWPPP, including narrative and plans, on-site at all times.
9.O EMPLOYEE TRAINING
An employee training program will be developed and implemented to educate employees
about the requirements of the SWPPP. This education program will include background on
the components and goals of the SWPPP and hands-on training in erosion controls, spill
prevention and response, good housekeeping, proper material handling, disposal and
control of waste, equipment fueling, and proper storage, washing, and inspection
procedures.
All employees will be trained prior to their first day on the site.
Training will be documented by recording the name and date of each individual receiving
the training (see below Table 9-1 Record of Stormwater Training).
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Table 9-1
Record of Stormwater Training
Name Company Date
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lO.O CONSTRUCTION PHASING
Phasing of this project is not anticipated. The construction sequence is described below:
1. Arrange and attend pre-construction conference with Applicant, Owner, Contractor,
Engineer, Erosion Control Specialist, and the City of Renton.
2. Flag the clearing limits and identify all significant vegetation to remain.
3. Provide miscellaneous demolition and clear and grub within the clearing limits, as
required for installation of temporary erosion control facilities.
4. Provide filter fabric fence, interceptor swales and dikes, rock check dams, and
temporary sediment pond, as shown on the construction plans.
5. The Contractor shall inspect the erosion control measures a minimum of once weekly
and after every storm event that produces runoff from the site. The Contractor shall
repair or replace erosion control measures, as needed.
6. Adjust temporary interceptor swales and rock check dams, as grading progresses, as
necessary to direct stormwater to the sediment pond.
7. Provide cover measures to include armoring, mulching, and hydroseeding to stabilize
unvegetated areas and prevent the transport of sediment laden stormwater off-site.
Cover measures shall be applied to all areas, as described in the standard erosion
control notes located on the plans.
8. Provide catch basin sediment protection on all catch basins, debris barriers, and rock �
pad protection. These measures shall be installed before work begins and not
removed until after the storm conveyance system is connected to the permanent
detention pond and pump station is activated.
9. Provide permanent drainage facilities, other utilities, and building, as they are
permitted and approved by the City of Renton.
10. Complete all utility installation and testing.
il. Fine grade site and provide final surfacing.
12. Stabilize all remaining disturbed areas.
13. Contact City of Renton for final inspection.
11.0 CONSTRUCTION SCHEDULE
Site stripping and the fill and grade process is anticipated to begin in April 2007 and is
expected to be completed by ]une 2007. Final construction activities are anticipated to
begin in June 2007 and are expected to be completed by December 2008. Based on the
construction schedule, construction is planned during the wet seasons of 2008. Measures
will be taken to prevent the transportation of sediment from the site to receiving waters.
These measures include the use of:
• Storm Drain Inlet Protection (BMP C220)
15 OQ � O
• Temporary and Permanent Seeding (BMP C120)
• Silt Fence (BMP C233)
• Plastic Covering (BMP C123)
• Mulching (BMP C121)
12.0 FINANCIAL/OWNERSHIP RESPONSIBILITIES
Tarragon, LLC is the party responsible for the initiation of bonds and other financial
securities.
13.0 ENGINEERING CALCULATIONS
Engineering calculations for the temporary sediment pond are presented in Appendix G —
Engineering Calculations.
14.0 CONCLUSION
This analysis is based on data and records either supplied to or obtained by AHBL. These
d�cuments are referenced within the text of the analysis. The analysis has been prepared
using procedures and practices within the standard accepted practices of the industry.
AHBL, Inc. �
Charles "Ted" Hill, E.I.T.
Project Engineer
CTH/Isk
March 2007
K:�Prime\Yr_2006�206200 Cedar River�STORM\Reports�20070326_Rpt_CSWPPP_206200_wp.doc
20070326_Rpt_CSW PPP_2�6200
16 OQ � O
EXHIBIT 1
Inspection Logs
Inspection Logs
On the following pages are sample inspection logs. These are only samples. Your
inspection logs can be of your own design
There must be an inspection log for each BMP. The Iog must indicate:
a. The date of the inspection.
b. Noted conditions.
c. If any discrepancies are noted indicate:
1) Who is supposed to make the correction?
2) The date by which the corrections will be completed.
I
I
i
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Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
To be completed at least once every 7 calendar days and within 24 hours of the end of a
storm event greater than 0.5 inch.
Inspector: Date:
Inspector's Qualifications:
Days since last rainfall: Amount of last rainfall: inches
Soil Stabilization Measures
I Location on site Date of Last Stabilized Stabilized With Condition
Disturbance (Yes/No)
Stabilization required:
To be performed by: On or before:
Cedar River Corporate Park
I� Stormwater Pollution Prevention Plan
i
i
; Inspection and Maintenance Report Form
�I
Perimeter Structural Controls
�I
Silt Fence
i
j Has Silt Is Fence Is There Evidence of
i Date Location Reached 1/3 properly Washout or
i of Fence Secured? Overto in �
� Hei ht? pp 9'
�
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Maintenance required for silt fence and straw bales:
To be performed by: On or before:
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Inlet Protection
Date Depth of Sediment Condition of Fabric
Maintenance required for inlet protection:
To be performed by: On or before:
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Stabilized Construction Entrance
Does much Is the gravel Does all traffic Is the culvert
sediment get clean or is it use the beneath the
Date stabilized
tracked on to filled with entrance
road? sediment? entrance to leave working?
the site?
Maintenance required for stabilized construction entrance:
To be performed by: On or before:
I
Cedar River Corporate Park
I
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Check Dams
Evidence of
Sediment Higher Erosion or Significant Is There
Date than �/z Sump Submergence Erosion Between Evidence of
Depth? Around the Edges Dams? Washout?
� of the Dam?
Maintenance required for check dams:
To be performed by: On or before:
� Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Changes required to the pollution prevention plan:
Reasons for changes:
� ,
I certify under penalty of law that this document and all attachments were prepared
under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gathered and evaluated the information submitted. Based
on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there
are signification penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Signature: Date:
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-�v yy�
I ,:..g ... ' W/DROP M6T.'.' ..._ �..-� � 'f", �•��STMO , ... '.. .. .. 160(k) �'
Y�9(ER E 24 O.P N 2 ,Y � .---- .. _..�`� _.... .. .�..._.._:- .__ �..._ _....� _. _ " _NU YIAIDt'_ _ .. ._ .__. \ YR'6�i 1 iW SiM9___ ' .. _�".'��,yz- ' R"':�.
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. . ,... ..._._ -__ ... �f . .. ..- .._.. . ..-
.. .. __'-.____. � :.,: , �- .
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PQE ,., : ; ,.
__..._.___ _.. &�� µ �" I
I � ; 910 NOj .. __. .._ ._ __.._... ' � I
�-�12'W WP - �"a`.�: 11'��W1►.b
x 13 CNP GUL�ERT 1E�t.0'
41T'p�pl^ •Y�� �OOYAI�•Iti�IY�
3 1I'�'..11^LULVIIIT �-.�IE�e.y
0 0 " D � CEDAR RIVIER CORP. PARK
T A C O M A � S E A T T L E �
7215 Norfi 30ri Sfse�S1iM 900,Tacorne,WA 98903 �.�,��,� E X I S T IN G C 0 ND I T 10 N S
316 OmdenW A�ane SMi,$uNe 32D,Seetle,WA 9870/ 206.26i]425 1fl
APPENDIX C
C-1 .............Proposed Preload Conditions
C-2 .............Developed Conditions
VERTICAL DATUM INAVD 881 i
� � CEDAR RIVER CORPORATE PARK � � � r�� �����������T�a�F��A
j °.,sw�an+5T �� ,,,_._ k �� f MONUYENT CASE APPROXNAIELY 6 FEfT EAST Of TF[CONSIRUCTED ''
SW 1/4, SECTION 19, TOWNSHIP 23 NORTH, RANGE 5 EAST, W.M. �3 ` ���' ` (SMIEAME Oi F1i5T VN1EY HN;HR'AY AT 1HE NORTHERLY MARqN 0�AN i
CITY OF RENTON, KING COUNTY, WASHINGTON ; B<� ` � FAST-NEST RPELNE Popli-OF-MAY
8' �o ' ; ¢�v�na+=ie.s4
I I � tf i�...`. '.'Sr.-v*H'sr��� CON14R90N FACNR�ROM NGVD 29 TO NA�D B8 IS+3.56'
- ' � ' � I I I ' I I � � s � HORIZONTAL DATUM !
�� ' ' ;�� a� 7ER RECOR�OF AIRVEY RECORqNC N0.950.T179003,B/Sm OH FOUND
�AH B L e' �� � : I i I I I I I �' � � NOMIMENIS IN SN 23RD S7RFET.BEMMG NORTH 89'S1'S8'MIEST
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RE R D
��� �� '� � � �"� j � LEGAL DESCRIPTION
0 �•,� �� e ��^ �... - . �� ]� � � S. CRIDE AND NSTA11 CONSIRUC1bN EN7RMlCE(S).
(,{ f ���. -� ' I '�'1"' -� Nl OF BLOCKS 2 FIA 3 ANO�075 27 PND ZB IN BLOCK 1.�lLl N C.D.FIILMANS 6. NSTFLL PERIMEIER PROlECT10N(SIIT FENCE,92USH BAfd�ER ETC.)
� IIQ •�,�� 1 3� w••• �����.,�.-','�. ..,..;i � EARLINGTON CARDENS ADp110N TO THE pTY OF SEATIlE.pNSUJN N0.1.ACCORDING TO
W j e,,,, llF .��( -�� , �,I ; ` .-��` 1HE PLAT 1HEREOF RECOftDED N VOLUME 17 OF PLA1S.PAGE(5)7�.M KING COUNTY, 7. CONSTRUCT SEDAIEN7 PONDS
� .-s.-3N ' sl : '' �....__ - __ ._.�,- �' i � MASFfNGTON: EXCEPT THE NE51 10 iFET OF LDTS 15 TO 2&MCLU9VE.M SND BLOpc S.
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IF,�.J � - � Iq.;� .�I PURVOSES BY DEED RECORDED UNDER RECptOED WDITOR'S FltF NU46ER 6391019;
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Q ��I��: ' �f � ' . � , � } � � I ��� TOGEIHER 1M1H 1HE VACAIEU PORllpl OF NAPLE A4ENUE SOUIHMEST(897H AVOIUE 4. (7tADE AW STAB0.JZE CONSIRUCTION ROADS I
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�� � �'. ,� w..:�� � r n " .� I$ : � PoGHT-OF-WAY MARQN Oi SOUIHWEST 275T S7REET E%1QIOfD.MA HOR1H OF 71£ 11. STA,tDARDSRAND MANUFA IURER'S RECOMAACCARD�Cf MI7H p1Y OF RENTON �'�
I E� - ,�i ;,�, � ,� _ � h J NOR1FfRLY PopiT-OF-NAT MlJtGN OF SOUTMMEST 2Jfi0 S7REET E%7ENDED M!D LYNC
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�� :� � � , �. --- -_ _-..____ .'._F,. �s" �z NSTAl1 NE`N YEASIIRES 50 MAT AS 4h C011qnON5 p1µGE.7FE ER040N
F''' ^� + �.:.;_1 '� ��'� ' _ = RENiON ERd90N IWD SEDI4QIT CONiROL STANDARDS, THE pTY OF
_ ' _ TOGETHER MTH iHE YACATED PORTION OF SOUTHMEST ZJRD STREEf(SOU1H 1601H
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SIREET)HANNG A MDTH OF 30 FEEf,LYING ADJACENT TO TFE SOU7HERlY lNE OF
r+, - r� --- - - � � I BlOCKS 2 AND 3,EAST OF iHE WES7ERLY 11NE Of BLOCI(J.IX1EtOW SOU7HERLY,!WD
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,. , �- - . �> S'.1� WEST N THE NESIERLY L1NE 0�BLOCK 1.IX7ENOED SOUIHERLY
a,." I . ,. . ;i -.. , . __ ' � �� 11. ROUpI CR/iDE STE.
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a� �_���-- . COYFR IVt1 AREAS 1HAT Ntl.L BE UN'FORKED FOR MORE 1HAN SEYEN OAYS
� DURING 7HE ORY SEASON OR 1'ND DA1S WPoNG THE 1�T SEASON Ni7H
�' �.�� . . _ :`� - � _ � _ � STRAM,N000 RBER MULCH�COIAPOST.PIASTIC S�EETING OR EWIVAIENT.
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�r.,,.,. C1.2 IESC h DEMqJTIpI NOTES AID DETNLS
'I TRENCH NOTE AS-BUILT REQUIREMENTS
���, ff MOPo(FRS ENTER ANl'TRENCFi OR OTHER E%CAYATION Fp1R OR MORE FFfT IN OfPTN hUT DOES NOT NEET THE OPEN Pli THE COHiRACTDR SHALL MAINTPJN RECORD DRAIN S OF 0.LL U11U71ES SHONN ON 7FiE PLANS AND EAS1kIG
' REpURENENIS Of MS�OT SECllpl 2-09.3(3�,IT SHALL BE SNOf�D ANO CPoBBED,7HE CONIRACTOR ALONE 91N1 BE�SPONABtf UT0.171E5 ENCOVN1ERm AS CONSTRUCTION PROGRESSES.11ESE ORA'MNCS SNNl INpCAIE DEVU110NS FRON iHE
��; FOR IYORI(Eft SAFETY M!D AMBI AS511MES NO RESPON9Bl11Y.ALl 7RENCFI SAFETY SYSIENS SHAl1 MEET 7F'E REOURE11EN7S OF 7ME OE9Rl PUN.REFERENCL pSTNICES BE7N@I 1HE RELA71\E LOCA110N OF 1HE NEMLY CONSTRUCIID IMPROVEIQIIS
' WASHNCIpI NWSTRI/�L$AFET7 AND F#AL7H ACT,piIVPTER 49.17 RCYI. �1O A PERYANENT MMKER 9iALL BE OBTNIED.llf LOCAlION OF S7RVLNRES,YAL4fS,BENDS,TEES,AIA
� UTILITY NOTE ATUA11YD1M1EUDUPodG COrb1RUCTIOri THEUCONIRACIOR SHC�QVE TNESE REC01�ORAMINCS TD THE ENGIrEER�
THE LOCA7qN$OF EXISTING UNDERGftWND UT0.171ES ARE APPR01WAlE ONLY IWU HA1�E NOT BEEN RUEPENDENTLY YEAKED BY 7HE ��A1ELY UPON COYPI£MXI OF ALL U➢l1TY NSTNIATI011.
°""��"T,",�5���Y��R19&E FOR MIYroE�o��a","T HMPEN WE TOu7HE CON�T��s CONSTRUCTION SPECIFICATION i
FAIUIRE TO LOC�TE EXACiIY AND PRESERYE ANY AND ALL UNDERCAOUND UR111ES.MIBL ASSUMES NO LIABLItt FOR THE lOCA710N CDNSTRlIC710N S71N.L�PERFORMEO CONFORYNNG TD 7NE UlE$T ED1110N OF hE NASFMNGTON STAIE IIEPAR711ENT
Oi UNDERGROUND U71lJnES. OF 7RAMSPORTATION STANDARD SPEpFICAl10N5. �
FILL SPECIFICATION WATER PRESSURE
FlLL MAIEPoAL$FiNl NOT CONTAN PETROIEUM PRODUCIS,OR SUBSTANCfS N41CH ME HAZARDOUS,DANGEROVS,TO%IC,Ut NHICN STATFC WATER PRE$$URE 10 BE DEIERAI:Nm
OTHERMlSE NqATE ANY STAIE,�EDQiJIL,OR LOCAL LAN,ORORUVlCf,CODE,REWUTipI,RULE.ORDER,OR STANDARD.
� AUTOCAD NOTE SITE ADDRESS
��. AN pUTOCPD DRANRlC FlLE IS AVAUBLE FOR 4TE U1'OUT. PARCEL N0.33�O/W285
�I FIRE SPRINKLER NOTE SITE AREA
-. MFIERE TFIE UNOERCROUND WAIER$UPPLY TEES OFF TO$ER�E ONLY A FHE SPRINNIER S15TE11,A SEPFRAIE DETAIID PIAN NUST T�Tu 4h ARE�'=126 ACRES I
! BE SUB111TTED AND APPROVED BY 1HE FRtE MARSHAL PRIOFl TD IHSTM1A710N. ��
' FIRE PROTECTION NOTE �
lliE FlRE PROTEC710N S1S7E11 MQUOINC NAIERiALS.9DNC,MID CONFlp1RAtI0N IS SUB�CT TO A CONIRACTOR PRON(IED DE9l�! BUILDING DESIGNER OWNER/DEVELOPER �
BY A FIRE PROTECTIDN ENpNEER,M!D AS SUCFi,1HE FlNAL OE9Q!Of TFf FlRE PROTECTION SYS7Etl.MlCLUUNG H7DRNJT �
LOCA710NS,MAY pENATE FRON 1HE SYSTEN 4i0MN.THE FlIUL DESI(N SVW!BE$UBI/TTED TO AIA APPROVID BY 1}f FlRF AFfBL WC. iARRACON.LLC ���
►�MSHHI..CONTRACtOR'S BID SHNL REFLECT iHE CO�71Q7S OF 1ME fHE PRO1EC710N EN(�NEQYS DE9GN.CONTRACTOR SHALL �5 N.30th S7REET,A➢TE}pp 1000 SECONO AVENUE,SUIIE 3200 '
COAIPLY WTH/Y.L NATIONJiL FlRE PROTEC710N ASSOqA710N pEOUIREMEH7S AS SET FORTH BY'KPA 13',17S AMRIDAENIS,AND TACONII MA 98�03 SEATRE.WA 98104 MCC
LOCAL REWREYENIS,MlCLUpNC BUT IqT UM7ED TO ACWISI710N Oi ALL PERUIIT B' �
UTILITIES/SERVICES °°"T�T: �w�',�T°" CONiACi:MURPHY 1ACCU10UCH Jvba*.�,�
v�a+e�zs�)aa3-s�r� vriare (zos�s��oo q0�
WATER: pTY OF RENTON F"" `�"�-25'2 CIYIL ENGINEER
SE►iElt: Q7Y OF RENTpI SURVEYOR AF6l,IHG � �
E
; CAS- R1GfT SOUND ENFRGY -
j PHONE: 0'AEST BUSH.ROED.h HITCIwNGS 2215 N.JOIh STREET.S4ATE 300 �i
�� �� ELECTPoC: PUCET SM1ND EIAiCY 2(109 MNOR AVE.FAST T�COMA MA 98103 ��"��a[q��,
� SEAT7I.E,NA 96102 CONTACT:CONNIE UNDEN
EARTHWORK CALCULATIONS �T�T 5��""� P"°"E: c25'��s�-Z`n
�:�2os�az�„u Fu� czu>3aj-ssn ���� CALL TWU BUSINESS CHECKED F08 COMPLIANCE � b�a�me
PRELOM1D FlLL=86,OW CY FAX: (4tl6)32�7135 r�e,r�+ova�. TO CITY STANDIIRDS
NOIE 7HESE qIIWTi71E5 ME FOR PERNT PURPOSES OHLY.THE CON7RACTOR SHALL OETERMNE HIS/FIERS OM! � . o�br.. 71ESE DRAwqlOS ARE NOT TO 8E BY DAYS BEFGRE YOU DI ���r";,�a
�Rn+worac auurnnEs. "°��� �`- ,�,� USED FOR CONSTRUCTION IRA.ESS er �� � A !,
"'"� �` SIOIED BY 711E REYE�NiO AOENCY B,. 1-800-424-5555 �� ��:�;��� ;
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� � ' �� �B""-j� �'=�oo' i '�'"�"�' � Cj'j'Y OF CEDAR RIVER CORPORATE PARK o3/os/o�
��0� � �
»,^�, BE � `` RENTON ' "`/�
T A C O M A � S E A T T L E �ec.�, ��� DATUM planning�Building/Public Works Dept. COVEFl SHEET ��� lrQ.�
I7215NUEi301�S1sel5u�e300.Tamw.WAYEIN 153]CL21aia NO. REVISION BY DA7E APPR i°'E"r'°°"`
7200 SMh Arawe.Su1e 1N0.SesUe.WA 98107 20l7671125� i �un � o:4
I �
� i �� ; 3, w GRAPHIC� sca� � VERTICAL DATUMK�NAVD 881
� �. C E D A R R IVE R C O R P O R ATE PA R K BUTTpI M7H PIINCH ON C9NCREiE POST NONU1p1T pONN 0 3 FDDT M A
I� �i YONUNENT CASE APPRO%MA7ElY 6 ifET E�ST OF 7HE CONSTRUCiED
E
� ��AE i�r �n, r�y SW 1/4, SECTION 19,TOWNSHIP 23 NORTH, RANGE 5 EAST� W.�. �hANE��E�TY�N#IAYY AT THE NORTHERLY NARpN OF Ak �
I � � " ' '"`x ` 10 " CtTY O,F REf�TpN, II�NC�COUNTY, WASHINGTON aev�na�-ie_e� �
, . .
j z''�..���12"� ' ..li . .� _ �� � � _ _ _ � � � _ _
� I���� � . CONVER90N FACiCXt FRON NGYD 29 10 NAYD 88 IS+3.56'
� �,t ��,, � � ; GENERAL NOTES LEGEND HORIZONTAL DATUM !
f ;: ij:lu`"i � . " ,-,, � � 1, CON7RACTOR$MALL CONTACi UTILITY PURYEYORS PRqR TO CpISTRUCTqN
�� I�l.,> �'�� .a� �� . - �,:. �.- �� - - _ - . - - � - - LOCAif UTILJ7IES CCNTACT FNpNE62 ff qSCREPAHQES OR CONFL1C15 . � . QEAANG/WORK LRMiS
.. I . �� I f f I ,� �':�:. _ '� < .,,:.`. ' . " , . . r SM1H PROPOSED UThJTIES. __..____�_hNPOR1RY INiERCEPiOR$MALE � PN��OORO M SW 2JRD STREET�.BEAPoNG NORTH8951�SB�D�FWND
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� �"" ��`� �3'� �` -"- ' � - -- 2 ACTOR ALL Po AND VERIFY 11H U 71ES A �
; ., ., .. ■ . CON1R SH 1HOLE E7�S C 71U LOC iION, e
� �V p o . � `- .WTUNE jT1P� . �. �: .-`- . .� .. � ���� 4ZE.AND N�EkT/CROMN ElEYA710N/S REOUIRm TO CONSIRUCT r - --Fll7ER FI�BRIC FDKE I.
aAHBLe . f�lv`rt�s � �� '.,�-�.".�"/�rr ;�,+���---� 7 ,�tf""�".,_,.�"' _ _� rrtoeosmwv�oro�a�. �
, ��,QU1�NE,�} - -� `�'ph: '�a��� �G��,., s,,� �.�� �/�/ii`-r/f �.� ri�� i 7'F� ��%/ .r�fl�Jt�110ECUiH �,rp; ,.� PH � RIP-RM PAD� i
i l�,-' � �� � n x�� _ ,�� ���""�,�; . ' �; -, f .� Gf1CNE(1N)�_. }. QEAR ANO pN6 SITE NI7FiM CLEARiNG/MORR U►N1I CONiRACTOR 4iALL t.t
I�= . ,���.� CATpiBASN SEDIIEHT PROTECIMJN�
ol IJ� � I �I. i ' � _ �1 � t.£n2��:.'Y�ft� % S�,'�'P �t2�.� ;; ��/J,�i� ! .: - PROffCi MERANO AREI�INQUpN6 BIiFFER �
� t
Y �'r. I , : f--� -�� � if : �!< � -����^-?`-""-' i. CONTRACTOR SF4�11 PROIECT E7USTINC'AEAAIDS IWD'l�TUIND BUFFERS
Q "'I I�:: � � ��}i � �� � �-:' � NO WOPo(SNNl BE DONE M7HN NERII�L AREAS.CONTRACTOR SNALL
•'' -�
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10 •-�__ ��'���'�a CONSIRUC110N EN/RANGL
a. PRO.ECT BENCHIRW(dl I � ,I' � . . . . . - - . . .� ._ __.- -_",_,_ _ ..:� ENSURE Nl NECESSARY NEAAIRES ARE IN PUCE AND MAINTAMED TO e
i��' � �} ��� . � �- � -� �-�� PRE4ENT CONSTRUCTiON RUNOFf FROM QJTERING DE9CtUTED NEILAND
• N: 5519.52 I I . � r�. �,_ ' 24�- 4 MEAS. a°°o°°o
� E 1971.24 f�����.� I � �� �' �� 23 �� - - -- -- - --- - 5. �' E%I pt
, :i . b„� _. ._ -._..-.._,_ .-_ � � �:: ,. _ _� o S1INfi ADE$
, - . -a PRON�PoP-RAP P � � [ PRONDE 71RE WA9NC AT CONS7RUCTION p1TRIWCf AS NEEDEU. a '�'
V
i
� _ _
Q � ��. . 'F �d,� eo�° o°a°o IE-22.13 . �1 CONIRACTOR SHNl SMEEP ANDIOR 0.EAN ROADM'RY AS REOURED. � ,
ME
�i - � , �I��� � �o a� oedoo . .
I B�l2 . 12 (7YP)
V I TOP OF NE B/g BOIT �f i� 18 TYP �1° '<<4 a°a °� o „a °��o� :--_ � . � � GRAVF.L LNEpC OMI I
OF LUNINNtY E1fY�23.111I1_ � i�� � 33df`1R�1 '.. ..�"� ,,,_ 6. CON7RACTOR SHHL PRONDE MEASURES FOR DUST CON7ROL 1.2
� .. �� t Cl1lVfRT 0�.3x '. ° � �
__ F1
W _� '... 'S__I _ v I i u' I /i � �� 4__ ._ � � R� � 7. PRONOE INTERIM CATp1 BA9N PROIECTION AT ALL OOS7INC M!D NEMIY
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�` CNECKED FOR COMPLIANCE
r ,, ,, . r� , �� :_ ,�.;f�f'f�i;, , -: � � CALL TWO BUSINESS TO CITY STANDARDS
�,�'�.�, % ��__ cTMP� .. ,. ' ,. '„�/ �;' � AYS BEFORE YOU DI �a°°�""'s
r� ,��r�. ..- .�__�__ ...d. . t:.._..._..�..w-�-. � ,; ..�E� - -r- - - - i11E8E DRAwINA ARE NOT TO!E B`" o�� � .�°^;�
� ' �g - - - - USm FOR CONBTRUC170N UI�.E88 3 `°"`
` - -- - - = - -
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•- =" ���' !-� ; � _ - - ' - > _ o�P+.F ����� euNe � SIAIED BT TIE REVEwMO A9ENC1' a., ��.r.,�.�.
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� �No�: nns uNE vsus o�ra�� soun�ov � � �w.. °� � � =40 "�°""'�"' A� Crj'Y OF CEDAR RIVER CORPORATE PARK �o3/os/o�
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°'-'� , .�� � RENTON "`
� � ._- < ---- --�sSu°c'oo�u�m`tF' "'�" �`p' '' o^''ur� Plannirg/Buildin Public workc �evt. TESC&DEMOLITION PLAN EAS
� - - - - TACO M A � S E ATTL E �� I 9� I '/ C�.�
� 72t5 NoM 30tli 9tleel Sille]00.T�mre�.WA 9E/03 751363��a N0. REVISION BY DATE APPR �'� •'•i•m�••
■ 12p0 Scli Avriw.9ub 1R0.SMIe.WA 96101 Al.7R1�E 7n � 3 4
CEDAR RIVER CORPORATE PARK VERTICAL DATUM tNAVD 881
; an a�+ra�e,�s�n a att��csw�ac�i�co.rouxo aa eanss
eurra wn�vur�a+or��h vosr�w�[i+T oo»+0.3 roor N► �
MONU1ENi CASE APPROI(I/�7ELY 6 FEET EAST OI THE CONS1ftUC1ED i
SW 1/4, SECTION 19, TOWNSHIP 23 NORTH, RANGE 5 EAST, W.M. co+haNe a usr vwtr N�a+�ar�r TMc noen�crar wwar+a iw
CfTY OF REIYTOW, KING COUNTY, WASHINGTON ��A�ST R&&E PoQiT-OF-MAY. i,
CONWt40N FACTOR FRpA NL19 29 TD NAVD 88 I$13.56'
I HORIZONTAL DATUM
I j -. PQ7 RECORO OF SURY£Y RECptDING N0.9503179001,BISED ON FWND
;i r a"-e'iocs I YONU1k)I1S IN SM 23�S7t�ET.BEARING NORTM 8931'S8'MEST
� � EROSION AND
r-Cp,T[R L�PoC 4AlEAlAL 60"MJE RqLS. / 5'
� vsc sT�n.cs a+w�rtc aNcs To�n�w I R,* -� � � i � SEDIMENT CONTROL NOTES '
� F,�a�.o wR�
� z"e�x't�c�.wa[ I V�� I I MGROYILL OF 1}iS EROSION PNC SEpYENT CONTROL ESC %.AN DOES NOT I
r�eme w+carv. � EIuSTNG CAWND ��3 rtew J �..� � '� . i i 2a• CONSPNh AN APPROYAI OF PERMMk.NT ROAD OR DRANAGE DES�T!(EG., �
- � I ' I? � Slff AND LOCATION Oi RO�DS,�PES,RESiRiCTOFtS:p1ANNELS,REIENTION
� i �-euRr�ona o���mc � ��a L� � � � FAQ�71ES,VP�nES.EiC.).
7�_Q• � M�TEA�K A B'BY 12"iRENCM I 2� Y
Q -0 �� 2. 1HE��P L E ME N 7�T I O N O f 7HESE E S C RAN S AIO THE CONSTRUC7NIN,
� + o � - . ` �� ��RE�PAO�N9Bl.ITY O�FMETM/1ET'M�RICAN�T/�NCSUPERV�ISO�R UN L NLu71E5 IS
a � � 6- - � I
� I I s'w� �I i I� LOG CHECK DAM
L �l� J j �,�,�„��s��.
O "T� 6• 3. n+e ewro�s a n+e araa�c un�s�o�r+a+n�s r�ui s+ui e�
V � c�r rucc�n er�camr,uous�+cn+a suavEr r�v�(ac r��c.
ex�m�c cr+awo F REaNRED)PRqH 10 CONSiRUCTKIN WDUIt11NC THE CONSTRUC710H PERIOD,
� n�nn v,�ame unme��� �oo'wH. I NO p51URBANCE BEYQIO iHE UEARNG 11YIT5 SHALL BE PEIb11T1ED. THf
� i 6� (N�Y BE REDUCED TO 50�41N 1a' CIE�PoNC UII7S SHNl BE MNN7�IED BY THE APPLICANT/ESC AIPERNSOR
FpR$�TES Mrti�ss TMu+i
raa n+E ouuna�a ca�smucnou.
3'B7 2'BT Ia GA �CRE 0�EXP(YSE�SOk.)
� �+r+.c r�emc or cau�v I R.IS'YN �. 1HE ESC F�pL1TES SIiONN ON THIS PUN YUST BE CONS�RUCIED PItIOR i0
� z-n'
Qt N CON��1qCilpl M1H ALL QEARNG AND QtA[NNG 50 AS 10 ENSURE
Q varnwc�/i-i.s'w.sNco� s'-o� � ROCK CHECK DA6A iHAT iHE iRAN590RT 0�SEDYENT TO A�FACE WAIERS,ORNNA(�
cr+.�ri e.a�u w*r+c�a u�o �2• �-n�[asru+cc sucN nui�anrs�s a SYS7EY5 NO ADJACQIT PROPERTES IS MI�MNZm. �.
Q ON BOTM 90E5 0�R1ER�ENCE ; . .. 15� � r M[pF EIX1A.[LEVATIOn.� N"S '
W �ABAIC ON 1NE$URf�CE � B'uN 3
s. n+e�sc v�aunes sHa�++a+n+�s ai.�w u�n[wM�w r�ax�Nrs
�"� i � � � B FOR/iNTIpPATED 9TE COIWITIONS. WRNG 7HE CONS7RUC710N PERI00,
z'er�•woao cesr EUSIING DRIV[WAY THESE ESC fApl1TE5 SHALL BE UPCRADED AS IFF'Dm FOR UHEYPECIED
ALT. S�EEL FE110E YOSTS. NNW OP 511E ACQ55 �� 1 STORII E1£N7S At0 YOqiIED TO ACCOUNT�OR CHANpNC 91E COIAi710NS
rro�o �s �' (E.C../�DOI710NAL AIYP PUlvS,RELOCA7101I OF pTpiES ANO 9LT Ffl+GfS. �
BRUSH BARRIER I ETC.).
Hrs
.v�-s '��"P 6. M ESL FAQUTIES SHM!BE INSPECiED DNLY BY 1HE A7PLICANT/ESC
511PfRNSOR NID MANTANED TO ENSURE CONTMAIED PROPER FINICMINNG.
NO1E5: SPAGNG BETWEEN CHECK CAMS NRITTFN RECOf�S SNHL BE KEPT 0�NEEI(LY RE�AEwS OF 1HE ESC
` g`ORn.9e»�'w"a�i�v°"a.oa�ewu:asarw¢mw� } o�rtn`w�s�eµu�m..Bc.�ruca wni�Ir wr�N FAW7ES DUaNG THE�ET SEAS011(OCT.1 TO APRL 30)AND OF MON1FlY
} Y4Ort14 hliE SlEFR1E55 PCIIPU4C10.Yf lb iFNCE U1E e. rartn rwaec rtr.as s��u x aw.co wcM na Y-a'rtocK RENENS WUNG TFIE DRY SEASON(NAY 1 Tp$EPT.30).
5�.�. «��(RMYm TRM 1156UL M1IMPDSC.BV!1qI BFI011E
mc ws.�sc+a.�..s xc+rcw.�wn�sr�muzm. � 7. ANY AREA$Of p(POSED$OILS,NCLUDINC ROADWAY EMBANI(AENTS.1HAT
�. u�w v[[t m ovE+n,vu n.w v�n��[wcn��o nc now N41 NOT BE pSNRBED FOR 7N0 DAYS WRqIG 1ME NET SEASON OR SErEN
rcxz or ioo r. �. Rrt.r.snc rv�as s+u�ec.rsxcrto..ca•mr �. u..i:o e'w��r wax.a o�d�w�«t ro.w�oo,oa o. i
u�.Ex cur nwrw.;uo�r i[wsr o+tr�urd+c � 7�' DAYS WRMC 7HE DRY SEASON$HALL BE IIMEDIAIEIY STABII2ED M1H 1HE I
� v�s�u,m n�i.w�iwe u.s�sr�,w� �st-�c wo. •xaoerEn uw.r�,...r ace.ws v�.«ee�.nc ano...waiwo:.�m'rn.i i.no�xcroioae APPROYfD ESC MEIFIODS(EG..$EEDNG.MULCHN6.RAS71L COVER�/G. i
]04 wK ELS s��uu!C[GUK`0 Ort 91�a.ile`mw ~ ]. Tne 100'm x.wm Iw�qln f�dl b�I�gMm�E a neca�aY�o �[..
11E 9E�E 43E • 6Si 6 1ME SQL Uw ew4 T+nglfH. � I
, �..e �n.,�d o�oi e.ow.a�<0 1n�wAr',ynt-o�-..ar.
B. AN7 ARUI NEEpRIG ESC MEAA1f1E5 NOT REOURING IYMEpAIE ATTEN710N
ROCK CHECK DAM 511N1 BE MpRESSfD MTMN fF7EEN(t5J DI11S.
I �LL.TCH CABRIC lENCE DETNL tEYPOIUAY COM4f11UCTOM QIfRANC6 NTS �HHCI�D/J19
�o.,�mro. �O.a�.a�a� a�n v�,w 9. 7HE 6C F�Q17ES ON INACIIYE 97ES 51U11 BE MSPECTED AND MlVNTNIED
•'�• u.w+cw,w � � ♦�I• ur u w` • •�• ur o� `� A NNMUI OF ONCE A Yp1iM OR M71iIN FORTY-EIGHT(18)HOURS
'�n°�ui,. �"Opn wiw �Ol10MNC A STORM EVFNT.
cwc w.w��.eoee 5^PIGE:BO88 ' e«c.wa�:eoee sv a.ce eoea � owc wwE:eoe� sv v�ce�.3oe� 10. AT NO 7�E 41N1 MORE THNI ONE(i)FOOT OF SEDINENT BE ALLOiAED TO
� FILTER FABRIC FENCE 2 CONSTRUCTION ENTRANCE 3 CHECK DAMS �����N A CRTOi 80.4N. ALL CATCH BAS1N5 AND CONYEYMICE
u+Es s��ru a�a��o cRaa ro P�vNc. TMt aFu+ec oatruna+
SIIALL NOi RUSM1I SEDiMENT-IADEN MA1ER HITO 7Ff DOWISTREAY$TS�FM.
NOT TO SCALE NOT i0 SCALE M]T TO SCALE 11 STABl1ffD CONSIRUCTION ENIRMICES AND ROADS SHNl BE MSTALLID AT
lllE BEQMIMG OF CONS7RUC710N AIO YNNTNt�D FOR hE WRATI(MI OF
EROSION CONTROL ��Ci �n�u YEA�,�,�„�NA�,P�,YAY�
REW�RED TO ENAIRE THAT ALL PAVED AREAS ME KEPT CLEAX FOR THE
� 'WET SEASON' REQUIREMENTS PLASTIC COVERING NOTES ITYDROSEEDING NOTES °�""°"°"��'"`T
M!Y SITE Mhl F](POSm SpLS WRING THE NET SFJ�SpI(OC70BER 1 TO MPoL 30)9iAL1 I. PLASTIC FiEE1MlG SHALL HAVE A YMlIMU4 TNICI(NE$$Of 6 MIL$AND SHALL MEET 1 HYpRLS'cLDiNG 91Ai1 BE MPUED TO AO�ES RlqCATED ON UNOSCAPE PLANS. 12. ANY PERNANENT ROW CONTRUL FAql1TY USED AS A iE1VORARY SETRIIC
BE SUB.ECT TO 7HE SPEqAL PRON90NS BELOM.1NESE SPEpAI PR�NSIONS FRE ?ME REWIREMENTS 0�71[STATE STN7IDARD�EpFlCA110NS SFCTION 9-74.5. BASN 9iFLL BE MODiFIED N17H 1NE NECESSN2Y EROSION CONTROL
REWKtED tt�ADDI7N7�10 1HE STAND�RD ESC COVER YE/�A1RES MESE PRON9pN5 2. HYDROSEEDNG TO BE AS SPEpFlm H LA�OSCAPE SPEpFICA710NS MFASIIRES AND SHALL PRONDE ADEWA7E STORAGE CAVAqTY. F 7!E
NCLUDE COVERNG IWY NE7lY$EEDED AREAS M1N YULCH AID IIAENIIFYMC MO$EEDNG 2 CUYERING 41►ll BE MSTI4l1ID NA MAMiRWm M}i1LY IN FUCE BY U4NC FACIJtt IS t0 NNC71p1 Ul1M�lELY AS AN NIFL7RA710N SY57EM,lHE
A$Wpl qSiUtBED AREII AS P054B1E PPoOR TO SEPIEMBER 23 IN ORDER TO PRONDE SAIUBAGS OR 71RES ON R07E5 MTH A N�llWM 10.F00T GPoD SPAqNG IN ALL 3. APPUCATqN TO BE 100 lBS/ACRE. 1�MORART FApl11Y MUSi BE GRAOED 50 1HA1 1HE BOTTOM AND 4DE5
CRASS COYEH FOR 7F£NET SEASON. DFECTIONS.ALL SENi$SHALI BE iAPED ql IIOGFITED DONN F11LL LENGTH MO AHE AT IFAST 7VREE FEET ABOVE THE FA1A1 GRAOE 0�llf PQtYM[NT
7FERE SHALL�AT tEAST A 12 INCH OYERL►P 0�ALL SEAYS. 1. 500 1B5�lI()tE 10.20-20 iQtIl1ZFA.2000 LBS�ACRE NUlpl M!D 10 LB$/ACRE SOl fACUTY.
1. TF#ALL07iED 7MIE 7NAT A qS1RUBED AREII CN/REYAN UIMORI(ED M7HWT C01�ER STAB0.IZER TO BE APPUED N1TM SFED HXTURE.
MEAAH+ES IS REDUCED i0 TMD(2)DAYS,RATHER 1HM1 SEVfN(7)DAYS. 3. (XENt P1A571C COYEPoNG S11lVLL BE MSL1LLm NNEDIATELY ON AREAS S�m 11. N1ERE SiRAW MULCH FOR TEYPORARY EROSION CONIROL IS REDURfD,IT
BE7'IiEQI NOVDIBER 1 111D MMCN 31 A!q RENNN UN11L VECETAlION IS FRAIY S. SFID BEDS GLANTED BETYYEOI MAY 1 AND OC70ffit 31 NILL fiEQARE IRRIGA710N AIA SNMI BE APPUED AT A MfqNUM 1FIICI(NESS OF 2 i0 3 hlCHES.
i 2. S70G(PIIfS AND STEE►P CUi AND Fll SLOPES ME TO BE PROtEC7ED IF UNWORI(m ESTABLJSHm. O7HER MANIENANCE AS NECESSARY TO FOS7EFt ANp pROIECT i!E ROOT SIRUCNRE �4. PRqR N TFE ff(7NNING Of THE M�T SFASON OCT.1,lY.L pSNRBED
�. FOfi MORE 7ViAN 72 F10UR5. NtEAS SWLLL BE RENEMED 70 DENIFY MHICH OIES C BE SEmEED IN
'i 1. N4EN 1HE COVERNC IS USED ON UN-SEEDFD AOPES,IT SHML BE 1(EPT IN PLACE 6. FOR SEED BEDS PLIUIIED BE711EEN OCTOBFR 31 AND APtEI 70.M110RNC Oi 7FIE PREpNtAlION FOR iNE NNIIER RNNS. pSNRBED AREtiS SHALL BE SEFDm
3. CUv4R YA1Qtl1VlS(PLASAC.MAT7NG,ETC.)SUFflCIQiT TO COYQt FLL pSTUtBED IRIR 1HE NIXT�MIG PERII�. 5�ff NLL�1[CESSANY.(EG.CEOTIXIRES,J11E MAT,UEM MS11C M7HM p4�1(pF 1HE gEpNN�NC pF 7HE IET SEASON. A SKE7CH NAP
NEAS 9Ull BE Si0C1(RLED ON 4TE C01fPoNC.)
5. PlAS11C�!G SIEET SNALL�BUaED 1M0 fEE1�T 11#!W 0�SLOFES N OF 11105E�1tEAS TO BE S�DED AND h105E MEAS TO REMNN UNCOYFRED
4. IiLL AREAS 7HAT Af�70 BE UNNpIXED WRING llf MET SEASpI 91ALL BE SEEDFD or�rs ro v�T wra��hx�vx e��+m scrrs. T. ffFORF SfE01NC.NSfALL NEFDED`_U3ACE RUN�i CONIROL 1EASURES 41CN AS STINl BE SUBYTiFD 70 711E ptt OF REN70N NSPEC70R. hf Qtt Of
MI1MN OIE MEO(OF 1NE BEqMING OF 1HE OET SEASOH. ptApENT IERRACES.M7ERCEPR7R pNES,SI'NES.LEKL SPREADERS AND SEDNENT RENTQN NSPECTOR CAN REOUIRE SfIDINC Oi ADp11p1A1 AREAS N ORDER I
6. 7ROPER MNN7ENANCE INQWES RECUTAR CFfp(S Fat RIP$AND pAODCm EM15. 80.9NS. TO PRO7ECT$URFACE WATERS,ApJACENT PROPQt71E5 OR DRPINACE
5. ►ULCH IS REOURED TO PROIECT ALL SEEDED AREAS F���� Nc�p
8. liff SF.EDBED AIKl BE iNtll M11H A FA1lLY FlNE S11RfA(Z.NLLOMNC SURFACE e'
6. R�T`I(50)11NEAR GEET 0�S1lT FENCE(MA 1VIE NECESSMY STAKES)PER AQtE OF MULCHING NOTES ����.���ALL OPERII110N$A(Rp$5 QR AT RI(Hl NNtF$TO THf SLOPE. q�.J�t°������
DISNRBPNCE NUST�$TOqfNIFD ON SIIE I. MUICH MATERALS USED 91N1 BE HAY OR SiRAN,AND SHALL BE APPL1fD AT THE
9. FERTLIZQtS ARE 1D BE USfD ACCORa1G 7p 9UPPLIERS RECOWElpAIIpIS.AAIOUNiS
RATE OF 2 TONSI��. �
DUST CONTROL USFD SHOUID BE MIM1Zm,ESPELiH1Y 11pJI�CQIT TO MAIER BWES MD Y[lUNDS. r- -��
�� 1. OUST IS TO BE CONiROU.ED ON TME C9NS1RUC110N 51E. 2. YULCFfS 4fALL BE MPUED N ALL IREAS MTH D�OSED AOPES(XtE�TER 1HAN 21. '� 4,� .E
� 2. MATER 7RUp(YAl BE USID 70 CON7ROL WST ON ORT/GRADFD AREAS QILY. 3. MUlC11l�SFULLL�USED IMIEDI�7FLY AFIER SEmIHG OR N AREAS MMCH CANNOT ��on�t�`P �
BE SEEDED BECAUSE OF TE SEASOK
3. �a 4�aurwFr is ro e�c�e��n er ovo+us�a w�m�+c. ���� CALL T WO BUSINESS CHECKED FOR COMFLIANCE ov�s b/4/OJB
4. ALL lIREAS N�INC YULCH 41ALL BE COYQQ�D BY NOVEMBER I. ppq qppRpYAL TO CITY STANDI,RDS I
DAYS BEFORE YOU DI �=°�"�'�
4. CRI1ROliNC WST pl PIIVED ROMNAYS IRL BE OONE BY TME USE OF A SMfEfPER a�� TIEBE pRANN16S ApE NOT TO 8E � _pq� 'F¢°"eOB1'��
M
GTpIBA��s.�s'��'�`�.No ma,aT Fxou sr���s s�ui r�na n�e �:f-����_� �� usm FOR�oNsntuC�u�[ss 9,� 1-8 0 0-42 4-55 55 -�� ,�'�e=�;.
;� : „�„�, sw�n er n��v�w�o�oo�cr BY _�,� .�.�:�a;:
�� m""""" em+ a". �.��, � �•�o3/os/o�
D Q - � � ,� ,�s srawN I �"'" � CEDAR RIVER CORPORATE PARK
� CITY ()F �..._
�-BE `` RENTON �,,,,,
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isoo smn�w.,.,sw.�exo.s.aw,wn eeio� meaar s�as rn NOTES&DETAILS 4 °^4
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CEDAR RIVER CORPORATE PARK DEVELOPED CONDIT�ON EXHIBIT C-2
APPENDIX D
Soils Information
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SOIL SURVEY OF KING COUNTYAREA, WASHINGTON
Cedar River Corporate Park _ _, ��� '�
MAP LEGEND MAP INFORMATION
_ Soil Map Units
o cn�e5 Source of Map: Natural Resources Conservation Service
� Detailed Counties Web Soil Survey URL: http://websoilsurvey.nres.usda.gov
� Detailed States
Interstate Highways Coordinate System: UTM Zone 10
Roads Soil Survey Area: King County Area, Washington
+—+— Rails Spatial Version of Data: 1
',���,� wa�e�
Soil Map Compilation Scale: 1:24000
Hydrography
�, Oceans �
A�A�A�A� Escarpment,bedrock �
������� Escarpment,non-bedrock
`"'�`-^- Gulley
��������������� Levee
Slope
v Blowout
� Borrow Pit ,
� Clay Spot I
• Depression,closed I
� Eroded Spot
X Gravel Pil
Gravelty Spot
^ Gulley
/` Lava Flow
� Landfill Map comprised of aerial images photographed on these dates:
�. rv�arsn or swamp 7/10/1990; 7/18/1990
p Miscellaneous Water
v Rock Outcrop
+ Saline Spot
Sandy Spot
�� Slide or Slip
0 Sinkhole
� Sodic Spot
= Spoil Area The orthophoto or other base map on which the soil lines were compiled and
4 Stony Spot digitized probably differs from the background imagery displayed on these maps.
As a result, some minor shifting of map unit boundaries may be evident.
�r� Perennial Water
USDA � zuurces W Wet Spot W0b S( �y 1.1 I (
�� 1 ou Service Netional Coo� Soil Surve�y p� q
Soil Survey of King County Area, ��'ashington Cedar River Corporate Park
Map Unit Legend Summary
King Countt� Area, Washington
�Tap t'nit Symbol '�1ap Unit Name Acres in .�,OI Percent of AOI
AgC � � .=�ldenvooe�gravelly sandy loam, 6 l b l.1 ?.9
to l 5 percent slopes
:�gD .�ider�ood �ra�ell} sandy loam, 1� :1.0 1.5
to 30 percent slo}�es
BeC Beausite cra�ellv sandy loani, 6 to 14?.l 7.2
1� pereent slopes �
Be1� 13eausitegra���11� ,�inij�� luam, l� to �1.-1 1.�
30 percent slope�
InC Indianola loamv Yine sand_�#to 15 t�.1 0.7 �
percent sIopes
\g \���hcr�� tiil; lo�:m �I.�� -�.�1
���'�-���'����s� Puget silty clay l�atn �:�` 137.6 `� 6.7 ����=
-�.._... �,��;. ,_..,, � .•;��,._ ti �; ,� �;,�.� e_
P�� Pu�ailu� tii�e ;and�� l��am ��.� 1.�
x Y�-�.u.. �� `��v`� �'�>i �'� ` � � <} �--��8 � .�- � ���'���� ��'�'��� ��� k
Sk �� �Seattle muc�. � ��� � 2.8 �� � � � �'
Sn �r,�,h�,mis}�:silt loam It���.' 4.�
�
Tu Tukwita muck 62.� 3.p
L�r � rb�in l�in�i ?-1?.� ;6.�
�_ VVater �� ��� 29 4 ,;�
<���?.� � : ,�.�.;:. f ,_ �� „ �.p4,.,.. _ ,�:�ss ,
�'�'o ��c�odin�ille silt loam 316.3 � 1�5.4 �
III II
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I
II
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�;�'j�,4 N:�tural Resourcrs \�'eb Soil Surt'e�� 1 1
12:'1 r20p6
r� Cm��rnatimi�Cenice A3lion3l CooG�erz[i��e Joi'S�.ir��e� P��e� uf i
SYaicaz soils in dep�essions. Some areas in the Repre�entative prcfile of Pi:chuc:{ loamy fine sand,
vicinitr cf secticn 5, T. 2E td., 3. 7 E. are as im:ih in weodland, 650 feet north and 800 feet west of �he
as 20 percent deep c_ilty clay '_oa_-n� that hai�e � ver•y scutheast corner of se�. �8, T. 21 N., R. 5 E.:
dark crown s�rface layer and a reddish-yel;ow te
c=ice-yellow subso_1. Cl--C to 20 inc?�es, very dark aray f1�YR 3!l; loariy fir
Fer�.eability is r.�oderate. F.eots penetrate easiiy sand, dark gray ;2.SY 9/1} dry; s�assive; soft,
te the bedrock. Available water capacity is mederGte. very friable, nonsticky, ner,piastic; few reots;
P,uncff is slow te mediva., and the eros,cn hazard is neutral; clear, smooth beundary. 15 tc 23 in�hes
sliah= to s.odera�e. thick.
^tis Ova�i soil is used for timber and pas_cre. rZ__�G tc 25 inches, 3ark crayish-brosJr (2.SY 9/21 l�amy
Capabilit•y u�it _':e-2; woodland gr�cp 3d1. fine sand, gray ;1GYR 5/1) dry; massice; soft,
very friab':e, ncnsticky, ner.plastic; few roots;
Ocall gra:-elly loar�, 15 to 25 percen- slopes nectra�; abrupt, wavy boundary. 9 to 9 ir.ches
�OcD) .--ihis hilly soil '_s cn cplands. �reas thick.
are irreaular in shape and ran�e from 40 to about ��3--25 to 30 inches, very dark gray and dark-pray (lOYR
15:i acres in size. 3/1 and 9/11 fine sand, dark aray (10Y� 9%1; dry;
Some mapped area� are up to 20 percent inc'_cded massive; soft, very friable, ncnsticky,
�iderweo3 grave'__y san�y loam, and some are up te 10 ncnplastic; few rcots; neutral.; abrupt, wacy
per=ent Heacsite cravelly loam. boundary. 4 tc , ir.ches =hick.
R.uno°f is medi:u�, and the erosion hazard is se- ,�q--3� �c 38 inches, 3ark-gray (lOYF 9/1; loamy fine sand,
:�ere. grayish brcwr �;"_DYP. 5/2) dry; massive; soft, very
This scil is used for �imber. Capabil=:ty friable, nonsticky, nonplastic; few roots; slichcly
cr.it Vie-�; �cedland group 3d1. acid; abrupt, aavy boundary. 6 �o � inches th_ek.
_5--.sE to 60 inches, black (lOYR 2/i; gravelly sand, very
�call gravelly ioam, y0 to ?5 percert slopes darx gray (1GYR 3i1? dry; single grain; loose,
iCcF; .--7h�_= soi� is cery steep and mos�ly cer.vex. nensticky, r.oap'_astic; few roots; neutral. M.any
_re areas are irregular in shape ard range irom 50 to feet thick.
abcst 3C0 acres iz size. This soil is si_n'_�ar to Ovall
gracelly :oas., C �0 15 percert slcpes, except t�at The C horizen ranges from very dark ara_�� tc dark
depth to the sn�erlying andesite averages �0 to SO gray aad qrayish brow:,. It is loamy finz sa�d �c _`ine sand
i-��hes. that is up to 15 percent gravel. A few layers are mcre
Some areas or tre lcwer slopes ase up to 15 per- than 15 percent gracel or cobblescones.
�ent included A:der wcod gravelly sandy loam; some Some Rapped areas are un te i5 percer,t inclnsiens cf
�re up �0 15 �ercer,t Ovall seils chat have slopes of Riverwasl:; some are �� to 20 perce�t Pilch•�ck fzne sar,dy
less than 90 cercent; and some Gre up to 1C percent loam; ard �ome are up �0 15 percert Rriscot, Fuyallup,
�ea�site gracel_y sandy loa�.. ar.d Oridia soils.
3unoff is rapid to very rapid, an� the erosio� ?ermeability is rapid. The effective rooting 3epth is
:�a_ard is severe. oC inche� or more. A seasor,al !�igh water table is at a
T:�is sc_'� i� used for timber. Capabi'_ity depth of 2 to � feet ir_ places. Availa�le water capacity
�n_t :'T_'_e-:: �w.cdlar.d group 3di. is low, and ruacf' is slcw. Stream ove-�lcw is a severe
hazard. The hazard cf er�sicn and deposition by strea�n
overf��ow is moderate �o severe.
__lchu�k Ser:es .his soil -:s nsed for tim:cer and pasture. Capabili�y
ur,it '.'Iw-1; woodlaad group 2s1,
=he Pi_cl-:uck series is made up �f excessivelf
drai�ed sc'_�s th�t formed ir, a'_:uvius nr low s-ream Pilchuck fine sa�dy loair. (Fk! .--This r.early level
terraces, cnde_ a cocer ef hardwecds aad conifers. soil is adjacent tc streams. It is in l�r.g, narrow areas
S:cpes are 0 to :: percent. The anrcai precipitatien is that range fros. 9 to abou� 15D acres ir, size. The surface
35 :� 55 inczes, azd the mean annLa� air tempera�u_:e is layer is fine sar.dy lcam or sandy loam t'iat i� very dark
a�out 50 F. The frost-free season is 160 �o �CO days. grapish broc.� to very dark qray and B to ":9 inches thick.
Elevaticn ranges fror.i 20 to 8�G feet. Thi� soil ;s used for timber and pasture. Caoability
In a representative profile, lal�rs or very dark ur,it I:'x-1; woodland group 2s1.
graf, dark grayisn-brown, ar,d dark-gray fine sar.d and
l�amy `ine saad exter.d to a depth o' abo�t 38 inches.
Below this is b1Gck gravelly sar.d that extends to a Puqet Series
d=ptn ef 60 inches or mcre.
P=lchuck se_ls are used fer pasture an3, to a The Pucet series is nade up of poorly drained soils
Lmited extert, for timber. tY,at fcrmed in ailucitsn, under sedces ar,d grass, in small
de�ressicns of the ri:=er valleys. Slooes
Pilchuck lo�cY fi�e sand (Pc) .--This nearly level
sc_'_ is on terr�ces adjacent to strea�r.s. The areas a-e
lena and narrow and range from 2 to slightly more thar.
50 acres in size. Slcpes are less than 2 percen�.
a=e C _� 1 percert. The ar,nual precip'_tati�r is 35 to mott�_es; streng, very _�_rse, prismatic struc�u_e:
55 inches, and the mean an�ual air temperature is about hard, firm, sticky, plastic; `ew roet�; med:um
SU� F. The fzost-free season is a:out 13C day�. acid; c:ear, smo�th boundary. B tc '_0 in�:es
Elevations range `_rom 1C to 650 feet. �hick.
In a representative prcfile, t'�e soil �s domi- Clg--90 to 95 :nche�, areenish-gray ;SGY 5/1) sil�y ��:ay
nantly :nottled dark c_ayish-browr. and gra-yish-brexr, loam, liqht gray �SY ?/1) drr; comcnon, fine,
silty clay loam �o a depth of about 95 ir,ches. The prominent, streng-brown (?.SYR �;61 mottles;
s.ibstratum is gray silty clay that extends to a depth massive; hard, firm, s�icky, pla�tic; meai:un
of 60 �_nches or :nore. acid; c��ear, sr.,00th bour.dary. 4 to 6 ir.ches
Puget soils are used for row czops ar,d pasture. tricic.
C2c--45 to oC inches, gray (SY Sil) silty clay, light
Puget silty clay loam (Pu).--Puget soils are in aray (SY' 7!il d_ry; feM, medi:un, promi�ent,
r.early round cr elongated tracts that .ance fr�r. � tc yellowish-red f�YR 4;E, 5/Bi mcttles, yellcxisr
-_"�� aczes '_� si�e. Slopes aze :ess than ' percert. browr, (:DYR 5;8i dry; and cemmon, mediwr„
Representative prefile ef Puget siity clay '_oam, in �istinct, lig�� olive-brown (2.SY �!�; mottles,
pasture, 800 feet east of t:�e wes� quarter cerner cf iight }�ei�ekish brown {2.SY 6!9) dry; massive;
sec. 21, :. 25 v., R. 7 E.: very hard, firm, sticky, plastic; medi.un acid.
r��1--0 to ": inch, very dark g:a•;-ish-brown (2.51' �i2; The A ho=izon rarges from silty clay loam tc sil; �
silt loam, grayish b=own (1QYR Si2; dry; mcd- loam. The B horizon is domir.antly silty clat� loa.-n
erate, thin, platy st:ucture; hard, firr.i, stratif:ed wi�h si'_t lcam, silty cla�, and fine sard.
slightly stick.y, sligl:tly plastic, many ro�ts; Scme aieas mapped are up to :0 per�ent '_nclusions of
medi:ur. acid; abrup=, smooth boundary. "� te 2 koodinville and Snchomish soils.
inches thick. Fern.eability is �lcu. The seasonal higl-h water tacle
y12--1 to � i�ches, dark gra•y�sh-browa (2.SY 4/2) silty is at er aear the su:face. Ir. drained areas, roots
c=ay loam, light aray (SY ?/Z1 drv; cc:n.�on, penetrate with d'_fficuity to a depth of 5Q inc?�es or
f_r.e, prcmir.ent, dark-brown ('.SYR 4/9) mettles; more. In undrained areas the effec�ive rcoting dep�h is
moc,erate, very coarse, Pr;smatic structure; restricted. Tne saailabie water capacity is high. Runoff
hard, `ir:n, stic;cy, Flas�ic; many roots; medium '_s slow tc p�nded, and che eresion Fazard is slic�t.
acid; clear, smooth bo�lndazy. 5 to ? inc'�=_s S'ream over`l�u is a secere hazard. �
ttick. This soil is used for row crops and pasture. I
B21g--? to 1? inches, dark grayish-brown (2.SY 4!�i silt•y Capabiii�y un_t IIIw-2; woodland grcup 3w2.
clay loam, iiaht ara•y (,2.5Y 7;2j dry; comnor.,
mediuc, prominen�, strong-crown (?.SYR 5!0, 5i8;
mottles; mcderate, medium, pris�tic strzcture; ?uyallup Ser�es
Y,ard, firm, sticky, plGstic; ccar.y roots; �
I s'_ic:�tly acid; clear, smoot?� bonr.dary. 5 to i2 The Fuya�;up ser_es :s made up o` well-drained soils
inches ttr_ck. that formed _n alluciu.-n, under erass, '�ardwcods, an�
P��g--.� to 25 in�hes, grayish-brown ;2.SY 5/2i conifeis. These se__s are en the natural levees ac�acent
si'_ty clay loam, lig'�t olice aray (SY 6/2) dry; to strear,s in the r-:ver valleys. Slopes are 0 to 2
many, mediur.., prominent, yellowisn-red ;SY� 5/5, percent. The annual precipitation is 35 to EO inches, and
9;'6; mottles; strorq, very coarse, priss.a�ic the ::ean annual air ter.iDerature �s a�ect SO F. Tre
=tru�ture; very hard, firm, sticky, plastic; fros_-`ree seasoa ranees frem 160 to 20G days. Elecation
cmmon roots; slightly ccid; abrupt, smooch ranges from 2C� tc Su� feet.
coundary. 6 to 12 inches t:7ick. _n a represer.tative pro£ile, -rery dark grayis:-�rown
� ;�--_� to 26 1/2 inches, dark-qray (.SY 9/1) mediur. sar.d, ana dar;c grayish-brcwn =ine sandy loar.i and very fine sandy
ligFt grayish brcwn (2.SY 6/2; d_ry; few, medium, loam extend to a de��h of about 39 inches. The
p=ominent, yeilowish-red (5YR 5/81 mottles; scbstrat:un, at a depth of 6D ir.ches or r�ore, is ^ery
=i�ale grain; loose, nonsticxy, nonplastic; few Qar� grayish-browr., dark grayishbroun, and dark-brewn
r�ots; slightly acid; abrupt, smoc�h boundary. 1 medium sand, loam,.� sand, ar.d sand.
to 2 inc?�es thick. Puyall��p soils �re used mostly for :ow creps and
n�4y--�� 1/2 to 31 inches, gra•yish-brown (2.SY Si2j silty pasture. The•y are a•noag the soils that are well suited
clay loa�n, ligY,t gray f5Y ;;2} dry; s,any, to fa�ing. Orban �evelopnent is occurring in :iany
mediinn, proninent, yellowisl:-brewr. (1CYR 3r6; area�.
-�ottles; mederate, nedi��uc;, angular blocky
s-ructure; hard, _'izm, sticky, plastic; few r^uyailup `ine sandy loam (P•;) .—This nearly �ecel
rcots; r..e3i.mi acid; abrupt, wavy boundary. 3 to 6 soil is cn �atural �evees �n tne calley botroms. Areas
inches thick . are long and narrox cr sos:ewhat rou�ded and
.___—=1 tc 40 iaches, crayish-brokn (2.SY �/2) silty
_1Gy loam, light gray ;5Y 7!li dry; co�nor,
f-ne, cromiren-, re'-�c�w, __c��+n_sY.-;•ellok� ,=OYF
, _-� , �n� _�i� _-br_::r_ , .Si= _. _,
Bl-- tc GS in�hes� dGrk crayis:�-brown ;2.`,� ;/2j silt ne�cw �h:s is b_ack muc};y peat ab�ut 10 in�:�es t:i_cL:. Tne
loam, grayisn broun i�.SY Si2? dry; massice; ��s�ra:iur. is dark-gray loa.-ny f�r.e sand that ex�er.ds to a
depth of 6� inches er nore.
sl'_ghtly hard, very friable, slightly sticky, gr.ohomish soils are used fcr row crocs, pasture, and
s__ghtly plastic; mar:z r�ots; mec_�.m� acid: clear,
sr:�oth ioum�arv. 16 �0 2C inches �hick. '�`''
B21g—�5 to 90 inches, dark arayisY-brown (2.SY 9�'2j ��ohoR.ish siit 1c3� (So) .--T�'s ne=rly le•.�el soil is
sil� lcam, light brcwzisn grar (�.SY 6,2i dry; " "
�ar,y, fir.e, distir.ct, dark yelloMish-brown {10YA �n areas ttat are irregular ;r shape and range fro:n 2 .o
9;'=11 metties, £aint 1-:gtt yellowish brcwr. ;2.SY ���ut 900 acres in size.
c'-1i dry; mas�ive; sl:ghtl;� rard, very friable, �epresen=a��ve prefile ef Snohomish silt loam, in
s'�ia:���y sticky, slig:�tly plastic; cammon roets; Fas=ure, 1,050 �eet east and 500 feet sou`h of the
��•=di.un acid; clear, wa«� bourdar_,-. 1� to 18 r�r�hwest corner o: sec. 29, T. 21 N., R. S E.:
_r:�tes tti�k.
— .:) t^ 90 inches, ve n� dark g_ay (�Y 3i1; loam.y �P--C to E inches, very dark grayish-brown (lOYR 3/2)
=�n�, ara•yish brewn (_^.SY Si21 dr_-; cemmon, silt leam, light grayish brown (10YR 6I2) d-y; few,
:r�-dii:m, distinct, dark yellowish-brewn (1GYR 3!9? fine, d_stinct, reL'ewis:7-browr_ i10'tR 510) motties,
c_,ttles; s.ass'_ve; soft, ver•y friab=e, n�nsticky, brcwn_sh yellow ilOYR 6/6'1 dry; moderate, f:ne,
:_nclastic; 'ew rects: slightly acid; clear, waiy qranL=ar structure; slightly hard, friab'e,
��ndary. 3 te 8 inches thick. s=iqhtly sticky, plastic; many rcots; medium acid;
_� --- � 6G inches, eliee-gray ;SY 9i2) silt loam ar.d very �r�spt, smoot'� boundary. 5 to 8 inches thick.
:'_.^.e sandy lo3m, ligh� brcwr.ish ara, (2.SY E;2) hl--E tc 1� _ncl:es, very dark �rayish-brown i=OYR 3/2?
__, common, n.edium, prcn.inent, dark yellowish- silt loam; modErate, fine, granular structure;
_�w�n ;iOYR =;91 *�ottles, yellowis'� browa I1GYR slichtly hard, fria�le, slightly sticky,
_ _) and ligh� yellowis`� brokn l;CYR 5!91 �ry; slichtly plasti�; many roots; medilnn acid;
�ssive; slightly hard, very friable, nonsticky, abrup-, wa:�,� �our.dary. 1 to 3 ir.ches �hic;c.
c-.plas�ic; few roots; slightly a-id. B�4--�1 to 17 i�che�, grayiGh-brow-n (2.SY 5/21 clay loam,
� lignt gray i�.SY 7i2i dry; black (lOYR 2/i; mucky
_'�- � Y,orizer. ranges from da�k. grayish brcwn te cery peat, very dark gray and dark gray ;'_CYR 3i1 and 9/1)
...� . �rayish browr.. The B hcrizcn ranqes from da_k crayish dry; r.�ar.y, _nedit:m, prom_r.en� mottles cf reddish
1:,�•.T ar,d dark qra•y to ver•y dark graJ and c1-:ve gray, Gnd �=own and yellewish red (SYR 9/9 and 5/61, common,
_z_-� silt loam tc ver, :ine sa�dy loar.. In places it fine, prom�nent mottles ef brownish yellcw (":CYR
�tains thir. lenses of fine sand, lcamy sand, anri sandy E;E and Ei'Ei �ry; moderate, medi�.un, granular
>,m. '^he nur.iber and prominenc� cf mottles ir,crease below struc�ure; hard, firm, sticky, plastic; few roots;
� �epth of �D inches. nec'_um acid; abrupt, wavy boundary. 6 to 26 inches
Some areas are up to 15 percer.t in�lusior.s of a deep, thick.
-_atified �dgewick sandy loam; sene are up te S percer.t IIOe--17 to 27 inches, black (lOYR 2/1) moist, mucky peat,
,.� sanay Pilchcck soils; a�d some are up to 5 perce�t cery dark broa•n ;lOYR. 2i21 dry; c�assive; hard, very
ct�� •�2* BellingY;am, Seattle, and Ti.:kwila soils. £riable, r,onsticky, nonplastic; few roots; medi;ur�
Perneability is mederate. The effective rooting acid; abrupt, wavy boundary. 10 to "<5 ir,ches
�ept:� is 60 inches ard more. The seasenal high water thick.
'ab'_e is at a dep�h of 2 to 9 feec. The available water =IICa--2? to 60 inches, loamy fine sand, dark gray (N
._cac�t•y is high. Runoff is s_ew, a.;d the haza�ri of 9!�) moist; gray (5Y 5/11 dry; few, fine,
e-�sion is siicht. 8tream overflow is a moderate hazard. distinct mottles of light brownish gray (2.5`_'
T_�_s soil is use-'. fer row c_o�s ar,d pastcre.
6/2) dry; s,a�sive; scft, very ±riab:e, non-
' sticky, nonplas�ic; few roots; mediw�n acid.
._ac�abil-�t,� cr.it =_v.-1; +.:•-:o,�;ar: y_o��� �'�=i. .
The A horizoa rar.ges fros. very dark grayish brown to
�= d3=k bro-m. Th= B horizon ranaes from very dark grayish
s� r„�:-,� �r_c=
y � - brown to gray ard from silt loam to silty c�_ay lcan and
--�'--�.,
,he �:�ol-:��isr ser_es is r,,ade up of pucrly dra=nen s�ils lcamy sand. Depth to layers of peaty material rance� from
ttat fcrrec in ailuviwn in streair. valleys. S'epes are C 13 to 36 inches. The peatf layers are black tc red�ish
t� � percent. Anr.ual precipitation is 35 te 50 inches, black ar.d are 10 inc�es or more thick. �ayers ef si1�y
ar.d t�e mean ar.r.ual air temperatnre is abcut `_C� F. The clay loam to l�amy sand occsr wi�hin and beiow the peaty
'rost-free season rar,aes from. 140 to 2��C days. layers.
: t Some areas are up -0 2C percent included Woodinville
�_�vation ranges from abeut sea =evei :c 300 ee... soils; and some are up to 5 percent Seattle, Tuxwila,
In a representative pro�ile, the surface layer and Shalcar scils.
and subsoil are very dark grayish-brcwn and gra.�ish
broan si'_� loam and c_ay loar� abcut 17 ir_ches t�icx. Permeability is mcderate in the upper part ef the
prcfiie ar.d mederately rapid in t:�e lower part. There is a
seasonal hiyh water tab:e at or near the surface. In
drained areas, the effectice rooting depth is o'0
_re1'.es _r r.�r:. I: cr.d_a-ced areas� -�ot_rq dect� _., ..Ca--'-� tc r.� i:��_:�e�, .-a�;: i�'ir _._. nuc:�„ ��lac}, ;5'i�
restr�cted. 'r.cai:able a�;er ca�ac-_t:Y is �igh. ?.c:eff 2ii) dr:; mode=ate, eery coarse, prismatic
is slow, and the erosion hazard is sligtt. Stream struct�re; slichtly hard, very friabie, nonstici:_;,
overflo•a _� a severe hazarc. nonp:astic; few roots; very strongly acid. Severa=
This seil is usec for row crops, pasture, and feet th=ck.
hay. Capability unit IIw-2; uoodland croup 3w2.
The minerai layers above the muck rance fron. t�ery da_k
brown to ver1 dark grayish brown. The lcwer part of the
Snohomis': Series, Thick Surface Variant minera_ layer coimnonly ranges from light browa�.sh gra�
to very dark browr,. Layers o� cery fine s�ndy
Snehonisr series, thick sur`ace •rariar.t, is made up '_�am vol�anic ash co:rcncniy occur ir. the iower half ef ;.�
..* somewhat pocrly drained �oils that fo=med in alluvial R,ineral layer. The depth to muck rarges from 20 to 9G
aeposits of diatomaceous mate:ial on the flood plain of in�hes.
tre Sammar.�,sh Valley. Slopes are 0 to 2 per�ent. The Soi�s ir.cludea with this scil ir, mapping make up r._
ann�al pre�=pitaticn is 95 to 5G ir.ches, and the mean more than 25 percent ef the total acreage. Some are�s
annual ai= =emperature is about 50� F. The frost-`ree are up �c 25 percent the cery deep Earlmoat silt =o�r.;
season is about 2GD 3ays. Elevation ranges from �cut sea and some are up to 15 percer.t the very ueep -nkwi-a
lecel tc 4C feet. muck.
Ir, a representative profile, the sur�ace '_aser is very Fermeabili=y is mcdeiate. There is a seasonal 'r._:
dark brown silt _oair. about 1G inc7es thick. The next water table at a depth of 2 to � feet. In drained area�,
layers are very dark grayish-brown and lightgray s=1t the effective rooting depth ;s 50 ir_ches or more.
leam ar.d cery fine sandy loam about 19 inches �hick. Available water capacity is nigh. Runoff is cery �lcw,
Below this is black muck that extends to a depth of EC and the erosior: haza_d is slight. T:�is soil i� subjec� -_
iaches or more. xcasicnal flooding.
These scils are useri for row crops, hay, cr pasture. Th:s soil is csed fo_ r�w cro���, pasture, ar.d
hay. Capability uri- I:w-Z; �.ac,:dlanv giour 34:=.
Sr,ohomish si'_t loam, thick surface variant (Sr; .--
This so�l _s nearly level. 'r.=eas �-e irre��lar ir. shape
and raage fron 1 acre tc near'_y �GC acres ir. size. :-ar 5 :�s
Renresen_ative crofile of cultivated Snohomish silt
loarr., Q20 `eet north and 250 `eet east o` the west The Sultan se-ies _s madz up o� r.�ederate;; �a=_'_'_
qua_ter corner of sec. 26, T. 26 td., R. 5 E.: drained scils that fenned ir. alluvii:m, �,uider gra�� a-.d
hardwoods, ir. the maior stream valieys. Slopes are
Ao--C =0 10 inches, very darx brown ;%.SIR 2iZj silt 2 percent. The Ganual precinitation is 35 te S��i :r..i:=,,
laam, grayish �rcur. (1CYR 5;�) dry; weak, fine and the mean arnual air tempera:ure is about SC . . -..-
and coarse, crucr� struc�ure; soft, �:e_y friable, frost-free seasen ranqes from 150 �0 200 da.
ner.sticky, slia:�tly plast:c; coR¢non roots; Elevaticn ranges fzom abeut sea level to 85 feet.
sl_ghtly acic; ab-�Ft, wavy bour.�arf. 1� to 12 In a represeatative profile, the surface 1a1=: :-
inches th'_ck. dark grayish-browr. silt lcam about ° inches t�,_c.,.
C1--lb to 18 iaches, very dark grayish-browr. (l0Y'R 3/2) ��soi'� ex:ends to a depth o' EO '_rc:ties or mcre. �- _
ar.d brow� llOYR. �/3i silt icar.., �:cht cray (_.SY �ottled yellowish-crowr., light olivebrown, gra_-_s}-:-t_ ... ,
,/21 dry; few, fine, prominent ;iOYR 7/o and oi81 and olive-gray, stratified silty clay loam, silt - ::r,
n.ctties in root casts; moderate, very coarse, very Fine sandy loa�, ar.d mediur.� sand.
p_ismatic structure; hard, friable, sligh�ly Sultar. soils are used for row creps an9 pastL_
sticky, slightly p�astic; commor. roots; s�e�i�.mi
acid; abrupt, wavy boundary. 4 te 12 inches Sultan silt loam (Sui .—This gen�l•y .uidula=i:.,: �__
t'�ick. is on bottom land. Slopes are �_ess than 2 perceat. r�ea�
IIC2--18 to 2G inches, light-gray {lOYR ?/2) ar.d dark are irregular ir, sha�e ar.d rang< fros, 2 to aiect �CO
yellewi�Y.-brown (1QYR 4i9) cery fine sar.dy �_oam acres in size.
(volcanic ashj, write (10�R 8/1? and very pale Representative prof-:le ef Sultaa silt loam, �n
brown (iOYR 7/9) dry; massive; slic�tly hard, pasture, 500 feet east, 250 feet east and 25�� feet
i friable, r.oasticky, nonplastic; commoa roets; north of the south quarter corner ef sec. °, T. 2� `7.,
slightly acid; abrupt, wacy boundary. 3/9 incn to 2 R. 7 E.:
irc?�es thick.
IIIC3--20 to 29 inches, very dark grayish-broxn Ap-0 to 9 inches, very dark gra,�ish-brown (-_OY3 3;�1
!lOYR 3;2) and ligl:t brownish-gray (1CYR 612) silt silt loam, liant brownish gray (1CYR 6/�i dry;
loam, light brownish gray (1QYk o/21 and very pale mc�erate, me�.ium, granular structure; hard, �i�n,
brewn (lOYR '/91 dry; mcderate, very coarse, sticky, and plastic; many roots; sligYtly acid;
prisnatic structure that parts tc very cearse platy abrupt, scnooth bo�uidarr. 6 to 1G inches thick.
s;ructcre; sl-:ghtly hard, friawle, r.or.sticky, 821--5 to 2'� ;nches, yellcw_sh-brown (lOYR 5/9) si_ty
sligh�;y plastic; few rcots; mediuir ac_ri; clear, clay loam, pale brown (;OYR 6/3; dry; modera*e,
smoot� boundary. S to 19 inches f_r.e, s,abaraular blocky structure:
APPENDIX E
Geotechnical Engineering Studies
E-1 ............. Prepared by Atlas Geotechnical
Engineering, Inc., April 1985
E-2 ............. Prepared by Terra Associates, Inc.,
November 16, 2006
E-3 .............Addendum by Terra Associates, Inc.
February 22, 2007
REPORT dF SUPPLEMENTAL INVESTIGATION ,
PROPOSEb k�AREHOUSE/OFFICE BUILCING SITE
LIND AVENUE, RENTOh , WASHINGTOv
Apr-� 15 , 1985 - ,
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ATLAS .�EOTECHNICAL ENGINEERING INC.
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� �] o;��;a ,�TL�,S �E�TEGF�f�IGAL �NGINEERIN� IN�.
� �� 13125 - 113TH PL:+CE 'J �.. KIRKLAND, tNASHfNGTON 9803d TEL (206) 823-1030
,�prii 15, 1985
�Io�;J�y��a �Z'��� i�';�i`��n S�_•�1�ig
3GCy ;ZO�cE� ,'.,,.«•���e PdE
i;� �i���ti2, �1,4 :0�O5
a�_'����21?l��i:
2�pori: of Supp�em���tai If�vest7gation -
Pt�o�osed ��lar�house/Office Buiiding Site
Lincl {Ivenue, Renton, 4tashington
I�!�P,ODUCTIOP;:
This lett2r rep�rt surnm�rizes the results ef our geotechnical investiya-
�tion of your proposed warehouse and office building site on Lind Avenue in
Renton, itashington. Our �,�ork was undertaken in a.ccordance with our confirma-
tion of agreement dated �•1arch 25, 19�5 which you confirmed in our service
agreement on the 2�th of f9arch.
_. The site measures approxima�e,.ly 880' ;t 57_.C'. Por�i�ns of the adjacent
streets rights of way io the south and east may _be added_ to the property which
ti��ould increas� its size someV�hat. The pro�erty outline and the acijacent
streets are indicated on P7ate 1, "Exploration Locations", attached to this
report.
The site is a filled former marsh land and is now nearly level with the
exception that some of the adjacent former street rights of way are at lower
1 eve 1 s. The si te i s no�v vacant except that sonie trees and brush have grown up
over the si te. -
Tnere is a previcus investigation of the site made by the undersigned and
summari zed i n a report dated �;arch 15, 1968. The si te was fi 1 1 ed i n 1963 for
use as a petrol eum produc�s tanl: farm. This fi 1 1 ing was done in accordance
with the recommendaticns of the investigation report, as confirmed by
engineering inspection and testing of the fi11 described in a report dated
October 25, 1968,
The proposed constructi�n consists of 4 "L" shaped steel frame buildings
with lightweight wall paneiing. Slab on grade floors wou?d be used and the
floors would be supported on a fili approximately 2' above the site grade,
Shallow depressions would be provided adjacent to portions of the building to
a 7 1 ow truck dock hei ght 1 oadi ng. The warehouses vroul d have an approximatel y
24' i nteri or c 1 ear hei ght and ar� 80' c 1 ear span. At some future date the
1
�ui 1 dir�gs ��rou7 d �ae co��v�r'ced For of��ce use by add e��a an �i i�ice�nal s2corid story '
suppor�ted a�t �the exterior� a�a11 1 i,�es and on inter�iof� beariny ►�al 1 s and/or �
c;uiumns , Elevators ti,�ould 'oe added ru�^ access to �t�ie s`cotid floor levei.
Eu� i d i��g co i un�r�� r��oul d be ' oca ted abcut 25' c�� c������rs, CU� Ulill1 1 eads
�re� ll b� z,i��u� 2� kit�s d�ad l��ad and 25 ;;ins ? iv� load� ss�teriur and ext�rior
t„r�l 1 1 f,ads a-s'�r`�r �f Fi c� ;.Jt1V"'Sl n41 �Jo�,�?d �e ai�out i 500 ;bs ��er foo�: c�cad 1 oad;
E�f1c� �1>�� #��S �3��!' TJi?i: �"�JC� IOit�, 1'v�dY'C,IIOLf$t'. S'I,uP'd��? �c�?��S i3�"? E'Sl'I+IId'e:t't� i3O YIOL
L.:Ci?2:7 ,-i�nEJ'C ��U � f)� �-t'� S(�� f';,o itYlfl C7Yl�''��'k"P11� 37 � � r��_� ' ? )'„
S :. S;) "L� '�t� c�Fl2�"7� . Ylt �
rir�re ���af� au��n.��c '�t) 1Us p�� ��a, xi� '
Tne i o��n�et� ira►�s{i 1 and �r��i �aci�d so���c at�d cc�;npress?�i �. pe��t an�i r,��gan ��;.
5�i l i denosi��s u�� ��� ai�out �3' ti�i cl: wE�-i ch t-J2Y'2 uf�c��r 1 a i�� hy �es5 co��nr�ss i;���
sil �ty sands and s� 1tso The �najo+� coi�cern of ti�is invesi:iga�tion �s zo �valua�t�
�he thickr�ess and condition of -�hese deposi�is and to 2s�tinate s2ttlei��ent and
differ2nt�ial se-�tlement be�iav�oE� �that would afrect i,he ne+,r constti�uc�ior�.
Tfd1�ES�IGATIOPd:
Ttivel v2 test �its, located as shoaJi� on ?iate �, were excavatzd usiny a I
1 arge tractor mounted backhoe. The test pi ts were dug to depths of u{� to 18' ,
and bull< oi� dis�urued sai�ples r�epresentative or th� materials, particularly I
ti�e com�ressii�le materials, were obtained for moisture content determinations !
to ai d compari sons ���i t�� the testi ng done i n tfie pre vi ous i n vesti ga ti or,. A 1 og ,
of the soils encountered was I:ept and is presented in typewritten form on
Plates 2 through 10.
One additional test pit was excavated near the southeastern corner of a
small parcel also under your otimership located just east of the northeastern
corner of the property. The 1 og i s presented on P 1 ate 10,
Initially a pattern of 14 test pit explarations, located �,�ith respect to
the proposed bui 1 di ngs and ti�ei r 1 ocati ons, was pi anned, i est pi t excavati ons
do disturb the foundation soils, and there is a possibility of adding portions -
of the adjacent street rights of way and relocating the buildings somewhat, or
of an a 1 ternati ve bui 1 di na arrangement. ?fierefore, we were asl:etl to l ocate the
test pits along the east-west center line of the site and along the north and
south property 1 i nes as far from the bui 1 di ngs as practi cal . The test pi t �
locations were established in the field with your assistance using a steel �,
tap.e to establish distances eastti��ard of the curb on Linc Avenue and along !�
alignments established using a level with a degree scale for turning anales. I
The locations are shown on Plate I. �I
1�le cauti on that there ar�e a nur:iber of was�s i n whi ch errors can 5e made i n �I
field locating test pits. If future construction is planned which approaches i
the i ndi cated test pi t 1 ocations a�i thi n 20' we recommend that ther� be very
thorough probing and checkina of building foundations to confirm that they are
not overl yi ng test pi ts.
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COtJCLUSIONS A�D RECOM��IENDATIONS
GEtdERAL In nearly all of the test pits the fill appeared to consist oT
t�•ro layers. The uppermost layer is a brown sandy and gravelly silt including
some rock fragments. The gravei is pricnarily ancular material and the fill
apparentl y was �eri ved pri nci pa 1 1 y from stri ppin, to expose rock i t� a rocf:
quarry. Rock up �to about 200 lbs in size was encountered in our tes�t pits.
Some 1 arger •roc�<s are 1 i kel y. !oca 1 1 y �the fi 1 1 i ncl udes a brown sand From an
unknown source.
The lower portion of the -ri I 1 i s general 7y bl ue or b7 ue-gray in col or and
appears to be from the same source as the upper fill except that the rock
content and �cf�eir size is greater. The rock content increased with depth. In
two of the test pits the lower portions of the fili consisted almost entirely
of rocks, including rocks of up to 800 lb. size with dimensions of 2 to 2 1/2
feet.
Total fi71 thicknesses varied from 6 1/2' to 10 1/2' generally being the
thinnest near the southern boundary of the site and thicker towards the middle
and northern boundary of the si te. The fi 1 1 i s dense except that the fi 1 1
surface has been disturbed to depths of 6 to 1�" as a result of traffic on the
site, t�reathering, and to some extent by the roots of vegetation that has
sprung up on the si te.
Beneath the fill there is a compressible former marsfi deposit including
peat, si 1 ty peat, and i nterl ayered peat and organi c si 1 t. The marsh deposi ts
, vary from modera tely soft to soft, are saturated, and vary from 1 1/2 to 7
1/2' thick, generally being thinnest on the south and thicker and with a
higher proportion of arganic materia� towards the north. It appears that
ri or to fi 1 1 i n the si te-was-Ni- 11et� a 1 on the southern boundar The marsh -
P 9, 9 -- 9 y.
deposits are thi�iner there, and at some time in the past they 1 ikely were
exposed to drying vrhich could significantly reduce their canpressibility.
The marsh deposits are underlain by sands, silty sands, silt and occas- -
sionally by organic silts rrhich extend to depths of at least 85' as indicated
by the explorations done previously. These materials are only slightly com-
pressible compared to the marsh deposits.
Although the data obtained from the recent and previous investigations
are somewhat limited, they do indicate a somewhat regular variation from least
compressible in the south becoming more compressible in the northerly direc-
tion. There was some fine gravel found in test pit 10 near the northwestern
corner of the site. It is reasonable to believe that there may have been some
stream activity which accounts for the fine gravel and which may significantly
alter the soil profile and compressibility locally.
You have provided a sketch prepared by a utility contractor showing that
a ditch was dug near the western boundary of the property. The sketcn indi-
cates that the ditch lies entirely within the 60 foot wide building set back
required along Lind Avenue. We caution that such sketches tend to be self
serving, inaccurate and do not reflect disturbance of the adjacent ground by
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side slopes or cavi�g. �le expect that a portion of ihe ground within the
pianned building areas may have been disturbed by this ditch 2;<cavation.
Warning signs and other evidence indicates ti�at there are bur�ied power lines,
a �ater l ine, a petroleum Nrod���ts -1�ne and sew2r ar,d a�ater 7ine stubs on the
prcperty rear Lind ave^ue. Trere also are two petroleum prodGcts l �nes ja�st
south �.f the site anC yc!! ���re ad+rised tnat L��re is a 60 incn City of Seatt�ie
aQuedu:,t i� th2 sout?� hal ` �f the 23rd Street right o� way.
i
Ther�e may be cther �_�ii ' ities un or a3jac�nt ... t:^e �i��; �•,e d��j ^ct
attempt io locate or i�ent� Fy a' 1 or" ti�p ��tiliti2s. ,
'2st pit excavations wer2 ��ot left �pen lcng enougr �o allow grcund water I
i 1 eve7 s to stab� 1 �ze. Ho�4��ver, based on coi or chanaes ai�d the ccndi t;on�
! observ�d in �he fi 11 we ex�ect t"at ground w�t;.r lev�l s have been about 2 �./2'
below tt�e surface in inter�or pertions of the fill slcping dok�nward to depths
of ar:��ut 5 feet tc�.�ares t�� ';�,er �rc;:nd as,.d �rair,c,e di �.:t�e� adiacer` to t�e
si t�.
, txcept fcr Lind Avenue, ��r��icn is conplete, tt�z s�ree� �icht of ways
adjacent to the property are below the site grade. Taylar Avenue on the east
and 23rd Street on the soutn are s+gnificantly helow �he s�ce grad� ar,d act as
drai nage way s.
SETTLEMENT oENA,V'?OR: �ettieme�t due to cemFr�ession of the soils under
the weight of the fill placed in 1968 should be essentially complete. There
will be new settiement related to char�ges in site grade and fill placed for
the building pads and also relatzd to building and storage loads.
There wi l l -be -va�ia-ti-0ns in settl ement whi�h wi l l tend to accur- -as - - - __-
differential settlements which could cause distortien and damage to the
buildings. These variations will be re'ated to variations in the soil condi-
tions or building storage loads, Locally s2ttlements couid be significantly
i es s i f porti ons of the marsh deposi ts experi enced dry�ng i n the past. Thi s
variable cannot be satisfacto�iiy evaluated based on test pits or even with
careful samp� ing ard testing. We cannot know soil conditions beyond the
information develotied in our explorations nor can we know the possible varia-
tions in war�house 5torage loads. However,—our experience indicates that
these variations should not be major and are not likely to result in noticable
differential settlement or damage to the buildings. Thus, it is our opinion
that i t woul d not be economical to prel oad the si te or to make other than
minor provisions to minimize the damage that may occur due to differential
s2tt7 ement. I t appears more economi cal to accept the ri sk and to repai r th�e
damage if it occurs than to bear the cost of reducing that risk.
There are three low cost construction provisions that we recommend that
should reduce the potential for damage or reduce the cost of repair. These
are 1) providing extra long anchor bolts at column locations so that coiumns
coul d be rai sed and shir�med i f indi vidual col umns settl e out of 1 i ne, 2)
Providing accQss to cross bracing between colum�s and building frames so that
these may be adjusted if necessary, and 3} at th� junctions between the
eler�en�s of each °�" s'raped Cuildinc, providing ccnstruc+ien jcints of ever-
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la�p�ng s;ding or �paces lilled ��ith a mas�ic or plastir ;;�aterial .
!Je have anaiyzed s2ttlement for thre� cases: 1'r a 2' thick�`�s of f; l l
and concrete floor slab i� build�rzg areas, 21 column loads of 25 ki�s, and 3)
storage loads averaging �50 lbs p�±- sq, f+. The :?nticipated range ofi szttle-
�znt and d�ffer���ial seiile��r,t in inches `or �ach of tr�e thr•ee ccndi;,ior,s
and each of tne four quadran:s c�F the site are as f�11aa!s:
hu9�dina pad `cui?di,�g starag� load
rana� uir;, ranUe �jiff, rang2 :iiff.
Souih�,est �-3 2 i12-2 � 2/Z 0-1 li2 1 1!'.'_
Sout;�east 1-3 2 1!2-2 ' 1/2 0-1!2 1 1/2
��orthwest 2-5 3 1-3 2 0-2 2
tJcrtheast 2-5 3 1 1%2-3 1 1/2 0-2 2
Settlements a•re additives, ho4�ever, a substanrial portion, �erhaps one
;ialf, of the building �ad settlement will occur during construction and will
not bp noticed in the buildings. Settlements will occur fairly quickly a�d
shou'd be about half or two-thirds complete in 2 months.
1�e expect that settl2ments wiil be least along the souThern boundary of
ttie propert� increasi ng somewhat uni forml y i n the northerl y di rec�i on. Thus,
the variatiorr in settiement should tend to result in a tilt of the buildings
rather than damaging distortion of the buildings. The tilt w911 be relatively
minor and normally would not be noticed.
FOUNDATION SU�PORT: Either a coFltinuous strip type of foundation rein-
forced to support concentrated column lcads, or column foundatiors connected
with wall footings founded on dense existing fiil should be satisfactory. In
either case we recommend that steel be provided at the top and bottom of the
continuous or wall footing to develop the maximum bending strength of the
cencrete. _
We understand that the buildzng frames will be tied together from side to
side through the floer sTab to deal with thrust develop2d-at the foundation
level by the building frames. —
Foundations should be supported on dense fill and may be designed based
on a beari ng pressure of 3,000 1 bs per sq. ft. for col umn footi ngs wi th a
minimum dimension of 3', and 2,000 lbs per sq. ft. for wall footings with a
minimum dimension of 16". Ex'�erior footings should bottem 3t least 18" below
, grade except that footings depressed for truck dock height loading need be
only 12" below the aGjacent grade. Interior footings for future interior
office bearing walls may be tFickened sections ef the concrete fleor slab or
strip footings bottomed at least 12" belflw the top of the slab.
Footing excavations should be made using equipment with smeoth buckets.
Tee th that would disturb soil below the excavation should not �e used. Any
soft soil or soil disturbed by the excavation equipment should be removed and
the thickness of the footing increased to make up for over excavation,
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',�herever bui 1 di ng founda�i ons a;prca�n ���i th�r. 20' of i ndi ca�ee expl cra-
tion locations, particular ca�e should be taken to confirm that the soils in
the footing area ha��e not been disturbed by the test pits.
Footing excavations should be inspected by a qual � Fied g���echnical
ergineer to confirm that the soil upon which the �ootings will bear• is dense.
SITE PREPI{RATIOfJ: I�Je reconir�end that th� lecation and depths of al ] the
ui;ilities ati�d pipelines be deter�ined befure you establish building locations
or- begin site work.
The site is very nearly flat and is not sloped sufficiently for drainage.
As a result there are a number of ponds, particular7y in the central portion
of the si te. The ponds are shal 1 or�, apprcximatel y 6" or so deep, ho4rever they
will interfere with the construction work and with necessary recempaction of
the upper porti on of the fi 1 1 . 4Je expect that the ponds wi l 1 dry rapidl y
during dry weather. The easiestway to get rid of these ponds is to wait for
dry weather which normally prevails fram May thr�ugh September.
If it is necessary to do the work before the pends dry, �hey could be
ditcl-ed and drained to local sumps and the ��ater pumped to a storm drain
system. It will be necessary to very finely slope ditches by hand to get the
U�ater to the-sumps. It would not be practical to ditch to drain the ponds to '
the edges of the si te.
For the existing fill area,we recommend the following procedures prior to
beginning construction work; First, the ponds should be drained or a7lowed to
dry out. Second, the vegetation should be pushed over so that the majority of
the roots are removed and the vegetation should then be raked up and disposed
of off site. Then, just prior to placing new fil l or pavement courses, the
fill should be conditioned either by allowing it to dry or by sprinkling and
harrowing to obtain a moisture content suitable for compaction and then com- -
pacted wi th heavy rol l ers to obtai n a densi ty of at 1 east 95� of the maximum
dry density as determined by the ASTM D 1557 compaction procedure.
Trees have grown significantly larger on the south edge of the fill and
in the unfilled areas of 23rd Street. Portions of Lhe original marsh and of
the compressible soils that made up that marsh are exposed in this area. It
probably will not be possible to operate equipment satisfactorily there. We
recommend that the trees 1 arger than 4" i n di ameter be removed ei ther wi th
dragl i ne equi pment or wi th cabi es. The remai ni ng vegetati on can simpl y be
pushed flat ahead of fill placemen� We recommend that the initial lift of
fill in this area be a minimum of 2' thick or thicker as required to keep the
upper 1 ll2' of fill above water levels. The initial lift of fill should be a
coarse free draining material , either a rocky fill , sand and gravel , or mixes
of these materials. This initial fill lift should be compacted from its
surface as far as practical with fill placement and hauling equipment. Except
as noted for roadway areas, succeeding layers of fill should be placed in
layers no more than II" thick, conditioned to a moisture content suitable for
compaction and compacted to 95A of the maximum density.
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The City of Seattle aqueduct is about 15 feet from the north ha] f of the
23rd Street right of way, lJe do not kno��� how tf�is aqueduct is supported.
Fi 1 1 i nc the north hal f of the r�ight uf a�ay to the 1 evel of the exi sti ng fi 1 1
should not damage the aqueduct, horrever as a precaution to minimi�e the •risl:
of damaye we recommend that f�i11 placement and compaction proceed in a dir�c-
ti on para 1 1 el to the aqueduct.
l�'e �•�ould ae glad to further analyze tf�e effects of this preject on the
ac;ueCuct, but rnore inforration on the aqueduct would be necessary.
Si i�ce fi 1 1 i n ihe street areas adjacent to the exi sti ng fi 1 1 �ai 1 1 be over
areas th�t have not previously experienced fili weight, substantially more
settl ement wi 1 1 occur i n these areas than wi thi n the exi sti ng fi 1 1 area. l�le
estirnate that along 23rd Street, as much as I 1/2' of settlement could eccur,
which would leave a dip in roadways that cross this area. We believe that it
would be best to fill the area now and if you wish, to overfill by approxi-
mately 8". We expect that within a few months time about half of the settle- '�
ment will have occurred and that the area could then be leveled. I
Some settlementtivill probabiy continue in the now unfilled section of II
23rd Street where it may be necessary to redo driveways or roadways crossing
thi s area i n 3 or 4 years.
Any cl ean soi 7 material shoul d be sui tabl e for use as fi 1 1 except for� the
i ni tia 1 1 i ft i n 23rd S treet and the fi na 1 12" i n , roadway areas. I n roadways
the upper foot of new fill should be a material approved by a qualified
geoteehnical engineer and with a CBR value of at least to provide better
support for the roadways and to approximately conform with the fill. Also the
final 4" of fill in building pads should be capillary break material as
described in this section on SI.AB ON GRADE FLOORS.
U1�ILITY COPdSTRUCTIOv: The existing fill contains a significant number of
rocks that could be difficult for small backhoes to excavate. Also, the rocks
can provide uneven support for utilities and some care will be necessary to
properly bed and support utilities in this fill. We expect that for trenches
up to about 2` deep relatively few rocks will be encountered, however below 2'
increasing percentages of and sizes of rocks will be found. At depths of more
than about 6' rock _pockets should be expected. 8elow the fill a mat of
vegetatior and soft cor�pressi bi e peat and organic si 1 t soi 1 s �ri 1 1 be encoun-
tered.
uround ��ater levels will be high and severe caving should be expected in
some sections of utility trenches particularly in trenches more than 4' deep.
For trenches more than 4' deep we recommend that the contractor pl an on
shoring and dewatering. Dewatering may be accompiished by a variety of
methods. Perhaps the most practi ca 1 wou 1 d be to di g sha i 1 ow pi ts near the
trench alignment and use sump pumps to pump the water down, tdater flows may
be very heavy,
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Shoring will be necessary for the safety of personnel working in ,
tr-enches more than 4' deep.
There is a possibility th«t methane gas or petroleum product fumes will I
be found. It is also pcssible that the �renches will fill with gas excluding I
oxygen. Al i of thes2 conditions can be i�azardous and potential ly lethal tc
worlcmen. b!e recerrnnend that a check for methane or other hydrocarbons be i�a�e
i►i newly :xcavated trenciies. Trenches should be tl�oroughly veniilateci �efore
wo���cmen eriter.
Qeddi ng for uti 1 �i ties ��i 1 i be very important because rock in the f? I I
wi 1 1 1 ikely resul t in uneven support for uti 1 i ties. For sewers or otf-�er�
settlei7ent sensitive utilities we recommend that the trench should be ever
excavated by 18" and that 18" of pipe bedding be provided. Elsewliere 6" oT
bedding should be sufficient. The beddina should be a medium size grav: l
tamped in place and shaped to conform to the invert of the utility.
For sewers or uti 1 ities at depths that would extend through or nearly
through the fill , we expect that there may be difficulty with trench bottom
i nstabi 1 i ty. If any uti 1 i ties wi 1 1 require excavati on wi thi n 18" of ttae
bottom of the fi 1 1 we recommend that shori ng or 1 aggi ng be pl aced prior to
excavati ng more than wi thi n I8" of the bottom of tP�e fi i 1 . Thi s shori ng or
lagging should extend through the compressible zone and into the sand or silt
benea�th. Jacks and lagginy should be provided to support tfie trench sides.
Locally rocks will interfiere with placing lagging. In these areas the rocks
will have to be dug out first. Only short sections, not more than 5 or 6
feet, of trench should be unsupported where the trenches penetrate the fili.
- f+lanh�les also repr•esent a significant settlerr�ent and differential settle-
ment problem. To the extent possible we recommend thatyou avoid manholes.
However if manholes are necessary they should be designed and constructed so
that as far as possible they have the same kind of foundation support as the
uti 1 i ti es they servi ce. I t i s not necessary that manhol es be supported on
pi les or that they extend through the soft compressible soi 1 s. Instead, we
recommend that the manholes not be built more than 6' above their inverts
before beginning backfilling. Backfilling of the manholes and of adjacent
utilities should continue as the manhole is constructed so that there is never
more than approximately 4' of manhole projectine above backfill. Otherwise,
the manhole structure beari n4 on ex�osed soft sei 1 can caus� fai 1 ure cf the
soft underlying soil.
ELEVATOR SHAFT: �Je anti ci pate that a pneur�ati c type 1 i ft wi 1 1 Ce used
for elevators. The piston would require a 14 to 16' deep well or shaft below
the elevator. Water, rocks, soft soil and caving is likely to be encountered
in excavating these shafts. We expect that a casing will be necessary to
advance the shaft.
There is low head room equipment available to drill and place such casing
from inside of buildings with a 24' clearance. However these drills are
expensive compared to simply digging a pit with a backhoe. There appear to be
a number of a 1 ternati ves i ncl udi ng 1 ocati rg the el evators or: t'�e outsi de of
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the building where conventional dril ling equipnent could be used, 2) pr2-
�lacing casing in the buildings now, 3) drilling and placing the casings from
inside of the building, and finally excavation inside of the building using a
backhoe. Some discussions with elevator installers may �e useful in antici-
�,ating their requir2ments and selecting the least costly alternative.
PAVE��1�NT DESIGU: 's�le zs timate that the C8R val ue of the exi sting fi l l s is
Pav2rnent design may be �ased on this value.
It is common practice to underdesign pavements or to design them based on
a snor-t s2rvice life. Areas of r�igh traffi� .or hQavy 1��_a) �r.affic loads or
�•if�ere there are locally unfavorable soil cr water conditions will fail prema-
turel y, However, the cost of repai ri ng premature fai l ures i s usua l l y l ess
tiian the cost of more conservative pave�nent design.
Typical pavesnent sections for areas subject only to light passenger
vehicle traffic would be 4" of crushed rock base with a 1 1/2" thick asphaltic
concrete surfacing. For areas subject to truck traffic we recommend a minimum
of 20" oT crushed rock base course and 2 1/2" of asphaltic concrete surfacing.
Synthetic filter fabr9cs do not appear to be useful on this site. Also
asphaltic treated base course does not appear to offer any special advantage
for this site.
Pavement subgrade should be reconditioned to the proper moisture content
for compaction and recompacted to 95� of the maximum density immediately prior
to placing pavement base courses.
Subsurfa�e drainage of the subgrade is important. We -recommend that
catch basins be perforated near their bottoms so that water, which v�ill
accumulate in pavement subgrades, can drain away. Catch basins should be back
filled with filter rock or with drain rock wrapped in fi7ter fabric.
It is important to minimize the entry of surface water into the pavement
subgrade. Cracks that may develop should be sealed periodical ly. During
construction, care should be taken to assure that the pavement adjacent to
catch basins is slightly above the lip of the catch basin and that cracks that
develop there are kept sealed. Otherwise during rains and the frequent long
i nterva 1 s of wet, mi sty condi ti ons so common i n thi s area, water wi 1 1 drai n
across the pavements and instead of flowing into the catch basins will drain
into the subgrade.
Pavement design is a complex subject involving expected traffic loads,
desired levels of maintenance, the desired life of the roadway, and cost
considerations. If you wish we would be glad to work with you or your
designer to develop a pavement section that is appropriate for this project.
Some consideration should be given to the timing of pavement placement as
campared to comp 1 eti on of bui i di ng constructi on. Pa vi ng i s often deferred
until after building construction is complete so that it will not be damaged
by the construction acti vi ty or crane 1 oads. 1�Je recommend ei ther that the
9
pavement be compie�ed before construc tion is 5egun or that all of the pavement
and sel �ct subgrade placement ;�e def�rred until after ccnstructien of the
build�ngs is complete. Canstruction traT��c on select �ubgrade or base
courses should no� be allowed.
�Ih?ITATI�NS AND ;,QulTI�";AL SER�l�C�5
Y'au sho��! d be aaaare �hat s�.ibsurface cor�ui ti ons cari, and ert2r do,��ary
between exp3o�ation loca�ions anc with time.. ? n ad� ition, unanti;.�pated
condi t�ons thaz cannot be fu l 1 y eva l ua teu by a f_w expl e�at�i ons may be en.our-
tered during construction. �nerefor2, r�e re��cr�me^d t��az a cont;ng2ncy be
included in your canstruction budget and schedule to allow for tnes2 ever,-
tualities.
This report is �repar2d f�r use by you and your design i2�m. The data
and reoort should be prorided to ccnstructicn cantrac [ors �or tneir SiGdirg or
estinatiny, but net as a warran�y of the subsurfac2 c�rditiors. We cannot be
responsible for the interpretation by others of the inforr�ation 3n this
report.
Tf the pl ans are revised, or of other parties wi 11 b+.�i 1 d on or devel op
the si te, wz sho�ll� be consul ted.
We reccmrrend that you retain us to review the geotechnical aspects of the
final plans and specification to see that they meet the intent of our recom-
mendat�ons. For continuity ar�d because of the potentially troublesome soil
conditions, we recormend that we be consulted Quring the site preparation and _
-gradin9 war.k or utility -c.onstru.ction. _ . _ _ _
Yours very truly,
ATLAS GEOTECHNICAL ENGItiEERING, INC.
,�i 2{t"�
Roger we, Pr�neipal
4 copies submitted
Attachments �.:���'��•�,,
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Exploration iJa. 1
0-1.5 Rrcwn Silty SanG (5;;1 ;;r,c-�;��ra�21y �'en_e, damp) ( fi'sli
1, 5�-8.,5 Brown to 8? ue Gray �il � with gravel , cobbles F, bouiders
(`�Ll with �ccasional piece of a•;��od (irod�rately der:se we=?
ifill ) i•ock is gra,iular
�erf:cc dt 8.5�.
8..�-1�. 5 ;,ro,.�r �r��n'� �� lt (OL ; �-��it~� `rGy:r;,_�.t.s oF decay=d �;co� U
�.F�ge�a ti on to 6" s i=e.
?�.5-10.5 ,;,�ay S� 1 ty F;ne Sar.d l���li ���oclerat..'y �iens� �aet).
Crades fi ne and 1 ess si f ty.
Comp�2�ed 3123/c5
Sar�,ple Depth (ft) Nioi sture Ccr, tent k
11. 5" i40
Expiorati�n No. 2
C-5.5 Mixed Brow� Silfi and GraveT (ML-Gr1) with angular �abbles '
and boulders. (fill )
' Ghanae to bl ue at 2,5` and wi th rock to 200 1 bs.
Caving at 4.5' .
Seepage at fi' . -
o 5.5-10 Cobbles and Boulders with Silt,
z rock to 800 1 bs, at 7'
. Some woody debris at 8' _
0
, 10-10.5 Wood debris, organic silt and vegetation. Terminated due
to boulders and heavy caving
Comple ted 3/28/75
Sample Depth (ft) Moisture Content �
' m 10' 262
; c
3
W NOTES:
>
� 1} Depths in feet.
2) Fie7d engineer: Roger Lowe
3) Excavation using a EXPLORATION LOGS
Ford 755 backhoe ATLAS GEOTECHNfCAL
4) Moisture content is a PROPOSED OFFIGE/WAREHOUSE
� percentage of the sample ENGINEERING INC.
z
dry weight. PROJECT, RENTION, WA
3
� PLATE 2
�
o - - - _...,.��..�.� ..�.�..._�
...._�...,.�_.��.........,��..e..,.��.....�_...�.,__...:....�,.�K�..a._.0�.w�.�a..�.......__�a.�...,.�.�...�...�..�.�.a..._.�.-.�._,....�..e-,.._7=..7_,..,._...4.�tr�....-�
Exploration No. 3
u-10, 5 Brc�tn Gravelly, Cobb'}�� Silt {ML) ( fiil )
C��,:nge tc biue-gray color at 2.5'
He�vy seepage at 7'
Water levels 8. 25' 3%28/75
TeSi pit no� open iong e�ough ;or water 1eve1 to
j t v����Ze.
10. 5�-�5.5 3'row� Cryanic Sil i e,�d Si i ty Feat (F�H/P71 imoderat2iy
soft, r��ai�t? (decayed vegptationl
;5.5-17 Gray Si 1 t wi th Organic Debr�s (�`L/t�iH) (mo�era�c iy fir�m,
we t; .
17-i8 Dark Gray Fine Silty Sand (Si�?i ;cnoderately dense, wet)
Conple�ed 3/28/8�
Sample �epth (ft} Moisture Content b
14 210
0
z
�
0
Y
a
c
W
3
W
1
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EXPLORATION LOGS
� I 286WT - =r `b�bl �-11=�° zi���?n s�� �;T�1 .�.�$.��=,�,? .�:naT•���cx?a✓✓;�,�F�1�.1.,-�.Y?LY���•.���3,•1•.��� _ �
� tN(alNttF�iN(a 1NC:. : PROJECT,_RENTON, h1A !
y
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< PLATE 3
�
Q �..�
_'.________ ____ _�.__._e_______�.,...._..,_ -.-.�.
I
(
�xploration No. 4
0-3. 5 Brorrn Sandy Silt (��L) with rocks b cobbles (moderatly
dense, damp fill �
3.5-u.5 Blue Gravel and Cobbles (moderately dense, saturated)
� fill )
ldater at 3.5 feet, heavy flew.
�arre boulders, 2C0 lb+ at 6'
8. 5-9 3r•oa�n Orqa,� ic � i ; t tf•1L ) (inoderately soFt, n�ci � t)
{ topsoil ) .
9-15 Gradationa l cl,arc;� to A i ter•nu ti ng Brown �rgan i c S i 1 t anr'
Peat (P1H/PT), peat layers to 8" thick.
15-i7.� Dai-k Gray Silty Sand (SM) (h"o�Eerately dense, r�et)
(6" th ick si 1 t I aver at ib,5�
Completed 3/28/85
Sample Depth ( ft? i�loi stu��e Ccntent l��)
8.5 i�0
i0 320
11 153
16.5 47
0
z
m
0
�
0
W
� 3
W
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Y
EXPLORATION LOGS
ATLAS GEOTECNNICAL PROPOSED OFFICE/'�IAREHOUSE
Y ENGINEERING INC. PRo�ECT, RENTori, a�a
0
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3
i < PERTE 4
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--_.__-------�--_-�---------- - __�._. ._�,_._.w._.__�_.., �.�
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,
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=x�loration NC. 5 '
--- i
�-9 6rown Sand;� G:^avel ly Silt (P;L) i��c�e:rately Gense, =��ist) �
(fillj �
i
}
:.i th ��ock fr�yments a� 3 feet �
''v�.� ��� ?��) i)$ lii '��l ,_ ,il�:y ,�'.:I?I;�i 0i. .,. .. lr`..J F:.._'t. 4
� �r.,�.er at i' ;
�
1 y'"_2 �Y0!��i? 3tifj ltYdV Jl�l" (��L} W1LIl .?Y'�Jdl"i� rl''uGillc':iiLS
� ^� _ ,t� �,-µ� n-�n(i;��m Canr� lCGI �,�j �1� _ ?r.�('� �)'F S- 1 t: �.i:�;ili'r- ;
� s
` ":1�,� c!ens`, �.�et) _ , . . �
� . . _ . _ �
i
IC-l� Darl: �t"dj� t•leci ��r�� �a�(? � JF ) 1ti11:� 3 tY'BCP. i`i :,I i �.:
� (moderateiy dense, we�.? . ', ,
�
?:�C?Udes uray Siit iay�rS (P1Li ;Inode"dtely iirm, ,._t; 3n� i
i,`'4C2S �;f JY'�diliC ':idt�Yl�� bc"Olti �� i�tt. �
,,
E;:�,loration i�o. 5
� 0-7 Bro���n Sandy and Gravel ly Sil �: (?�I�) with rock fr��ments -
�
(moderately firm, moist) (filil
�
, � Rocky at �' . �
t � �
� ( � 7-8 Broken rock (fill ) . '
� t
i8-9 �rganic material at 8' . ;
I �
0 9-10.5 Brow7 Peat (PT) (maderately firm, saturated) �(:rLu Si7t �
.
x iML) (moderately firr�, saturated) ��
�
,
;
� �; 1�.5-:2 Brown Peat EPT) (me�era�ely finn, satur�ated) - '
� ,
�. � �Z-17 Gray Silt (hiL) (moderately firm, sat�rated; ;
� with occasional layers of peat at I3.5'.
�
Completed 3IL�%OJ
� I
� m Sa�ple Gepth ( ft) ��aisture Content � �
0 3 236 r
�
� � i
w �
or (
� — ---- �
. � EXPLORAT�TOf� ��GS �
� ' ATi AS GEOTECHN#�AL P��PD�E� �����/w��EHGUSE �
� ENGINEEFlNG IR�C. PROJECT, ����N, wA �
� �
m - �
z � �
� 3 PL�,T� � #
, <
� ;
a .._�..�..�_�..�_...�-�.,— --------- _._...v .� �.�.-_-.�.,.��..�....��
_ _ _ __ _ i
Explqration Vc. 7
0-3.5 6rown �"edium Sard ISP} with si it (rroderately dense, damp)
( fill )
� 3. �-7 aro4vn Si 1 ty Gr`vel (�'1` {�ense damp)
Charge to bl :�e at h' . Idater flo�,�ing in a- �'
;
� -'��. UIU� `.l�I.KY Ilti �UCi�l�c/ 1i1a(�i iii�yiilyi �
i �
� . .ci, 0'• , _ �_. ,. ,.�� .'.'� :, i
�,.,-.` ,.. ' ,^ �
� °_° �Y•,�,;,n i�r^ar!ic S�? t (P1H1 f,moderately firrn, saturaie�)
i � �
� �-1L. � ur'd�8�1Cii� . �il�� ;J LV ..� ..:�'�l fCc � ��T� ii����c;'� �E � � rl "' �
; � �
satura�edl
12.5-1� Daric 61 ue Gray Pieei um Sard {SP-S;�•11 wi th si 1 t
Completed 3/28i�5
S�mple �epth ( fti "•1oisture Content �
8 37
Exp�oration Nc. 8 �
0-2.5 5rown �ilty Sand (SM) with roots (modera tely dense, moist)
(fill )
Asphalt chunk From 2.5 to 3.5'
2.5-3.5 Blue-Gray Gravelly Silt (�"L) with rock fragments (dense
moi st? (fi 1 1 )
3, 5-9 Drown silt (h4L) wi�'� occasioral rocks and fr�gments of
o vegetation, (fill }
� Z
m 9-9.5 Black Organi c P1at
0
I 9.5-14.5 Brown Peat (PT)
Seepage at 12 ' grades with silt below 12.
'1 t (�"�? �i th so;�e erganic
14,j-?e.5 �rac�at?or�a� cnan�e �o Gray S� �;.
debris. (moderately dense, saturated)
� � Trace of sanu at in.5.
m ;ermi nated at 16.5' due to cbstructi ons that 1 imi ted
: o excavat�on. �
� 3 Cor�pleted 3/281�5 �
>
W
OC
I
EXPLORATION LOGS
ATLAS GEOTECHNICAL pROPOSED OFFICE/WAREHOUSE
ENGINcERING 1NC. pROJECT, RENTOy, WA
0
z
3
; � PLATE 6
i O �
Exploraticn �ti'c. 9
�-3 Bro�vn San�y Si 1 t {��+L i ( fi�1 ;
,�'.-�.5 7� UL' kOCii}` �I i � � v2i"}� uL'f1Sc',� f':dt"� C'laC i nv.
�.5-9 Si' ty Sandy Gravel �;��aP1� (very de^se, w�t; (fili )
i ,.,,, . „' . „ . . - _ � .....
_ , , j
� t'J:,KS CU 1J S-I LC G �i. / ,. - �
� _'j .-,_, .- - :,_ . --..;^'� �
tl :+t:OU ii2u�l� i J �U :-i�� u i�i�nc�ci' aq
� 1
� l� n_��. -1 T�� - i.. _ � 1., .a., ..� t_.,...� ...,...-!1 1
Q _-� . F o�'�;ii' r _ ., l , �_ i _ . i �, �C_ic. _i,- �` , �. , $: .... v .,�ui Y
� a ,
i4.5-17 �rada�;onal �han�2 to i�iixed �eat ar�d Gray Si 4L iPiii.i�)
(f�rm sa�ura�ed)
17-i8 �ray �ilt ;"�? ..i `h orgaric f��cne;�ts. �';ed��a�ely ��rm,
� sa tura ted)
1
Co�pleted 3/29!&5
Sample Depth (ft) �lo;sture Content �
10 101
1l. 185
12.5 193
17 44
0
. Z
m
0
I
I `
�
m
�
3 �. i
>
W
K
�XPLORATION LOGS
� ATLAS GEOTECHNICAL PROPOSED OFFICE/WARENOUSE
_ ,. _
ENGINEERING INC. PRo�ECT, RENTON, W'A
m
Z
3
` PLATE 7 '
�
0
�x�l�raticn i�c. 10
0-8 Brown Sandy Gravel 1y S� 1 t (htL) ldense, moi st) rocics ta :8'�
( fill )
Cra�ge to b? ue at o'
Seepage and some �a��i ng G� 6'
:'-S .,�.'�,. :- .'. � _,. _ - t ;
' _;(?I��)'d l i On 'r i 00:?"u, ��v�'f� .:c`v i�iy "
3 9
! �Y'��C la���i� ,.... .,. �
a!
; J-n... ���i1;' C;^n ..;^o�inl /^Dl fm(��ic�" .��iv rF�pSE.'. S3i.U.'d�eC� j
� G.r'J-1`l.� _.�n!w!l F"EdT 'clnu JI I L \r i ii�-i� M
! � '' €
� Chunk of parzially decayed wood at 1L.5 �
1G. 5-15 Gray Fine Gravel (GP) (moderately dense, saturated; �
a
�
15-17.5 P•lixed Peat and Silt witP� ?eat (°T/F1Nj -
1?.5-i8 Dark Gray Silty Sa�d (���1) (mGderateiy cer.s�, t•reij
Comple�ed 3/29/85
Sample Depth (ft) h1oisture Content �
10 147
11 133
I�
,
0
, Z
m
i
0
1
`� l _
,
► �
� �
}
m
o ,
' 3 �
>
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EXPLORATION LOGS
ATLAS GEOTECHNlCAL PROPOSED OFFICE/'r1AREH0USE
m
ENGINEERING INC. p�o�ECT, RENTON, '�IA
z
�
� ; PLATE 8
i o
�xploration s;o. 11
0-1.5 6rcw�n San�iy �r-avel 1y �i 1 t (h•1L) iP',aderately d�^se , dar�a)
(fiil )
1.5-i.5 Rec;.J Fill ti:it� �ilt
Color Chc3!1q� to blue at �.� '
;
� !, `_�-� iSEi:CK 0�'a;3l11C; iT�uCC�'idi . �
� g-17 t�'(3�,'ll l;' �dIl1C ., i I � �.ii � i _:1 " �. i :. ..._ .._. �� . - i � :
� �,r,.., ,,;��1 � �
� ltj-11 ��� dru.: � J;?3 � �!i� '.q? �� �i".,�r; i- _ui. i� � , . .,:,c� .. .,c �y' . . Y
� `- . j
R101 St)
1_-13.5 Gray silt (h1L-!1H) (�•rith fragme�ts of orgaric f�l'atET"13� �
(�noderatnl y fi rm, r�o�st;
13. 5-14.5 Dark Gray Sand ;SP ) with sor^� si ; t (noderat�ly ��ense, �
saturated;�
Cempl eted 3;"29;'c^5
Sample Depth ( `t) ��1oi sture Cont�nt � _
8.5 96
i0.5 253
0
z
m
i
0
I
; -
,
� i �
� ,.
: m
, o
' W ' �
�
W 1
- � �
EX.PLQR.4TION LOrS
ATLAS GEOTECHNICAL PROPOSED OFFICE/WAREHOL'SE
>
ENGINEERING INC. PRo�ECT, RENTON, wa
m
Z
3
j � PLATE 9
� o �
I
Exploration No. 12
0-3. 5 Brewn Sandy Silt (NL; (rrodera�2ly dense, damp) (f� ll ; �
4Ji th sor2 rocks at 2'
3. 5-� Erown and Blue �,�;th �rar,ge �ayers, 5�ndy �rav�liy �obbly
,
Sil � (h!L) (moderately dense, moist) (fill }
� 8-8. 5 RC::kV f; i � - �IJY`/y f �n�;� r.t ,.�`-�r ;
� ;
nOC� 'LO � � X L ii Z
! -
� " -� .,'_ ''' ' ' �
j ��.� .. ..�r. �- �... ...vi� i,�., .
! i
Y 9-Iu. S 3ro<<tn urgaric Si ( t ii•iH; , 'oc�er:. _>�; ��:��2, s_�_!r��?d? � ;
,
10. 5-11.5 G�ay si 1 t ;�"L; (r�derately dens�, saturated)
11. 5-15 Gray Medium Sand (SP) t'r�o��er�atel�� ���nse, sa�urat��) �
15-i5.5 Gray Siit (P-1L) (mzderately �ense, 53tu�-dted� t
15.5-15. 5 Dark 6ray San� (SP; {^�Icderately dense, satura+ed)
Corr�pleted 3/29/85
�xploration No. A
0-6.5 Brown t�1ediu� Sand (SP) (mOC2."d1:Ely dense - loose, moist)
;fill ) (caving)
, 'Jegetation mat at 5.5
0
z 6.5-9,0 Brown Peat (PT)
m
� ° ierr�ination @ 9' due to severe caving -
� I Com�leted 3/29/85
� � —
' j �
� }
m .
� � � 1
>
�
EX°LG'RAT:ON LOGS
ATLAS GEOTECHNICAL �ROPOSED OFFICE/WAREHOUSE
r
ENGINEERING INC. �Ro�ECT, RENTON, wA
. o
Z
3
' ` PLATE 10
i o
GEOTECHNICAL REPORT
Cedar River Corporate Park
SW 21 st Street and Lind Avenue SW
Renton, Washington
Project No. T-5996
;
,_..��,1.-=.
. �.�
.�,
.
� T rr
_ � e aA
. ._ . ssoc�ates In .
� . - � �
t :r
�
'� . - -�- _ f A, _�..
_ � �� ._ _..
i � � �
,
�
�
�
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Prepared for:
TAR N I
RAG O ,
� Seattle, Washington I,
�
r
Decembe 7 2006
,
- ��
_ _ . ��
-
��
TERRA ASSOCIATES, Inc.
� C�n�u��ta:�[S ir, Ge�.,fcChrical Er��,nee�m^ �������,I�,��r
and
6�vironmen[al Earth Scien�2-�
December ?, 2G06
Proiect'.��o. T-�996
'�ir. ��fuiphy:�1cCullc•sgll
T;'�R.R_AGO'_�
1Ci04 Second Avenue, Suite 3200
Se�sttle, ��'ashmeion 98104
Subieci: Geotechnical Report
Ceda:River Colporate Park
Sl�'21 st St�-eet and Lind Avenue SVJ
Renton, V4'ashi;.gCon
References: 1. Report of Soil Investigation, Proposed Storage Terminal, Renton,��v'ashington,
prepai-ed by Dames and Moore, dated May 24, i968
%. Report of Supp:emental In�-estigation,Pioposed WarehouseiOffice Building Site,
Lind Avenue, Renton, VVashingtor.,prepared by�tlas Geotechnical E..gineering, Inc.,
daied Aari: 1�, 19��
Dear Mr. '�1cCullough:
As requested, we have conducted a geotechnical engineeri:►g study for the subject project. The attached ieport
presents our findings and recommendations for�he geotechnical aspects of project design and construction.
Results oi our field exploration confirm soil conditions as indicated by previous site studies and summarized in
the referenced reports. We observed eight to ter feet of silty sand/sandy silt fiil overlying native soils composed
of organic silt and peat followed by interbedded a]]uvia] layers of sandy silt, silt, and silty sands. We also
obse:ved groundv��ater seepage ir.our test pits at depths of 9 to 14 feet beiow cunent site grades.
In our opinion, the existing fill wil] provide suitable immediate support for conventional spread footing
foundations. However, the immediate organic silt and peat layers will be subject to consolidation settlement due
to stresses imposed by the spread footings. If the risk for distortional settiement cannot be tolerated, a majority
of the potential settlement can be mitigated by surcharging the building si.es.
Detailed recommendations for surcharging the building pads and desi�n o: fouz;dations along w-ith other
geotechnical design considerations are p.�esented ;n the attached report.
i
12�25 ��ti'illows Road, Suite 101, Kirkland, Washington 98034
Phone (425) 821-7777 • Fax (425) 821-4334
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Project'�o, T-5996
Page No. i�i,�
TABLE OF C01TE'�TS
Page ?�o.
1.0 Pro�ect Description.......................................................................................................... 1
2.0 Scupe of��'ork................................................................................................................. 1
3.0 Site Conditions................................................................................................................2
3.1 Surface................................................................. .............................................. 2
�.2 Subsurface.......................................................................................................... 2
3.3 Circ�undu�ater....................................................................................................... 3
4.0 Seismic............................................................................................................................ 3
5.0 Discussion and Recommendations.................................................................................. 3
S.i General ............................................................................................................... 3
5.2 Site Preparation and Grading.............................................................................4
5.3 Excavations................................ ..................................... 6
...................................
5.4 Foundat�ons........................................................................................................ ? '
�.5 Slabs-on-Grade................................................................................................... 7
�.6 Storn�water Detention Pond............................................................................... 8
� - Drainage.......................... .................................................................................. 9 '
�.� Uti]i�ies............................................................................................................... 9
=9 Pavements........................................................................................................... 9
h �> Additional Services......................................................................................................... 9
7.0 Limitation� .............. ........ ....................... . ................................ ........ .. .................. .. lU
F_i�ures
'�'i�:nitv Map ...........................................Figure 1
„ .............................................................................
��ploratien Location Plan .................................................................... g
._., ....... Fi ure 2
........................
Typical Settlernent Marker Detai3........................................................................................Figure 3
Typica� Wall Drainage Deta;l ..............................................................................................Figure 4
Apnendix
Field Exploration and Labo~atory Testing.......................................................................Appendix A
Tect Pit Loes B�� Othe:s .... ...__ _._. .._... ... ... ... .. ............ . .... ................. ........ ......Append;x B
Geotechnical Report
Cedar River Corporate Park
SW 21st Street and Lind Avenue SW
Renton, Washington
1.0 PROJECT DESCRIPTION
Tne approximately 11.5-acre site is locate� between SV�' 21st and SW 2�rd streets, east of Lind Avenue SW in
Renton, `�'ashington. Site development �vill include constructing 4 office st�-uetures each approximately 33,000
square ieet in size. Specitic building design ir.formation is not yef availab;e; however, �r�e expect the buildings
will be constructed using precast c��crete tilt-up wall panels with interior isolate� columns supporting the roof
structu?-e and possible mezzanine le�els. Fioors will be constructed at grade at elevations near current site g:ades.
Structaral ':oading is expected to be �ight to moderate,���ith isolated colu:n.�s canyine ioads of 80 to IOQ kips; and
bearing w�alls ca:-rying 6 to R kips per foot.
Stoizm�-ater wi13 be collected and routed for trea.ment and con��olled discharge fi�om a detention pond located in
the northeastern panhandle of the site. Specific. pond construction-design information is not }et availaLle;
ho��-ever; we expect the pond wil� be constructed primarii}- by excavatiuns extending 8 to 12 fee#below cu~rent
site grades.
The reco�nmendatior.s ir. the follo��,�ing sections of this report are based on our understanding of:he preceding
design features. ��'e should re�riew design drawines as they become available to verifi�thzt our recommendations
have been properly interpreted and to supplemeni them; if required.
2.0 SCOPE OF WORK
Our work was completed in accordance with our autho:ized proposal, dated October 23, 2006. Accordingly, on
November 1, 2006, we excavated 8 test pits to depths of 13 to 15 feet below existing surface grades. Using the
resu�ts of our subsurface expioratior�aleng with existir.g soils data fi-om previous studies performed at the site in
9 � v
1 68 and 1985; we perfonned analyse� to de elop geotechmcal engmeermg recommendations for pro�ect des�gn
� and construction. Specifically, th;s repart addresse�s the iollowing: ,
• Soi? and groundwater condihons II
• Seismic ��
Site preparation and gradir:g '
� i
• Excavations
� • Foundation support alte.rn�ti�:es
�
� • Jlab-OT]-�ade S�t�pGri
• Draiaag�
• Utilities �
• Paver_:encs
i
De.cember ?, �006
P:oject No. T-5996
It snould be noted that recommendations outl;ned ir this report regardi:�g d:ainage are associated with soi:
s��ength, design ear�h pressures, erosion, and stability. Design and performance issues ���ith respect to moistu-e
as it relate� to ihe structure environ:r,ent (i.e., humidit�r, mildew, mold} is beyond Terra Assoc�ate.s' pu:'view. A
building envelope specialist or con�actor should be consulted to address these issues, as needed.
3.0 SITE C01-DITIOtiS
3.1 Surface
The project site is located southeast of the intersection oi SW 21st Street and Lind Avenue SW in Renton,
V�'ashington. The approximate location of the site is shown on Figure 1.
The site is nearly rectangular ar�d includes a small panra�idle parcel that forms the sites northeastem corner. The
site is c�nYently vacant with surtace vegeiaiion consisting of deciduous trees with moderate blackberry and brush
understory. The site is elevated above adjacent parcels to the north; east, and south and at grade with Lind
.�.�enue to the west. The site was filled in the late 196Gs in preparation ior developing the site as a fuel storage
Taci:ity. Previous exploration coinpleted at the site by others in 1985, indicated fill depths of 8 to 10 feet across
the property.
3.2 Subsui�face
Soil conditions we observeci at the receat test pit e.xcavations confirtn the earlier site studies. In genera], v��e
observed approximately nine to ten feet of fill material compo�ed of silty sand and sandy silt mixed in areas with
fractured fragments of bedrock. Large boulder sized (two- to four-foot diameterl bedrock fragmer.ts were
observed below tiv ee to four feet at all test pits. This fill overlies the original surface vegetation which appears
to have included some small trees as logs were observea at a few of the test pits. Underlying the fill and originai
organic surface layer, we observed a two- to four-foot layer of organic silt and peat. Previous test pits excavated
in 1985 indicated the thickness of this layer ranged fi-om about two feet to a maximum of about seven feet.
Underlying these o:ganic soils, alternating layers of silty sand, silt, and sandy silt were obser�-ed to the test pit
termination depths.
The Geologic Map of the Renton Quadrangle, Washir.gton, by D.R. Mullineaux (1965); maps the site soils as
Peat (Qlp) and Alluvi�m (Qaw). The native soils we observed in the test pits are consistent with these
descriptions.
The preceding discussion is intended as a general re�zew of the soil conditions encountered. For more cornplete
descr;ptions, please refer to the Test Pit Logs attached in .�.ppendix A and B.
Page No. 2
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�i
December?, 2000
Project No. T-�996
3.3 Groundwater I
���e observed �-oundwater seepage at depths ranging from 9 to l4 feet below the current site elevat:ons. The
previous 1985 study at the site indicated ligllt to hea�y groundwater seepage into the test p;ts at depths ranging
fi-om 6 to 10 feet below site grades that existed a; that tirne. Flucivations m ground�vater levels ��s�ill occur
seasonally and annually, with lowest levels and volumes occLrring during iate sumrner to early fall (July through '
September). Given the time of year our e:xploratior. work �;-as completed, groundwater seepage levels observed
l:kely represent seasonal ]ow levels.
A two-inch diameter slotted P�'C pipe w�as insta')ed in Test Pit TP-2 when backfilled. This installat�on, while �
crude, will allow for measuring the depth to groundwater dur�ng the upcoming winter months a:,d obtain a better
understanding of seasona] high groundwater elevation at the site. V1e expect the groundwate:would be p:e.seat at
depths of five to six feet beiow the surface during and shortly following the wet winter season.
I
4.0 SEISI�TIC
Based on the soil conditions encountered and our understanding of area geology, per Sectio�i 1615 of the 2003
I�lternationa] Building Code (IBCI, site class "D" should be used in design of the sn-uctures.
Liquefaction is a phenomenon wl:ere there is a reduction or complete loss of soil strength due to an increase in
��aier pi-essure induced by vibrations. Liquefaction mainiti� affects geologically recent deposits of ]oose, rine-
era:ned sand and sil:y sand uncerl��ing :he groundwater table. Soils oI this nature deritie their strength Trom �I
intergranular friction. The generated water pressure or pore pressure essentially separates the soi] grains and �,
eliminates this intergranular friction; thus, eliminating the soil's strength. '
Irfo:mation obtained from our recenc subswface exploration indicates that the deeper naCi�-e soils at the site are ,
allu�-ia1 in origin. Groundwater was observed ai variable depths rangine from 9 to 14 feet below current site '
grades. Histor�cal data indicates that the alluvial sand layers below the water table exhibit medium dense to �ery
dense characteristics. The deeper alluvial so;l strata composed of sandy or clayey silt, due to their fines content,
���ll exhibit cohesive strength, and are not significantly be affected by the liquefaction phenomenon. Based on
analvsis ir. our o inior. the risk for soi]li uefaction to occur at the site and its associated hazard are low.
. , P , q
5.0 DISCUSSIOti AND itECOMMENDATIONS
5.1 General
The primary geotechnical consideration that will go�em s;te development is the potential for di�to:tional building
settlements to occur due to the compressible organic silt and peat layers that were obse�ved across the site. These
native soil layers v�-ill consolidate under static dead loads imposed by the structures anc product loading on floor
slabs constructed at grade. Assuming a 100-kip column load, a bearing stress of 2,000 psf, and a maximum
footing depth of 2 feet below current site grades, analysis indicates settlement ranging from 1 to 4 inches could
occur with differentia] movement of 1 to 2 inches. We estimate the differential settlement would occur o��er a
bu;lding span of 100 feet. This settlement will likely be distortiona3 and cause buiiding cracking along with
misalignment of doors and windows. If the risk for distortional building settlements cannot be tolerated, a
majority of the poteniial settiement can be mitigated by surcharging the buiidine sites. Surcharging would
mvolve placing additional fill on the building pads above the finished floor elevations to induce primary
consoiidation settlements to occur before building construction is initiated.
Page No. 3
December %, 2006
Project No. T-5996
In our opinion, the existing fill soils ai-e sufiic�enth� coinpact to provide suitable immediate support for the
buildings using c.onvent�onal spread footing foundation�. However; the soils are sensitive and v.-ill be easily
disturbed by normal censtruction activity. Consideration should be given to placing a four-inch layer of crushec
rock over the bearing subgrade to serve as a working mat and to protect the soils from disturbance especially if
work occurs during the winter. Similar consideration should be given for protecting the integrity of the building
fioor and pavemert subgrade. Cement amending the subgrade should be considered if the cons`�ruction schedule
results in the soi] subgrade being exposed to wet weather.
The fil] and nati��e soils encour.tered at the site contain a significant amount of fines and will be difficult to
compact as structural fill w�hen too wet. The ability to use on-site soils from the site excavations as structural fill
w�ll depend on its moisture content ar.d the prevailing weather conditions at the time of construciion. The
earthwork contract�r should be prepared to dry the soils by aeration during the normal]y dry summer season to
facil:tate compaction as sh-uctural fill. Altemativeh�, stabilizing the rnoisture «�ith cement kilr. dust (CKD),
ceme=�t, oi- lime car be considered. If grading acti��ties wili take place durme the �rinter season, the earthwork
ar,d uti;in� contractor should be prepared to in�port clean �ranuIar material for use as structural fill and backfill.
L: add�tion, the utility contrac�ors shouid be prepared for encounter�ng large boulder-sized bedrock fragment�
�a.ithin the existing fi]] where excavations extend to depths of four feet and greater below the site. These larger
f:��gment� will not be suitable for reuse in backfilling the utility trenches and will likely require disposa) off-site.
Detailed recommendations regarding these issues and other geotechnica] design considerations are provided in
the. following sections. These recommendations should be :ncotporated into the final design drawings and
co:,st:uction specifications.
5.2 Site Prenaration a�id GradinQ
Surface vegetatio:� and the uppe: o:ganic soil layer should be stripped and removed from the site. Based on our
recent test pits, surface st�-ipping depths of about six inches should be expected to remove the vegetation and
near-surface organic layer. Once clearing and grubbing operations are complete, grading to establish desired
building elevations can be init:ated.
Exposed subgrade should be observed by a representative of Terra Associates to verify that soi; conditions are as
expected and suitable for support of new construction or additional fill. Our observations may include requiring
the contractor to proofroll the exposed subgrade with heavy rubber-tired construction equipment, such as a grader
or loaded dump truck, to determine if there are excessively soft and yielding areas. If unsuitable yielding
subgrade is exposed and it cannot be stabilized in place by aeratior, and compaction, the affected soils should be
excavated and removed to firm bearing and ��ade restored with new structural fill. If the depth of e�:cavation to
remove unstable soils is excessive use of a geotextile reinforcing/'separation fabric, such as Mirafi SOOX or
equivalent, can be considered in conjunction with clean granular struc:ural fill. Our experience has shown that,
in general, a minimum of 18 inches of a clean, granular structural fill over the geotextile fabric should establish a
stable bearing surface. Alternatively, it may be feasible to stabilize the soils by amending �rith Portland cement,
CKD, or lime.
Pa€e No. 4
I�ccember �. �C�(16
Pro-ec�t T�o. T-_`�)46
Il grad:�ng act���it�es are� plan�ed during the wet winter mo-:nc, aricl the on-s,te soils become �oo wet to achie.�e
adequate compaction, the ow-ner or contractor should be prepared to treat soiis with CKD, lime, or cement, o:
import wet weather structu;al fill. For wet weather structural till, we recommer�d importing a granular soil tha�
_ meets the following gradir_g requ.rements:
C.S. Sie��e Size Percent Passing
6inches 100
No. 4 �5 maximum
I�o. 200 � maximum*
*Based on the 3'4-mch fraction.
Prior to use, Terra Associates, Inc. should examine and test all materials to be imported to the site for use as �
structural f.11. Structural fil; should be placed in unifol-m loose la}-ers not exceeding 12 inches and compacted to
a minimum of 95 percent of the soi]'s maximum dry density, as determined by American Society for Testine and �
�laterials (ASTI�4) Test Designation D-698 (Standard Proctorj. The moisture content of the soil at the tirne of
co�npact;on should be vwithin two percent of its optimum; as determined by this ASTI��1 standard. I�I nonstructural
a:eas or for '�ackfill i:� utilitti� n�enches belo��- a depth of 4 `eet; the degree of compaction can be reduced to 90
�e-cent �'
.�s :iote.d e.�rl�ei�, if foundatic�n s��bgrade i� e.xposed to tive` ti��e.athe-r, consideration should be given to protecting �
the sub��ade from disturbance by placing a four-inch mat of crushed:ock over the subgrade to serve as a working
m�t For the building pad and pavement subgrade subjected to dymamic loading from construction vehicle tratfic,
amer.ding the top 12 inches of subgrade with Portland cement or placing ]2 inches of wet weathei- granular
�t:u�tura'. i:ll on the sub�-ade te prevent deterioratior. �}:oulc be con�idered.
Su rcharge
?.s cisc;:s:ed earl�er, �1 di�tor:ional settlement ra:��ing �rom 2 to -+ inche.s in tota: and 1 to 2 i�ches diffzren:i;.11�,
o�•-er a 1G0-foot span cannot be tolerated, we rec�mmend surcharging the building areas to induce settlement in
t}-:e primarv consolidation range prior to building construction. For this procedure, w�e recommend placing fill in
t�e building areas for a minimum height of three feet abo��e proposed bu�lding finished floor elevations. This
surcharge fill does not need to meet any special requirements other than having a minimum in place unit weight
or 120 pounds per cubic foot (pc�. However, it may be advisable to use a good quality fill to raise grades in
o;her portions of the site, such as parking and driveway areas, or use for trench backfill if necessary. The
surcharge fill should extend a minimum oT two feet beyoi;d the edge of the perimeter building footings.
Total settlement under the surcharge fill is estimated in the range of two to four inches. It is estimated that 90
�e.rcent of the consolidation settlement will occur in about three to four weeks following full application of the
�urcharge filL �
Page No. 5
Decen:ne._ - ,�ii��(
Project No. T-5996
To verify the amount of settlement and the tiine rate of movement, the sarcharge program should be mon:tored by
insta:ling settlement markers. A ty�ica] settlement marker detai] is showm on attached Figure 3. The settlement
rnarkers should be installed on the existing grade prior to placing any surcharge fiil. Once installed, elevations of
both the fill height and ma-ker should be laken daily until the ful] height of the surcharge is in place. Once fully
surcharged, readings should conti�ue weekly until the anticipated settlements have occurred. I�lonitoring da�a
should be forwarded to us for review.��hen obtained.
It is cr:tical that the g.�ading contractor recognize the importance of the. settlement marker installations. Al]
efforts must be made to protect the markers from damage during fill placement. It �s dtfficult, if not impossible,
to evaluate the progress of the preload program if the markers are damaged or destroyed by construction
equipment. Ir the markers are ;mpacted, it may be necessary to install new markers and extend the surcharging
time per�od in order to ensure that settlements have ceased and building construction can begin.
Following the successful completion of the surcharge program,with foundations designed as recommended in the
, Foundat�on Section of this repo�t, max:muin total post-construetion settlement is estimated at about 1 '/z inches
with diiferentia] �novement of about one-half inch. If post-construct;on settler:�e-�t of this magnitude is not
::ons�dered acceptable, buiidings shou]c'�e supported on a pile Toundatio:�.
5.3 Eacavations
.-�:' exca��ations at the site associated with confined spaces, such as utiIi�� trenches �nlist be completed in
sccordance «�itn local, state, or federal requirements. Based on current Occupaiional Safety and Health
.ydministration (OSHA)regulat�ons; soils found on the project site would be classified as Group C soils.
For properly de«atered excavations more than 4 feet but less than 20 feet in depth, the side slopes should be laid
back at a minimum slope inclination of 1.5:1 (Harizontal:Vertical). If there is insufficient room to complete the
e�:cavations in this manner, or if excavations greater than 20 feet in depth are planned,using temporar}� shorir.g to
s:�pport the exeavations may need to be considered. Utility trench sidewalls can be supported by a properh
de�igned and installed shoring trench box.
Cn-ouadwater seepage should be anticipated within excavahons extending to depths of five feet and greater below
existing surface grades. For excavations below ten feet, the volume of water and rate of flow into the excavation
may be significant. Shallow excavations that do not extend more than two to three feet below the groundwater
table can likely be dewatered by conventional sump pumping procedures, along with a systern of collection
trenches. Deeper excavation may require dewatering b�� well points or isolated deep-pump wells. The utility
subconn�actor should be prepared to implement excavation dewatering by well point or deep-pump wells, as
needed. This will be an especially critica] consideration for any deep excavations, such as that which may be
required for lift station construction or sanitary sewer connections.
This information is provided solely for the benefit of the owner and other design consultants, and should not be
construed to imply that Te�7a Associates,Inc. assumes responsibility for job site safety. Job site safety is the soie
responsibility of the project contractor.
Also, as noted earlier, the contractor should be prepared for encountering large boulder-s�zed bedrock fragments
w�thin the existir.g fill below depths of four feet.
Page No. 6
lleeen-�r�cr� �i��C!6
�'7O'E��l �0_ T�-_�yUfi
�.�3 Foundation�
T17 011i O�11I77071, t('e i��.�C'71'_ ]1;5' ;�C _i' Jri�'j i�n :�---`.--;1�:�';�- -C;1� :�•�';:il; ?�_'L��;11:��.i� �c3ll: l�ll U�::15:.]l�':�
subgrade composed of exisang inorganic fil?. Foundation subgracle should be prepared as recommended in
Section 5.2 of this report. Foundations exposed to the �u�eather shoutd bear at a mtnimum depth of 1.5 feet bele•�,
adiacent grades for Irost protection. Interio- �oundations ca� be s��pported at any con��enient dept^: belo«� th:
floor slab, provided immediate support is obtained on a minimum of two feet of structura] i:ll.
�'�'e recommend des�gning foundat�ons for a nei aliov�-able bearing capacity of 2,000 psf. For shon-tenu ;o�d�,
such as wind and seismie, a one-third inerease in this allowzble capacity can be used. Follo�r�ing success2u:
completion of t�ne surcharge program, with foundations bearing at a maxirnum depth of two feet below curre�.t
site grades and with the expected building loads, estimated total settlement should not e�cezd 1 '.'� inches n��:l-:
differential sett)e:nent over a lOG-foot bui'ding span not exceeding one-half inch
If foundation depths w•ill exceed two feet, c�ecs imposed on the organic cor.solidarng :�}er ��il: �:-ic;ea�r If
footing subgrade will exeeed two fee't '�e,o��� exis:ir.�� s:te grade. �.��e �hoald be no�i.`ied and askec to ree�-aluatc
potenti�l foundation settlemer.t impact�.
For designing :oundations to resist latera] loads, a base ir�et�on coe.fic.e.,;t o,` 0.�5 can be Lsed. Yassi�e ea:-t]-.
pressures aciing on the sides of the foot�ngs can also be considered. We re�ommend calculat�ng this latera'
resistance using an equivalent fluid �veight of 250 pcf. We do not reco:nmend including the upper 12 inches o�
soil in this camputation because it car.be affected by weather or disturbed by future grading activity. This value
assumes fhe foundation will be constructed neat against competent native so:l or backfilled v��it'� structura� fill. as
desc�:bed in Sect�or. 5,2 of rhis repu,t. The valaes recorimended ir.clude a saiety factor or 1 S
5.5 Slabs-on-Grade
�:abs-on-grade may be supported o- tae subgraue prepared as reco:nnended in Section 5.? of th�s repc�r-t.
Immediately betow the floor slab, we recommend placing a four-inch thick capillary break layer composed o=
clean, coarse sand or fine gravel that has less than three percent passing the I�o. 200 sieve. This material w:ll
reduce the potential for upward capillary movement of water through the undei-lying soil and subsequent wetting ,
of the floor slab. '
The capillary break layer will not pre��ent moisture intrusion throug'� the siab caused b} ��ater vapor I�
transmission. VJhere moisture by vapor transmission is undesirable, such as covered floor areas, a common
practice is to place a durable plastic membrane on the capillary break layer and then cover the membrane with a
layer of clean sand or fine gravel to protect it from damage during conscruction, and aid in uniform curing of the
concrete slab. It should be noted that if the sand or gravel layer overlying the membrane is saturated prior to
pouring the slab, it w�i11 be ineffective in assisting in uniform curing of the slab and can actually serve as a v��ater
supply for moisture transmission throu�h the slab and affecting floor coverings. Therefore, in our opinion,
covering the membrane w:th a layer of sand or gravel should be avoided if floor slab construction occurs during
the wet winter months and the layer cannot be effectively drained. Placement of the concrete directly on the
plastic membrane may require adjustments in the concrete mix design and spacing of control joinis to reduce the
effects of dry shrinkage. The American Concrete Institute {AClj Manual of Concrete Practice, Section 302.IR,
should be consulted regarding installation of vapor barriers and concrete slab-on-grade floors.
Page No. 7
December?, 2006
Froiec�:�To. T-�996
Fu. des�gn of tne floor�lab�-on-erace, a �ub�ade modulus �k5j oi lOG �pci) can be used.
5.6 Stormwater Detention Pond
The stonnwater pond will be iocated in the northeastern pan handle of the property. The pond per:meter will be
formed by cast ir place concreie retaining wa]]s. As we unde:stand, the retaining wall footings will bear at a
depth of about seven to eieht feet below existing site grades.
Two test pits, TP-1 and TP-2, were excavated witrin the proposed pond area. In general, soil conditions
ubserved consisted of three feet of loose to medium dense siiry sand fi:l overlying fill composed of clayey silt
«-ith «�eathered bedrock pieces to small boulders. Beneath the fll, at depths of eight to ten feet, we observed the
oriainal organic surface layer of brow�n organic silt to peat. At depths of 9 to 14.5 feet, we observed gray silt to
��ray si]'y sand. We observed rnoderate to hea�y ground�vater seepage at a depth of 14 feet in the test pits.
To establish suitable support for the pond perimeter ��.�alls, it wiIl be necessarv to excavate ar.d remove the
e�:i�ting fill and peat from below rhe �-a;] foundation. The excavation to rernove this unsuitable material should
e�::end lacerally fr�om the footing edge a minirnum distance of three feet. Once removed, the foundation grade can
be restored using structural fill placed and compacted as recoinmended in the Site Grading and Preparation
.ection of this report (Section 5.2). 1�he wall footings can then be designed using soil parameters outlined in the
Foundation section (Section 5.5). The exception will be the lateral passive earth pressure resistance. Because
t::e soils in front of the footing «�ill be submerged below the stored water in the pond, the passive earth pressure
used should be reduced to 180 pcf. Tnis value requires that the footing be backfilled with structural fill and the
'_��:1 extends horizontally in front oI the footing a distance equal to the footing thickness or depth below the pond
`_loor grade.
T�e magnitude of ear-th pressure development on the pond retaining wa?is wi':i partly depend on the qualiry of
backfill. �'�'e recommend placing and compacting wall backfill as structural fill. To guard against the buildup of
h�:drostatic pressure, wall drainage must also be installed. A typical wall drainage detail is attached as Figure 4.
���'ith granular backfill placed and compacted as recommended and drainage properly installed, we recommend
ce�igning retaining walls for an earth pressure equivale�t to a fluid weighing 35 pc£ VJ�en necessary, to account
:or traffic surcharge, the w-all should be designed for an additional height of two feet If the walls cannot be
e:fectively drained, they should be designed to support an earth pressure equivalent to a fluid weighing 85 pcf.
5.7 DraitiaQe
Surface
Final exterior grades should promote free and positive drzinage away from the site a: all times. V�'ater must not
be allowed to pond or collect adjacent to foundations, or within the immediate building areas. We recommend
providing a gradient of at least three percent for a minimum distance of ten feet from the building perimeters. If
t:.is ��radient cannot be provided, surface water should be collected adjacent to the structures and disposed to
a�propriate storm facilities.
Page'_�1o. 8
December?, 2006
Project No. T-5996
S.8 Utilities
Utility pipes snould be bedded and backiillec in accordance with American Public �T�'orks Association (!�P`VA),
or City of Renton cpecifications. As a minimum, trench backfi:l should be placed and compacted as structurai
fill, as described in Section 5.2 of this report. As noted, most o:the existing fill anci the underlying native soiIs
«-i11 be wet of optimum mo:sture when exca�-ated. The utility contractor must be prepared to dry the soil by
aeration or amend with CKD, cement, or lime to stabilize the moistsre to facilitate proper compaction.
Alternatively, or if utility construction takes place during the wet winter months, it may be necessary to import
suitable wet «-eather till fo�- utitity irench backfilling. Also, the utility conn�actor should be prepared for
en:,ountering small to ]arge boulder-sized fragments of bedrock contained «�ithin the fill in excavations tllat
extend to depths of four feet and greater. These boulder-sized fragments wil] not be suitable iar reuse in trench
backfill and will likely require off-site disposal.
5.9 Pa��ements
The pavement design sect�on is dependent upon the support:ng capability of the subgrade soils and the traffic
conditions to whieh it will be subjected. �'�'e expect traffic at the facility will consist of mainly of cars and light
trucks, with only occasionai hea�y traffic in the form of tractflr�railer rigs. For design considerations, we have
assumed tiaffc can be represen�ed by an 18-kip Equivalent Single Axle Loading (ESAL} of 50,000 over a 2U-
vear design life. Vdith a f:rm an ur,yielding subgrade pre.pared as reco*nrr:ended in Sectio� 5.� of this report. we
recomnend :he. following pave-nent section altematives be used:
• Two inches of AC over three inches of asphalt-treated base (ATB)
• Tw�o inches of AC over six inches of crushed rock base(CRB;�
In areas where Portland cement concrete (PCC) pavement will be conside.ied, «e recommend a minimum 28 da�
concrete compressive strength of 4,000 pounds per square inch (psi) be used with a minimum un-reinfo:ced
thiclrness of tive inches. Conu-ol or construction j oin�s should not be spaced at intervals of more than 20 feet.
Asphalt concrete should meet the requirements for '/z-inch HMA, as outlined in Washingion S#ate Department of
Transportation's (VJSDOT) standard specifications. Asphalt-treated base and crushed rocic base should also meet
W SDOT requirements.
Long-term pave�nent perforn�ance will depend on surface di-ainage. A pooi-]y-drained pavement section will be
subject to prernature failure as a result of surface water infiltrating into the subgrade soils and reducing their
supporting capability. For optimum pavement performance,we recommend surface drainage gradients of at least
two percent. Some degree of]ongitudinal and transverse cracking of the pavement surface should be expected
over time. Regular maintenance should be planned to seal cracks when they occur.
6.0 ADDITIONAL SER��ICES
Terra Associates, Inc. should review the final design dra��-ings and specifications in o:der to verify that earthwork
and foundation recommendations have been properly interpreted and implemented in project design. We should '
also provide geotechnica] services during construetion to observe compliance with our design concepts,
specifications, and recommendations. This will allow for design changes if subsurface conditions differ from
those anticipated prior to the start of construction.
Page No. 9
Decembex ". �0+1�
Prc��,eet I�o. T-��99C
-.o ir�ilr�rio�s
'���C p:��diC:(� t}11S le��'OI�I :il aCC07��11Ce «�IL': �,cI7cI"31�'.` BCCcpte� ��.pieC}L`"�1C3: eriL]rieE1'7P:� "Jl'3�t]CeS NO Ot�lE1"
�.l ar.�anty, expressed or �mpIiea, is maoe. This report is the copyTighted propert;� oT Terra Associates, Inc. and i�
.::cended for specific application to the Cedar River Corporate Pa:k project. This report is for the exclusive use
o:T:�IZRaGON and their authorized representatives.
The analyses and recommendations pi-ese:�ted in this report are based or. data obtained from the test pits
excavated on the s;te. Variations in soil cond3tions can occur, the nature and extent of which may not become
e�;dent until construction. If variations appear evident, Terra Associates, Inc. should be requested to reevaluate
t:�e reco:-ti-ne�3ar�o-�� in tnis re�ort pric�r;�� prc�ceediag��.i:r_ con;tn;c:ion.
Page No. 10
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REFERENCE:ITHOMAS GUIDE CD-ROM, KING/PIERCE/SNOHOMISH COUNTIES, 2004 NOT TO SCALE
� Terra VICINITY MAP
CEDAR RfVER CORPORATE PARK
•'• Associates, �t1C. RENTON, WASHINGTON
Consuitants in Geotechnlcal Engmeeriny
Geology and
Environmental Earch Sciences Proj. No T-5996 Date DEC 2006 Figure 1
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Y
.e' � � I ��,: „°'a'
i
�r���'�" ;w� �'�=9 F�,E�� APPROXIMATE SCALE IN FEET �'
,'� �..,o �
NOTE:
rH�s s�rE P�,arv�s scHEr,�Aric A���oc�.TioNs�,Nc EXPLORATION LOCATION PLAN
DIi�IENSIONS ARE APPROXIf�iATE. 1T IS INTENDED FO
REFERErvcE orv�Y NN�s+�ou�o Nor s� usE�FOR CEDAR RIVER CORPORATE PARK '
DESIGN OR CONSTRUCTION PURPOSES RENTON, WASHINGTON
REFERENCE:
SITE PLAN PRO�'i�E�sv cuEr�T Proj. No.T-5996 Date DEC 2006 Figure 2
STEEL ROD
PROTECTIVE SLEEVE
'. HEIGHT VARIES _ .
SURCHARGE (SEE NOTES) SURCHARGE �
OR FILL � . OR FILL ' .
:�/.. /� /./��v�,i,.�/>/i,�i�. ��i,� /�%/�:� /��/,•, / ..i/
.. /
NOTES:
�. BASE CONSISTS OF 1J2" THICK. 2'x2' PLYWOOD VJITH CENTER DRILLED 5/8" DIAMETER HOLE.
2. BEDDING MATERIAL, IF RECIUIRED; SHOULD CONSIST OF CLEAN COARSE SAND.
3. MARKER ROD IS 112" DIAMETER STEEL ROD THREADED AT BOTH ENDS.
4. MARKER ROD IS ATTACHED TO BASE BY NUT AND INASHER ON EACH SIDE OF BASE. �I
5. PROTECTIVE SLEEVE SURROUNDING MARKER ROD SHOULD CONSIST OF 2" DIAMETER �i
PLASTIC TUBiNG. SLEEVE IS NOT ATTACHED TO ROD OR BASE. ,
6. ADDITIONAL SECTIONS OF STEEL ROD CAN BE CONNECTED Vv'ITH THREADED COUPLINGS.
7. ADDITIONAL SECTIONS OF PLASTIC PROTECTIVE SLEEVE CAN BE CONNECTED WITH PRESS-FIT
PLASTIC COUPLINGS.
8. STEEL MARKER ROD SHOULD EXTEND AT LEAST 6" ABOVE TOP OF PLASTIC PROTECTIVE SLE�VE.
9. STEEL MARKER ROD SHOULD EXTEND AT LEAST 1"ABOVE TOP OF FILL SURFACE.
� Terra TYPICAL SETTLEMENT MARKER DETAIL
" '� � CEDAR RIVER CORPORATE PARK
•• Associates, IIIC. RENTON, WASHINGTON
Consultants ir�Geotechnical Engineering
Geology and Pro No.T-5996 Date DEC 2006 Fi ure 3
Environmental Earth Sciences 1 9
�2" MIhRv1Uh1 3;a��
MINUS �tiASHED
GRAVEL SLOPE TO DR.AIN
12"� ,;:. .
V .,.
-, .,,
: �>x� ;: ». .. ..
;
� ��
�c� \�
G�o� �
� �
' .',�, ; , :. ;.�
, �:� .� . < COMPACTED: ' �
:`3� ,�
STRUCTURAL FILL
�"�Y .��.�/ .
•�f��� �
^ ��'� /
;,�, ;'\\
�h �
SEE NOTE u�,y' ;,;
� ;,4_,� ;�'� EXCAVATED SLOPE
/ �,,� {SEE REPORT TEXT
` .��ar"
�: � FOR APPROPRIATE
6��(M�N.)� �'r`,-� . INCLINATIONS)
ll. _ .1:,1 J :l `J.�1:J; :l /.
1•
.�,��� �i ,��'�� �`',?i�`'-, `i o \ ' �12" O\/ER PIPE
��`s o-��c� 'S3'�� i�c,����
... .,:�;<�,:�„�.-;�.��� • � - . < • . ;a �' ' L
� � ,���
,;�: . . �:i.�<�;:.,�r,:��,%��i.`; .�:
� 3" BEL01��J PIPE
4" DIAMETER F�ERFORATED PVC PIPE J
NOT TO SCALE
NOTE:
MIRADRAIN G100N PREFABRICATED DRAINAGE PANELS OR SIMILAR
PRODUCT CAN BE SUBSTITUTED FOR THE 12-INCH VJIDE GRAVEL
DRAIN BEHIND VJALL. ORAINAGE PANELS SHOULD EXTEND A tvllNlt�1U��4
OF SIX INCHES INTO 12-INCH TNICK DRAINAGE GRAVEL LAYER
OVER PERFORAT�D DRAIN PIPE.
� Terra TYPICAL WALL DRAWAGE DETAIL
. , ••� Associates, It1C. CED RENTON, WASHI�NGTON ARK
Consultants in Geotechnical Engineennc
Geology and G pro No.T-5996 Date DEC 2006 Fi ure 4
Environmental Earth.,�iences ) g
aFPE�DI?��
FIELD EXI'LOR�,TION AI�D L_ABOIL�TOR�' TESTING
, Cedar Ri��er Corporate Yark
Re�►ton, V1'asl►ington
On November 1, 2006, we performed our field explorations using a mid-�ize trackhoe. ��e expiored subsurface
�oil conditions at the site by ekcava`.ing 8 test pits to a maximum depth of 15 feet below e�;isting surface grades.
The test pit locations are shown on Figures 2. The test pit locations were approximately determined ��:
measurement� from existing site features. The Test Pit Logs are preser.ted on Figures A-2 throu��h .�-9.
An engineering geologist fro�n our office conducted the field exgloi-ation, classified the soi; cond�t_on�
encountered; maintained a iog of each test pit, obtained representative soil samples, and observed pertineni s::e
features. All soi] samples were �i�u::]'.�� c',a�si`:e� �-� :.:cor�a:�ce ���it~: the t-nifie� �oii Cla��i�:,a'.i�,n S�>te..,
�CISCSI described on Figure A-].
Representative soil samples obtained Irur: the test pit� ��ere pl�ced ,n cJose� contair.ers and taken to o��r
laboratory for further examination and testir_g. The moisture content of each sample ��ras measured ar.d ;�
reported on the Te�t Pit Logs. Grain size ana;yses we.re performed on tour samp':es. Ttie results are �110��� ��-,
Figw-e� A-10 :hro;:�_; :".-1 l.
Project No.T-5996
i �
f��1AJOR DI�;`ISIOt�'S I LETTER TYPICAL DESCRIPTION
s�MBo�
j ' Clean GW , VJell-graded gravels, gravel-sand mixtures, little or �:o
� i GRAVELS Gravels ' �:nes.
cn a �
J � � (less than GP � Poorly-graded gra��els, gravel-sane mixt�res, little or
O � N More tr�an 5% fines) � nc fines.
Cf) �"v, 50°ro Of COafse ', Silty gravels, gravel-sand-silt mixtures, non-plastic
0 .� � frac.ion is Gravels ' GM ! fines.
i larger than No. �ti,ith fines
z ��� d sieve � Cla e ravels, ravel-sand-cla � mixtures, �astic flnes
Q Eo ' GC YY9 9 ) P�
� o c�v Clean SW � Wel!-graded sands, gravelly sands, little or no fines.
`�' SANDS Sands i
o ---�.
w �Z ' {less than SP Poorly-graded sands or gravelly sands, little or no
� L c I More than 5°ro f�nes) i fines.
�
Q a� I 50%, of coarse -
p �"' fraction is S(�/� Siity sands, sand-silt mixtures, non-plastic fines.
U � smailer than Sands _
No. 4 sieve � with fines SC Clayey sands, sand-clay mixtures, plastic fines.
Inoraanic silts, rock flour, dayey silts with sl�ght
� �o SILTS AND CLAYS M� p�ast�city. _ _ _ _ __
� �o
� � CL Inorganic clays of low to medium piasticity; (lean cizy;.
E o � Liquid fimit is less than 50°0
� o z•� , QL Organic silts and organic clays cf low plas'icity.
Z � � � — — - -
Q c� � (�/�H Inorganic silts, elastic.
� `° � �' SILTS AND CLAYS
w � � CH Inorganic clays of high plasticity. f2t clays.
Z � N ' Liquid lim�t is oreater than 50%
lL Q{-� Organic clays of high plasticity.
HIGHLY ORGANIC SOILS PT �eat.
DEFiNITlON OF TER(�1S AND SYMBOLS
c� Standard Penetration
� Densit � Resistance in Blows/Foot T 2" OUTSlDE DIA��IETER SF�IT
w —�_ i SPOON SAMPLER
J
0 Very loose �-4 �- 2.4" INSIDE DfAMETER RifJG SA��IPL�R
Loose 4-10 I � OR SHELBY TUBE SAP�1PLER
w ��4eaium dense 10-30
� Dense 30-50 � 1 �rJATER LEVEL (DATEj
v Very dense >50
Tr TORVANE READINGS, tsf
Standard Penetra?ion Pp PENETROMETER READING, tsf
� Consistency Resistance in Blows/Foot
w DD DRY DENSITY, pounds per cubic fo�t
� Very soft 0-2 LL UQUlD UMIT,
w Soft 2_q Gercent
= Medium stiff 4-8 P) PIASTIC INDEX
C Stiff 8-16
�% N STANDARD PENETRATION, blo��vs per foct
Very stiff 16-32
Hard >32
� , Terra UNIFIED SOIL CLASSIFICATION SYSTEP��1
� � � � Associates It1C. CEDAR RIVER CORPORATE PARK
�,>� � RENTON, WASHINGTON
Consultants in Gectechnical Encineering
Geo:oay and
Environmenial Eartr,s��e,��es Proj. No. T-5996 Date DEC 2006 , Figure A-1
LOG OF TEST PIT NO. 1 FIGURE A-2
PROJECT NANIE: Cedar Ri�2f Co;orate FarF, PROJ. NO: T-599b LOGGED BY: D?L
LOCATION: �{enlon. GNashi�qton SURFACE CONDS: �3rush APPROX.ELEV: NiA
DATE LOGGED: Novembe� �.2006 DEPTH TO GROUNDV��ATER: 14 5 Feet DEPTH TO CAVING: N;A
�
m
o ~
z
V ' i z
2 � GESCRIPTION CONSISTENCYi a REM1IARKS
G � ' RELATiVE DENSITY �- �
� � �
o � r I �
0
a
FILL aray tc brc•.vr s�ty sand,roots,some asphalt rub�le, Loose to
Itra�e grzve� fi�e ora�ned, moist. M19edium Dense � 6.2
' i
25.3
$� FI�L biue g�ay clayey sflt with weatnered bedrock�ieces hle�ium Stiff
� l0 3 feet in slze,old roois,sticks,wet.
; to S:iff
-� �i
I f I i
�
�
�
Browr.organic SILT to�iberous PEAT,sticks,weL ('T) Soft
i
� ; '
ic
Gray SiLT to clayey SILT,organic inclusions,moist!o i P�lediurr Stif�
wet. (ML) i to S�iff 43.7
�
i
I �
I 34 A
! Gray silty tc clean SAND,fine grained,wet. ;SMlSP) � Medium De�se
i �
_
15-1
Test pit terminateJ at 14.5 feet. � I
I Moderate grourdwater seepage observed at 14.5 feet. t i i
�
I
t �
�
I
� � �
� �
2,J-� t
b, �„ Terra
NO'E: -hs subs��iace irformat;on pertai�s cn y te ihis test pil Iccation and shv�ld r� /4SSOCIat@S� �11C.
not be inlerpreled as being indicative of of��er locations at the site. Consultants ir�Geotechnical Engineering
Geclogy and
Envircnmenta:Ear.h Scier.ces
LOG OF TEST PIT NO. 2 FIGURE A-3
PROJECT NAME: Cedar River Corporate �ark PROJ.N0: T-599b LOGGED BY: DPL
LOCATION: Renton G�r'ash�nr,7ton SURFACE CONDS: Rrusn APPROX. ELEV N-A
DATE LOGGED: No;�ember ". 2006 DEPTH TO GROUNDWATER: 14 Feet DEPTH TO CAVWG: NiA
� a
0
� �
z
LL � DESCRIPTION CONSISTENCY,� i e a REMARKS
� ' a RELATIVE DENSITY � 3 �
o I Q � Y
� a
a
� F!L�:gray to brown silty sand,roots,tr�ce gra�•�el,fine Locse to
�
� grained,moist. P,Aedium Oense 11.6
i
1
5 �
19.0 �
FILL qray brewn to blue gray silty sand to sandy siit, Medium Stiff
weathered bedrock pieces below 7 feet. moisf to wet.
tc Siiff
I
!
I
Srown organ:c SIL7 to fiberous PEAT,wei. (pT) Soft 152.2�I
77 0 �
1G
;
Gray dayey SIL7,organ,c irclusions,wet. (��tUCL) Medium 5tiff 55.9 ;
�
i
Gray silty SAND,fir,e graired,wet. (S�JIj tsediu:� Gense
_
- 28.7
15 Test pit termir,ated at 94.5 feet.
fJoderate groundwater seepage observed at 1G feel.
2-inch slotted PVC standpipe instailed.
i
7
i
� � �
�o �
,
,�,,.-.�., Terra
���'��
NO'E. This subsurface lnformallon perlains only lo this test pit location anc should Associates, �nC.
not be interpreled as bei�g indicative of other iocations a;Ihe site. �onsultants in Geotechnical Engineering
Geology and
Envhonme�ta'Ea�th Sciences
LOG OF TEST PIT NO. 3 FIGURE A-4
PROJECT NAME: Cedar River Cor�rate Park PROJ.NO: T-5996 LOGGED BY: D�L
LOCATION: Renton. bl�ashin�tor SURFACE CONDS: Brush APPROX.ELEV: _r;(,q
DATE LOGGED: November 1.20ub DEPTH TO GROUNDWATER: N%A DEPTH TO CAVING: _IyrA
� I LL
� N
� � H
Z
"" w CONSISTENCYi ^ W
DESCRI?TION I : d ' REMARKS
� d i RELATf�E DENSITY � �
I w
� �
Y
jl I ! a
�
i
i
� I I
� i
i i FfLL:gray brown to brown silty sand with grave,,rocis, 9"4 j
—� ' some sma�l sticks,fine orained,moist. �oose to I
,
'� I j � Medium Dense �
I� ; � ,'
i
; � i
�,I {
i
I `
i
;
FI�L:reddisn-brown tc b�ue gray ciayey sandy silt with 25.6
�� wea'.hered bedrock pieces,small to meCium larae pieces
j �� of bedrock,wet. Medium Stiff
I�I ! to Siiff
�
�
1� Brown organic SILT io fiberous PEAT,small sticks,wet. 189.5
(PT) Soft
�, � ,
, I
� Light gr2yish-brown clayey SILT,orga�ic�, weL (MUCL) �� t�ledium S!iff 106.3
;
' I
Test pit terminated at 13 feet.
No^yroundwater seepage obse!veC. .
I li
�
I
15;,
Terra
, NCTE 'nis subsur�ace informa:ion peAains enly to this tes�.pit locztic^,and s�ouid � ,�;:� � Assoeiates, �I1C.
'I not be interpreted as berng indicative of other iocations at t�e si;e Consuliants in Geote:hnical Engineenng
, Geolocy and
I , En�ironmental EartF Sciences
i
II
L�G OF TEST PIT NO. 4 FIGURE A-5
PROJECT NAME: Cedar River Co�orate Park PROJ. NO: T-5996 LOGGED BY: �FL __
LOCATION: Renton. b't�ashinqton SURFACE CONDS: Brush APPROX.ELEV: fJlA
DATE LOGGED: November 1.2006 DEPTH TO GROUNDWATER: NiA DEPTH TO CAVING: NiA
LL �
0 I ~ �`
~ Z 1
.LL.. Z
x � DESCRIPTION CONSlSTENCYI e pW, � REMARKS
a � RELATIVE DENSITY W
O uQi 3 I U
� O
a
(6 inches brown organic Si�TJROOTS)
FILL:brown silty sand w�th gravel to sandy s:lt with broken Loose to I 4.2
up bedrock,fine grained,mcist. Medium Dense
i
�
5
FILL:brown to lighi brown sandy clayey siit with broken up 1� �
becrock p eces, �ots of bedrock pieces to 4 feet;n size,
moist. Medium Stiff
to Stiff
I �
I �
10 1'11.2�
Brown organic SILT to fi5e�ous PEAT,small sticks and
smal logs,weL (PT)
i Soft 100.8
�
� 149.1
Light gray/clayey SILT,crganic inclusions,wet. (ti4L) �
Pledium StiH 48.8
Test pit terminated at 14 feet.
15 No groundwater seepage observed.
i
�
J
Zn �
� _� ,� Terra
NOTE This subsorface ntormztior perlains ooly te this tesl pit locallon anc should � Associates, �f1C.
not be interpreted as being indicative of otner locations at the sile. Consullants in Geolechnical Ergineering
Geoiogy and
Environmental Eart��Sciences
LOG OF TEST PIT NO. 5 FIGURE A-6
PROJECT NAME: Cedar River Comorate Park PROJ. NO: T-5�96 LOGGED BY: DPL
LOCATION: Renton.L1�ashin�ton SURFACE CONDS: Brus� APPROX. ELEV- N�A
DATE LOGGED: �lovember 1.20��6 DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: NiA
i ! �
� �
� Z I i
� W I CONSISTENCYi I ^ I w
F ; � DESGRIPTION e a REMARKS
I RELATIVE DENSITY
w j E ! � I w
0 � h Y
j I O
a i
� (6 i�cr�es black organic SILTrROGTSj
�{ FILL:brown to grayish-b�own sandy sii!with grcvel,a few
J large boulders,broken bedroc�:pieces with depth te 1.5 Loose to 20.4
feet in size,wet. i Medium Dense
i ;
�
1 �
� 1
� �
5� ,
18,4
� FILL:blue sandy clayey silt with bedrock pieces,small to
� very large sizes,occasional wood tc small logs,wet.
Nledium Slif
� te Stiff
� ,,
�
_ '
_ 71 7
�oJ
; Brown organic SILT to fiberous PEAT,some sticks to Soft
� smail logs,weL (PT)
j
�
i !
� i
� �
i
Light gray clayey SI'_T with organics,wei. (ML) Medium Stiff 76.6 �
7
Test pii terminaled at 14 feef.
15 � Slioht groundwater seepage observed at 9 feet.
I
�
20
Terra
N��TE: '�is su�s�rface �lormaficn perta-r.s only to;his tes•.pit loca:ien anc shccttl � Assoeiates, (f1C.
not be irle•preted a;beirg iodicati��e c`other locat;ons a;!he s';e I Consultanls i�Gectechnical Engineer ng
' Geology and
iEr.�ironmental Earth Sciences
LOG OF TEST PIT NO. 6 FIGURE a-�
PROJECT NAME: Cedar River Cornorate Park PROJ.NO: T-bq96 LOGGED 8Y: DPL
LOCAT�ON: Renton.VJ2shin��cn SURFACE CONDS: BruGh APPROX. ELEV: NrA
DATE�OGGED: Novemher 1. 2GC6 DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: N,q
LL
� I "-
�y Z Z
_ � i DESCRIPTION CONSISTENCY,' e a RE�.1ARKS
r a RELATIVE DENSITY -- F
W ' Q � Y
G ; VJ U
i I O I
i �
i i
i FILL gray siliy s2n�wi;h grcvel,fire grained,some
�V debris, moist. ��=�sp � �
�
7
�
� FILL:brown to gray sandy dayey silt w;th bedrock pieces
to 2 ieet ir size,sticks, moist. Medium Stiff 15.2
5
�
FILL biue clayey silt v.�itn small to larqe bedrock pieces, p.qedium StiH j
small logs,moist ta wet.
to Stif` i i.5
_
1C
86.3
6rown organic SiLT to fiberous PEAT,wet. (PTl Scft
257.1
I
i
! Gray clayey SILT,orgznics,wet. Medium Stiff
a
�� ' i� Test pit terminatec at 14 feet.
Heavy groundwater seepage observed ai 9 feet.
�
2C I
., Terra �
NCTE: Th.is subsurface iniorr^ation pertafns only to this test pii 1oc21ion and should Assoeiates, �11C.
not be interpreied as being indicative of other locations at lhe siie. � Consul,anis in Geatechnical Engineering
i Geology and
Envirormemal=_arth Sciences
LOG OF TEST PIT NO. 7 FIGURE A-fi
PROJECT NAME: Cedar River Cor,orate Park PROJ.NO: T-59°6 LOGGED BY: G�L
LOCATION: Renton. Vvashington SURFACE CONDS: Brush APPROX.ELEV: N!A
DATE LOGGED: Nevember 1.2006 DEP7H TO GROUNDWATER: 10 Feet DEPTH TO CAVING: NiA I
� ` II
w
j v �
O
� Z Z I
� CONSISTENCY.� ^ w
DESCRIPTION : I a REMARKS
r � RELATIVE DENSITY -- �
� y 3 I Y
U
O
a
� (o inch25 b'own organic S:LTI i
�
i
'I FILL: brown sandy silt with gravel,lots of weathered , �
! bedrock pieces to cobble size,old roots,st�cks, mois' i �
j 15.6
i
- Medium St;ff
I to Stiff
�
G �
V I �i
�
i
�
i
I
FILL:reddish-brown to blue sandy silt to clayey silt,large
wealhered bedrock pieces,moist to wet. Mediurr Stiff �
, to Stiff
= 1u,1 � 45.0 I
i
Bro�v�organic S�LT to fiberous PEAT,sticks,smal!logs, i
wet. (PT) Soft 112.0 1
�
i
I Blue silty SAND fine grained,wet (S�dj hledium Dense 25.7
Test pit terminated at'13 fee�.
Slight to moderate groundwater seepage observed at 10
feet. I
,i5 � j
Terra
NGTE This subscrtace in`orrnalon pe�lains or.ly;o this lest pit I�catie^and she�l2 � Associates, �I1C.
not be in;erpreted as being indicabve of other locaiions at the site Con=_�ilants ir Geotechn�cai En�'neerin�
Geoloay arC
En:ironmen;al�arth Sciences
LOG �F TEST PIT NO. 8 FIGURE A-�
PROJECT NAME: Ced2r R�ver Como�ate Park PROJ. NO: T-5°96 LOGGED BY: CPL
LOCATION: Renton VUashin9ton SURFACE CONDS: Brush APPROX ELEV� N;A
DATE LOGGED: November 1, 2!�06 DEPTH TO GROUNDWATER: 10 Feet DEPTH 70 CAVING: fJlr^,
4
v;
O "
` Z i Z
^ I W CONSISTENCY; —
x I � DESCRIPTION : i a REMARKS
F a RELATIVE DENSITY �
LL ' Q � y
� � � � V
� ' �
(6 inches brown organic SILT)
i
FI�L brown sanCy silt wi,h gravel and weathered bedreck � ; �
I. pieces, roots,wet
Medium St;ft �
i to Stifi 18.1
�
i
I �
� !
' I
�
�
2C.3
F,LL�blae clayey siit with weafhe�ed bedrock pieces, Med,um Stif�
some pieces fo 3 feet in sizes, moist.
to Stiff �
I
= 1D
i
i as.a ,
� �
� i
� Brown or�anic SILT t�fiberous PEAT,roots,sticks,logs, Soft
thin clay seems,wet. (°T) I
! !
� I
� '
S 03.4 I
Blue silty clayey SAND.fine grained,wet. (S��1;��1Lj ; �
� Medium�ense 48.1 ;
�,�
i
' Test pit terminated at 15 feet.
� Slight groundwater seepage obsen�ed at 10 feet.
�
�
�
�
�
I �
2�� I i
Terra
h'OTE. This subsurface informalion,�erta�ns only lo this iest pil loca-icn ar�d should Associates, �fIC.
not be inierpreted as being indicalive of cthe�locations at the si'e Consultar.is in Geotechn�cal Engineenng
Geot�gy and
En��ironmeniai Earth Sciences
SIEVE ANALYSIS ITYDROMETER ANALYSIS '
SIZE OF OPENING IN INCHES NUMBER OF MESH PER INCH,US STANDARD GRniN 517F IN MM
''' �''�� "' �''� � N A O� O O O O O O � O O p� o o O
N 01 A C. IJ N A� A Oo IJ � ? A O . O O O O O � A W N � W � A W N
�0� �
:f,
1"
O� � 9� ��
(T1 `� �
7 d N � 80 2�
O N
(DO +n\I � �D �
��o o �� � 70 30 �7
m� �� m -- m
�n,�.('� z Z
' �(/� -� 60 40 n
� rn� �1 _ O
�
� �o ..�. D
Z
N m � ,��j 50 50 m
� � U7 _ _ _— �7
`° ' � W
m 40 60 �
� _ m
�
p -� 30 70 �
Z �
� m _
-I 0 20 80
c�o I'�T7'� � --_�.. _ _
°' �� y �o --- — - --- — so
o Omz
n� Z� � _ _. ._- -----
cn 0 100
� C� N W N �� � d W N -� OD � A W N "� m O� .A W N � O O O 6 C7 O. . . .
C O O O� O 0 O O O OD � A W N � O O O O O O
n �� D GRAIN SIZE IN MILLIMETERS °' °i A' w ^' -'
N � z COARSE FINE COARSE MEDIUM FINE
� �� � COBBLES FINES
GRAVGL___ __ SAND
�� � — -
']'i �rn � ExploraHon Depth Moisture
Key USCS Description I_l PI
�� � Number (Tt.) Content(°/)
cD
D � � TP-1 1.5 SP SAND F� �
0
� TP-1 13.0 SM silty SAND �q 2
-- --- --- -- _ _ �
S� V
E E ANALYSIS hIYDROMETER ANALYSIS
S17_E OF OPENING IN INCHES NUMBER OF MESH PER INCH,US STANDARD GRAIN SIZE IN MM
-i� W Ut � W -+ � N A Q1 O N O O O p� p �O O
N QI A W N N A� A Qo N OD A A O O O O O O � A W N � (p � A (,� N �
���
�f 0
_
�
"D
o ,,,,� so i o
�
� �
�N
� � N -� ao
� � �
° `� O S� 20
�c�s
�o �C7 v
�° o "� m 70 �
�°-��'� m� m _ 30 ,Zmj
� � n
,Q=.� Z m
z
� �(/� -I 60 �
� m.. � 40 n
�o � Z D
� �. �
� � � rn
N � � 50 �
� (� pp 50 m
cQ • � �7
m 40 60 �
� m
v =
o -a 30 �
` � 70 -�i
o m
� o - -
� m� � 20 _ _— ao
�' O� z t o - _
- _ .. so
o m
� z� � 0 _ -- -
�oo
a �C� N O O O O O O O O �p 0D � A W N � Oo � A <.� N � O�o rn A O O O O O O O C7 O
n �� D � � � GRAIN SIZE IN MILLIMETERS ! W � A w N �
N
� Z� D COBBLES COARSE FINE COARSE MEDIUM FINE FINES
��J � � __ GRAVEL SAND �
�� �
�'! O m � Exploration Depth
� -� Key USCS Description Moisture LL PL
c D Number (R.) Content(%)
cD �
D � � TP-2 2.0 SM-SP SAND with gravel and silt ��,�
_'�
� TP-2 14 0 SP SAND
29.5
APPE'.vllI?� B
TEST PIT LOGS B�' OTHERS
Ex.p'ora�i���n No. 1
G-i .5 Erown Silty Sar�d (SN,i imccerate�y dense, damp) ( rill )
1, 5-8,� Erow� to B ? ue Gray Siltwith grave' , cobbles & bo�lders
('�!L) w;tt� c::cas��na i p�ece of wood (i;iod�r�a�21 y der,sr_ wet)
� (�Filii rock is granular
�
4
� �ce�aye at �,5'.
� E„5-13. 5 Sro�,r Gr�jan�c �il t i0[_i ari�« �i-ay�n�nts of de;.:xyed �rooC �
aeye�atior tc� 6" si_e.
1�_ �-1b.5 Gray Si 1 ty ,=ine Sand (S!�^.j {,ocle��ste?y .��ns� wet).
�rades fine and less silt��, i
Comple tec 3;2�;85
Sar�.ple Jepth ( fti Nleisture �or;tert %
1?.5" 14Q
Expl crati cn tJo. 2
0-5.5 Mixed Brcwn Silt and Gravel (M.L-GM) with angular �obbies
and boulders, tfill )
� Change to bl ue at 2.5` and wi th rock to 200 1 bs.
Caving at 4.5 ' .
Seepage at 6' . --
0 5.5-10 Cobbl es and Boulders wi th Si 1 t,
, z rock to 800 lbs, at 7'
o Some woody debris at 8' _
0
� 10-1�. 5 Wood debris, organic silt and vegetation. Terrnir�ated due
to boulders and heavy caving
Completed 3J28J75
Sample Depth (ft) Moisture Ccntent %
0 10' 262
c
I ;
W NOTES:
>
a 1) Depths in feet.
2) Fie7d eng�neer: Roger Lowe�
3) Excavation using a EXPLORATION LOGS
Ford 75_5 backhoe
ATLAS GEOTECHNI�AL PROPOSED OFFIGE/WAREHOUSE
4) Moi sture content i s a ENGINEERING INC.
> percentagE of tt�e sample PR0,3ECT, RENTION, WA
'� d ry we i gh t..
z
3
` PLATE 2
�
c �t .._.�. �
....��.,.._.��..._._vV...�,..4.........,�.��,...�.�....�,.�,,.�4.���,,.�.�.�...�.-..,_,.d�....a�.�.�w - --....,.�._,�,-.__.,.........�-=���w_...�._,.�,,.�-�
E
Expioratior� I�a. � �
�-1�. � 8rcaln Graveliy, Ccbbi:✓ Silt (�^L) ( fiiil
�hange to blue-gray calcr at 2.5'
Hea��y see�G ce a t 7` �
'�vater 'e+�e1s 8. 25 ' 3!28r`75
Test pi t not open i org enouch ���r wa ier i e �-e 1 te
st�bilize.
� 1G. 5-15.5 �r�wn Grganic � z7t, ar�d Si1t}� °eat (ffH/P�} irrod� r�atel }�
seft, moist} (deca,�ed ,�eg�tation',
a
i5.5-1? Gray Silt with Qrgaric Debris (M�1'P1Hj (moderaiely �irm,
wet? .
1,'-i8 DaYk Gray Fire Silty Sand lSM) (rr�od2l�ately d�nse, wet)
Com�,�leted 3128/85
Sample Gepth (ft) �oisturE Content �
14 21E I
i
I
l
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m _
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,
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,
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EXPi.ORATION LO�S
ATLAS GEOTECHNICAL ` P�opos�� oFFicE/wAR��ou�� :
Y
EN:GINEE�ING 1NC ;;,, , _��o;����,. RENTaN, wA �
� _
Z . .
3
; PLATE 3
0
...,.�____._,.�..., .___--�- .-._--�
Expl orz�i o^ tdo. 4
0-:;.5 Brown Sandy Si 1 t lP-iL j with rocks 8 cobb i es (moderatly
dense, damp filll
3.5-�.� 61ue Gravel and Ccbbles (moderately dense, saturated)
�fiil ;
1•iater at 3.5 teet, heavy f iow.
Large boulders, 20C� lb+ at h'
R.5-9 �rown Oryanic Si ? t { ��iL ) (modera tely soft, mci st)
{ topsoil ) .
9-15 Gradationai chan�e 1:o Alternating Browr, Organic J1 � t anc]
Pea� (NiH/PT}, peat 1 ayers to 8" tt�ick.
1�-1;.� Cark Gray Silty Sand (SM) (Mo�4erately dense, wet)
{6" thi ck si 1 t 1 ayer Gt 16,�).
Completed 3/28/85
Samrle llepth ( Ft) J•ioistu��e Con�:ent �%)
8. 5 120
10 320
11 153
�6.5 4i
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z
m
;
0
�
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�
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i I
�..
m
� o
' W
3
' W
I �
W
�
�
EXPLORATION LOGS
� ATLAS GEOTECHNIC�� PROPGSED G�FICE/WAREHOUSE
y ENGiNEERiNG lNC. pROJECT, RENTON, WA
0
Z _ .
� 1 PLATE 4
I �
ti
�
ExF?oration No. 5
:�-Q Ercwn Sandy �ra��eily Silt {MLl ;r�ode��ately dense, ��kc;st) �
(fill ) �
�
;�'ith rcck frscr�er.ts at 3 feet
�
�
�����: tC �n1L�:J � !)S ::ia��l Z �011� :_1L??`?;l'�: c� �.� F�2t_
l}iL�Y' dt �
1 G--?2 �r0?�tl d��] i;rav jl�'(; (��L� W1 ��l �.�,�Qdl'l.i( fl'aQ��ll'.'�1L5
rl` ^� r�^a�i h.^n r�i J t1t C a n r� f S G) �,;�j f I� , �.Y�f� C)F S� � �T: �tk:`l�C'`"-
at��ly densc, ��•ret)
12-17 Darh Gray f'e`iu;. Sa�d tSF } wi �h a trace ��� si I �
(mo;erately cen�e, wet? .
�r�cludes ���y Si7t layers (P1L) {n�derately `rir7�, �a=C; arC
tr�ces of or,,aric !�atQrial belo�a 15 �e.et.
E;;G1^r�ation P:o. 5
C-i 6t'o�tin Sancy and Gra�elly Sil � �.ML) w�t� rock fY���mCn'ts '
r
(rr,oderately firm, ncist} (fili }
r Rocky ai. 4' , j
, �
II �
' ( � 7-8 Broken rock (fili ). ?
i ;
�
; R-9 Organic material at 8' . �
I ,
0 9-1C, 5 5rown Peat (PT) (moderately firm, saturated) �f�r�L Siit �
I (ML} (moderately firm, saturated) ,
� ,
�
, � �= 1G.5-12 Brown ?eat (PT;� (moderately firs.n, saturated) -
� �
, ,
' ! i2-17 Gray Silt (ML} (moderately firm, saturated; '
- i with occasional layers of peat at 13.5'.
; Completed 3J28/85
, �
� ca�p?e Depth ifti t;ors?ure Content � �
� fs 236 t
3 ff
� 8
o� �
- (
� E1�.?�ORFT:'I�0l� '�.O.GS �
� � ATLAS GEOTECHf�lCAL °��P���� �����E/WAREHOUst , �
� ENGINEE�i�NG iIV�. PROJECT, .���;�r�N, wA �
� . �
z . �
� �LATE 5 {
o .__W�.�__ __._. �� ._�-____.��...._____�_�._„�..— - ;�
- - --�
Explc�ra:ion PJo. 7
0-3. 5 Erowr P'�ed- u� S�nu l�F! wi th si 1 t �;mc�deratel �� der.se, da�^F;
(filll
=. �-i L�rc4ti�n �i � ty Gravel (�"•ti:' !�ense dampi
Change to bl ue at C�. IJater *lowing �n at 5'
3
I —� L' IU�t' P�.ULKV � I I I � '- - - � - �' ! �� -- - •
lucii�c �� �iai�� � y; il: - �
� i.::.7'i lii . :y��.'.T.-? .`J;l :;�.. � L
� �-� �rn,.,n IlrnariC Sllt (��1H; {mc:�era�elv f;rrr, saturate�; �
1 4-1�.� t`�1"'dC�dl,l0(Id � �(lal'.G� 'tC l�f-O�.'�1 ?Cc.i. �F'T� �%'0.'�ic1'nt� I� ri �"Ti� �
saiura�ec; �
�'. 5-?8 GGrk Biue uray t1e�i�n Sard ;�=-S�'�) with si't
Complet2d 3,�28/85
Sar���le Depth ( ftl P1o�stare Content :�
8 ^�
c�
Explorati�n ho, 8
0-2.5 6rown �il �y Sard (SMI with rccts (moderately cense, moist)
(r"ill )
Asphalt chunk fr�m 2. 5 to 3.5'
� 2.5-3.5 fllue-Gray Cravelly Silt (�;L) with rock frag;nent.s ldense
�� moist) (fill }
3, �-9 Brown silt (M4) with occasional rocks and fragments of
o vegetati�n. ( fill )
z
m 9-9.5 Black Grganic Mat
0
� ` 9,5-14.5 Brown Peat (PT)
5eeaage at 12` grades with silt beiow 12.
i4,5-?e. 5 Grada��onal change to Gray Silt (ML) ►:�ith so�ne Or��:'.�C
, �ebris. (mod2rately dense, saturated)
I � Trace of sand at i6,5. .
' 4 Terminated at 15.5' due to obstructions that limited
o excavaticn. �
3I Co�npleted 3/28/85
� W
�
u
oc
i
EXPLORr1TI0h LOGS
ATLAS GEOTECHNICAL p��pOSED OFFICE/WAR�HOUSE
�
ENGINEERING IUC, pROJECT, �tNTON, WA
0
z
i 3
� PLATE 6
o �
Fx��lc�ati�n ?;o. 9
J_3 6r�wn Sa-!��y �;i t i A',L 1 ; ~i 1 1 )
3-4. 5 B 7 ue R�cky Fi 1 1 (very derse; hai,d di yg�ng.
4. 5-9 Si 1 ty Sandy Gravel (GA1) f very dense, �ti�et) ; f` 1 1 ?
� K�..tK�:` :i:[. :1.7 ,�� I LiC�a`.`, i... .. �'`_ c:-{• �
r-,��� S
; �'C�.y , .�'.3j i:i j i.;�,' ;ij �
b
� ',��)Oi1 vCi�l�i � �i3O O C�i ciiit LcI" �
�
� ?-14. 5 6; o;1r ^c�� (^T,1 �.� ,th �il � (,:�p�'�;�;.?`v ,`ir�;,, S�tt:� =t_dl g
Y
:�+.5-17 �radaticral chGr�ye io i��iixed �ea� ar;d Gray �i ii iPi% Ii;1
(firm saturated)
1�-Id ',il"dj �3 � _ �'•�-;'� 1•:1 �1' _ "y'ef' . `;"3(�f�Zl"i�S. �,i���G'�`'��2�y fil'i'1,
' sa�ura ted 1�
' Com�leted 3i�_,/%�5
Sanrl e Dep�h i�t; Moi s�ure �onte�t k
_o ic�
, 11 ;85
12.5 193
'7 44
° I
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�
EY.PLORATION LOGS
1 ATLAS GEOTECHNlCAL PROPOSED OFFICEiblhREHOUS�
ENGINEERING INC. PROJECT, AENTGN, WA
_ > � .
m
Z
3
� FLATE 7
0
EXC�C�rd`1C N0. iv
u-8 firow�: Sa�cy Gravelly Si1t (1•iL) ider�e, rroist� rocks to 18°
(fill )
Char�ge tc bl ue �t o'
Seepage and sone ca•��ing at c'
� � -�: .-,, }:v i -� i l �,. :>i� r
;
=Xp I�'"dL�On r i oo;?eil, �ev�=r � Ccv i fiG
� `rLSc�d�,CIl .,.; _. �
!
� J-r', c �: J r,r�c ^r�v�,l , , rmn��A� .i.??v �'iF!1S(' S3�UYdLCdi �
� �
� �.5-l�i.� �?'own Feai e,r„i �i 1 i (N�i 'r�h) r
Ctiunk cf partiall}- decayed wood dt 12.� �
14.5-16 G>�ay Fine Gravel (GP) (moderately dense, saturated) �
1b-17.5 P�lixed Peat and Silt with Feat (PT/�1H;
17. 5-18 Gark Gray Si l ty Sane ;S�i) (modera�ely dense, �•�eti
Co�npleted 3I29/85 �
Sample Dep;;h ( ftj t•loisture Content �
10 147
11 133
'I
;
� j
o iz
� m I
i� O i
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1 I
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i
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m
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W j
W
. p[
� � �� EXPLORATION LOGS �
ATLAS GEOTECHN;CAL PROPOSED OFFICE/WP,REHOI:SE �
� ENGINEERING INC. pROJECT, RENTOh, wA ;
i
z i
� ` PLATE g
� �
0
I
I�
Exploraticn N�. 11 I
u-1 .5 Brovr� San�y �ra��el ly Silt �;N�L ;� (��'�cderately ��+e�se , damp;
t' fil� )
�. 5-;. 5 Rocl:v F�1 ' �.'th Silt
Color chan�e to blue at 4.5'
S
� ;
� . S-U ' 1�9GK CY'a�+•-�1C �ii�ii:�i' ��� . �
� _-_� �f'04�11 �iY'Gall i _ J I I � t �i . �: � �:1 .,, , _ . . _ ,..� _c, � � . � � I"C', !�
� .�amn �-.i�t�� ' !
� . ..�. �..✓ : _; �
� ��1-11 �.r'd(1�12.1JIltl � l.El�7!iG� �:i 'vi��Yill i'tcL t^ 11 i,�.•i:c!".. i.�. , ,� fi �� , � �
F
ff101 S�i
1_-13, 5 Gray Si 1 t lI�L-t�1!�'? {w? th fragmenis of organi c mat2r;a 1 �
(.�odera�el y =�:rm, rroi s t) ;
i3. 5-14. 5 Dark Gray �and ISPi with some s� lt (moderately cense, �
52 tu''c ted?
�orple.ted 3;29/85
Sa�n�le Depth (ft; Moisture Ccr,tent % _
R.5 46
1C.5 258
�
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EXPL4Ra,TION ?OGS
iATLAS GEOTECHNICAL .PPOPosFo orFlcE/waREhouse '
> ENGItiEERI�;G INC. FRo�Ec�, REPJTON , �,;
m
z
3
; � PLATE 9
I � I
�xpler�tion Plc. 12
0-3. � ?rown Sandy Si 1 = i^?L1 (mode�ately cense, dampi (fi 1 1 1
wi th som2 rocks at 2'
�. 5-8 Br�wn ard 81ue w'ih Orange Laye�-s, Sand�� Grat�elly C��bbly
Silt (�IL; (moderately dense, rrcist) ;f=11 ) �
;
I _ '
�-R_ 5 ��C�y tl�� �?a3Vy f �0'�l 0T �v���r [
t !
� Rock �0 2 ' x ? 1/2' ;
i � �_ V,� _�. :'=_ ` ... .._ !
l� J �,I� .: �,::A VI( 1 I4 y
�
� p
9-10. 5 d�oti�m Org�nic �i I t (i�1H) (e�oeera�ely �2nse, s_i._;i��i2�'r
i�. 5-11.5 Gray silt (h"L) (modcrateiy ��ns�, saturated; �
1_� . 5-i5 Gray M�edi�am Sand (SP) ;noderately derse, s�tur-ate�) �
15-15.5 GrGy Silt (h1�) (mederately �ense, saturctedl
i�, ..-;o. _ Dark Gray San� (�F! (P10-�e�a`e�;;� dense, saturated;� I
�om�leted 3!29!�5
; Ex:�l crati or� tdc. A
; 0-6. 5 Browr P1edium Sand ;c.p) r�ede�ai:ely dense - loose, moist)
(filli (caving)
Vegetation mat at 5.5,
�
, z b.5-9.0 Brown Peat (PT)
m
� ° Termination @ 9' due to severe cavinG
I Completed 3/29/d5
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m
' 3 � !
, >
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OC
�
�
�
� EXFLORATION LOGS
� ATLAS GEOTECHN':C/�L �ROPOSED OFFICE/WARtHOUS�
� ENGI�JLEAfNG lNC. ��o,.�Ecz, ��NToN, wa.
r
�
Z
3
' � ?!r,TE 10
I �
�
_ s TERRA ASSO�CI�TES, In�e
Consultants in Geotechnical En�ineering, GeuloFy
�od
[f1Vl'(1f1RlCtlld� td"Ill $C�c;�I1Ct'S
February 22,?007 �'
Project No.T-599b '
Mr. Mu�phy McCullough
TAREtAGOi`'
]�00 Second Avenue, Suite 3240
Seattle, Washington 98104
SuU�ect: Geotechnica]Report Addendum
Cedar Iti�er Corporate Park
Renton,Wasliington
Reference: Geotechnical Report,Cedar River Corporate Pa-k,Itenton, Washington,Project No. T-599b,
prepared by Ten�a Associates, Inc., dated December 7,200b
Dear Mr. McCuliough:
As �ve understand, design building elevations fo: the subjeci pro}ect have Ueen re4ised since completion of the
referenced geotechnieal report. The revised 'builaing elevadons�vitl require tl�e exisr,'ng site �rades be raised four
to five feet by piacement of fill material.
Raisi�i� site �rades as planned is geotechnically feasible and will actual[y eliminate the need to implement a �
surcharge pro��am to mirigate differential building settlements as recommended�� in the referenced report. .
Considering the thicimess of the fill material, it is also our opinion that stripping of ihe near-surface topsoil laye3� �
a�ill not ne necessary prior to G11 placement. We recommend that the site be cleared and grubbed with surface
vegetation sh•ipped and remo�ed; however, the ren�oval of die renv�►ant topsoil will not be necessary. We
recommcnd tl�at tlie surface be tilled and recompacted to a firm and sfable conditi�n prior to fill placernent. �
Placement of new fill material to aohie�•e revised construction ��rades will consotidate or compress the peat ar.d
so�t aIluvium that underlies the existing fil] at depths of eight to ten feet below current site grades. We
recommend that placement of the fill materiai be treated as a preload anci that the consolidation settZernents be
aliowed to occur prior to building construction. Tllis approach is similar to the surcltarge recommendations
presented ir. ±he referenced geotechnical repor� with the exception that the f±11 material must be p?aced and
cornpacted structurally to provide suitable support for buiIding foundations, floors,ana site paver.�ents. Estimzted �
total settlement under the weight of this four to f ve feet of fiil material falls in the range of faur to six inches with
time of consofidation extending for approximate�y three to four+veeks.
i 2525 Willows Road, Su�fe 101, Kirkland, 1Nashington 98034 � �
:t.;
Phone (425} II21-777'7 • Fax (425) 8Z�-4334 „_,i
N1r. Murphy McCullough
February 22, 2Q07
With site fill placed and compacted structuratly as recomrnended in the referenced geotechr.ica) report, suitable
support for siandard spread footing foundations would be provided using foundation design parameters as
outlined in Section 5.4 of tE�e geotechnical ceport. VI'ith the preload p;ogram implemented, estimated total
foundation settlement falls in the rar.ge of 1 to I % inclies�vith di.`f�renrial settlement of one-half to tlu�ee-quarters
inches.
Al] other�eotechnical en�ineering recommendations outlined ir. the referenced report not amended by this letter
continue t�remain ti�a:id for this project.
���e tiie trust the informati,ou �,rese�nted is sufficient to meet your current needs. Sliould you have any c�uestions or
�'
require ade�itional info�r Ie'se�� �
r��j a��'� �,�r �
Sincerely yours, ,;%c`� �'� a�; �.��� `
T� SSOC�� ' S, ��' � ::`� I
,'�� '��;�� � �
�� � -2z�' l �
� j,� , . '2
T}�eod�e J, Sche � ,�� �
3
P;incipal ` :g„ � ��
-�
cc: R4: J��T�'�,�i'�h�;3r�R , GO II
��-------.�.
Project i�To.T-5996
Page No. ii
APPENDIX F I
Wetland Analysis
We�l�nd Ar�alysls, S�rear� Classl�rca�ior� ar�d Shorelir�e Mas�er Prograr� Appllcablll�� repor�
�00 S. �60T"SZ'R���
Cedar RNer Corpor��e Park
Pm�ce1�:33'�O�OOZ85��0230�Q083
RE�(T0�l,Y�[AS}iI�GT01�
� �_
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N����,r�� -��":
r�,�r,`,�M G��':O�;q��
Tarragon Deye'opr��e:��
lOQO Se�on����e"����
Su��e 32�1
Sea��le.�lA G�1i�-
I'?11F�17�'.,j-Ni;l i��
Prepared b��:
CE�FST�BOT.�i�,
. `
�r���.s�
���� �����
������ �����
[ � Oa ) 8 � 8- 7776
�as@is�.cos+a
r�ece,nber 2l.?OQh
Tabie of con�en�s
��C(iiT1'E SuMNA.RY..-�-----��-----�-�.....................�-�-----�----...................._......_........._.....------------�-�--....................-�----�----�---------�--�---------------�---.....3
S�D�SC�IP9'!ON.......................................................�---._.............._........._._.._.._.....-------------------------�----------....-�--�--...----------�-------�-----�---------�------�---.3
:�1��liMiD DE!.I1��;P.TION..........._.._..........................................................................--�----------------------��---------------.............._......-----------------�----------..�
Gagefia�ion.---�-----�-�-----...............................�------�--�--�---._.........-�-----�----�-�-----....._.......--�---------...............- ---...�-�-----�-----�-�-�--�-�-�-�----�---�--.............4
So?'s-----�-�-�-�-�--�-�-----�-�--------------��-�-----�-�-�---�---�----�------�-�-�----�-�----�---�----�-��--------�-----�---�-----�--..._.._...._....-----�----�-�--�----------...--�-�------�-----....-�-�----......._........5
�ydn�]o9U---�-��-�-�-�-�-�---�--�-�-�----�--.._...---�---�---------�-�---�---��-----�----�----�---�-----�--�..............................�--�------�-�------------�-��----.._._........---�---------......_.........._......5
1�ETLAhiD CP.TEGORIZATI(IN..........................................................................................................�---------------............................-------------------�--�---�--�-�
'�lFT�MiD DE'.D�J:TION RESOLTS---------------------------_..-----�------��---------.........----------�-�------�-----........-------------....-------------------------------------------------------6
',,?ge�c�ior.....................�---�-----�--�--.._......._....---...._._......._..............-�------._........_...................--�-------...-�--�-�-�--�-�------�-�-------�--�---�---�----------�-�----------��----��---.i
-
,,nT s --------------�--�
��-
;�� ro.ogu.....................��-�-�-�-�---��-�-�-�--�-�-�---------�---�------..._......-�----�---�-�---._...--..................--�---------�-�-�-�-�----�-�--�---�---------��--�--�-�-�--�-��-�-----�--._...._..........
4i�T�AND DET�RMI.NA1i0N€CLHSSIFICI�TION._..................................................�-�----..........._.._................----------------------------------�---------------.._..._.._..8
u��and P...................................�---................_............................-�-�--------._......--�-----�--�-------�-----�-�-�-�----�-----��-�-�----�------��-�-�---......_........................._..._....8
4ie�'ar�d R................-------�-�------_._.....-�--��--�--.....-�----�------...._....-�-�--�----......._..._..---.......---�------�-�----�-�-----------------�--�-------�----�---........----------�-��-�---.9
STREA�'�UETER►�INA1TOh�Cl ASSI�?f,ATION--------------------------------�-�------�-----------........------�--�----..............---------------------�---�-------�----�----------------�------9
S}iORE'.,JdE MAS1'G�R PROCRAM._..--�---�--------��..........................................�----�--..........................----................--------------------._...._........._....._..._...__........9
R�GD�P.TORY IMPI��CAT1(INS----------------------�-----------�------....---..._...........__..._..---._....................--�-�--.._.......-----------------------�----------�----........-----.........9
6�e��lar�ds..............................�---.........._.........-�-----�------�--.........-� -----�---�-�---�-�-�-�-�--�-�--�---�-....-------....._.......................--�-�-�-------.......9
-�--�-�.................�------�
��.^eams.......................................................�---------��-�-�------...---�----�-----------...-�--��-�----�--�---�-�-�-�-�--�-�--�---------....--------�-��----�--�------...---�-�-�--._......_...._._]1
. _ , r,�.
,h��r�]rn��„�r.�rtia.,�.�.._......................... .- _ - - '�
- - - -.. ................._....._...___.....__.._.............._.... -
Page 2
Exec��nTe S�mQry
This report presents the findings of a wetland analysis, stream characterization and
applicability of Shoreline Conservancy provisions that «�as performed by VVPS on the �
Seelig Lind Avenue property. Two wetlands were identified, one located on the adjacent '�
propem� to the north and the other located along the south and east side of the subject
property, and the boundaries of the «-etland to the south and east as well as the southern
boundarv of the wetland to the north were delineated.
SY�e Jescr�p�Tor�
The 12.57-acre site, Parcels 3340400285 & 3023059083, is located between Lind Avenue
South and East Valley Road, south of SW 19�' Street in Renton, Vdashington. SW 21St '
Street is located to the north and SW 23`d Street to the south; ho«-ever, both of these
street ROVI%s have been abandoned (Figure 1, Vicinity Map). The site is currently
undeveloped. A fire station is located north of the northwest property corner (Parcel '
#3340400425), a commercial development is located to the east between the subject
parcel and the East Valley Road; and a gas line is located on the parcel to the south,
«�ithin the abandoned SW 23`d Street ROW (Parcel # 3023059083). The parcel is nearly
rectangular, with a "panhandle" at the northeast corner.
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Figt�e L-1'icini�y Map
� The site was filled prior to 1970 with from 7- to 10-feet of dense fill material. Scrubby
� trees and shrubs have since become established on the site. The southeast corner and a
�
� Page 3
�
narro�;- band around the entire site are forested. The interior of the site is mostly scrubby;
tree species have generally not reached 20 feet or greater. Two mapped wetlands nearly
surround the site; a large ���etland lies to the north and a smaller wetland wraps around the
east and south property boundary-. These wetlands have been included in numerous
previous inventories, including the City of Renton's Rivers, Streams & Wetlands
inventory. An unnamed tributary of Springbrook Creek is located on the adjacent parcel
to the south, south of the abandoned SW 23�d Street ROW.
Y�Ie�i.and Delir�ea�on
Site visits occurred on August 25, September 23, and November 7, 2004, wherein CBWE
examined the study area for indicators of wetlands. The study area of the investigation
included off-site areas since it was apparent that wetland buffers extend onto the subject
parcel. Wetlands were identified based on the presence of hydrophyrtic vegetation, hydric
soil, and wetland hydrology using the method outlined in the 1997 Washington State
Wetlafzds Identification and Delineation Manual (Washington State Manual), and
follow�ing City of Renton regulations. The "routine on-site determination method" was
used to make the wetlands determination. The routine method is used for areas equal to
or less than five acres in size, or for larger areas «�ith relatively homogeneous vegetative,
soil, and hydrologic properties.
During the study area evaluation, 12 detailed data points were located in distinct
representative vegetation units in order to characterize the wetland and non-wetland
communities. Field observations at each data point were compiled on preformatted
Wetland Data Sheets, labeled DP1 through DP12.
1�ege�a�ion
Vegetation was evaluated across the study area to determine the presence of hydrophyrtic
plant communities. Plant communities are considered hydroph��tic when more than 50
percent of the dominant species in the plant community have a wetland indicator status of
facultative (FAC+, FAC, & FAC-), facultative wetland (FACW+, FACW, & FACW-), or
obligate wetland (OBL), as listed in the 1'�'ational List of Plant Species That Occur in
Wetlands, Region 9 — Northwest (Reed, 1993 and 1988). The indicator codes for plant
species are noted in Table 1.
Dominant species were recorded as species comprising more than 20 percent of the plant
community in each stratum (tree, shrub, andlor herb layer).
TABLE l. PL.A'�1T INDICATOR CODES
� Indicator Code Frequency of Occurrence in
� �
Wetlands
' Obligate VUetland (OBL)—occur almost always in wetlands >99°�0 ��
Facultative Vv'etland(FACW*)—usually occur in wetlands 67-99%
Facultative (FAC*) — equally likely to occur in wetlands or i 34-66%
non-wetlands
Facultative Lpland(FACL*)—usually occur in non-wetlands � 1-34%
Page 4
Obligate Upland(UPL)—occur almost always in non-���etlands <l%
Not Listed (NL)—no indicator status i ---
* Note: FACW, FAC, and FACU also have + and—values to represent species near the wetter end of
the spectrum (+)and species near the drier end of the spectrum (-). i
SOIIS
Anaerobic (saturated) conditions cause soils to form certain characteristics that can be �
observed in the field. Hydric indicators include: the presence of a matrix chroma of 1 or
less in unmottled soil or 2 or less in mottled soil, gleyed soil, organic soils (peats and
mucks), and the accumulation of sulfidic material.
Soil pits were dug in each data point, using a shovel to depths of 16 to 18 inches below
ground surface (BGS). Soils textures were characterized using Natural Resources
Conservation Sen�ice protocol, and examined for hydric indicators as described by the
V�%ashington State Manual. Soil colors were identified using a Munsell soil color chart
(Kollmorgen Corporation, 1988). Depth of soil saturation was recorded for each data
point. VVetland Data Sheets are included in Appendix 1.
Several secondary data points were examined across the wetland/upland boundary in
order to determine the boundary line, although data forms «�ere not completed at the
secondary data points. The secondary data points w�ere used to examine similarities or
differences in soils betvveen major data points and to establish mapped soil unit
boundaries.
Hydrolog�r
At each data point, observations of direct and indirect wetland hydrology indicators were
evaluated and recorded. Under normal conditions, hydrologie indicators are used to
determine if the h}'drology is either currently present or can be inferred from the
guidelines provided in the Washington State Manual. These indicators include: recorded
data, visual observation of inundation or saturation, watermarks, drift lines, sediment
deposits, drainage patterns, local soil survey data, oxidized root channels, and water-
stained leaves.
�iET1�A�D CA'�GORIZATION
Wetlands identified within 100 feet of the site were categorized using the City of Renton
classification system. The city's classification system, (RMC 4-3-050 M. l.a., amended
on December 12, 2005) is as follows:
i. Category 1: Category 1 wetlands are wetlands which meet one or more of the
following criteria:
(a) The presence of species listed by Federal or State government as endangered
or threatened, or the presence of essential habitat for those species; and/or
(h) Wetlands having forry perce�nt (40%) to sixty pe�rcent (60°/a) permanent open
�vater (in dispersed patches or otherwise) with two (2) or more vege�tation classes;
and or
Paae �
(c) Wetlands equal to or greater than ten (10) acres in size and having three (3) or
more vegetation classes, one of which is open ���ater; and%'or
(d) The presence. of plant associations of infrequent occurrence; or at the
geographic limits of their occurrence; and�or
ii. Category 2: Category 2 wetlands are wetlands �;-hich meet one or more of the
follo�-ing criteria:
(a) Wetlands that are not Category 1 or 3 wetlands; and�`or
(b) Wetlands that have heron rookeries or osprey nests, but are not Category 1
��etlands; and,%or
(c) Wetlands of any size located at the headwaters of a watercourse, i.e., a wetland
with a perennial or seasonal outflow channel, but with no defined influent
channel, but are not Category 1 wetlands; and.ior
(d) Vl�'etlands having minimum existing evidence of human-related physical
alteration such as diking, ditching or channelization; and/or
iii. Category 3: Category 3 ��etlands are wetlands which meet one or more of the
following criteria: !
(a) Wetlands that are severely disturbed. Severely disturbed wetlands are wetlands
which meet the follo�in� criteria:
(1) Are characterized by hydrologic isolation, human-related hydrologic
alterations such as diking, ditching, channelization and�'or outict
modification; and
(2) Have soils alterations such as the presence of fill, soil removal and/'or
compaction of soils; and
(3) Ma�have altered vegetation.
(b) Wetlands that are newly emerging. Newly emerging wetlands are:
(1) Wetlands occurring on top of fill materials; and
(2) Characterized by emergent vegetation, low plant species richness and
used minimally by wildlife. These wetlands are generally found in the
areas such as the Green River Valley and Black River Drainage Basin.
(c) All other wetlands not classified as Category 1 or 2 such as smaller, high
quality wetlands.
�t�TLA,�D DE1�I�EATION RES�LTS
CBWE identified two wetlands within the study area. The northern boundary of Wetland
A, located off site to the north was delineated to establish the extent of its buffer lying on
the Seelig site, and Wetland B. A summary of the vegetation, soils, and hydrology
observed in the wetlands and the on-site upland is presented below.
Page 6
Vege�a�ion
The central areas of the site represented by DPs 1, 5, 10, and 12 are dominated b} young
black cotton�i�ood (Populus balsamifera), with a dense understory of Douglas spirea
(Spiraea douglasii) and scattered Oregon ash (Fraxinus latifolia) saplings. Cottonwoods
at DP 5 were sapling rather than young trees and this central area of the site was opener,
supporting primarily herbaceous species. Other species growing on the fill material in
occasionally dominant cover include red-osier dogwood (Cornus stolonifera), Himalayan
blaekberry (Rubus procei•us), sno�;�bem� (Svrnphoricarpos alba), goldenrod (Solidago
canadensis), tansy (Tanacetum vulgare); westem St. John's wort (Hypericum radicata),
Scouler's willow (Salix scouleriana), and swordfern (Polvstichum munitum).
DP 3 represents the southern edge of Wetland A. it is dominated by Hooker's ��illow (S.
hookeriana) and Douglas spirea; trace cover of each of the following species is also
present: cattail (Typha latifolia), Pacific willow (S. lasiandra), Scouler's willow, reed
canarygrass (Phalaris arundinaceae), slough sedge (Carex obnupta), and sapling Oregon
ash. The majority of VJetland A is dominated by reed canarygrass, yellow flag (Iris
pseudacorus), deadly nightshade (Solanum dulcamara), black twinberry (Lonicera
involucrata) and various willov�-s.
DP 8 represents Wetland B. Pacific and Scouler's willows and red-osier dogwood co-
dominate. Douglas spirea and reed canarygrass are also present and occasionally
dominant.
The forested fill banks of Vv etland A are represented by DPs 2 and 4. Red alder (.Alnus
rubra), black cotton�i-ood, red-osier dogwood, stink currant (Ribes bracteosum), and
Himalayan blackbe�- are all variously dominant. DP 11 represents the forested area
adjacent to the north end of Wetland B where black cotton�irood dominates in the
overstory, red-osier dogwood dominates and Himalayan blackberry is also present in the
understory. DPs 6, 7, and 9 represent the fill bank off-site south of Wetland B. Reed
canarygrass and chickweed (Cerastium arvense) co-dominate within the abandoned SW
23�d Street ROVJ.
Soils
Much of the site was filled with high-grade structural fill (primarily comprised of well-
mixed sand and gravel)to depths ranging from approximately 5 to 10 feet.
The site is mapped in the Soil Surve�- of King County Area as Puget silty clay loam to the
�;�est, and Snohomish silt loam towards the east. However, it is evident from the soil
survey base aerial photograph that the site had been filled and converted to urban land
prior to the date of the photograph, which was taken in 1970.
The Puget series is made up of poorly drained hydric soils that formed in alluvium, under
sedges and grass, in small depressions of the river valleys. In a representative profile, the
soil is dominantly mottled dark grayish-brown (2.SY 4/2) and grayish-brov�n (2.SY 5/2)
silty clay loam to a depth of about 45 inches BGS. The substratum is gray, silt�- clay that
extends to a depth of 6� inches or more. Permeability is slow. The seasonal high water
table is at or near the surface.
Page 7
The Snohomish series is a nearly level hydric series made up of poorly drained soils that
formed in alluvium in stream valleys. The A (or surface) horizon ranges from very dark
grayish-brown (lOYR 3�`2) to grayish bro«�n (2.�Y 5!2) silt loam, and is mottled to the
surface. The B (subsurface) horizon ranges from very dark grayish brown to gray and
from silt loam to silty clay loam and loamy sand. Depth to layers of peaty material
ranges from 13 to 36 inches. Layers of silty clay loam to loamy sand occur within and
below the peaty layers. Permeability is moderate in the upper part of the profile and
moderately rapid in the lower part. There is a seasona] high ���ater table at or near the
surface.
As noted above, on-site soils do not match these mapped soils because the site was filled
prior to 1970. Four data points, DP l, 5, 10 and 12, «�ere established on the filled area.
The soil was very compacted and impernieable at all DPs. Soil chroma is 3; mottling was
present at DP 1 within the surface 12 inches.
Soil within adjacent wetlands at DPs 3 and 8 generally matched the mapped series.
Hudrology
Wetland hydrology was not observed within the fill areas. Hydrologic indicators were
present only off-site at DPs 3 (Wetland A) and in Wetland B at DP 8.
�fFT!�A1�D DETERMINA.TIOh�CLASSIFICATION
Based upon presence of the three requisite criteria, wetlands nearly surround the site on
three sides. The wetland to the north, Wetland A, is an approximately 12.3 acre scrub-
shrubiemereent wetland; Wetland A does not extend onto the subject property. Wetland
B, to the south and east, is a 0.6133 acre (26,714 square feet) L-shaped remnant scrub-
shrub uretland surrounded by fill, 0.5117 acre (22,289 square feet) of which lies on the
Seelig property. The wetland delineation is shown on the Wetland Location survey
conducted by Bush, Roed & Hitchings, Inc., dated revised January-24, 2006, attached.
We�1m�d A
Wetland A has been designated Category 2 by the Citv of Renton. However, this wetland
could be considered severely disturbed due to hydrologic isolation and ditching (along
the southern boundary), which are characteristics of Category 3 wetlands.
Wetland A does not meet the criteria for Category 1 for the following reasons:
Criteria a: There are no listed species;
Criteria b and c: There is no open �later;
Criteria d: There are no plant associations of infrequent occunence. The wetland
is dominated by reed canarygrass, yellow flag (Iris pseudacorus), deadly
nightshade (Solanum dulcamara), black tvvinberry (Lonicera involucrata) and
various willows.
On the whole, however, Wetland A meets the criteria as a Category 2 wetland.
Page 8
lve�l��nd B
VVetland B meets the� criteria as Cate�orv 3 on the basis of human-related h��drolo��ic
alterations such as diking. ditching, channelization and,`or outlet modification; soils
alterations such as the presence of fill, soil removal and'or compaction of soi]s: and
altered vegetation.
s����E�w�r��,�or��c�Assr�rcA�rol��
An unnamed tributary of the Springbrook Creek is located off-site approximately 150 feet
south of the south property line of the subject property. The stream is included on the
King Count}� GIS Assessor's maps and is identified in WDFW SalmonScape as
documented habitat for Coho salmon. Per RMC Title IV, Section 3.L.l.a., Class 2 waters
are perennial or intermittent salmonid-bearing «�aters which meet one or more of the
follo���ing criteria:
(a) Mapped on Figure Q4, Renton V�'ater Class Map, as Class 2; and.!or
(b) Historicall5� andior currently known to support salmonids, including resident
trout, at any stage in the species lifecycle; and.�or
(c) Is a water body (e.g., pond, lake) between one half(0.5) acre and twenty (20)
acres in size.
Buffers for Class 2 streams are 100-feet from the ordinar��high water mark (OHWM); the
OHVdM of the subject stream lies greater than 100-feet south of the northern boundary of �,
the Glass 3 «�etland buffer so the stream buffer does not affect site de��elopment.
ShORE'�r�F ��AST�R ��OGRP?�
Title IV Section 3.090 G. designates three Shoreline environments, A�atural,
Conservancy, and Urban, to provide a uniform basis to apply policies and use regulations
within distinctively different shoreline areas. Both Vdetlands A and B have been
designated Conservancy Environments. Sections K and L provide guidance on factors
that must be considered in using these environments. Among the uses that must be
considered, the only potential use relative to the subject property would
be Environmental Effects. Such affects include pollution and Ecological Disruption, i.e.
potential effects on water quality, water and land vegetation, water life and other wildlife
(including, for example, spawning areas, migration and circulation habits, natural
habitats, and feeding), soil quality and all other environmental aspects must be considered
in the design plans for any activity or facility which may have detrimental effects on the
environment. Applicants for permits must explain the methods that will be used to abate,
avoid or otherwise control the harmful effects.
R�G�LATORY IMPI�ICATIO�[S
Y�?f��nds
Per Title IV Section 3.OSO.M.6.c., Category 2 wetlands in Renton (i.e., Wetland A) are
protected with 50-foot buffers and Category 3 wetlands (Wetland B) are protected with
?>-foot buffers.
Paoe 9
Title 4, Chaptei- �.O�O.C.� (Specific Exeiliptions — Critical .qreas and Buffers), allo���s
discharges to wetlands and construction of bioswales in wetland buffers as described
belo�-:
i. New Surface Water Discharges: New surface water discharges to wetland
Categories l, 2 and 3, or buffers of Categories l, 2 and 3, and to streams ar lakes
from detention facilities, presettlement ponds or other surface. w�ater management
structures; provided, the discharge meets the requirements of the Storm and
Surface V4'ater Drainage Regulations (RMC 4-6-030); will not result in significant
adverse changes in the w�ater temperature or chemical characteristics of the
w�etland or stream!lake water sources; and there is no increase in the existing rate
of flow unless it can be demonstrated that the change in hydrologic regime would
result in equal or improved wetland or stream!lake functions and values. Where
differences exist between these regulations and RMC 4-6-030, these regulations
will take precedence.
ii. Stormwater Management Facilities in Buffer: Stormwater management
facilities in critical area buffers including storm«�ater dispersion outfall systems
designed to minimize impacts to the buffer and critical area, where the site
topography requires their location within the buffer to allow hydraulic function,
provided the standard buffer zone area associated w�ith the critical area
classification is retained pursuant to subsection L or M6c of this Section; and is
sited to reduce impacts berii-een the critical area and surrounding activities. For
Habitat Conservation Areas, this exemption applies only to Category 1 wetlands.
Stormwater management facilities located in wetland buffers shall require buffer
enhancement or buffer averaging when they are sited in areas of forest vegetation.
No impacts are proposed to wetlands on the subject site. However, a bio-filtration swale
is proposed within the buffers of Wetlands A and B, as shown on the storm drain plans.
These areas are forested as may be seen in the photographs below. Per Title 4, Chapter
3.OSO.C.S ii., quoted above, buffer enhancement plan will be provided per the proposed
Conceptual Buffer Enhancement Plan, below.
, Photograph 1: Forested buffer at location of proposed bios���ale, Wetland A.
r , __ : � �>�,
I �`.y �� j ..k K�:
L fr
� ,- � � .'� T ,1�
'y�-- '{n. �, p.
� � i 5 '�.�d� .-�
� � 1
'a" , �-`
,� �
Page 10
Photograph 2: Forested buffer at location of proposed bioswale, Wetland B. Note the
���etland botindarv (standing�iater) at the bottom right of this photograph.
i '`+ '' y ,• r _
;� � , ; .
i #•,
�
� a � I} J � � Y�
�-�- 4
'� : � : ,�:��
,
�`z 4 r� - 's I'a�:� 's x
. i. _ t � / j :
_ ��
i
I
,-�s can be seen irom�thes� photograph�, �thc butter at both Wetlands A and B are �''
dominated by black cottonwood at the location of the proposed bioswales. �
S�re�ns
The stream located south of the SW 23rd Street ROW is protected with a minimum 100-
foot buffer, per Title IV Section 3.L.1. No stream buffer reduction or averaging will be
necessary on this project.
Shoreline Conserti�ncy
No impacts to a Shoreline Conservanc}� Environment, i.e. the wetlands or stream, are
proposed.
�^oposed buffer i�pac�.s
A total of 1,727 square feet of on-site buffer within the buffer of Wetland A and a total of
3,979 square feet ��•ithin the Wetland B buffer will be impacted to construct the proposed
bio-filtration swales.
G�n�epfual Buffer Enh�ncer�en�Pl�r�
To compensate for tree removal pursuant to the proposed bio-filtration swales within the
buffers shown in the photographs above, the applicant is proposing to plant 300 conifer
seedlings, i.e. 200 Douglas fir and 100 western red cedar, within the approximately
35,000 square feet of onsite buffer lying outside of the proposed bioswales associated
«�ith Wetland B and 12,000 square feet of onsite buffer associated with Wetland A. The
e�isting buffers are currently nearly devoid of coniferous trees, so this proposal will
result in a significant habitat improvement to the wetlands and buffers. The seedlings will
be distributed randomly throughout these buffers, targeting areas v��ith few trees to
enhance survivorship. The number of trees that will be planted is disproportionately great
Page 11
compared to the area of proposed impacts: attrition is expected due to thc impracticability
of irrigation or other maintenance activities. Planting will occur in November to enhance
survivorship. No monitoring of the plantings is practicable nor appropriate; it is
anticipated that even if survivorship of as little as 30°'0 of the total trees planted occurs,
these trees will ultimately compensate for the total �,706 square feet of buffer impact
area.
,I
i
h
I
Page ]2
REFERENCES
Hitchcock, C.L., and A. Cronquist. 1973. Flora of the Pacific Northv�-est. Univ. of
Washington Press, Seattle. I
King County Planning Division. 1986. King County Vdetlands Inventory Notebook, ��
Volume 2 East.
King County, V4'ashington. Sensitive Areas Map Folio, December, 1990.
Metro King Count�� Website. GIS Center.
www5.metrokc.gov/servleticom.esri.esrimap.Esrimap?ServiceName=overview& �
Glient....
Microsoft TerraServer Imagery. http:%�'terraserver.homeadvisor.msn.com
Munsell Color. 1992. Munsell Soil Color Charts. Kollmorgen Instruments Corp.,
Baltimore, MD.
Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands: National
Summary. U.S. Fish and Wildlife Service, Washington, D.C. Biol. Rpt. 88(24).
244 p. 1993 Northwest Supplement, Region 9, December 1993.
Snyder, D.E., P.S. Gale, and R.F. Pringle. 1973. Soil Survey of King County Area,
�'ashington. U.S. Soil Conservation Service, Washington, D.C.
I Soil Conservation Service. 1985. Hydric Soils of the State of Washington. U.S. Soil
i Conservation Service, Washington, D.C.
Soil Conservation Service. 1987. Hydric Soils of the United States. In cooperation with
the National Technical committee for Hvdric Soils. U.S.D.A. Soil Conservation
Service, VVashington, D.C.
U.S. Fish and Wildlife Service. 1993. Northwest Supplement to National List of Plant
Species that Occur in Wetlands: Region 9. Biol. Rpt. 88(24).
' Washington State Department of Ecology. 2004. Revised Washington State Wetlands
Identification and Delineation Manual. Ecology Publication �04-06-02�.
Washington State Department of Fish and Wildlife SalmonScape.
http:ii��-dfw.wa.�ov/mappin�,%salmonscape�-'index.html
I
�
'�
Page ]3
APPEI�DI�i 1:
I�ET��AhiD DET�R.MII�ATION DATA FORMS
Page I-3
D�T� FOR�1 1 (Re�ued)
E
! Routine �Vetland Determination
{�t� State ���etland Delineaflon Manual or
1487 Co s «etl:.nd Delineation '�'ianuatl
P;v;cct,�Si�e: �r/'1. q� ��� Daic: �' ja JC /� !
1 �
Count �
Applir�nUou�t:: �S-e2,��G� } �i Y'�_,
J St�ie: ,�; �,
/�, S,'T,R: (�. �
In�csti�_a[or(sl: �.1 �����C�
I Do!�c�rr,�al Cirrumstancc�txist on [hc sitc' , .�ts no � Cornmunin ID: ,
1s thc cite si�nifican�ly di�tur�d (a,�pical situationi.' yts no `\ Tran�tct ID: _, .. �
Fs chc arca a poicnti�l Problcm Arca^ �•ts no l , Pfot ID: ��-- 1
Ez�lan�tion of a�� i�ai or roblcm arca: ;�'f3•i�-e� - �(� f��% __ .. _.__
�'EGET.ATION (For str.��a, indi.^�iG T=VCG: S = Shrub: H=htrb:V = vinc)
Dominant Plant Species Stratum 4r co�cr [ndicator pominant Plant S�ecics Stratum �� co��er Indic�tor
a�-- � � ����'-
a..�c. l.t�.�_ U t- i
, . d��. � ,^ " -
s � :� --�������
�� � j
H1'DROPEi1TIC �'EGETATIOti I\DICaTORS: �
�'.r of dominans OBL.FaC`�'.<i F.-�C /(�r"`j
Chec1:ail indicators that�pp}}�g t�pt5in belo���: �
Visual absen-a:ion of plant soecies �ro«�in� in Ph�-sioln�icaUreproducti�•e adaptations
are��of proionged inun��tionl;a[ur�tion «'t[land plant data6ase
NSo:phologiczl adaptations Pzrsonal knowlcdgc of«�ional plan[commur.i[ics ,
Tr.hnical Licerature Other(ez lain)
� Ht'droph}'tic vegetation present� �a� no
Ra;ionale for decision/Remar4:s:
HI'DROLOGY - .
Is it ttit gr���in�season'' . �-es no �'ater Marks: ves no Scdim�nt Dtposits: yes no
,�A on
Baud on: �'0'�'soil tzmp(record ttmp ) Drift Lincs: ��es o Drain�gc Patterns: yes no
othtr(explainl
Dept.of inundation: ---�inches Oiidized Root(li�c ro� ' Local Soi1 Surve�': yes t►o
� Channels<f 2 in.�•zs �ho
Dcpth to fr�t v.•ater in pit: r inches Lxf��-� � EAC Neutrai: • yes o1 Wacer-staintd Leaces ycs o
., t h t o s a t u�ced soil: �--`-inches ��
�
Chec{;all �hat apply&e�plain belo��: ` Other(upfain):
Strcam,Lake or ga=e data:
Atrial hoto�ra hs: Othcr:
Wetland h��drolo�r present? }•es no ;
�
Racionale for decision/Rtmarks: �
SOILS
Map Unit '�ame Drainase Class
�crics & Phase)
Field observations cont"irm `r'es No
Ta.Conom�� isuboroua) ma d t • e'
Profle Description
D�pth Horizon Ma�nx color '�lottlz colors �loctlt abundance Texturc, c�ncretionc, Dra��inR of.oi]
(inches} (Munscl! (Munsell siz- 8: contr�st structurc. etc. profilt
moist) moist) (match d�scriotion)
�" / / K3/ I — -- � �
�` : � � `�� �=�
�- �,�.�: � �/.� -, � �- '� � , ��� ` ���.�'��
,` ,
� i 1 �' .�.".��.��-_
��..-��f� ��C.2 � �;/,n. :� --- __ �``" �,�.; � �
� � y� . �
l/IIy�^'/ly .� {/+ �.p ��/�,;..�
I��' -`-�j`i �� �...�V'l f �', �^ � '" ���
�/-T� �� /
� .�...�- �/
Hydric Soil Indicators: (check all that appfyj
4�iistosol Matrix chroma <_? with mottles
Histic Epipcdon Mg or Fz Concr�tior.s
Sulfidic Odor Hish Oreanic Content in Surfacc La��cr of Sand�- Soils
Aquic Moisture Re�m� Or�anic Scrtakins in Sand;• Soils
ReducinQ Conditions List�d on \ationallLo�:al H�dric Soils Li�t '
� Glevtd or Lo�t•-Chroma(=1 i matrix Other(e� lain in remari:s}
H��dric soils present' �•es no .
Rscionalz for dccisiorvRemarks:
«'.etland Determination (circic)
Hydroph��tic vc�etation present? ycs no
Hydric soils present? es no Is the samplin� point �cs n�
V�'ztland h�•droio^_v resent? cs r� , ���i[hin a wetland'.'
RationalelRemarks: ,
�� �
!r'OTES: !���'�'�l,(,� ��'�� �� ��� 1,��.
l''� ' � �
2_(�(_.t_`-2{.r1 !�}''tc:�'�C.G'h-t:.Gc�" �--Q��, ��--�"`'L , -�,
��i ., A ,t,�...� ��,,� � �� ���t4.:?--�"' f-t��' `3�"`�(�t'u'v�.Q-�.�--,•r�_.
�jj yV� � � O
'c1 � �ti��.�-,
I f �.,� c
�-l9 f {��'���� r'("%(,,` ' ��-�1'�-� C��U"t�`'� �
� � � Re�zsed 4/97
�
� �'�j��� ��° z Z` �'�, � .
� j'YI,LQi�L�
D,�T.� FOR�t 1 ('Revued)
Routine «'etland Determination
(«.� State «�etland Dctineation I�1anual or
1957 Co s tS edand Defineation !Vfanuall
Prujcct/Sitc: , / Daic: ��✓ ���
V�22-.�.�i f_..--!f's.l.�, �U`�._--
Applir�nUou-nzr. �;�.G��,�/,�� �,�'G�.�.c.G, Count)': �'/ y� G�
�,Y' St�te: �-� ,
In•:-stic�tor(s):
G�� s,�;R: �.,�,;�:�-.t'',.,�"�r,
Do'�<�rmal Cirrumstanccs tzist on tht sice'' �t ,.�`s no Comrnunit� ID� . . '
Ls ttic sitc si�nificantl��di�turbcd (at�pical situationi' vts !no Trar.�ect ID: ' '� _. _
Is�hc arca a po►rn�ial Problem Area^ � � ��e� '�o Ptoz ID: ��`7� r
:.xvlanation of at�� ical or �blem arca: ` e�>�1�1f�/ C ��� �' �
��EGETATION (For strsca, indic�tc T=vec: S =sh;ub: Ei =" trb: V -vine)
,
Dominan� Plan; 5 ccics Str�ium 9r co�er Indita�or pominant Plant Soccies Stratum �ic co��cr fndicatar
r ;I• � r,�-�r r� �U ��v
r ' � °� .� � � ��
!Cw�-U � I T" �,�e�,,
,,
�-
i
i
Fi�"DROPEi1TIC VEGETATIO;� ItiDIC�TORS:
�of dominanu OBL,F�C�',b F.�C Q�
Ch�ck all indi.ators that appl}�c� zxpl5in beio«�: �
Visual obscn-ation of plant spccics gro«�in� in Phvsiolo�icaUreproducti�•e�daptations
arc�� of proion�ed inund�tionhacura�ion «�zcland plant dat�base
htocphological adapt��ions Pzrsonal knowiedge of re�iona! plant commur.it;es
Trhnical Liczraturc Other(explain)
` H�'droph�•tic vegetation present' �� no �
Ra�ionaie for decisionlRemarks:
HITDROLOGF
Is it the grou-ing season�' ��s no � V��aier Mar�:s: r'es� no Scdimcnt Dzposit . es no
) �� on
Bssed on:G�.B�soil �zmp cre�ord ttmp ) Drift Lincr. yes no Drairt�gc P:,tterns: }�es no
other{tz lain)
Dept.of inundation: � inches O�idized Root(li�•e root Locz! Soil Sur�•e�•: yes no
�- Channds<12 in. �•es no
Dcpth to fr�t w•ater in pi.: inchts FAC Neutral: y�es o Water-stained l.ea�•�y ' no
_ �h to saturaced soil: r inches
Chccl:all that apply &e�plain bcl��+�: Othu(ezplain):
Sveam.Lake or gage daca:
Aerial photo�ra hs: Ocher:
Wetfand h�-drolog.�� present' �•es no
Rationale for dccision/Rzmart:s: �j
i SOILS
{ Map L'+ni� tiame DrainaQe Ciass
crics &: Ph�se)-
Ficld observacions confirm Yes No
� Taronom�� (subsrou 1 ma ped t e?
Profile Description
Dzpch � Horizon Matrix color Mo�tle colors �lottl: abundance Te�ture,c�neretions, Drs���in� of.oil
(inches) � (Munscil (Munscll sizc g contrasc structurc, ttc. profilr
� moist) moist) lmacch descna!ion►
���F�� ,,�-� o R � / ���- ��.,(�
�
I r .
�� �
a
�.�-�"�,,�.,�•t.",,
, �z-t1k �-�+
i
H��dric Soi! Indicators: (chcck all tha: apply j
Histosol �Matrix chroma <_? with monlzs ,
Histic Epipedon Mg or Fz Concraions
Sulfidic Odor Hioh Orsanic Content in Surfacc La�•er of Sand�� Soils
Aquic Moisture Rcgimz Orsanic Streakin�in Sandy Soils '
� R�ducina Conditions Listed on \ationaULocal H��dric Soils List
Glzvtd or Low-Chrom�(_1) rnatrix Other(z� lain in rernarks)
H��dric soik present? �• no
Rationale t'or decision/Remarks:
��'etland Detecmination (circle}
Hv�roph��tic vc�etation prcxnt? � no
Hydric soils present? � no Is the samplin� point �z n�
V�'eiland h�•droloRv resent? � no ���ithin a wetfand^
RationalcJRemarks:
�� � �_ �'t' i-- ' �,,� �,�-�� _
� . - .' .
� : . ;
NOTES: ,�•�����
��
Revised 4197
D:�Ta► FaR�1 1 (R�v�sed)
Routine «'etland Determination
(«.a State «'etland Delineation Manual or
1987 Co s «�etland Deiineation Manua!)
�•� ! Datt: / �/
prujccJSicc: :'.�.f,,..�'.'�.��.�G'� ` �'�^ � �_���.., �����f/ ��T
c�-
Appliz�n�'ow:�tr `� County: J�'�
�,�.( St�te: ��/� � ,C"'�
Intcsti_�[orlsl: (r. ��'�' -l�Kl•�; SR/R: / '�-��t.-r,,i�?�-�
po!�<�rmal Circums[anccc ctist on chc si[e' ��cs no Communit� ID: ,
Cs thc ci�c si�nificaml}•disturbcd (at.pical situationt^ vzs r�. Transect ID: � �_ .
Is the zrea a potrnti�l Problem Area' yes no Plot ID: ��� _.,7 , _
�Dlan�tion of an• i�al or roblcm arca:
�'EGETATIOti (For str:a, indica�e T=vee: S - shrub: H =htr+�: V=vine)
D�minam Ptam S ccics S�racum �� co�r. Indicator pominant Plan[ Soccics S�ratum 9c co��cr (ndi�aror
i--� .� � �' � �����"
_�
' )
� � �� I�� � � ^ ' ���� S I
, � , f
-� � � �� � i
, ;
1 �/�ld� � ' �� j
� �.
„�-aP _ � �Zc���5 �-,
,
, �
C'G(�i.2.:� �� t � �
r �c �� � ��� —t�� �
H1"DROPHITIC�'EGETATIO� ItiDIC�TORS: ��Q� � 4�ar ` �
._��- f�
2 of dominanu OBL.F.aCu',S F.�C� ` -
G�'� 1'''�.''�L �'`-� ��"�� `�'.�' D�
Chcck all indi�ators that a�pi}�&: txplain beio.�-: U (, '
Visual obsen-ation of ptam specizs�ro«�in� in Phvsioio=icaUreproducti�•e adapta[ions
arez of prolonged inundation/;�turation «�:tland plant database '
hSorphoio�ical adaptations Pzrsonal knowied�c of re�ional ptant commur.ities �
Tr.hnical Li��rature Other(et lain)
Ht�droph}'Lic vegetation present° �-es. no
. . � �
Ra�ionaic for decisionlRemarks:
Hl'DROLOGY
Ls it thc gro�in� scason' ��eS no �'a�er Marks: ��es no Scdimtnt Deposits yes o
on �-
Based on�osl �em 1 ecord ttmp ) Drift:tines: >•a no Drair.a�_e P:,tterns:` }�es na
othzr(c� lain 1
Dept.of inundation: inches �.�� Oxidized Root{[i�•e roou) Local Soil Sur���•:\ye/no
Channds<12 in. ves no
Deptfi to frct w•a[er in pit: � inchts �AC NeutraL- • yes n V4ater-staintd Lea�� y�s o
� � �___
D th to saturatcd soil: inchcs
Chec�:aIl that apply &esplain belo�•: Other(ezplain):
Stream,Lakc or ga�e dara:
Aerial photo�ra hs� Other:
Wetland hrdrolog}• present? es no
Ftationale for dccision/Rtmart:s:
�
�
cpILS i
?viap Uni� '��me Draina�e Class
�crics &: Phase)
Ficld observations confir,n Ye� Tio ,
Ta�onom�- (sub�rou ) ma d tv e?
Profile Description
D:pth Honzon Matrix color '�lottle colors �to[tlt abundance Texture.concretionc, Dr����in; of soil
(inches) (MunseU (Munsell size 8: contrast structurc, ctc. profilr
moist) mois[? (matc;� dcscriptionl
t�' � _�` �
� J
`'�-/�f - '�� �� �- �e y G � ✓-��
�
,
I
�
�
H�•dric Soil Indicators: (check all that appfy) /
His�osoi ✓ Matnx chroma<_? wich moales
! Histic EDipedon M�or Fe Concretions
! Sulfidic Odor Hish Or�anic Content in Surfacc La��cr of Sandv Soils
Aquic Moisturc Regimz Organic Streakina in Sand}' Soils
RzducinQ Condition; Listed on \a[ionaULoca! H}'dric Soils List
� t Gltvtd or Lou•-Chroma(=1) matri� Other(zx lain in remark5}
H�•dric soiLs present'. no .
R��ionalz for decision/Remarks:
��'etland Determination (circic)
Hydroph��tic vt�etaiion prescnt? no
� Hydric soiis przsent? es no Is the sampling point �es no
'�'?tland h��droio�v prtsent? � es no ��'ithin a wetland^
iRationalelRemarks: `
- ��� f . �� f�- . . � .
��� ,
� � . �
NOT£S: / ' / . , 'l� � � /
�--�d � �-� �- �� �,�- �;�
; ���
;' ri`s �s�
'' � Revised 4/97
L �^�l� /� ✓l'I
.--� ,
J� n f� �,��.
D:�T�► FOR�1 1 (RcvLsed)
Routine��'etland Determination
(«�.a State «'etland Dciineation h'[anual or
1987 Co s ���etland Delineation Manuall
� �?�tt: � � ./
prujccL�Sitt: / �/��"
l�n eQ /'-E--r�� � ,�
AppliranUouatr. County: ���
S��te:
Ir�esti�_ator(s): U � 5��: ' "��� .
1 Do Nc�rmal Cirrumscanec�ttiist on che siie' �e- no Communit� ID: �
Is tn: site si�niFicarnlv ciisturtr_d (an pical situation i'.' vz; �n ' Tr�nsrct ID:
Ls the arca a poiential ProDlem Area' ��t� �'no'� � • Piot ID: `�� � _
Ez�l�nation of an• ical or robiem area� ' d'�f�-
�'EGET.ATION (For strata, indicate T=vee: S = shrub: H=htrD; =vinc)
Dominan� P:an! S ccies Scratum 9c co�er Indic��or D�mina.�t P�ant Species Str�t�m �i� c��er Indicator
� � �� .�
�-�--�--- o?-(� L� �d�`��� � C
;
-,—� , ; ,
�� ��i T- �.�ti - ;�� ✓�r 7� ,,�t
��u �; �� � `_� S� ���- ,�..c � r ' �r _ �� � ,
� � /� � .�,,, ' �
c� � l��1.�{1'-- � J �r ����".` '
. ,Q ,. /, , ,�5. �� rr— /'��� '��
��` 77 c.i
�Y tl �'Gt--. •—�7��i ,� ;�-1,�'�—.�i#
H1'DROPEil'TIC �'EGETAT OA I1DIC.aTORS:
� . of domir,ar,u OBL.FaC�', �i F.�C� ` �',
Ch�ck ail inaicators thac sppl�• g zxpl�in beiotL: " ��
Visual obs�n-auon of plant species�r����in� in Physiolo�icaUreptoducti�•e�dap�aiions
arc��of prolon�ed inundation/s�[uration ���z�land ptant datahase '
hSo:-pholo�icai adaptations Personal knowJedgc of reeional plant commur.iii�s
Tr.hnicaf Litzrature Other(ex ]ain)
Hz'droph}•[ic vegetation present' �-es no •
Rationak for dccisi�n/Rcmari�c: ' I
HZ'DROLOGY
Is it tht grou�in� scason'' ��es no V�'atu Marks: ves �o St�iiment Dcposits: yes no
Q � on - � i
Based on: �.d'� soil ttmp(record tCmp ) Drift Lines: >•es rio Drainl��c P:,tterns: }��s no
othtr(ct lainl _ 'i
Uept.of inundaii�n: inches Oxidizcd Root(li�•e root Local Soil Surve�•: yes n
�Vr, ChanneEs<12 in. ��es `n
Dcpth to frec �.•ater in pit: � inches _� FAC NcutraL• yes n Wa�er-staintd l.ea�-es yes o i
th to saturaccd so�l: .�— inchcs 'I
Check all [hat apply &czplain below: Othcr(czplain): I
Strcam,Lakc or ga�c da[a:
Acrial hoto�ra hs: Other:
Wetland h��drolog}• present? }'es no
Rationale for dccision/Remari:s: �� i
I
- - -- — --- �
SOILS
?.�;ap Unit '�ame Draina�e Class
>crics R Ph�se)
Field observations confirm �'eti r1p
TaYonom�� (suberou ) ma d t • e?
Profile DescripDon
IY_pth Horizon Matrix color Mottiz colors �Soctl: a�undanct Texture, concretionc, Dra��in_ of�oii
(inches} (Muns�ll (Munsell size R contrast stcucture. �tc. profilr
� moist) moist) (match dc�criDtion►
�
�-l�'�- �-� lry� �� — � ��-�`-�y �--U
�
, �
�
�
�
G
H��dric Soil Indicators: (chcck a11 that appty j
Histosol Matrix chroma <_ ? with mottles
Histic Epipedon M=or r=t Concreti�ns
Sulfidic Odor Hioh Orsanic Contcnt in Surfacc L��-er of Sandv Soils
Aquic Moisture Regim� Or�anic Str�akin� ir Sandy Soils
Rzd�cins Conditions Listed on \acional/L..xa] H��dric S��ils Lict
� Gltvtd or Low•-Chrom�{- atriz Ocher (ex lain in remarks)
H��dric sai�s present'. ��es rio
Ra�i�nalz for decisiorJRemarks:
��'etiand Determination {circle)
Hvdroph��tic vz�etation presenc? t�s no
Iiydric soils present? ya � Is the samplin= point «s na
�'ettand h�•droloRv resent^. vcs no "�ithin a wetland''
RadonalelRemarks:
. ��- �e�- � t,c,2 ���r-�--P �/L--
G� �-�d�-2
�
ti OTES:
Revised 4/97
D�T.a FOR�1 1 {Revised)
Routine ��'eiland Determination
(«.� State «�etland Delineation �1anual or
1487 Co s «etland Delineation !�Za�ual)
Daic: C//a z] /C��
Pruicct/Si�c: ��K CJ
� � s ��� ��.� � �
� .AppliranJo�Tcr: Counry: //' '
j S[aie: `���
In�citi�_�toris): �.. 8�� 5��: /��-`"�
Do?�armal Circumsiance�ttist on the si[c' , no Communit� ID: . .
Is the site si�niFicantiv di�turbed (at}�ical si�u�tioni".' �ts � Tr�nsect [D: ,. ..
is the area a poienti�l Probicm Area' . vqe,s, � � � Plot 1D: �
� E�cptan�tion of an�picai or roblem area: - J`Y(.c�i!1%t�--� �- �d
� ��EGETATION {For�tra:a, indic�tc T -cc: S = shrub: H =htr�; V=vinc)
Dorninant Plant S ecies Stracum �c co�er Indicator L�omi�ant P:ant SDccies Str�tum 4c co�•�r lndicator
I ''
� ��.��c,r. �-�� � U !�1-� �lGl�v�- ��v�-c_, v -�-�
.
� �� / � � �.(n/ r,,�..c�� - �� ,�
' ^�`� i r
/ s
,���- I �-- /O f��-
� �
v , I --�--
,t_ ,� (".�r.. �'�/ � � �'�Li
� s�- r�r /� ;''!� ��t�/-
/� � /�. - � ��
/`� r'(i t�LL ' ! / G� . F/'-�-
H1 ROPfi1'TIC�'EGETATIO� I\DICaTORS:
��
z of dominanu OBL.F�Cu',� F.�C ��
Check all indicators that appt}•g cxpl5ir. belo«�: .
Visual obse:z'ation of plant s�cizs �ro«�in_ in Ph��siolo�icallreproducti.•e adap[ations
arcr.�of prolonocd inundation/;atu;ation «�ttland plant database
t�torphological adaptations Pcrsonal knowiedgc of re�ional plant commur.ities
Trt�nical Li�zntnre Otbcr(ex tain)
HL�dropt��•tic vegetation present'. �•es no -
Racionalc for dccisionlRcmarl-s:
HI'DROLOG�'
Ls it the �ro�-in�season'' ���s' no �'•'a�er Mar►s: ves rYis Stdiment Dtposit�: yes o
� on
Based on: soil te (record ttmp ) Drih Lines: ycs no, Dsain�_�e P�tterns: �•es nn
other(ez lainl
Dept.of inund�tion: ^ inches Oxidiztd Root(li.•e root Local Soi! Surve��: yes no
Channels<l2 ia. vts 'o�
Dcpth to fret w�ater in pit: � inches ��i FAC Ivcutrsl: yes no Wacer-stained L.e���es ye n�
De th to s�turated soil: �'"" inches �
Check all thai apply&ecplain beloK�: Ochu(ezplain):
Stream,Lake or ga�e data:
Aerial hotoora hs' Other:
Vtiettand hcdrolog_�'present? }�es �
Rationale for decision/Remari:s:
SOILS
Map Unit :�ame Draina�e Class
:rics R Phase) �
Field observations confitm Ye� No
LTaxonor.�•� (sub�roup) mappzd rype?
Profile Description
D:pth Horizon hlat�x cofor '�tottlz colon �tottlz abundance Texture, concretion�, Dra��in� of soil
(in�hes) (Munsell (Muncell size h� contrasc struccure, cu. profilr ;
moist) moist) (march dc�cription�
��i� _ � � - _.___ � �
, _
U
I
H�'dric Soil Indicators: (check all that appiy)
Hiscoso! Matrix chroma <_ ? with mottles
Histic Epipedon Mg or Fe Con�reti�as
Sulfidic Odor HiQh Or�anic Content in Surface L���er of Sand�� Soils
Aquic Moisture R��ime Or�anic Strtakina in Sand}' SoiIs ,
I RtducinQ Condi�ions Listed on \atioRaULocal H�dric Soils Li�t
Glzvtd or Lotv-Chroma(=1 atrix Other(exp{ain in rerrarks)
H�-dric soils preseni' ��es 'no
�
Ratianalt 1or decisionlRema:ks:
� �
�
�;'ettand Determination (circic) -
H�droph�tic vz�etation presen['. yes ��
Hydric soils przsent? s n Is the samplin� point �ts �
�'etland h��drolo�v r-esent'' es no �rithin a wetland^
RationalelRemarks:
!�OTES:
Revised 4/91
,
D.-�T.a FOR�T 1 (Rtvised)
Routine ���eiland Determination
(��.� State «'ettand Dciineaoon Manua(or
1987 Co s «�etland Detineation ?�'tanuall
Prvjcc�/Sitc: ' � Da[c: !�/-.7/�,1
1��.� � � � `�
Appii��nUewrcr: �.�f�� Coun[y: ,
Staie: �-C�t/� �r'�M�}ti,;
Fn�:sti�_ator(s): �...-'�� -
S�T/R: � `
� Do Nc�rmal Circumstancec etist on thc sitc"' �t� no � , C�mmunit� ID: . _ .
ls thc site si�ni�cantl��di�turbcd (at��pical situation�'.' �S�:' no '���, Tr�n�ect iD: 'f`�_r�M _, .,. '
Is che zrca a potential Problem Area' vz, n�J 'J Plo[ ID: 1 t -� �
E��lan�tion of an•aical or p:oblcm arca:
� �'EGET.4TION (For strata. inditate T= vice: S = shru�: H =htrb: V= vine)
Dominant Planc S �cics Svatum rr co��cr Indic3t�r pominant Piant Soc:ies Str�tum �ic co�•er indi�ator
i� � �� ,
� �
i
�
�
�
�"Di20Pfi1TIC�'EG£TATIOti I\DICaTORS:
2 of dominanu OBL. F:�C�',S FaC
Chcck ai3 i�di:ators that app])'g txpl�in beio�t -
Visual obscn-ation of plan�specics�ro«�in� in Phvsioi��icaUreproducti�•e adap[ations
arc��of prolonoed inu�dationi;aturation «'tt3and plant database
N]or�holo�icsl adaptZtions Pzrsonal knowled�e of re�ionai plan�commur,itics
Tr.hnical Literature Other(cx tain)
H��droph}•tic vegecation present1 �=es no
Rationa{c for decision/Rcmarks:
HI'DROLOGY
Is it the gro��in� se�son.' �es� no� �'ater Marks: ves o Szdiment Dzposits: ye no
/.u�t--Cx �n .
B� d on: so�l czmp1(rec rd tzm ) Drift Lina: ycs nd Draina__e Patterns: }�es n'o
oth{r(cx lain►
IYpt.bf inund�iion: — inches Otidized Root{���c roo Loca1 Soil Sur.�e�-: ya o
Channtls<12 in. �•ts
Dcpth co fr�z �•ater in pit: � inches1l��r FAC Ncutrai: y�a no Wa�cr-stainzd L,ea�•es ycs�
ch to sa�uraced soil: inehes l•--�
Chcck ali that apply&explain belo�: , Ochu(ezptain):
Stream,Lake or gaoe daca:
Aerial hotosra hs: Other:
Weiland h�-drolo��•present? �•es no
Rationale for decision/Remari:s: -'�
sorLs I
Map Unit '�ame Drain:�ge Cl:ss
:rics 8: Phase}
Fseld observations confirm Yes No
Taxonom�• isuborou ) ma a�d tv e�
Profile Description
Lkpth Horizon Matrix eolor '�4ottle colo;-s �loctlz abundance Texture,concrttionc. Dra���in:of:oil
(inchcs) (Munscll (Munsclf size &: contrast structure,etc_ profilt
moist) moist) (match dcscriotion) I
�
o--�� l� � 3l3 �a-��-� I
I
� I
� �,
H�•dric Soil Indicators: (check all that app}y) ,
Histosol Matrix chroma <_ ? w;th mottles �
Hisuc Epipedon M= or Fe Concretions �
Sulfidic Odor Hi�h Oraanic Content in Surfacc L��•er of Sand�� Soils
Aquic Moisturc ReCimz Or�anic Streakin�in Sand}' Soils
Reducin�Conditions Listed on \ationaULocal H��dric S��ils Li�t
� Gleved or Lo«�-Chroma t=1 l matrix Other(e� lain in rcmarks)
H��dric soiLs present.' ��es no _
Rationalt �or oecisionlRemarks:
�;'ettand Determination (circic) .
Hydroph��tic vz�etation pr�5ent? ,�c no
Hydric soils present? yes � Is the samplin� point �es no
V�'etland h�•droloRv present° vcs �o �t�ithin a wetfand^
� RationalelRemarks:
I -
L .
-. . . ,
tiOTES:
Revised 4,/97
D�T.� FOR�1 1 lRtvised)
I Routine «'etland Defermination
(«.a State «�efEand Dclineation Nlanual or
1987 Co s «�etland Detineation NSanual)
PrujccL�Sitc /� � Datt: � J
_ �/ '2� /`t�t.�L._- � �� � 1
Appticant/o�.-ncr: ��� „/ County: � /
v v}' St��c: � `�� r �j ;.ti�ti.:
in�csti�ator{sl: �7�
SIT/R:
/�
� p� tic,rmal Circumscan�cc tzisi on�he sice'' �e� no ��l Communii� ID: , _
is thc cite si�nificancl�-di�turb:d (ac��pical sicu�[ion�.' vt; no t1 ;;-� Transect ID: �l~_ �. ._
Is thc area a poienti�l Problem Area^ ye� no ''�''�— Plo� ID: � / 7 _ _
Fcvlan�tion of an• ica2 or problem arca: ,
�'EGET.ATION iFor itra[a, indicaee T=tree:5 = shrub: H =h�rb; V=vine)
Dominant Plam 5 �cics S[ra[um 9c co�cr Indi.acor pominant P:ant Svccics Str�tum �ic co�•�r InJicaror
��zrt �—�-t�-�' �-�-- l�,'� � � � 02-.�>' �
��
��
a
G�-ri � I
0
� \
�-��' —��
' l � ��-r �,-r D � � i ��'- ��Z� i �,
I ��� � T � � .
, —
�
�: �
H�'DROPHITIC �'EGETATIOti I\D1C?.TORS: ' '
� of dominanrs O$L. F.�Cw•',ct F.�C��
Ch�cl:ail indicators that�ppl�• g txpl�in 5elo��•: "
Visuai obsen-ation of plant specics ero��-in�in Phvsiolo�icaUreproducti�•c�daptacions ,
���c of p�olonoed in�ndationfsatara[ion «�te3and plan;database �
hiorphological adap:acion's Ptrsonal knowicdgc of rc�ional plant commur.itics I
Trhnical Li�zrature Other(ex la;n)
H��droph}•tic vegetation present' ��es no • �
R.ationak fa:decision/fZcmarl:s:
H1'DROLOG�' '
Is it tht�ro�-ina season° .ts no� V�'ater Marls: ves n� Stdiment Dtposits: yes�oJ
�,t�r,e.E.a�.,rr �C��fi. ,�.�c,u-e„ on � --
Based on: soil �zmp trecord trmp } Drift Lines: yes no Drain�ge Patterns: ��es no
other(ez lain) _
Dept.of inundation: " inches Oxidizcd Root(li�-e roots Loc�l Soil Surve�•: yes no ,
Q, �'��-� Channcls<12 in_ ��zs n I
Depth to fret �•ater in pit: � inchts FAC NeutraL• ye na Water-stainzd L,ea�'es yes no
ih to sacuraied soit: '- inches �
Checl:all chat apply&e�plain belou�: O�hu(explain):
Sveam,Lake or gasc data:
Aerial hotoora hs: Other:
Wetland hs�drolo��• present? res no �
Rationale for dccision/R�marks:
�.�_� E't`�.��.� `�'' ���-- �����",
SOILS I
�'ap Uni� '�ame DrainaQe C}ass
crics � Phase)
Field observations confirm Yes No I
LTaYonom�� (sub�roup) map�d type? � '
Profile Description i
D{pth Horizon Matnx color '•�lottlz colors �tott{z �bundance Textur�,concrztion�, Drs���in, of soil I
(inches) (Munscl] {Mun�cll size 8: contrast structurc,etc. profilr
moist) moist) tmatch d�tcri�tion► '
f'� —t � , . ��T�Z� � S c, .
I i
I � ,
��
H��dric Soil Indicators: (chcck all that appiv}
�
Hisrosol Matrix chroma _< ? with mottlzs
Histic Epipedon M�or Fe Concrctions I
Sulfidic Odor High OrQanic Content in Surfacc L���cr of Sandv Soils �I
Aquic Moisture Regime Or�anic Strtakin� in Sand;• Soils
i R��ucinQ Condi�ions Listed �n \ationaVLocal H��dric Soils Li�t
� Gltvtd or Lo«•-Chroma{_�) matri� Other ftxD�a�n in remarks)
H��dric soiLS present' ��es no
Racionalt for decision/Remarks:
�;�etiand Determination (circle)
Hydroph}•tic vtRetation present? yt�'s n�
Hydric soiis present? yes no Is the samplir.� poin[ �ts no
�'�tland h�•drolo�v resent^ es no u�ithin a wetland^
RaeonalelRemarks:
(�" 9� . •i�i'�1� '
��'��� 0 . ��'�-d'h2"�
NOT£S:
Revised 4l97
D,�T� FOR�t 1 (R�vued)
Routine�Yetland Determination
(«.�State «'etland Delineation Manual or
1987 Co s «e[land Deiineation'.�an�sall
P:v;c��Is��c: ;` ; � Datz: �� � �
f/� �,�-�� � /�`J u-
� � �
, r„ ' County: �
Applic�nUou�tr: �_� , ,,�n�
s Sc�te_ ���
i In«sti�_atoris): �- �fi'�—� S�T'R�
Do?�c�rmaJ Cir:umstan�e�ezist on tht sitc:' ''�ts' no Communit� ID: , , '
Is thc site si�nificantl��di�[urbcd (at�piczl si[uationi�.' v�; po� ' Transect ID: „ ., �
Is thc zrea a potrntial Problcm Area? }�es o'- ,, Plot ID: � �� � V
Ezvlanation of an� ic:al or roblem area: �� :
�'EGETATION (For strata, indicate T=vee: S =shrub_ H =htrb:V=vine)
Dominant Ptant 5 ccies Strawm �c co�cr Indicator pominant Plan[ S�ccies Stratum �ic co�er Indicata;
I ,J �� �1� � � �
� ; , i � i/ �'
Y1 l/ � .
; �u �.�N
! � � .�� 1 �:, �-�� -��- ��
,
,
�-��� �'��.- , �-- � � �-w
� �.�� �� � �-��
'� tJ
H1"DROPEIITIC�'EGETATIO'�I�DIC�TORS:
�•�..
:�of dominants OBL, F.�CK',� F�C ��C `
Chcck al3 indicators that appl}• 8: t�plain beio«�: '"
Visual obser��ation of plznt species�ro«�in�in Phvsiolo�ica]lrepraductit•e�daptatiorts
area.�of prolaaged inundationl;�turatior «�ztland plan�database
hSotphological adaptations Pzrsona{ know{cd=c of resional plant commur.i[ies
Trhnical Literaturc O[hcr(exptain)
H��droph��tic vegetation presenc? �-es- no
Ravonalc for dccision/Remari:s:
Hl'DROLOGY
ls i[tht gro��ing season^ t�s no u'attr Marks: �•es o Szdiment Dzposits: ves' no
����(-�Q% on
Bascd on:�soil �emp(record temp ) Drift Lines: �•cs no Draina�e Pac�erns: �e .o0
othzrfcx taint
Dcgt.�of inundation: � ---� inches Ozidi2�d Root(ii�•c roo Local $oil Surve��. e no
Channtls<i2 in. vzs n
Dcpth to fret �•ater in pir. � in�fies FAC Neutral: - yes no Wa�er-stained Lea�•es y ao
� Dc th to saturted soii: inches
ICheck alt ahac apply &ecplain belo��: O[hcr lezplain):
i Stream,Lake or gage da[a:
Aeria1 hotQ�ra hs: Other�
�''ei�and h�'drolog.��present? ', }'es, , no
Rationale for decision/Remart;s: �j '�
I
i
SOILS I
Map Uni� �ame Draina�e Class i
Scrics 8 Phase) �
Fie]d obsetti�ations confirm Yts T'o �I
Taxonom•� (suborou�) ma �d tv e?
Profile Descriprion
Depth Hori2on Macrix color Moctle colo:� �loctle abundance Texture,coneretior.c, Dr����in� oi soii '
(inches) (Munsell (Munset! size 8: contrast strUcture.etc. profiiz
� moist) moist) tmatch dcscription�
b—14�5 .�r,�,� S � ���- -
l J`��� '?�-°
��:-u.J�--��.:Q
� �� �
� ,
1 � `"�j
� � i
�,
Hvdric Soil Indicators: (ch�ck all trtat apply) ''
Histoso} Matrix chroma <_? wich mottlzs
Histic E?ipedon M� or Fe Concr�tior.s
Sulfidic Odor Hieh Or�anic Contcnt in Surf'acc L���cr of Sandv Soits
Aquic Moisture Regime Or�anic Strc�kinQ in Sand�� Soils
+ R�ducinQ Co�ditions Listed on \atianal/Local H}�dric S��ils Li>t
G{�vzd or Lo�v-Chroma(=1) matrix Other(ex�lain in rcmarks?
T���dric soiLs present:' ves no
Rationalt for decisionlRernarks: �
Y�
t
�;'etland Determination (circle)
Hydraph�tic ve�etation prcsent? �� no
Hydcic soils prtsent? no Is the samplin� point �ts no
V4'zttand h�•droio^_v resent? s no ���ithin a wetland°
RationalelRemarks:
NOTES:
Revised 4191
�
DATA FORM 1 (Revised)
Routioe R'etland Determination
(WA State Wetland Delineation Manual or
1987 Cor s Wetland Delineation Maoual
ProjecdSite: ����f ���� Date: 1)/� /O�
� � l
Applicant�owner:� Co�u►ry:
State:
Investi ator s : �, S/T/R:
Do Normal Circumstances exist on the site? y "s no Community ID:
Is the site significantly disturbed(atypical situation)? yes Transect ID: ���/ U
Is the azea a potential Problem Area? yes no Plot ID:
E lanation of a ical or roblem area:
`'EGETATION (For strata,indicate =tree;S= b;H=herb; =vine)
Dominant Plant S ecies Stratum %cover Indicator pominant Plant S ecies Stratum %cover Indicator
OD
� ' /� ���
GU-t,c-C� �'-�- �� c� � . •
HYDROPHYTIC VEGETATiON II�IDICATORS:
°/a of dominants OBL,FACW,&FAC �
Check all indicators that apply&explain below:
Visual observation ofplant species growing in Pt►ysiologicaUreproductive adaptations
areas of prolonged inundation/saturation Wetland plant database
Morphological adaptations Personal knowledge of regioaat plant communities
Technical Literature Other ex lain)
Hydrophytic vegetation present? yes no
Rationale for decision/Remarks:
HYDROLOGY
� Is it the�owing season? yes � Water Marks: yes n Sediment Deposits: ye o
ion
Based on:����soil temp(record temp_� Drift Lines: yes no � Drainage Patterns: yes o
other(ex lain)
Dept.of inundation: �`—' inches Oxidized Root(live ro°� Local Soil Survey: yes o
y-. ,.= Channels<12 in. es lnd
Depth to free water in pit: inches �"`''� FAC Neuh�al: yes n Water-stained Leaves yes
Depth to saturated soil: �"` inches U
Check all that apply&explain below: Other(e�lain):
Stream,Lake or gage data:
Aerial hoto hs: Other:
Wetland 6ydrology present? yes no
Rationale for decision/Remarks:
sor�s
?�1ap Unit Name Drainage Class
(Series & Phase)
Field observations confirm Yes No
Taxonom (subgrou ) ma ed e?
Profile Description
Depth Horizon Matrix color Mottle colors Mottle abundance Texture, concretions, Drawing of soil
(inches) �vlunsell ('viunsell size&contrast structure,etc. profile
moist) moist) (match descri�ption)
:
�--a �%- IO 92?� --�' --_
.
��. � � . �����
. �
l�ydric Soil Indicators: (check ail ihat apply)
Histosol Matrix chroma<_2 with mottles ,
Histic Epipedon Mg or Fe Concretions '�
Sulfidic Odor High Organic Content in Surface Layer of Sandy Soits
Aquic Moisture Regime Organic Streaking in Sandy Soils
Reducing Conditions Listed on NationaVLocal Hydric Soils List
Gleyed or Low-Chroma(=1 matrix Other ex lain in remarks
Hydric soils present7 yes o
Rationale for decision�Remarks:
Wetland Determination(circle)
Hydrophytic vegetation present? yes ino. �
Hydric soils present7 yes � Is the sampling point yes ,no
Wetland h drolo resent? es ' no ` within a wetland?
Rationale/Remarks:
NOTES:
Re��ised 4/97
D:�T.a FOR,\1 1 (Revised)
Routine��etland Determination
(«.a State t�'eitand Delineation Manual or
1487 Co s �t-eiland Delineation 1VSanuaU
P,-u;cct/sitc: / �2ao � oait: `l /�/b , /
L� L �7
applicanVowTcr. � Count)': � , • /`���'�(.J
,�p " St�te: �'�� �
+ tmcsii��lor(sl: C...--`" SiT/R:
Do!'�c�rmal Cir:umstanccs txist on th�site' z� no Comrnunii�� ID: � .:
Is thc sice si�nific�rnf}�dis►ur�d(ac�pic�l si[uation��.' ves no —� Transrcc ID: �_ � �
Is thc Zrea a potemial Problcm Area' ye� ne �� Plot iD: �✓ _
�colanation of an�pical or roblcm arca: ✓5�
�TEGETATIOI` {For st:ata. �ndicate T=vee: 5 =shrub: H =hcrb; V =vinc) I
Dominant Piant S �cies Stratum 9c co�er indicator pomiaant Plant S�cties Stratum 9c co��er lndicator �
;
i
�� , �'2Z-�s � .�� � ,
, � � S �
✓
�
I t-�- -� ���
, � , �
� , , s 1 � ���:
�
Y-,�,;,�_ �---�- 7- ��-w'
—
� � � �,v-�-s N--�� I �=�
DROPKITIC�'EGETATIOti ItiDIC�TORS:
2 of dominans OBL.F�C�', � FaC�
Check all in�icators that apply g ��plain belo«': �
Visaal obsc��ation of plant soc:i�s oro�L•in�in Phvsiolo�icaUreproducti�•e adaptations
arcas of prolonged inundation/�atur�tion «�t[land plant daiabase
hfo�hological adapta[ions Pzrsonal knowledge of re�ional plant commur.itics
T�'hnical Litzrature Othcr(explain)
H��droph}�tic vegetation present:' .•es no -
Rationalc for dccision/Rcmar�:s:
HI'DROLOGY
ls it che gro��;ne se�sor' �-cs no V�'at�r Marks: �es �Yo Stdimtnt Dzposits: ya no
on
Based on:�soil temp(r�cord ttmp ) Drift Lines: >�cs ;�o Dr�ina_c P:,tterns: �•es o0
othtr fex lain) _
Dept_of inandation: -�– inches Oxidizcd Root(ii��e rooi Local Soil Surve��: yt nu
��y-�� Channeis<12 in. ves no
Dtpth to fr�z w•atet in�pit: inchts � �(� FAC I�+cutral: }es o Watzr-stained L.ea�•es ye no
th to saturated soil: `D��inches ��f�
Chcck afl that apply &c�plain bekow�: Othcr(ezplain):
Su-cam,Lake or ga�e daca:
Aeriai hoco�ra hs: Other:
Welland hcdrolog}•present? ��es no�
Rationale for dccisionlRemart:s: •
SO_ ILS !
i
*�tap Unii '�ame DrainaQe C1:ss
>crict �C Ph�e)
Field observations confirm Ye� No
Taronom� isub�roup) ma d tv e''
Profle Descripbon �
I.kpth � Horizon Matrix color '�fottle co{ors �tottl: abundance Texture, concretions. Dra���in_ of soil
f inches) (Munscll (Munscll size 8: contr�st structurc. ctc. prufilC
� m�ist) moist) lmatch dcscri�tionl
�
� - 1�,� �� �fl�R ��� � s �
� � .
HF•dric Soil Indicatots: (chcck all that apply)
Histosol Matrix chroma <_ ? with moales
Hisuc Epipcdon M�or Fz Concrctions
Sulfidic Odot HiQh Or�anic Content in Surface L���er of Sandv Soils
� Aquic 2�ioisture Regime Or�anic Streakin� in Sand}� Soils
' � RzducinQ Conditions Listed on \ationaULocal H��dric Soits Li�t
, Gltvzd or Lo�v-Chroma(=1 matrix Other iex iain in remarl:s)
Ht•dric soiLs present° �•es no
Rati�nalz for decision/Remarks:
�;'ettand Determination (circle)
Hydroph��tic vc�etation presenc'' �� no
Hydnc soils present? yes o Is the samplin= point �es no=
�'etland h�•drolo�v resent? cs o "'ithin a wetland^.
Rational elRe►narks:
NOTES:
Revised 4197
DaT.� FOR�1 1 (Rcvised)
Routine �Vetland Determination
(1t':� State «�etland DcIineation Manual or
1487 Co s «etland Delineation ?�Sanuall
Da►t: f / ���`7'
Fuject/Sitc: ' � �
� �� ��
Applir:inUow�cr: S ' Counry:�� ,
Si51e: 4�'1!" / l��C`Vt.�(J�t/
S�T'/R:
� In�^s�i��tor(s): .
Do!�c�rmaJ Circumstances czist on thc sitc:' ��5 no Communii� ID: � .
i.� �he ciic si�nif,c�nch-di�curbcd (a��pica: situa�ion i.' vti � Transect ID: I /� I� _. .. �
Is thc zrea a potenu�l Prob}em Arca' yei �� ._ Piot ID: •�� � .. _
F�vlanation of an•pi��! or roblem arca: �"�
�"EGETATIOti (For strata, indic�te T=vee: S =shrub: H =hcrb:V=vine)
Dorninan� P:anc S �cics Stratum 9c co��et Indi�ator pominant Plant S�ccics Strasum �'c co�•er Indi�ator
. j - - s� �,�..,
�
.�i'r1 ��. � ( 3� �-{-
� ���. � �I V ) �
,
H1�ROPHITIC �'EGETATIO'� I�DICaTORS:
2 or dominans OSL.F.�Cu',� F.�C ����
Chtc1: all indi,ators that apply h: t�pl�in belo«-: "
Visual obscn•ation of pian[spccics�ro«�in_ in Ph�-siolo�icaUrcproduc[i�•c adap.acions
are�c of prolon�ed fnunda�ion!>atura[ion �l�ttlnnd plant da:abase
fvtorpholo�i:al adaptations Pcrsonal l:nowled=e of re�iona! plant commur.iiies
Technical Licerature Othcr(ex lain)
H��droph.•tic vegetation present'' a no •
Rationalc for dccisionlRcmart:s:
H1'DROLOG�'
Fs it thz gro�ing scason'' �es � �'ater Marks: �es Sedimcn� Dzposits: yes 'no
on
Based on. soil tzmp(record ttmp ) Drift Lines: >�cs o� Draina_� P��terns: }•es no
othtr(ex lain)
Dept.'of inundation: ''— ioches OYidized Root(li�-e roo Loca! So.il Surve�•: yes o
Channels<l2 in.vts '
Dtpth to fr�t w•aeer in pir. '� inchts'���" FAC?veutraL• yes no Water-stainzd Lea�•es yes no
th to sacurated soi}_ ---;nches
Check all tha� appiy&esplain belo��: Othcr(ez.plain):
Strcam,Lakc or ga�c da�a:
Acrial hoto�ra hs: Other:
R'edand h��drolo��� present? �•es no
Rationale for decision/Rtmati:s:
l
)nit '�ar,�e Drainase Class �
;s c� Ph�e)
Field observations con`irm Ye� Ne
T�.Yonom�� (suborou ) ma d tv e''
Profile Descripflon
Lkpth Horizon Ma�rix color 'viotclz colon �lottlz abundance Texture, concretionc. Dr���inR of soil
(inches) (MunseU (Munscll �ize � contrast structure,ete. proi"ilr
� moist) moist) (match dcscri�tionl
� ,�� /6y��Z3�1 �`�
S�f l� � 3 S
1 � � ��
1 �:.,.�
H��dric Soil Indicators: (chcck all that app]y) �
Histosol Matrix chroma <_� with mottics
Hisuc Epipedon M�or Fz Concre[ioas
' Sulfidic Odar Hish Or�anic Content in Surfacc L���er of Sandv Soils
Aquic Moisture Regimz Or�anic Streakin�in Sand}• Soits
Rzducins Condition> Lisced on�aciorta!/Local H�dric S��iis List
� Glzvtd or Lo�v-Chroma(=l matrix Qther(ex lain in remarks) .
H��dric soiLs present? �•es no .
Racionalz for decisionlRemarks:
�;'ettand Determination (circle}
Hydraph��tic vz�etatioo present? � no
Hydric sc�ils present? yes .n Fs the samplin� point �zs �
u'ztland h�•droioRv resent? es o �t�ithin a wetland^ -
Rationai eJRemarks:
ti�TES:
Revised 4/9i
D�T.-� FOR�i 1 (R�vised)
Routine\��eiland Determination
(\�'.a State «etland Deiineaoon Manual or
1987 CorFs ���edand Delineation Manual)
r rvjecUSi�c: � 1 ,� �; !/f Dacz_ I t 1 -7 j � �
J/L�C '�'f�� � !
� APPlir�nJou-ncc ' Coun[y:
Q � St�tc: ���,�p
In�csti_ator(s'�: �n-/rd�0 S�TIR: � J
� Do?:<,rmal Circumscancc�ezist on �hc si►c:' +c� ' no Communit�• ID: �,::
{ is thc sitc sirnifican�f��d;�turb_�d (at��pica? situationi' ycs � Trar.�rct tD: �f l'1 _. ..
Is the area a po�cntial Problem Area�' vcs no �"�'(� Ploi ID: � _ �
:�cvlan�tion of an• ical or robicm area: (1 ,
�'EGETATION (For strata, indicatc T=cree: S = shrub; H =hzcb:V=vine)
Domin�n�P1ant S ccies Stratum �c ce�u [ndicator pominant Plant S�ccics Stratum �ic coti•tr Indi�ator
-- � �'T�.
. c; )' �-1��
� I
't� j� ��� �
2�,,.G.� �f � .��4-�;�..
� '
F-i�'DROPEiITIC �'EGE?ATIO'�I�DIC:�TORS:
��of dominanu OBL,F.�Cv.',S F?.0�
Chcck all indi�ato;s tha�zpp;}•c� explain belo«�: �
� Visual obsen•ation of p:an;soecizs gro�t-in� in Ph��siolaRieaUreproducti�•c adaptations
areas of prolo�ged inundationl:a[�rat,on «'ztland plant database
hlorphoio�i�al adaptations Ptrsonal knowlcdge of re�+onal plant commur:i�ies
Technical Lic�rature Other(eY lain)
Hti'droph}�tic vegetation present? res no •
Ra:ionale for decision/Rcmarks:
HZ'DROLOGY
Ls it thz gro��ir.� scason�' ��ts no �"a[er Mar►s: vcs no Stdimznt Dtposiu: yes no
on
$ue�on:���soil temp(record tcmp ) Drift Lines: ��es no Drair.a��e Pa�terns: ��es no
other(ex lainl
Dcpt of inufid�tion: �' inches OYidized Root(li��c root Local �oil Surve�-: yes no
`n �,� �, Channels<12 in_�•es n
Dcpth ro fret u•ater in pit: � inchts'I' w T"`� FAC Neutrai: yes no �ra�zr-stainzd Lea�-es ye no
th to satura�cd soil: �— inchcs
Ch�ct;all that apply &e�plain below�: O�her(ezptain):
Stream,Lake or ga�e data:
Atrial horoora hs' Other'
W�tland h�'drolo��' preseni' ��es no
Rationale for decision/Remarl:s:
SOILS i
�1ap Unit '�ar�e Draina�e CIass
Series 8: Phase)
Field observations confirm Ye� No
?azonoR,�• (suborou ) ma aed t e''
Profile Descrip�on
Dzpth Hori2on Ma[rix color Mottle colors �lottl� abundance Ttxture, concrttion<. Dr.����in� of soil
(inches) (Munsell (Munsetf size g contrast structure, ttc. profilt
� moist} moist) lmatch dcscrintion�
�=7� �,5� 3 - - ��,�,
I
� �
� .
H��dric Soi! Indicato�s: (chcck all that apply)
Histosol Matrix chroma <_? with mottles
Histic Epipedon Mg or Fe Concretions
Sulfidic Odor Hiah Or�anic Contcnt in Surfacc La��er of Sand�� Soils
Aquic Moisture Rc�imz Oraanic Strt�kina in Sand�� Soils
I Rtducina Conditions Listed on \ationaULocal H�dric S��iis Li�t
Glzvtd or Lo�v-Chroma(=1) matrix Other(z� lain in remarks)
H��dric soils present' }�es o _
Rationalz for decision/Remarks:
«'etland Determination (circle)
Hvdroph��tic vc�etation present° ycs no
Hydric soils present? yes . Is the samplin= point �zs no
Vr'zttand h�•drolo�v resent? vcs ��-ithin a wetland'.
Rationaie�Remarlcs:
tiOTES:
Re�zsed 4/97
APPENDDC 2
WETLAND RAT[NG FORM - WF�SST�R.N v�J�SHIf�1GTOi�1
(DR.AFr - AUGUST 2004)
�
�
�
Page 11
WETLA�'VD R.ATING FORM-�'VESTERN WASHINGTON
I�Tame of wetland (if known}: f/�/2��G(�,t_/� �- �(it/-7 I��.�,1} [�-/`7 ��L'`�'-
Location: SEC: _TWNSHP: _RNGE: _(attach map with outline of wetland to rating form)
Person(s} Rating Vti'etland: ��o� Affiliation: V✓�s Date of site visit: ��S/0 �'
���7' �����1'��' ��+ �r',���s
��tego�-y �ias�� on 1�C'T�ONS providecl by wetland
I 1? �II I�I
Score for W ater Quality Functions /�,(� I
Category I= Score >70 � �„�
Category II= Score 51-69 Score for Hydrologic Functio�ls
Cate�ory lli= Score 30-50 Score for Habitai Functions �(J
Cate�ory Il�' = Score < 30 TOTAL score for f'unctions
Z
Category b�sec� on SI'�C�I, C�AC'�'��S'I'ICS of��etland
I II Does not Apply
�'�a� C�$�gOry (choose the "highest" category from above) �
Check thc appropriate h-pc and class of wetland being rated.
}�`�r:a - �- ,R �,
!�la ''.,�i �)3-i - � ii k" ..d., .
Estuarine De ressional
Natural Herita e Wetland Riverine
Bo Lake-frin e
Mature Forest Slo e
Old Growth Forest Ftats
Coastal La oon Freshwater Tidal
Interdunal
I�Tone of the above
V�Tetland Rating Form—western Washington , 1 August 2004
Does the �i-etland being rated meet any of the criteria belov��?
If�ou answer YES to any of the questions below you will need to protect the ��etland
according to the reoulations regardina the special c4�aracte�ristics fot�nd in the wetlaild.
- Cl�eck Li�t f�i• «'etlantls Ti�at�eed SpeciaE Pratection, and ' "Y�S, � I\TO �
, :, ' '.,- ,.: Tliat Are 1\ot lncl�ded in:tl�e Ratin� : �: , ` =�
SPl. �QS IjI�' lf-'Ellc:lliX bfti2�7�0:'Li1)ie?;Ieti uS G' /'.C1Jiii11 JO1'Q3;1`CE'L1eI'Ll;il' liSted
Threatened or Endangered plant or anirnal species (T;/E species)?
For the purposes of this rating systein, "documented" means the w•etland is on the i%
appropriate state or federal database.
SP2. Has the wetland 6een documented as habitat for any State listed 7'hreatened or
F,ndar�gered plant or arimal speeies? v� ,
For the purposes of this rating system, "documented" means the wetland is on the
appropriate state database.
SP3. Does the wetland contain individuals of Prioriry species listed by the 1�DFY�' �
for the state? ��'� �
I
SP4. Does the ivetland have a local signif cance in addition ta its functions? For
example, the wetland has been identified in the Shoreline Master Program, t,��
the Critica] Areas Urdinance, or in a local management plan as having
special si�nificance. �
To complete the next pat�t of the data slieet vou will need to dete�•mine the ,
Hydro eg- omorphic Class o�the wetland bein rg ated•
The hydrogeomorphic classification groups wetlands into those that funetion in similar ways. Tlus
siinplifies the questions needed to answer how well the wetland functions. The Hydrogeomoiphic
Class of a wetland can be determined usu�g the key Uelow. See p. 24 for more detailed instructions
on classifying wetlands.
i ,
Wetland Rating Form—westem��ashington 2 August 2004
,
Classification of Vegetated VVetlands for Western Washington
w'efland'Vame: D�te:
l. ar i �Tater levels in the wetland usually controlled by tides (i.e. except during floods)?
� -0 go to 2 YES—the wetland class is Tidal Fringe
If yes, is the salinity of the water during periods of annual low flo�v belo�v 0.5 ppt (parts per
thousand)? Y�S—Fresh�vatei•Tidal Fringe NO—Salfwater Tidal Fringe (Estuarine)
Ifyour wetland can be class faed as a Fresh�rater Tidal Fringe use the for-ms for Riverine
���etlands. If it is Salhvater Tidal Fringe ii is rated as an Estuarine weiland. Wetlands that
���ere called estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fringe in tlie Hydrogeomorphic Classification. Estuarine��etlands were
c.ategorized separately in the earlier editions, and this separation is being kept in this
revision. To maintain consistency between editions,the terrn"Estuarine" wetland is kept.
Please note, however, that the characteristics that define Category I and II estuarine
wetlands have changed(see p. ).
2. Is the topography within th nd flat and precipitation is only source (>90%) of water to it.
'�O — go to 3 YLS The wetland class is Flats
If your wetland can be classified as a "Flats" wetland, use the foirn for Depressional
���etlands.
3. lloes the vvetland meet both of the following criteria?
___The vegetated part of the wetland is on tl�e shores of a body of open water («-itl�out any
vegetation on the surface)where at least 20 acres(8 ha) are permanently inundated
c:ponded or flooded);
_At least 30% of the open water area is deeper than 6.6 ft(2 m)?
NO—Do to 4 YES—The wetland class is Lake-fringe (Lacustrine Fringe)
4. Does the wetiand meet all of the following criteria?
The wetland is on a slope (slope can be very gradua�,
The water flows through the wetland in one direction (unidirectional) and usually
comes from seeps. It may flow subsurface, as sheetflow; or in a swale without distinct
banks.
The water lea��es the wetland without being impounded?
I`TOTE: Surface�vater does not pond in ihese type o,f�vetlands except occasionally in
i�ery small and shallow depressions or behind hummocks(depressions are usually
<3ft diameter and less than 1 foot deep).
I�TO - go to � YES—The wetland class is Slope
5. Is flie wetland in a valley, or stream channel, where it gets inundated by overbank flooding from
that stream or river? The flooding should occur at least once every two years, on the average,to
answer "yes." ?'he wetland can contain depressions that are filled ti��ith water 1��hen the river is
riot�ooding.
I�O - go to 6 �'ES—The wetland class is Riverine
Wetland Raring Form—westem�'�'ashington 3 AuglTst 2004
6. Is the «-etland in a topographic depression in «�hich water ponds, or is saturated to the surface, :t
soine time of the year. Tlzis memzs ihat any outlet, if present, is higher�than the interior of ihe
��.eiland_
NO—go to 7 �'E� —The wetland class is Depressional
7. Is the wetland located in a very flat area with no obvious depression and no stream or river
rutuiing through it and providing water. The wetland seeins to be maintained by high
groundwater in the area. The wetland may be ditched, but has no obvious natural outlet.
NO— go to 8 1'ES—The wetland class is Depressional
8. Your��etland seems to be difficult to classify. For example, seeps at the. base of a slope ina�� I
grade into a riverine floodplain, or a sinall stream within a depressional ��etland has a zone of
flooding along its sides. Sornetimes we fmd characteristic's of several different hydrogeomorphic
classes within one wetland boundary. Use the following table to identif}�the appropriate class to
use for the rating system if you have several HGM classes present within your wetland. NOTE:
Use this table only if the class that is recommended in the second column represents 10% or more
of the total area of the wetland being rated. If the area of the second class is less than 10% classify
the «�etland usin�the first class. ,
i
HG�'�I Classes.�ithiri n 1�el��zer�Zec�.�Y=ei'lnnd;$putulcti y �i ' Cla�s.tn'`L�r�;iti Ratlii� .z�``,as"
Slope + Riverule Riverine
Slope+De ressional Depressional ,
Slope+Lake-fringe Lake-fringe �
Depressional +Riverine along stream within boundan� Depressionai
Depressional +Lake-frin e Depressional
Salt Water Tidal Fringe and any other class of freshwater T;•eat as ESTUARINE under
wetland wetlands�;Tith special
characteristics
If you are unabie still to determine which of the above criteria apply to your wetland, or you have
more#han 2 HGM classes within a wetland boundary, classify the wetland as Depressional for
the rating_
'�ti'e[iand Rating ro.m—��estern �Va_lungton 4 �ueust''U04
D : �epr,essional and Fl�ts;�'�etlands � � � �.�� 3� :,_ , " y I'��nts _
� _,, - j �.s , r =_ r , 4 . � ,�
_' , � ��. .� .- � ..-, _>. — !�a;c r. �2_ _ .�. :=�. a�__�.�
, WA��ER(�L;ALITY FU�CTIO�TS -.lndicaiors that �:etland fiinctions to:inipr�ve� '
water quality
D D 1. Does the wetland have the n�tential to improve n�ater quality? (see p. 38) '- G
_ . .
D 1.1 Characteristics of surface water flows out of the wetland:
D Wetland is a depression with no surface water outlet points =
Wetland has an inte:�mittently flowing, or highly constricted, outlet points �2
Wetland has an unconstricted surface outlet points = 1 i
Wetland is flat and has no obvious outlet and�'or outlet is a ditch points= 1
D 1.2 The soil 2 inches below the surface is clay, organic, or smells anoxic
D (hydrogen sulfide or rotten eggs).
YES points�
NO oints = 0
D 1.3 Characteiistics of persistent vegetation (emergent, shrub, and/or forest class):
D V�'etland has persistent, ungrazed, vegetation> = 9�% of area points�
Wetland has persistent, ungrazed,vegetation > = 1/2 of area points 3
;� Wetland has persistent,ungrazed vegetation>= L'10 of area points= 1
'I Wetiand has persistent, unexazed vegetation<1/10 of area points= 0
D1.4 Characteristics of seasonal ponding or inundation.
D This is the area of the wetland thar is ponded for at least 2 months, but dries out
sometime during the year. Do not count the area that is permanently ponded.
Estimate area as the average condition 5 out of 10 yrs. �i
Area seasonally ponded is> '/z total area of wetland points=� I
Area seasonally ponded is> 1/a total area of wetland points= 2 '�
Area seasonally ponded is< 1/o total area of wetland points= 0 ��
NOTE: See text for indicators of seasonal and permanent inundation.. ,
]� Total for D 1 Add the points in the boxes above ,� � �
D D 2. Does the wetland have the opportunity to improve water quality? (see p. 44)
Answer YES if you knorv or believe there are pollutants in groundwater or surface
water coming into the wetland that would otherwise reduce water quality in
streams, lakes or groundwater downgradient from the wetland?Note which of the
followin conditions provide the sources of pollutants.
�azing in the wetland or within 150 ft
� Untreated stormwater discharges to wetland
— Tilled fields or orchards within 150 ft of vvetland
— A stream or culvert discharges into wetland that drains developed areas,
residential areas, farmed fields,roads, or clear-cut logging
— Residential,urban areas, golf courses are within 150 ft of wetland multiplier
— Wetland is fed by groundwater high in phosphorus or nitrogen �
Other
YES multi Iier is 2 NO multiplier is 1
. D TOTAL -Water Quality Functions Multiply the score from D1 by D2 �('
Add score to table on . i �-�
VJetland Rating Form—westem Washington 5 Augusi 2004
, ].� Depresslonal ancl Flats ��'etla»d� . r: �� � ;d# P�ints
�,.. �a �: -� , �,� ,�: .� , -
r . �>,� ��. ,-. ..=� x .,��.>;�. _. .,..�r�.:
" HYBRQLOGIC�FUNCT���TS�- Indicators that weflat�d functioiis`fa ieduce��
� � � . � „ ;
nooding and stream de, adation _ ;. '�
ll 3. Does the w�etlaod ha�°e the potential to reduce flooding and erosion? �" .',
(see . 46 - - _
D D 3.1 Characteristics of surface water flows out of the wetland
Wetland has no surface water outlet points=4
Wetland has an intermittently flowing, or highly constricted, outlet points �
Wetland is flat and has no obvious outiet and/or outlei is a small ditch points `�� �}
Wetiand has an unconstricted surface outlet oints=0 d—�
D D 3.2 Depth of storage during wet periods
Estimate the height of}�onding above the bottom of the outlet
Marks of ponding are 3 ft or more above the surface points= 7
The wetland is a "headwater"wetland" points= 5
Marks of ponding between 2 ft to <3 ft from surface points —
Marks are at least 0.5 ft to<2 ft from surface points�
Vb'etland is flat but has smail depressions on the surface that trap water points= 1 �
Marks of ponding less than 0.5 ft points=0
D D 3.3 Contribution of wetland to storage in the watershed '
Estimate the ratio of the area of upsiream basin contributing surface water to the
wetland to the area of the wetland itself
The area of the basin is less than 10 times the area of wetland points= 5
The area of the basin is 10 to 100 times the area of the wetland points � 3
The area of the basin is more than 100 times the area of the wetland points— 2
Wetland is in the FLATS class (basin =the wetland, by defmition) points = 5 J
D Total for D 3 Add the points in the boxes above
D D 4. Does thc wetland have the opnortunitv to redace flooding and erosion?
(see p. 49)
Answer YES if the wetland is in a location in the vvatershed where the flood
storage, or reduction in water velocity,it provides helps protect downstream
property and aquatic resources from flaoding or excessive and/or erosive flows.
Answer NO if the vaater coining into the wetland is controlled by a structure such
as flood gate,tide gate, flap valve,reservoir etc. OR you estimate that more than
90% of the water in the wetland is from groundwater.
Note which of the following indicators of opportunity apply.
—JWetland is in a headwater of a river or stream that has flooding problems
�� Wetland drains to a river or stream that has flooding problems muitiplier
— Wetland has no outlet and 'unpounds surface runoffwater that might
otherwise flow into a river or stream that has flooding problems �
ther
�E multiplier is 2 NO multi lier is 1
D TOTAL -Hydrologic Functions Multiply the score from D 3 by D 4 r
Add score to table on p. 1 � �
Wetland Rating Form—westem Washington 6 August 2004
Tli�se.ques�ians a�pl,�> ta »�etlrrrifls o,f'rc11,�4"�,c�'1 cluss�s.e-' � �`��"��" � _§��z �Y ,,�-��.�'���fs :i
-< � ._ � ,.. <r�:'� -�:� _�,_.<_.. . _-_ - -�_. F.�. u�� ������, �' 3�
„.� � z- -��, , ,
, .
-----: _ _. _ __. . .._ .r�< __• . _ _ _ __ .r_ .F,� .,. ,s ._ 3..�z::
Z-3A13ITAT FLJIvTCTI01�`S -Indicators that u�etland lunctions to prc�<<ide'iii�partant haliitat
H 1.Does the wetland ha��e the potential to pro��de habitat for many species?
H 1.1 Ve�etation structzu�e (see p. 72) �
Check the types of vegetation classes present (as de�ned by Cowar•din) if the class
covers more than 10% of the area of the ��etland or '/ acre.
�Aquatic bed
� �mergent plants
) Scrub.�shrub (areas «�here shrubs have >30%cover)
i Forested(areas where trees have >30% cover)
Forested areas have 3 out of 5 strata(canopy, sub-canopti, shrubs,herbaceous,
moss/ground-cover)
Add the number of vegetation types that qualify. Ifyou have:
4 types or more points =4
3 types points—
2 types points� '
1 tvpe points=0
H 1.2. Hvdroperiods (see p. 73)
Check 1he t}�pes of water regimes (hydroperiods)present within the wetlana'. The
waier regime has to cover mo�•e than 10%of the wetland or '/a acre to counl. (see text
for descriptior�.r of hydroperiods)
�Permanently flooded or inundated 4 or more types present points =��
�Seasonally flooded or inundated 3 types present points
�Occasionally flooded or inundated 2 types present point= 1
Saturated only
Permanently flowing stream or river in, or adjacent to;the vvetland
Seasonally flowing stream in, or adjacent to,the vvetland Y
Lake fringe wetland =2 points
Freshwater tidal wetland=2 points
H 13. Richness af Plant Species (see p. 75)
Count the number of plant species in the wetland ihat cover at least 10 ft2. (different
patches of the same species can be combined to meet the size threshold)
You do not have to name the species.
Do not include Eurasian Milfoil, reed canarygrass,purple loosestrife, Canadian
Thisile
If you counted: > 19 species points =2
List species below ifyou want to: 5 - 19 species points �1
<5 species points=0
�
VJetland Ratine Form—�uesrern�T�'ashinelon 13 August 2004
�
I
H 1.4. Interspersion of habitats (see p. 76)
Decide from the diagrams below'whether interspersion between types of vegetation
(described in H L 1), or vegetation types and unvegetated areas (can include open '
water or mudflats}is high, medium,lov��, or none. �
: � _ _ _ �
, ,
None= 0 points Low= 1 point Moderate=2 points
;
, : . . :
� ,
�� ,.� ��
� � `� _± ;-
fr:
_ �� 1 � �:.
� �
� ;. ��� �
\ } �
�� [riparian braided channels] �
High =3 points
NOTE: If you have four or more vegetation types or three vegetation types ��
and open water the rating is always "higJi".
H 1.�. �ecial Habitat Features: (see p. 77)
iCheck the habitat feaiures that are present in the wetland. The number of checks is �
the number of points 1�ou pui into the next column.
Large, downed, woody debris within the wetland(>4in. diameter and 6 ft long).
I Standing snags (diameter at the bottoin>4 inches) in the wetland
Undercut banks are present for at least 6.6 ft (2m) and/or overhanging vegetation
'I extends at least 3.3 ft{lm)over a stream for atleast 33 ft (lOm)
Sta le steep banks of fine material that might be used by beaver or muskrat for
nning (>3Qdegree slope) OR signs of recent bea`er activity are present
IAt least 1/4 acre of thin-stemmed persistent vegetation or woody branches are present
in areas that are permanently or seasonally inundated(structures for egg-laying by
amphibians) !
Invasive plants cover less than 2S% of the wetland area in each stratum of plants
H 1. TOTAL Score - potential for providing habitat
Add the scores in the column above
�� Comments
�
�
�
I
Wetland Rating Form—westem Washington 14 August 2004
I
�
H 2. Does the wetland have the o ortuni to ro�zde habitat for man s ecies? �'� ° �°� ��"�
PP h' P Y P �� �.��
_ �. _ ._ .._._.._�
H 2.1 Buffers (see p. 80j
Choose the description that best represents condition of buffer of wetland. The highest
scoring criterion that applies ro the x�etland is to be used in the rating. See text for �
definition of"undisturbed."
— 100 m(330ft) of relatively undisturbed vegetated areas, rocky areas, or open water
>95% of circumference. No developed areas within undisturbed part of buffer.
(relatively undisturbed also means no-grazing) Points= 5
— 100 m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
>50°io circumference. Points =4
— 50 m (170f�)of relatively undisturbed vegetated areas, rocky areas, or open water
>95% circumference. Points= 4
— 100 m(330ft)of relativel��undisturbed vegetated areas, rocky areas, or open water
> 25% circumference, . Points = 3
— SO m(170ft) of relatively undisturbed vegetated areas, rocky areas, or open water
for> 50% circumference. Points = 3
If buffer does oot meet any of the criteria above
— No paved areas (except paved trails) or buildings within 25 m(80ft) of wetland>
95°�o circumference. Light to moderate grazing, or lawns are OK. Points = 2
— No paved areas or buildings within 50m of wefland for>50% circumference.
L'� t to moderate grazing,or lawns are OK. Points =2
— eavy grazing in buffer. Points = 1
Vegetated buffers are <2m v�7de (6.6ft) for more than 95% of the circumference
(e.g. tilled fields,paving, basalt bedrock extend to edge of wetland Points=0.
— Buffer does not meet any of the criteria above. Points = 1 �
H 2.2 Corridors and Connections (see p. 81)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor (either riparian or upland)that is at least 150 ft wide,has at least 30% cover
of shrubs, forest or native undisturbed prairie,that connects to estuaries,other
«+etlands or undisttubed uplands that are at least 250 acres in size? (dams in riparian
corridors, heavily used gr•avel roads,paved roads, are considered breaks in the
COi7'IC�OY�.
YES =4 points (go to H2.3) NO=go to H 2.2.2
H 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor(either riparian or upland)that is at least SOft wide,has at least 30% cover of
shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands
that are at least 25 acres in size? OR a Lake-fringe wetland, if it does not have an
undisturbed corridor as in the question above?
YES =2 points (go to H2.3) I�O=H 2.2.3
H 2.2.3 Is the wetland:
within 5 mi (8km) of a brackish or salt water estuary OR
within 3 mi of a large field or pasture(>40 acres} OR �
within 1 mi of a lake greater than 20 acres?
YES = 1 point O 0 oints
Vl'ettand Rating Form-western�T�'ashington 15 August 2004
H 2.3 Near or adtacent to other prioritv habitats listed b� VJDFVV (see p. 82)
W'hich of the following priority habitats are within 330ft(100m) of the wetland?
(see tezt for a more detailed description of these priot-it}�habitats)
Riparian: The area adjacent to aquatic systems with flowing water that contains
elements of both aquatic and terrestrial ecosystems which mutually influence each other.
Aspen Stands: Pure or mixed stands of aspen greater than 0.8 ha(2 acres).
Cliffs: Crreater than 7.6 m (25 ft)high and occurring below 5000 ft. 1
Old-growth forests: (Old-growth west of Cascade crest) Stands of at least 2 tree
species, forniing a multi-layered canopy with occasional small openings;wi#h at i
least 20 trees/ha(8 treesiacre)> 81 cm (32 in) dbh or>200 years of age. �
Matnre forests: Stands with average diameters exceeding 53 cm(21 in) dbh; crown
cover may be less that 100%;crown cover may be less that 100%; decay,
decadence,numbers of snags,and quantity of large downed material is generally
less than that found in old-growth; 80 - 200 years old west of the Cascade crest.
Prairies: Relatively undisturbed areas (as indicated by doininance of native plants)
where grasses andlor forbs form the natural climax plant community.
Talus: Homogenous areas of rock rubble ranging in average size O.IS - 2.0 m(0.5 -
b.5 ft), composed of basalt; andesite, andlor sedimentary rock, including riprap
slides and mine tailings. May be associated with cliffs.
Caves: A naturally occurring cavity,recess, void, or system of interconnected
passages
Oregan white Oak: Woodlands Stands of pure oak or oak/conifer associations
where canopy coverage of the oak component of the stand is 25%.
Urban NaturaI Opeu Space: A priority species resides wzthin or is adjacent to the
open space and uses it for breeding andlor regular feeding; and/or the open space
functions as a corridor connecting other prioriry habitats, especially those that
would otherwise be isolated; andlor the open space is an isolated remnant of natutal
� habitat larger than 4 ha(.10 acres) and is surrounded by urban development.
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal wetlands,usually
semi-enclosed by land but with open,partly obstructed or sporadic access to the
open ocean, and in v��hich ocean water is at least occasionally diluted by freshwater
runoff from the land. The salinity may be periodically increased above that of the
open ocean by evaporation. Along some low-energy coastlines there is appreciable
dilution of sea water. Estuarine habitat extends upstream and landward to where
ocean-derived salts measure less than O.Sppt. during the period of average annual
low flow. Includes both estuaries and lagoons.
Marine/Estuarine Shorelines: Shorelines include the intertidal and subtidal zones
of beaches, and may.also include the backshore and adjacent components of the
terrestrial landscape (e.g., cliffs, snags, mature trees, dunes,meadows)that are
important to shoreline associated fish and wildlife and that contri�ute to shoreline
function(e.g., sand/rock/log recruitment;nutrient contribution, erosion control).
If wetland has 3 or more priority habitats=4 points
If wetland has 2 priority habitats=3 points �
If wetland has 1 priority habitat= 1 point No habitats=0 points
Wetland Rating Form—wes#em Washington 16 August 2004
H 2.4 «'etland Landscape ("choose the one description of the landscape around the
wetland that best fits} (see p. 84)
There are at least 3 other wetlands within %2 mile, and the connections between them
are relatively undisturbed (light grazing between wetlands OK, as is lake shore with
some boating, but connections should NOT be bisected by paved roads, fill, fields,
or other development. points= 5
The wetland is Lake-fringe on a lake with little disiurbance and there are 3 other lake-
fringe wetlands within 1/z mile points=5
There are at least 3 other wetlands within 1/z mile,BL"T the connections between t�
are disturbed points�3)
The wetland is Lake-fringe on a lake with disturbance and there are 3 other lake�
fringe wetland within 1/2 mile points=3
There is at least 1 wetland within 1/2 mile. � points=2
There are no wetlands witivn '/�rnile. points= 0 �
H 2. TOTAL Score - opportunity for providing habitat
Add the scores in the column above 3
Total Score for Habitat Functions —add the points for H 1,H 2 and record the result on
p. 1 �D
,
V�'etlane Rating Form—«�estem«'ashington 17 August 2004
�
� a
�
I
CATEGORIZ:ATION BASED ON SPECLAL CHARACTERISTICS
Please defermine if the wetland meets the attributes described below and circle the
appropriate answers and Category.
�etland T��Pe :� • _ ... '_ : : = � = :;= �; _CategorS �
� Ch�ck.�off a�z}� cr•itet�ia tlint a��7��to the iti�etlaiic�:�� Cit•c�e�tlie��rppropriute Categori'
�;�hctt tlte a ro rirtte criterirr aj-e ntct. ; : > ._ . -
SC 1.0 Estuarine wctlands (see p. 86)
Does the wetland meet the following criteria for Estuarine wetlands? ��{-
— The domi.nant water regime is tidal, �
— ti egetated,and �"-'
— VVith a salinity greater than 0.5 ppt.
YES = Go to SC 1.1 I�TO
SC 1.1 Is the wetland within a National Wildlife Refuge,National Park,
National Estuary Resen�e,Natural Area Preserve, State Park or Educational, Cat.I
Envirorunental,or Scientific Reserve designated under WAC 332-3�-151?
YES = Categorv I NO go to SC 1.2
SC 12 Is the wetland at least 1 acre in size and meets at least two of the
following three conditions? YES =Category I i�'O= Category II Cat. I
— The w�etland is relatively undisturbed (has no diking, ditching,filling, Cat. II
cultivation; grazing, and has less than 10% cover of non-native plant
species. If the non-native Spartina spp. are the only species that cover
more than l 0% of the wetland, then the wetland should be given a dual Dual
rating (I/II). The area of Spartina vvou.id be rated a Category II while the rating
relatively undisturbed upper rnarsh with native species would be a �
Category I. Do not,however, exclude the area of Spartina in
determining the size threshold of 1 acre.
—At least 3/4 of the landward edge of the wetland has a 100 ft buffer of
shrub,forest, or un-grazed or un-mowed grassland.
— The wetland has at least 2 of the foilowing features: tidal channels,
depressions with open water, or contiguous freshwater wetlands.
.,:.:'sY��.,�t'_..-�.:-,r�..d..u,:.:.._-K ,�:��:ti�..Y.-r�,.�::•'r ,h»...av.�:� _.Y,:�..c'; >s'�:....r � ::4.!'.-!�,..aa. �'1;`.�:" ��7w x ,.t� �'P F',°�. �`n„ .k;�.
Wetland Rating Form—western Washington 18 August 2�04
i
V4'ETL��RATING FORI'�Z—�'�'ESTER'v WASHINGTON
y�. ' -�j� �"' �, . i � /
Name of wetland(if known}: i/�,��// f(�/�,�� �/ E LL�' / S i �'f;c� ,�,�_
Location: SEC:_TV4NSHP:_RNGE: _(attach map with outtine of wetland to rating form}
Person(s) Rating Wetland: �%�o`G�C� �liation: ��'-S Date of site visit: �o'�iJ���
Dl��'T SLT?�II�I.��' OF 12�1'TII�1G
C'ategorgr b�see� o� &`�TNC'TIONS pro�zded b,y wetland
I II III I�T
I
Score for Water Quality Functions
Category I= Score>70
Category II= Score 51-69 Score for Hydr•ologic Punctions
Category = Score 30-SO Score for Habitat Functions
Cate�or TV — Score < 30 T�B'AL score for �hnctious 2( ,I
C'ategoa-y b�sec� on SPEC�L C�ARAC'�'�l�S'TICS of v6�etland
I II Does uot Apply '�
« »
F�al Catego�y (�hoose t�e highest categon from above) �
Check the appropriate type and class of wetland being rated. I
;ia �R�i.:. '�s�. ,� ..�IIt�="�A�.� �
, t
Estuarine De ressional� Y
Natural Heritage Wetland Riverine
Bo Lake-frin e
Mature Forest Slo e
Old Growth Forest Flats
Coastal La oon Freshwater Tidal
Interdunal �
None of the above
R'etland Ratir_g Form—w�estem��'ashington 1 Angust 2004
Does tlie wetland beiug rated meet any of t�e criteria below?
If you answer YES to any of the questions below you will need to protect the wetland
accordin� to the reQulations regardin� the special characterstics four:d in the «��etland.
- � � Check Lisf for �'V'etlancis TLat Need Special Protechan,`aud' � =.�'ES �` 1V0 ;
�� That Are not Included in the Ratin� ' =.;'�
SP1. c�as tlte �1�etland becr� do�a�n�e�;ted as a izabitat jor•af����Fec�c:rai?i'listeu'
Threatened or Endangered plant or animal species (T,�E species)?
' For the purposes of this rating system, "documented" means the wetland is on the
a propriate state or federal database.
SP2. Has the ivetland been documented as habitat for any State listed Threatened or
Endangered plant or animal species?
For the puiposes of tliis rating system, "docurnented" means the ��etland is on the
appropriate state database.
SP3. Does the welland co�itain individuals of Priority-species lisled by the WDFW
�for the state?
SP4. Does the rvetland hm�e a local significance in addition to its functions? For �
example, the wetland has been identified in the Shoreline Master Program,
� the Critical Areas Ordinance, or in a local management plan as having
specia] significance.
To com��lete tl�e nextpal�t ot�the clata sheet ��ozt �vil1 fzeed to determine tlze
Hvdroaeomorphic Class of the tivetland beirza rated.
The l�ydrogeomorphic classification groups wetlands into those that funciion in similar ways. This
simplifies the questions needed to answer how well the wetland functions. The Hydrogeomorphic
Class of a wetland can be determined using the key below. See p. 24 for more detailed instructions
on classifying wetlands.
Wetlaud Ratin�Form— westem�6'aslungton 2 August Z004
_ . �
��
Classification of Vegetated Wetlands for Western V4'ashington
Wetland 1'ame: �.Q/i�t.�l/VI.IY�— Date: I�-l! 1��
I. Are the water levels in the wetland usually�controlled by tides (i.e. except during floods)`'
NO— go to 2 YES—the wetland class is Tidal Fringe
If yes, is the salinity of the water during periods ual low flow below 0.5 ppt(parts per
thousand)? YES—Freshwater Tidal Fringe NO Saltw�ater Tidal Fringe(Estuarine}
If your�vetland can be classrfied as a Freshwater Tidal Fringe use the forms jor Riverine
wetlands. If it is Salfi1°atef�Tidal Fringe it is rated as an Estunrine wetland. VJetlands that
were called estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fringe. in the Hydrogeomorphic Classification. Estuarine ��etlands were
categorized separately in the earlier editions, and this separation is being kept in this
revision. To maintain consistency between editions, the term"Estuarine" wetland is kept.
Please note, however,that the characteristics that define Category I and II estuarine
wetlands have changed(see p. ). ,
2. Is he t ography within the wetland flat and precipitation is only source (>90°%) of water to it. �
O go to 3 YF,S—The wetland class is Flats
If your vvetland can Ue classified as a "Flats"wetland, use the form for Depressional
wetlands.
3. Does the wetland meet both of the following criteria?
, _The vegetated part of the wetland is on the shores of a body of open water(without any
vegetation on the surface) where at least 20 acres (8 ha) are permanently inundated
(ponded or flooded);
� '�� At least 30% of the open water area is deeper than 6.6 ft(2 m)?
N —go to 4 YES—The wetland class is Lake-fringe (Lacustrine Fi•inge)
4. Does the v�etland meet all of the following criteria?
�/The wetland is on a slope (slope can be very gradua�,
��he water flows through the wetland in one direction (unidirectional) and usually
�� omes fi�om seeps. It may flo��v subsurface, as sheetflow, or in a swale without distinct
anl:s.
�
The water leaves the wetland without being impoundcd.
NOTE: Surface �vater does not pond in these type of titi�etlands excepr occasionally in
ve�%small and shallow depressions or behind hun:mocks/depressions are usually
<3ft di �and less than 1 foot deep).
NO - go to 5 Y'ES� The vvetland class is S1ope
, 5. Is the wetland in a ley, or stream channel, where it gets inundated by overbank flooding from
that stream or river? The flooding should occur at least once every t�vo years, on the average, to
answer "yes." The wetland can contain depressions that are ftlled with water when the river is
not floocting.
� NO - go to 6 YES—The wetland class is Riverine
I
3
VVetland Rating Form–western Washington 3 August 2004
6. Is the wetland in a topographic depression in w�hich water ponds, or is saturated to the surface, at
some tiine of the year. This means that any oi�tlet, if present, is higher than the interior of the
�vetland.
NO— go to 7 YES —The wetland class is Depressional
7. Is the wetland located in a very flat area��ith no obvious depression and no siream or river
running through it and provi�ing water. The wetland seems to be maintau�ed by high
groundwater in the area. The ��vetland may be ditched,but has no obvious natural outlet.
NO—go to 8 YES—The v��etland class is Depi•essional
S. Your wetland seeins to be diff`icult to classify. For example,seeps at the base of a slope may
grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of
flooding along its sides. Sometiines we find characteristics of several different hydrogeomorphic
classes withui one wetland boundary. Use the following tabie to identify the appropriate class to
use for the rating system if you have several HGM classes present within your wetland. NOTE:
Use this table only if the class that is recommended in the second column represents 10% or more
of the total area of the wetland being rated. If the area of the second class is less than 10% classify
the wetland using die first class.
`^�ITLI'I;I.�F�.��s'�r�y1��Zufs`� '��G� x��/�� �'3`�`�tQ�ti � - � � tr.?�'��rr,.r�, [).x„ e�.�. fi q� r^ �_.. .� .-;y.,.
+�,' .�H ��D,`.!"�.i... .�'cL,'a'.� ,^...f`,i`lF�..�� .�,.s�u`� :SA�„,�..a'�.�. �' ��3q��"'.�
Slope +Riverine Riverine
Slope +Depressional Depressional
Slope +Lake-fruige Lake-fringe
Depressional+Riverine along stream within boundary Depressional
Depressional +Lake-fringe Depressional
Salt Water Tidal Fringe and any other class of freshwater Treat as ESTUARINE under
wetland wetlands with special
characteristics
If you are unable still to determine which of the above criteria apply to your wetland; or you have
more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for
the rating. -
Wetland Rating Form—westem Washington 4 August 2004
� � � `` �IQ�� �4'Vetl:tnds .. �. . �� __, �._. . �_ � . � ._ �_ .n - , - - — PoFnrs �1
- _ . ;� � ::
� � �
� ;: t i� i: „ � �'-s. ' . ` a, _} :� �
� �� `�VATER QliALITY FUNCTiO�S�- �Indicatnr��thaf�vetlan�l�functions�to
improcc��ater qualitti _
: ,
S S 1. Does tt�c �.�etland ha��e the potential to improve water quaiity�? (see p. 64) _
S S 1.1 Characteristics of average slope of wetIand: �
Slope isl% or less (a 1%slope has a 1 foot vertical drop in ele�ation for every
100 ft horizontal distance) ....... .............................. points �3
. Siope is 1%- 2% points –
Slope is 2% - 5% points= I
Slope is greater than 5% points=0 � ,
S S 1.2 The soi12 inches below the surface is clay, organic, or smells anoxic
(hydrogen sulfide or rotten eggs).
YES =3 oints NO =0 poinis �
S S 1.3 Characteristics of the vegetation in the wetland that trap sediments and
pollutants:
Choose the points appropriate for the description that best fits the vegetation in
the u�etland. Dense vegetation means you have trouble seeing the soil surface.
Dense, ungrazed, herbaceous vegetation>90% of the wetland area points= 6 '
Dense, ungrazed, herbaceous vegetation> 1/2 of area points=3
Dense,woody,vegetation> '/z of area points=2
Dense, ungrazed;herbaceous vegetation> 1/4 of area points= 1 �,,
Does not meet any of the criteria above for vegetation points=0 ��
S Total for S 1 Add the points in the boxes above
S S 2. Does the wetland have the opportunity to improve water quality? (see p. 67)
Answer YES if you kno�v or believe there are pollutants in groundwatec or surface
vvater coming into the wetland that would otherwise reduce water quality in
streams, lakes or groundwater downgradient from the wetland?1Vote which of the
following conditions provide the sources ofpollutants.
— Grazing in the wetland or within 150ft
— Untreated stormwater discharges to wetland
�Tilled fields, logging, or orchards within 1 SO feet of wetland
Residential, urban areas, or golf courses are within 150 ft upslope of
wetland multiplier
— - �
YE multiplier is 2 NO multiplier is 1
S OTAL-VVater Quality Functions Multiply the score from S 1 by S2
Add score to table on . 1
Comments
Wetland Rating Form—western Washington 11 August 2004
i
i
�
� Sloge �'Vetlands < a s ; P,oinfs '
d k :d F . 3 y .' i . ��„ �. Y� ,�.� �s �.
�za' ,i� ..,..,�i.:i. .,. ,',�� . <-�. � _. ..�. s . ..:` �...���`" .,.;.. s,.:,t-j..-�.c ...:;. ,r ._. .-1:.� ��;s4^�MiR i j"'§,'i E,. �3.�&�-�'�'�..-F':�1'�,s�;«��:.�
, _ ` �IIYDROL�GIC FL'T�TCTIO�'S 2- lndicatc�rs that u-etland fitnctions to reduce'
..: - : , _ ; . . _
` fl�odin� an� stream erosion . - ' : `': '; `
S 3. Docs the ��etland ha�e the potential to rcduce flooding and stream erosion? `; t � ��
(see . 68)
S S 3.1 Characteristics of vegetation that reduce the velocity of surface flows during
storms. Choose the points appropriate for the description that best fit
conditions in the wetland.
Dense,uncut, rigid vegetation covers >90%of the area of the wetland.
(stems of plants should be ihick enough (usually> li 8in},or dense enough,to
remain erect during surface flows) points= 6
Dense,uncut, rigid vegetation> 1/2 area of wetland points= 3
Dense,uncut, rigid vegetation> 1/4 area points�
More than 1/4 of area is grazed, mowed,tilled or vegetation is �
not rigid oints=0
S S 3.� Characteristics of slope wetland that holds back small amounts of flood
flows:
The slope wetland has small surface depressions that can retain water o � at
least 10% of its area. YES points�2
NO points=0 �
S Add the points in the boxes above
S S 4. Does the wetland have tLe opporhinity to reduce flooding and erosion?
(see p. 70)
Is the wetland in a landscape position where the reduction in water velocity it
I provid s helps protect downstream property and aquatic resources from flooding
or ex essive and/or erosive flows? Note which of the following conditions apply.
— Wetland has surface runoffthat drains to a river or stream that has flooding
problems
— Other multiplier
(Answer NO if the major source of water is controlled by a reservoir(e.g. wetland is ,r, j
a e hat is on the downstream side of a dam) —��—
S multi lier is 2 NO multiplier is 1
S TOTAL -Hydrologic FuncNons Multiply the score from S 3 by S 4
Add score to table on p. 1
Comments
Wetland Rating Form—westem Washington 12 August 2004
L j34.�3� tteshans a ��l lO'.`*ef�aritl,� o �ii �V1.��4f�{Y7��J � :�R r K�" � � R''� �'E-}l i� ����1J�,� ��.::�
4 P.�'y .� ,� _,�
. S..:h_ __� .F.l�.�G.. ._ -. �-E.�.._ .:F` . __ c:2s.....�VPIt'J,� d���.�'d .v�-1c�..�3,�� _
HABTTAT FLm�CTIONS -Indicatc�rs that weaan�i functions to�ravide iinportant habxtat � I
�
— �i
H 1.Does the wetland have the potential to provide habitat for many species?
H 1.1 Vegetation structure (see p. 72)
Check the hpes of vegetation classes present (as defzned by Cowardin) if the class
covers m�re than 10% of the area of 1he wetland or '/, acre..
�Aquatic bed
�Emergent plants
Scrub/shrub (areas where shrubs have >30% cover)
' Forested(areas where trees have>30% c�ver)
Forested areas have 3 out of 5 strata(canopy, sub-canopy, shrubs,herbaceous,
moss/ground-cover)
Add the number of vegetation types that qual�. If you have:
4 types ar more points=4
3 types points–
2 types points� �
1 type points= 0
H 1_2. Hvdroperiods (see p. 73)
Check the types of water regimes (hydroperiods)present wilhin the wetland. The I
water regime has to cover more rhan 10%of the�vetland or '/4 acre to count. (see t�xt ��
for descriptions of hydroperiods) II
�Permanently flooded or inundated 4 or more types present points� I
�Seasonally floode.d or inundated 3 types present points=2 �I
�Occasionally flooded or inundated 2 types present point= 1 I
Saturated only I
��Permanently flowing stream or river in, or adjacent to,the��etland �i
Seasonally flowing stream in, or adjacent tq the wetland � �i
Lake fringe wetland =2 points j
Freshwater tidal wetland=2 points '�
H 1.3. Richness of Plant Species(see p. 75)
Count t.he number of plant species in the wetland that cover at least 10 ftZ. (different I
patches of the same species can be combined to meet the size ihreshold) ��,
You do not have to name the species.
Do not include Eurasian 1llilfoil, reed canarygrass,purple loosestrrfe, Canadian
Thistle
If you counted: > 19 species points–
List species below if you want to: 5 - i 9 species points�
<5 species points=0
�
� ''
Wetiand Rating Form—westem Washington 13 August 2004 I�I
H 1.4. Interspersion of habitats (see p. 76) �
Decide from the diagrams below whether interspersion between types of vegetation
(described in H 1.1), or vegetation types and unvegetated areas (can include open
water or mudflats)is high,medium, lo�v, or none.
_ . _ r
:�
None= 0 points Low= l point Moderate=2 points
__ .��-��,, � -
� -��.
� _ ���, � :«�
�� ;� � i �'..�..
,� =
�� [riparian braided channels]
High = 3 points �
NOTE: If you have four or more vegetation types or three vegetation types
and o en water the rating is always "high".
H 1.5. Special Habitat Features: (see p. 77)
Check the habitat features that are present in the wetland. The number of checks is
the number of points you put into the next column.
Large, downed,woody dehris within the wetland(>4in. diameter and 6 ft Iong).
Standing snags(diameter at the bottom> 4 inches)in the wetland
Undercut banks are present for at least 6.6 ft(2m) and/or overhanging vegetation
extends at least 3.3 ft{lm) over a stream for at least 33 ft(lOm)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (>30degree slopej OR signs of recent beaver activity are present
At least 1/a acre of thin-stemmed persistent vegetation or woody branches are present
in areas that are permanently or seasonally inundated(structures for egg-laying by
amphibiarzr)
Invasive plants cover less than 25% of the wetland area in each stratum of plants �
H 1. TOTAL Score- potential for providing habitat
Add the scores in the column above
Comments .
��Jetland Rating Form—westem R'aslvngton 14 August 2004
H 2. Does the wetland ha��e tl�e opportunity to provide habitat for many species? � . ,-:
H 2.1 Buffers (see p. 80)
Choose the description that best repr�esents condition of bisffer of wetland. The highest
scoring criterion that applies to the wetland is to be used in the rating. See text for
de�rzition of"undisturbed. "
— 100 m(330ft) of relatively undisturbed vegetated areas, rocky areas, or open water
>95% of circumference. No developed areas within undisturbed part of buffer.
I
(relatively undisturbed also means no-grazing) Points =5
� — 100 m(330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 50% circumference. Points =4
— 50 m(170ft) of relatively undisturbed vegetated areas, rocky areas,or open water
>95% circumference. Points=4
— 100 m (330ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 25% circumference, . Points =3
— 50 m(170ft) of relatively undisturbed vegetated areas, rocky areas,or open water
for>50% circumference. Points=3
' If buffer does not mcet anv of the criteria above
— No paved areas (except paved trails} or buildings within 25 m(80ft) of wetland>
95°% circumference. Light to moderate grazing, or lawns are OK. Points =2
— No paved areas or buildings within SOm of«�etland for>50% circumference.
Light to moderate grazing, or lawns are OK. Points = 2
— Hea�y grazing in buffer. Points= 1 '
— Vegetated buffers are <2m wide (6.6ft) for more than 95% of the circumference �
, (e.g. tilled fields, par•ing, basalt bedrock extend to edge of wetland Points=0. O I,
— Buffer does not meet any of the criteria above. Points = 1
� H 2.2 Corridors and Connections (see p. 81)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor (either riparian or upland)that is ai least 150 $wide,has at least 30% cover
of shrubs, forest or native undisturbed prairie,that connects to estuaries, other
wetlands or undisturbed uplands that are at least 250 acres in size? (dams in riparian
corridors, heavily used gravel roads,paved roads, are corrsidered breaks in the
corridor). ,
YES=4 points (go to H2.3) 1�T0= go to H 2.2.2
H 22.2 Is the wetland part of a relatively undisturbed and �broken vegetated '
corridor(either riparian or upland)that is at least SOft wide,has at least 30%cover of I
shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands I
that are at least 25 acres in size? OR a Lake-fringe wetland, if it does not have an
undisturbed corridor as in the question above?
YES=2 points (go to H2.3) NO=H 2.2.3
H 2.2.3 Is the wetland:
��ithin 5 mi (8km) of a brackish or salt water estuary OR i
within 3 mi of a large field or pasture (>40 acres) OR �
within 1 mi of a lake greater than 20 acres?
YES = 1 point NO =0 oints
�Vetland Rating�orm-ti�este�rn�1�ashington 15 Aueust?004
H 2.3 I`Tear or adjacent to other prioritv habitats listed bv VJDFW (see p. 82)
VVhich of the following priority habitazs are within 330ft (100m)of the wetland?
(see text for a more detailed description of these priority habitats)
Riparian: The area adjacent to aquatic systems with flowing���ater that contains
elements of both aquatic and terrestrial ecosystems which mutually influence each other.
Aspen Stands: Pure or mixed stands of aspen greater than 0.8 ha(2 acres).
Cliffs: Crreater than 7.6 m (25 ft)high and occurring below 5000 ft.
Old-growth forests: (Old-growth west of Cascade crest) Stands of at least 2 tree
species, forming a multi-layered canopy with occasional small openings; with at
least 20 trees,�ha (8 treeslacre)> 81 cm(32 in) dbh or>200 years of age.
Mature forests: Stanas w�ith average diameters exceeding 53 cm(21 in) dbh; crown
cover may be Iess that 100%;crown cover may be less that 100%; decay,
decadence,numbers of snags, and quantity of large downed material is generally
less than that found in old-growth; 80 - 200 years old west of the Cascade crest.
Prairies: Relatively undisturbed areas (as indicated by dominance of native plants)
where grasses and/or forbs form the natural climax plant couununity.
Talus: Homogenous areas of rock rubble ranging in average size 0.15 - 2.0 m(0.5 -
; 6.5 ft}, composed of basalt,andesite, andJor sedimentary rock, including riprap
j slides and mine tailings. May be associated with cliffs.
Caves: A naturally occurring cavity,recess,void, or system of interconnected
passages
Oregon white Oak: �'Voodlands Stands of pure oak or oak/conifer associations
where canopy coverage of the oak component of the stand is 25%.
� Urban Natural Open Space: A priority species resides within or is adjacent to the
open space and uses it for breeding and/or regular feeding; and,�or the open space
functions as a corridor connecting other priority habitats, especially those that
would otherwise be isolated;and/or the open space is an isolated remnant of natural
habitat larger than 4 ha(i0 acres)and is surrounded by urban development.
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal wetlands, usually
� semi-enclosed by land but with open,partly obstructed or sporadic access to the
� open ocean,and in which oceaii water is at least occasionally diluted by freshwater
runoff from the land. The salinity may be periodically increased above that of the
open ocean by evaporation.Along some low-energy coastlines there is appreciable
dilution of sea water. Estuarine habitat extends upstream and landward to where
ocean-derived salts measure less than O.Sppt. during the period of average annual
low�flow. Includes both estuaries and lagoons.
Marine/Estuarine Shorelines: Shorelines include the intertidal and subtidal zones
of beaches, and may also include the backshore and adjacent components of the
terrestrial landscape (e.g., cliffs, snags,mature trees,dunes,meadows)that are
unportant to shoreline associated fish and wildlife and that contribute to shoreline
function(e.g., sand/rock/log recruihnent,nutrient contribution, erosion control).
If wetland has 3 or more priority habitats =4 points �
If wetland has 2 priority habitats=3 points
If wetland has 1 priority habitat= 1 point No habitats=0 points
R�etland Rating Form—westem Washington 16 August 2004
, 1
i
H 2.4 V��etland Landscape (choose the one description of the landscape around the
wetland that best fits) (see p. 84)
There are at least 3 other wetlands within 1/z mile,and the connections between them
are relatively undisturbed (light g'azing between wetlands OK, as is lake shore with
some boating, but connections should I�TOT be bisected by paved roads, fill, fields,
or o#her development. points=5
The wetland is Lake-fringe on a lake with little disturbance and there are 3 other lake-
fringe wetlands within 1/z mile points=5
There are at least 3 other wetlands within '/z mile, BCTT the connections betu�een them
are disturbed points=3
The wetland is Lake-fringe on a lake w�ith disturbance and there are 3 other lake-
fringe wetland within'/z mile points=3
There is at least 1 wetland within %2 mile. points=2
There are no wetlands within %2 mile. points=0 �
H 2. TOTAL Score - opportunity for providing habitat �
Add the scores in the column above
Total Score for Habitat Functions —add the points for H 1,H 2 and record the result on
p. 1
Wetland Rating Form—westem VVashington 17 August 2004
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if the wetland»ieets the att�•ibutes described belox� and circle the
appropriate answers and Category.
V4'ekland Type :: ; , ; �< ' ;.� Careb°r��
f C1tc�ck,off ariy�ci-iter�ic� t1�t a,�plti to the Z��etlar2rl.�C,ircle the apprbpriute C`fttegvrtT�
�i°hc�i tl�e�cin ra ��iate criteria a►-e iltef. � � � � � �� _ � � �
SC 1.0 Estuarine �etlands (see p. 86) _ -
Does the v��etland meet the following criteria for Estuarine wetlands? � r
— The dominant water regime is tidal,
— Vegetated, and � ` -
— VVith a salinity�greater than 0.5 ppt. -
YES = Go to SC 1.1 NO �
— (
SC 1.1 Is the wetland within a National Wildlife Refuge,I�Tational Park,
National Estuary Reserve,Natural Area Preserve, State Park or Educational, Cat. I
Environmental, or Scientific Reserve designated under WAC 332-30-151?
YES = Category I NO go to SC 1.2
SC 1.2 Is the wetland at least 1 acre in size and meets at least two of the
following three conditions? YES =Categor}�I NO = Category II Cat. I
—The wetland is relatively undisturbed(has no diking, ditching,filling, Cat.II
cultivation, grazing, and has less than 10% cover of non-native plant
species. If the non-native Spartina spp. are the only species that cover
more than 10% of the «�etland, #hen the wetland should be given a dual Duai
rating (I/Il). The area of Spartina would be rated a Category II while the rating
relativel}'undisturbed upper marsh with native species would be a �
Category I. Do not, however, exclude the area of Spartina in
determining the size threshold of 1 acre.
—At least'/4 of the landward edge of the wetland has a 100 ft buffer of
shrub, forest, or un-grazed or un-mowed grassland.
—The wetland has at least 2 of the following features: tidal channels,
depressious with open water, or contiguous freshwater vvetlands.
,,_ , .:
.. .:. , , _ _�.:.. . .• ,�¢-�a...m.3;,:� .'t.`;��: ...4...,�:+...< .... :'^x...g..��,.4.�_;:,��aF.�j"�i3.'s. .�.:3�"u. '..-"i� ?!.-: .>�.�:k'��;�w .�}5:�:. .:,'��a
Wetland Rating Form—westem Washington 18 August 2004
i
! '
APPENDIX G
Engineering Calculations
n -
Project `.��7i�� �I���2 Project No. ��j �CJ�•[(i � Page o!_ _
Subject ��-i.7� ��%'�v Phone ❑ Calculations =1'=
❑ Fax _ _
Vith/To Fax#
❑ Memorandum
Address #Faxed Pages Q �
❑ Meeting Minutes �
Date �� �:J/ �h� By L�/ t �' ❑Telephone Memo
Civil Engineers
Structura!Engineers
�Cl�i f'�1�v i �GuD �1zi tif.c_-7
Landscape Architects
�1�u L� �E l-)fZr ��:%��1�..1C� t�i�tit�tZ.�►�`j
c�El.�l✓1.1.�1v� �N{�j 1-1�JUIl�.LZ � �,,,�r �—n)V,��•-��n Community Pfanners
� CK �`1
f� '�l E �i i� i I 'vJ�;�� Nc�i 4ti'l l4 k�
� Land Surveyors
`�� Te� ��I��E A '1� ��;�i����C� G R F�c�
�'4 ��� �J��,; � , ��=� ('ft�C �1���'�I1�� Nei hbo�s
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�� �'l.�;ti1; [�-£�fL �4L,c��.J���A�S:
C�� = �:95 c�-s
❑TACOMA
:. ._. ,� = I•� 7' �10/ Q.C>C:��� = � T���f Z 2215 N. 30th St.
;.._._,.;._._.. _ ;__. . 1 Suite 300
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I � � �� 98403-3305
-- �--_..-- -------__,_;.. _;
Tacoma WA
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�Qc '�1� �t �E i 11�1�1 D��`�H
; ` ` i ' ' ��p`r►f� �� `��Yu6J�11 ,j�C9Q�A�� 253.383.2572 FAX
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2>'�,��Q � �� SEATTLE
— + ' 1200 6th Avenue
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:----'� �_ -_----:. ---i- -,---_ : Suite 1620
� Seattle,WA
i __..�----- _ ` _ �-i - i j—. _ !' __, _-�--. 98101-3123
_ _- -... 206.267.2425
If this does not meet with your understanding,please contact us in writing within seven days.THANK YOU. 206.267.2429 FAX
il
�
APPENDIX H
�
FEMA Flood Insurance Map
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� � I was extractea using F-MIT On-�me. This map dces not re�ect changes
ZONE AE � I or amenclments which may haee been made subsequent to the date on the
�� title block For;he latest prod�ct Inlormation about National Flood insurance
.�� I Program Tcod maps check the FEMA FIooC Map Store at•++v✓w msc.fema.go��
EXHIBIT 1
Inspection Logs
Inspection Logs
On the following pages are sample inspection logs. These are only samples. Your
inspection logs can be of your own design
There must be an ins ection lo for each BMP. The log must indicate:
P 9
a. The date of the inspection.
b. Noted conditions.
c. If any discrepancies are noted indicate:
1) Who is supposed to make the correction?
2 The date b which the corrections will be com leted.
) Y P
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
To be completed at least once every 7 calendar days and within 24 hours of the end of a
storm event greater than 0.5 inch.
Inspector: Date:
Inspector's Qualifications:
Days since last rainfall: Amount of last rainfall: inches
Soil Stabilization Measures
Date of Last Stabilized
Location on site Disturbance (Yes/No) Stabilized With Condition
Stabilization required:
To be performed by: On or before:
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Perimeter Structural Controls
Silt Fence
Has Silt Is Fence Is There Evidence of
� Reached 1/3
Date Location of Fence P�OPerly Washout or
Hei ht? Secured? Overtopping?
I
I
Maintenance required for silt fence and straw bales:
� �
To be performed by: On or before:
i
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Inlet Protection
Date Depth of Sediment Condition of Fabric
Maintenance required for inlet protection;
To be performed by: On or before:
�
I
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Stabilized Construction Entrance
Does much Is the gravel Does all traffic Is the culvert
sediment get clean or is it use the beneath the
Date stabilized
tracked on to filled with entrance
road? sediment? entrance to leave Working?
the site?
Maintenance required for stabilized construction entrance:
I
To be performed by: On or before:
i
Cedar River Corporate Park
Stormwater Pollution Prevention Plan
Inspection and Maintenance Report Form
Check Dams
Evidence of
Sediment Higher Erosion or Significant Is There
Date than �/z Sump Submergence Erosion Between Evidence of
Depth? Around the Edges Dams? Washout?
of the Dam? '
Maintenance required for check dams:
To be performed by: On or before:
-
Cedar River Corporate Park I'
Stormwater Pollution Prevention Plan
I� Inspection and Maintenance Report Form '
�
Changes required to the pollution prevention plan:
Reasons for changes:
I certify under penalty of law that this document and all attachments were prepared '
under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gathered and evaluated the information submitted. Based ,
on my inquiry of the person or persons who manage the system, or those persons �
directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there
are signification penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Signature: Date: ,
�
, 9.O BOND QUANTITIES� FACILITY SUMMARY� AND DECLARATION OF
COVENANT
See the enclosed following pages.
9.A Bond Quantity
9.B.1 Facility Summary Sheet
9.6.2 Technical Information Report (TIR) Worksheets
,
�
23 �� � �
Site Im rovement Bor,u �uantit Worksheet I
p Y
�� King County
Department of Development 8� Environmental Services
900 Oakesdale Avenue Southwest
Renton,Washington 98055-1219 For alternate formats, call 206-296-6600.
206-296-6600 TTY 206-296-7217
Pro)e�t►vame: Cedar River Corporate Park �ate: 10-May-07
�ocation: _ 29231 132nd AVE SE Auburn, WA. Project No.: 206200.1
Activity No.:
Note: All prices include labor, equiprTient, materials, overhead and
Clearing greater than or equal to 5,000 board feet of timber? profit. Prices are from RS Means data adjustetl for the Seattle area
or from local sources if not included in the RS Means database.
yes X no
If yes,
Forest Practice Permit Number:
(RCW 76.09)
Page 1 of 9
Unit prices updated OZ/12/02
Version: 04/22/02
206200-bondquantity xls Check out the DDES Web site at www.metrokc.qov/ddes Report Date: 5/10/2007
Site improvement Bond Quantity Worksheet
' _ Unit #of
- Ref�rence# Price Unit Quantity Applications Cost
ERU�IUN/SEDIMENT Cf3NTROl.. Number
Back(ill & compaction-embankmenl ESC-1 $ 5 62 CY 1000 1 5620
Check dams, 4" minus rock ESC-2 SWDM 5.4.6.3 $ 67.51 Each 21 1 1418
Crushed surfacing 1 1/4"minus ESC-3 WSDOT 9-03.9(3) $ 85.45 CY
Ditching ESC-4 $ 8.08 CY 1170 1 9454
Excavation-bulk ESC-5 $ 1.50 CY 13305 1 19958
Fence, silt ESC-6 SWDM 5.4.3.1 $ 1.38 LF 4400 1 6072
Fence,Temporary(NGPE) ESC-7 $ 1.38 LF 580 1 800
H droseeding ESC-8 SWDM 5.4.2.4 $ 0.59 SY 8000 1 4720
Jute Mesh ESC-9 SWDM 5.4.2.2 $ 1.45 SY
Mulch, by hand, straw, 3"deep ESC-10 SWDM 5.4.2.1 $ 2.01 SY
Mulch, b machine, straw, 2"dee ESC-11 SWDM 5.4.2.1 $ 0.53 SY 3500 1 1855
Piping,tempora , CPP, 6" ESC-12 $ 10.70 LF
Piping,temporary, CPP, 8" ESC-13 $ 16.10 LF
Piping, tem ora , CPP, 12" ESC-14 $ 20.70 LF
Plastic covering,6mm thick, sandbagged ESC-15 SWDM 5.4.2.3 $ 2.30 SY
Rip Rap, machine placed; slopes ESC-16 WSDOT 9-13.1(2) $ 39.08 CY 5 24 4690
Rock Construction Entrance, 50'x15'x1' ESC-17 SWDM 5.4.4.1 $ 1,464.34 Each
Rock Construction Entrance, 100'x15'x1' ESC-18 SWDM 5.4.4.1 $ 2,928.68 Each 2 1 5857
Sediment pond riser assembly ESC-19 SWDM 5.4.5.2 $ 1,949.38 Each
Sediment trap, 5' high berm ESC-20 SWDM 5.4.5.1 $ 17.91 LF
Sed. trap,5'high, riprapped spillway berm section ESC-21 SWDM 5.4.5.1 $ 68.54 LF
Seeding, by hand ESC-22 SWDM 5.4.2.4 $ 0.51 SY
Sodding, 1"deep, level ground ESC-23 SWDM 5.4.2.5 $ 6.03 SY 1000 1 6030
Sodding, 1"deep, sloped ground ESC-24 SWDM 5.4.2.5 $ 7.45 SY
TESC Supervisor ESC-25 $ 74.75 HR 200 1 14950
Water truck, dust canlrol ESG26 SWDM 5 4 7 $ 97 75 HR 60 1 5865
WRITE-1N-1TEMS *'�'�* see a e 9
Each
ESC SUBTOTAL: $ 87,288 17
30% CONTINGENCY 8. MOBILIZATION: $ 26,186.45
ESC TOTAL: $ 113,474 62
COLUMN: A
Page 2 of 9
Unit prices updated ��"Z/02
Version ?/0�
206200-oonaquantiry.xls Check out the DDES Web sire ar www.metrokc.qov/ddes Report Date: 5/10/2007
Site Improvement Bor ' �uantity Worksheet ,
_ _ _ _ _ _____ _ _ _ _ _ ____ __
_ _ _ __ _ _ _ _ ___ _ _ __ _ _
__ _ _ _ _ _ _ _ __
_ __ _ ___ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ ___ _ _ _ _ _ _
__
r: ; ! i: EXisiing -Future Pubfic ' ,Private Qu�ntity Ct�mpleted
Rightccsf-Way Road improvements ImprovPrnents (Bond Reduction�`
: ' &praina e FaciGties ' Quaait
1J�d price Unit Quant Gnst C�uant Cnsf Qtfant Cost Complete Cost
G�IV�FtAL IT�MS ' ' , : No. : - _ - , , ; :
— _. _ __ __ _. _.
Backfill&Compaction-embankment GI-1 $ 5.62 CY 3000 16,860.00
Backfill&Compaction-trench GI-2 $ 8.53 CY
Clear/Remove Brush,by hand GI-3 $ 0.36 SY
Clearing/Grubbing/Tree Removal GI -4 $ 8,876.16 Acre 12.6 111,839.62
Excavation-bulk GI-5 $ 1.50 CY
Excavation-Trench GI -6 $ 4.06 CY
Fencing,cedar,6'high GI -7 $ 18.55 LF
Fencing,chain link,vinyl coated, 6'hig GI-8 $ 13.44 LF 800 10,752.00
Fencing,chain link,gate,vinyl coated, 2 GI-9 $ 1,271.81 Each 1 1,271.81
Fencing,split rail,3'high GI- 10 $ 12.12 LF
Fill 8 compact-common barrow GI- 11 $ 22.57 CY
Fill&compact-gravel base GI -1 $ 25.48 CY
Fill&compact-screened topsoil GI -1 $ 37.85 CY
Gabion, 12"deep,stone filled mesh GI -14 $ 54.31 SY
Gabion, 18"dee ,stone filled mesh GI-1 $ 74.85 SY
Gabion,36"deep,stone filled mesh GI-1 $ 132.48 SY
Grading,fine,by hand GI- 1 $ 2.02 SY
Grading,fine,with grader GI -1 $ 0.95 SY 51,304 48,738.80
Monuments,3'long GI-1 $ 135.13 Each
Sensitive Areas Sign GI-20 $ 2.88 Each
Sodding, 1"deep,sloped ground GI-21 $ 7.46 SY
Surveying,line&grade GI -2 $ 788.26 Day
Surveying,lot location/lines GI-2 $ 1,556.64 Acre 12.6 19,613.66
Traffic control crew(2 flaggers ) GI-24 $ 85.18 HR 40 3,407.20 200 17,036.00
Trail,4"chipped wood GI-2 $ 7.59 SY
Trail,4"crushed cinder GI-26 $ 8.33 SY
Trail,4"top course GI-2 $ 8.19 SY
Wall, retaining,concrete GI -2 $ 44.16 SF 12280 542,284.80
Wall,rockery GI-2 $ 9.49 SF 900 8,541.00
Paye 3 0(9 SUBTOTAL J,YO7.LO 77G,937 69
Unit prices updated 02/12/02
'KCC 27A authorizes only one bond reduction Vefslofl: 4/22/02
206200-bondquantity.xls Check out the DDES Web site at www.metrokc.qov/ddes Report Date: 5/10/2007
Site Improvement Bond Quantity Worksheet
Existing Future Punlic Private Bon�Reduction'
Right-of-way RQad lmprovements tmprovements
8�'Drainage Facilities ' Quattt.
Urnt Price Unit Quent. Cosf ' Gtuanf:_ _ Cust C�uant. c;ost : Complete Cost
_ _ _ _ _ _ _. _ _. _ _ _ ___ _ . _ . _ _ _ ___ _
R4AD 1Ntt'FtdV�M�NT ' ' Nv.
_ _ _
AC Grinding,4'wide machine< 1000s RI-1 $ 23.00 SY
AC Grinding,4'wide machine 1000-200 RI-2 $ 5.75 SY
AC Grinding,4'wide machine>2000s RI-3 $ 1.38 SY
AC Removal/DisposallRepair RI-4 $ 41.14 SY 10 411.40
Barricade,type I RI-5 $ 30.03 LF
Barricade,t pe III(Permanent) RI-6 $ 45.05 LF
Curb&Gutter,rolled RI-7 $ 13.27 LF
Curb&Gutter,vertical RI-8 $ 9.69 LF 80 775.20
Curb and Gutter,demolition and dispos RI-9 $ 13.58 LF
Curb,extruded asphalt RI-10 $ 2.44 LF
Curb,extruded concrete RI-11 $ 2.56 LF 5600 14,336.00 I'
Sawcut,asphalt,3"de th RI- 12 $ 1.85 LF
Sawcut,concrete, er 1"de th RI-13 $ 1.69 LF
Sealant,asphalt RI-14 $ 0.99 LF '
Shoulder,AC, (see AC road unit price RI-15 $ - SY
Shoulder,gravel,4"thick RI-16 $ 7.53 SY
Sidewalk,4"thick RI-17 $ 30.52 SY 373 11,383.96 4800 146,496.00
Sidewalk,4"thick,demolition and dispos RI-18 $ 27.73 SY
Sidewalk, 5"thick RI-19 $ 34.94 SY 9163 320,155.22
Sidewalk,5"thick,demolition and dispos RI-20 $ 34.65 SY
Sign,handicap RI-21 $ 85.28 Each 9 767.52
Striping,per stall RI-22 $ 5.82 Each 360 2,095.20
Striping,thermoplastic,(for crosswalk RI-23 $ 2.38 SF 1400 3,332.00 '
Striping,4"reflectorized line RI-24 $ 0.25 LF 10000 2,500.00 II
Page 4 of 9 SUBTOTAL 15,902.56 486,349.94
Unit prices updalec 2/02
"KCC 27 orizes onlv one bond reduction. Versio Z/02
206200-bondq�antiry xls Check out the DDES Web s►te at www.metrokc.gov/ddes Report Date �l1 U/�007
• Site Improvement Bor�.�uantity Worksheet •
,:
�xisting Future Public F�rivale' Bond Reduction`
'. ` ' Right-t�f-way, I�oad lmprovements krtiprcivernents ,
�IJraina efa�ilities ' C7uant.
U��t Prrce Ueiit C�uaijt, Cosf Quanf: Cost Qua�t: Gost Com_lete Cvst
f20AD SURFACING j4'�:Rfle�C=:�,b E�ase&f,5"fop eauCae�> For'93 K�RS#6,5"Ro�k=5`base& 1.5"tap course�
_ ........................ . ...
For KCRS'93,(additional 2.5"base)add RS-1 $ 3.60 SY
AC Overlay, 1.5"AC RS-2 $ 7.39 SY
AC Overlay,2"AC RS-3 $ 8J5 SY
AC Road,2",4"rock, First 2500 SY RS-4 $ 17.24 SY 2500 43,100.00
AC Road,2",4"rock,Qty. over 25005 RS-5 $ 13.36 SY 20792 277,781.12
AC Road,3",4"rock,First 2500 SY RS-6 $ 19.69 SY
AC Road,3",4"rock,Qty.over 2500 S RS-7 $ 15.81 SY
AC Road,5", First 2500 SY RS-8 $ 14.57 SY
AC Road,5",Qty. Over 2500 SY RS-9 $ 13.94 SY
AC Road,6", First 2500 SY RS-1 $ 16J6 SY
AC Road,6",Qty. Over 2500 SY RS-11 $ 16.12 SY
Asphalt Treated Base,4"thick RS-1" $ 9.21 SY
Gravel Road,4"rock, First 2500 SY RS-1. $ 11.41 SY 283 3,229.03
Gravel Road,4"rock,Qty. over 2500 S S-t $ 7.53 SY
PCC Road,5",no base,over 2500 SY RS-1 $ 21.51 SY
PCC Road, 6",no base,over 2500 SY RS-1 $ 21.87 SY
Thickened Edge RS-1 $ 6.89 LF
Page 5 of 9 SUBTOTAL 324,110.15
Unit prices updated 02/12l02
"KCC 27A authorizes only one bond reduction. Version: 4/22/02
206200-bondquantity.xls Check out the DDES Web site at www.metrokc._qov/ddes Report Date: 5/10l2007
— — �
Site Improvement Bond Quantity Worksheet
' . :; ' Existirig �uture PUbtic ' 'Private Sond Reduction`
; Right-of-way . Road Improvements Improvements
' &Drainage Facilities- f�uant,
Un�f Pr�ce Unit Quarrt. Cost Quant, �ost Quant. Cust Carnplete CosE
- — —
��
�3FtAI�Vl�G� �c�P:�ccrrugate�PiasfGc�,pe,tV')Z Of�qUfVqi8ilt)' �pr Cufveri pcices; Avc�ia�Ie of�'eoue�v�r�s asscimed;Rssume perforaied PVC is same price as solid pipe.
Access Road, R/D D- 1 $ 16.74 SY
Bollards-fixed D-2 $ 240.74 Each 6 1,444.44
Bollards-removable D-3 $ 452.34 Each
'(CBs include frame and lid)
CB Type I D-4 $ 1,257.64 Each 12 15,091.68
CB Type IL D-5 $ 1,433.59 Each 10 14,335.90
CB Type II,48"diameter D-6 $ 2,033.57 Each 10 20,335.70
for additional depth over 4' D-7 $ 436.52 FT 15 6,547.80
CB Type Il, 54"diameter D-8 $ 2,192.54 Each 3 6,577.62
for additional depth over 4' D-9 $ 486.53 FT �
CB Type II,60"diameter D-10 $ 2,351.52 Each �'i
for additional depth over 4' D- 11 $ 536.54 FT �
CB Type II,72"diameter D-12 $ 3,212.64 Each '
for additional depth over 4' D- 13 $ 692.21 FT
Through-curb Inlet Framework(Add) D- 14 $ 366.09 Each
Cleanout, PVC,4" D-15 $ 130.55 Each
Cleanout, PVC,6" D-16 $ 174.90 Each 84 14,691.60
Cleanout, PVC,8" D- 17 $ 224.19 Each
, Culvert, PVC,4" D- 18 $ 8.64 LF
Culvert, PVC,6" D- 19 $ 12.60 LF 1220 15,372.00
Culvert, PVC, 8" D-20 $ 13.33 LF
Culvert,PVC, 12" D-21 $ 21.77 LF
Culvert,CMP,8" D-22 $ 17.25 LF
Culvert,CMP, 12" D-23 $ 26.45 LF
Culvert,CMP, 15" D-24 $ 32.73 LF
Culvert,CMP, 18" D-25 $ 37.74 LF
Culvert,CMP,24" D-26 $ 53.33 LF
Culvert,CMP,30" D-27 $ 71.45 LF
Culvert,CMP,36" D-28 $ 112.11 LF
Culvert, CMP,48" D-29 $ 140.83 LF
Culvert,CMP,60" D-30 $ 235.45 LF
Culvert, CMP, 72" D-31 $ 302.58 LF
Page 6 of 9 SUBTOTAL 94,396 74
Unit prices updatec 12/02
'KCC 2; �orizes only one bond reduction. Versic '2/02
206200-....,�.,y�antiry.xls Check out the DDES Web�,.�a,www.metrokc.pov/ddes Report Date. �,��,2007
I
Site Improvement Bor ' �uantity Worksheet
Existing - Fu(ure PubGr. Pnvafe Bond Reduc,tion'
Right-of-w�y Raad Im{>rov�ments Improvernents
U�ZAINAGE CONTINUED &D�ai�age Facilities Quant
' �to. Unit Price Unit Quatrt. Cost Quat�t. Gost Quant. Gost Complete Cost .
Culvert, Concrete,8" D-32 $ 21.02 LF
Culvert,Concrete, 12" D-33 $ 30.05 LF
Culvert,Concrete, 15" D-34 $ 37.34 LF
Culvert,Concrete, 18" D-35 $ 44.51 LF
Culvert,Concrete,24" D-36 $ 61.07 LF
Culvert,Concrete,30" D-37 $ 104.18 LF
Culvert,Concrete,36" D-38 $ 137.63 LF
Culvert,Concrete,42" D-39 $ 158.42 LF
Culvert,Concrete,48" D-40 $ 175.94 LF I
Culvert,CPP,6" D-41 $ 10.70 LF
Culvert,CPP,8" D-42 $ 16.10 l.F �
Culvert,CPP, 12" D-43 $ 20.70 LF 1262 26123.4
Culvert,CPP,15" D-44 $ 23.00 LF
Culvert,CPP, 18" D-45 $ 27.60 LF 1 143 31546.8
Culvert,CPP,24" D-46 $ 36.80 LF 757 27857.6
Culvert,CPP,30" D-47 $ 48.30 LF 247 11930.1
Culvert,CPP,36" D-48 $ 55.20 LF
, Ditching D-49 $ 8.08 CY 150 1212
Flow Dispersal Trench (1,436 base+) D-50 $ 25.99 LF
French Drain (3'depth) D-51 $ 22.60 LF
Geotextile,laid in trench,polypropylen D-52 $ 2.40 SY
Infiltration pond testing D-53 $ 74.75 HR
Mid-tank Access Riser,48"dia, 6'dee D-54 $ 1,605.40 Each
Pond Overflow Spillway D-55 $ 14.01 SY
Restrictor/Oil Separator, 12" D-56 $ 1,045.19 Each
Restrictor/Oil Separator, 15" D-57 $ 1,095.56 Each
Restrictor/Oil Separator, 18" D-58 $ 1,146.16 Each 2 2292.32
Riprap,placed D-59 $ 39.08 CY 50 1954
Tank End Reducer(36"diameter) D-60 $ 1,000.50 Each
Trash Rack, 12" D-61 $ 211.97 Each
Trash Rack, 15" D-62 $ 237.27 Each
Trash Rack, 18" D-63 $ 268.89 Each 3 806.67
Trash Rack,21" D-64 $ 306.84 Each
I Page 7 of 9 SUBTOTAL 103722.89
Unit prices updated: 02/12/02
'KCC 27A authorizes only one bond reduction. Version� 4/22/02
206200-bondquantity.xls Check out the DDES Web site at www.metrokc.qov/ddes Report Date: 5/10/2007 I
�- -_ __ __ __ _ _ _ _ -- _____I
Site Improvement Bond Quantity Worksheet
�xisti�g �uture PubGc Private - Bond Reductinn* '
Right-of-way Road lmprav�ments tmprovements
: S�Drainage�acifities Quant
:: :` Unif Priee Unit Quant. Prl�e c3uant Cost Qu�nt. Cust ' Comphete ' G�st >.
__._ . __ __. _ __._ _ __
1 T''.S A4"1NCi
__ _ _.
No.
2"AC,2"top course rock&4"borrow PL- 1 $ 15.84 SY
2"AC, 1.5" top course&2.5"base cour PL-2 $ 17.24 SY
4"select borrow PL-3 $ 4.55 SY
1.5"top course rock&2.5"base cours PL-4 $ 11.41 SY
_..
(Such as detention/water quality vaults. No.
WI-1 Each �
WI-2 Each '
WI-3 Each
WI-4 Each
WI-5 FT
WI-6
WI-7 �
WI-8
WI-9
wi-�o
SUBTOTAL
SUBTOTAL(SUM ALL PAGES): 19,309.76 1,785,517.41
30%CONTINGENCY&MOBIIIZATION: 5,792.93 535,655.22
GRANDTOTAL: 25,102.69 2,321,172.63
COLUMN: B C D E
Page 8 of 9
Unit prices updatec i2/02
"KCC 27 orizes only one bond reduction. Verslo 2/02
206200-bondquantity.xls Checkout the DDES Web site atwww.metrokc.gov/ddes Report Date: 5/10/2007
Site Improvement Boi �u Quantity Worksheet
Original bond computations prepared by:
Name: Paul B. McCormick �ate: 10-May-07
PE Registration Number: 32191 Tel.#: (253)383-2422
Firm Name: AHBL, Inc. ,
Address: 2215 North 30th, Suite 300 Tacoma, WA 98403 Project No: 206200.1
ROAD IMPROVEMENTS&DRAINAGE FACILITIES FINANCIAL GUARANTEE REQUIREMENTS
PERFORMANC�BOND" PUBLIC ROAD&DRAINAGE ,
AMOUNT BOND*AMOUNT MAINTENANCE/DEFECT BOND" I
REQUIRED AT RECORDING OR I
Stabilization/Erosion Sediment Control (ESC) (A) $ 113,474.6 TEMPORARY OCCUPANCY"'
Existing Right-of-Way Improvements (B) $ -
� Future Public Road Improvements& Drainage Facilities (C) $ 25,102.7
Private Improvements (D) $ 2,321,172.6
Calculated Quantity Completed (E) $ -
Total Right-of Way and/or Site Restoration Bond'`/" (A+B) $ 113,474.6
(First$7,500 of bond'shall be cash.)
Performance Bond*Amount (A+B+C+D) = TOTAL (T) $ 2,459,749.9 T x 0.30 $ 737,925.0 OR
inimum on amount is
Reduced Performance Bond'Total"* (T-E) $ 2,459,749.9
Use larger o x o or -
(B+C)x
Maintenance/Defect Bond'Total 0.25= $ 6,275.7
NAME OF PERSON PREPARING BOND'REDUCTION: Daie:
`NOTE: The word"bond"as used in this document means any financial guarantee acceptable to King County.
"NOTE: KCC 27A authorizes right of way and site restoration bonds to be combined when both are required.
The restoration requirement shall include the total cost for all TESC as a minimum,not a maximum. In addition, corrective work, both on-and off-site needs to be included.
Quantities shall reflect worse case scenarios not just minimum requirements. For example, if a salmonid stream may be damaged,some estimated costs for restoration
needs to be reflected in this amount. The 30%contingency and mobilization costs are computed in this quantity.
***NOTE: Per KCC 27A,total bond amounts remaining after reduction shall not be less than 30%of the original amount(T)or as revised by major design changes.
SURETY BOND RIDER NOTE: It a bond rider is used,minimum additional pertormance bond shall be $ 2,346,275.3 (C+D)-E
REQUIRED BOND'AMOUNTS ARE SUBJECT TO REVIEW AND MODIFICATION BY DDES
, Page 9 of 9 Unit prices updated: 02/12/02
Check out the DDES Web site at www.metrokc._qov/ddes Version: 4/22/02
206200-bondquantity.xls Report Date: 5/10/2007
9.B.1 Facility Summary Sheet
�
i
I
I
i
25 QQ = O
KI�� CGliNTY, �v;aSHt�GT��, �LRFACE ��`ATER DESIGI� �f.a?�liAL '
STORl�1`'�'ATER FACILITY SUN11��1ARY SHEET DDES Permit
Number 1
(provide one Storm��-ater Facility Summary Sheet per 1'�'atu��al Dischar�e Locatior�l ,
Overvie�i�: '
Project Name
Date 1���s�,,7
Downstream Drainage Basins
I��lajor Basin Name � �r�r��
Immediate Basin Name
Flo«r Control: ��
Flo��� Control Facility I�ame;"'_�tumber ����D�f ��
Facilit_y
Location� d ��G
T
If none,
Flow control provided in regionaL'shared facilitv (give
location) l�)e�. �sf �i�rxi�/`-p�1r �i�c�l
No flo��� control required E�emption number
Ceneral Facility Information: I�
Type.%I�umber of detention facilities: T��pe."vumber of infiltration facilities: � �
�—ponds � ����G�.r�� L^��"���
vaults tanks
tanks trenche�
Control Structure Location
/Vl�r� f-l'�� �C�/`�Cr d g� ( � Sf d Gtt �ifJ
Type of Control Structure Number of Orifices.;'Restrictions
� �� ���� �� . ��� - ,r
Size of Orifice%Restriction: r� No. 1 _ ��� � /�D. � —���' �
No. 3 � f f�— /�C�, � � 5�8 '�
I�o. 4
Flo«r Control Performance Standard� l V� � �
�
2005 Surface Water Design Manual ]i]i0S
1
KI�IG COL:'_vT5', ��'ASH]�1GT0\, SURFACE ���ATER DECIGN ?v1ANUAL
Li�.e Storage Volume lj�`�� ��� C� Depth � Volume Factor of Safety
�umber of Acres Served �2. �� '
Number of Lots �(/��4
�—
Dam Safety Regulations(Washington State Department of Ecology)
Reservoir Volume above natural grade
Depth of Reservoir above natural grade
Facilit� Summary Sheet Sketch
.all detention, intiltration and «�ater quality facilities must include a detailed sketch.
�11"x 1�"' re.duced size plan sheetc may be use.dl
i;l/0� 200� Surface��l-ater Design Manual
2
ILI'vG COU�T��, ��-ASHII�GTOT�. �liRFACE �1`ATER DESIG� �9�tiL-AL
`�'ater Qualit�:
Type/1Vumber of water qualit}� facilitiesBNlPs: f �Q„V �GZrO��
2 biofiltration s«�ale sand filter (basic or largej �,
(regular� �e - or continuous inflow) sand filter, linear (basic or '
large) �
combined detention,'wetpond sand iilter vault (basic or I,i
large) �
I
(wetpond portion basic or largel sand bed depth (inches) ;
combined detention:'wetvault stormwater��-etland
filter strip storm filter �
I
flow dispersion «�etpond (basic or largel
�
farm management plan ���etvault �
landscape management plan Is facilit�- L.ined? �
oil.!water separator If so; what marker is used !
i
above
(baffle or coalescing plate j �
Liner? '
catch basin inserts:
l�-lanufacturer
pre-settling pond
pre-settling structure:
Manufacturer
high flow bypass structure (e.g., flow-splitter catch basin)
source controls
Design Information
VV ater Quality design flow � � � �'�S �L+,Q/y�������
�
��'ater Quality treated volume (sandfilter)
��%ater Quality storage volume (�� 9�372, �j ��
�Q��v �ar�e��
Facilitv Summarv Sheet Sketch
211p5 Surface Vvater Design A4anual 1'];0�
Z
RI�1G COLNTY, �I�A�HII�GTC�ti; SL�RFALE WATER DES]G?v '�1ANL AL
:�11 detention, infiltration and��-ater qualitti facilities must include a detailed sketch.
(11"�1%" reduced size plan sheets may be usedl
lil/OS 2005 Surface 1�'ater Design'vlanual
d
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CEDAR RIVER CORPORATE PARK DEVELOPED CONDITION EXHIBIT C-2
K1�G COU'�'TY, ���ASHINGT(�N, SURFACE VdATER DESIGN MANL'AL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 1 PROJECT OWNER AND Part 2 PROJECT LOCATION AND
PROJECT ENGINEER DESCRIPTION
Project Owner �I q2l��C�o�J : L�,C: Project Name `! ' _ � "'� �2� t'
Phone ( Z(�v� 2��'— C/!�C%C� DDES Permit#
Address /�L �c.Gh� � ��`�. �!���i Location Township 2��1`�
:�L ia 1 i L� , `l..V+1 . ��L�`i Ra n g e � [
Project Engineer CF'�Li�(Q� f . N�l� Section � �
Company A]��j� S+�e-{�ress �j�j�C��Z�i�
Phone =� ��— 2,'7Z ��CEi �
Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS
❑ Landuse Services ❑ DFW HPA ❑ Shoreline
Subdivison 1 Short Subd. i UPD f��anagement
❑ COE 404
� Bu din Services ❑ DOE Dam Safety � Structural
M;'F Commerica ! SFR � RockeryNaulti�Q
� Clearing and Grading FEMA Floodplain
❑ ESA Section 7
� Right-of-Way Use ❑ COE Wetlands
❑ Other ❑ Other
Part 5 PLAN AND REPORT INFORMATION
Technicai Information Report Site Improvement Plan (Engr. Plans)
�
Type of Drainage Review Full `1 Targeted / Type (circle one): Full � i Modified 1
(circle): Large Site mall Site
Date (inciude revision �� G(�� Date (include revision ��. ZZ� �D�C�
dates): dates):
Date of Final: �ZC,' z (J�•�.T� Date of Final: f} 2 zC�
Part 6 AOJUSTMENT APPROVALS
Type (circle onej: Standard / Complex � Preapplication 1 Experimental � Blanket
Description: (include conditions in TIR Section 2)
N��
Date of A roval:
2G05 Surface���ater Design Manual li�l;'OS
1
K1vG COL:��TY. ��'�SH1?�GTI�\�, SL�RFACE WATER DES1G'� I�1AVL �L
TECHNICAL INFORMATION REPORT (TIR} WORKSHEET �
Part 11 DRAINAGE DESIGN LIMITATIONS
REFERENCE LIMITATION / SITE CONSTRAIi�T I
❑ Core 2 — Offsite Analvsis
❑ Sensitive'Critical Areas
❑ SEPA ,
❑ Other ',
❑ ��
❑ Additional Sheets Attached
� Part 12 TIR SUMMARY SHEET provide one TIR Summarv Sheet er Threshold Dischar e Area)
Threshold Discharge Area:
(name or descri tion �'i
Core Requirements (all 8 apply) �
Dischar e at Natural Location Number of Natural Dischar e Locations:
Offsite Analysis Level: 1 r` 2 ! 3 dated:
Flow Control Level: 1 ! i 3 or Exemption Number
incl. facilit summa sheet Small Site BMPs
Conveyance System Spill containment located at:
Erosion and Sediment Control ESC Site Supervisor: �TU � �f�c=�i�[7�D
' Contact Phone:
After Hours Phone
Maintenance and Operation Responsibility: Private ! Pubiic
If Private. Maintenance Lo Re uired: Yes / No
Financial Guarantees and Provided: Yes / No
Liabilit
Water Quality Type: Ba / Sens. Lake / Enhanced Basicm r Bog
(include facility summary sheet) or Exemption No.
Landsca e Mana ement Plan: Yes / No
S ecial Re uirements as a licable
Area Specific Drainage Type: CDA/ SDO/ MDP / BP / LMP / Shared Fac. i None
Re uirements Name:
Floodplain/Floodway Delineation Type: Major / Minor / Exemption / None
100-year Base Flood Elevation (or range): ��o
Gatum: ���h1q
Flood Protection Facilities Describe: ���
Source Control Describe landuse: �/�
(comm./industrial landuse) Describe any structural controls:
200� Surface Water Design�lanual 1%1'OS
3
Ki�G CO�"�T1", WASHI�GTON, SLRFACE ��ATER DESIGN MANllaL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
�
Oil Control High-use Site: Yes i No �
Treatment BMP:
Maintenance Agreement: Yes ? Jo
with whom?
Other Draina e Structures
Describe:
�I Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS
MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS
DURING CONSTRUCTION AFTER CONSTRUCTION
Clearing Limits Stabilize Exposed Surfaces
Cover Measures Remove and Restore Temporary ESC Facilities
I� Perimeter Protectic„ lp Clean and Remove All Silt and Debris Ensure
Traffic Area Stabilization
� Operation of Permanent Facilities
Sediment Retention ❑ Flag Limits of SAO and open space
preservation areas
Surface Water Control ❑ Other
� Dust Control
Construction Se uence
� Part 14 STORMWATER FACIUTY DESCRIPTIONS Note: Include Facilit Summar and Sketch
Flow Control T e;Descri tion Water Qualit T e/Descri tion
LCI Detention ���� � Biofiltration �iC �4x`'�`�
/
❑ Infiltration ❑ Wetpool
❑ Regional Facility ❑ Media Filtration
❑ Shared Facility ❑ Oil Control
❑ Small Site BMPs ❑ Spiil Control
� Other ��� �AQ�� ❑ Small Site BMPs
❑ Other
200� Surface��'ater Design I�-lanual I;"1i05
4
K1V'�G C(_iL'�T'��, ���ASH1�G�:OI�, SLKFaLF �'��A:�bR DL=SIv'� 1�9,�\Li.qL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 15 EASEMENTSiTRACTS Part 16 STRUCTURAL ANALYSIS
Drainage Easement Cast in Place Vauli
Access Easement Retaining Wall
❑ Native Growth Protection Covenant ❑ Rockery > 4' High
❑ Tract ❑ Structural on Steep Slope
❑ Other ❑ Other
Part 17 SIGNATURE OF PROFESSIONAL ENGINEER
I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were
incorporated into this worksheet and the attached Technicai Information Report. To the best of my
know�e� information rovided here is accurate.
jipC
Si neo-Date
200� Surface�T�ater Design�lanual l;1i0�
5
I • -
lO.O OPERATIONS AND MAINTENANCE MANUAL
See the enclosed Operations and Maintenance (O&M) sections that follow.
27 �� � �
li:'�.i� �_��_�1 `�.�I �Y . Al =�._�H.�^.��� i��_A_ �'_'RF:A�. ?� �z,� '�TFR L>?-V1(iA .'.'1 "�A'L�:�i
APPENDIX A
��ZAINTEl\ANCE REQUIREl���ZEI��TS FOR FLO�'�'
CONTROL, CO���'E�'ANCE, AND ��'Q FACILITIES
NO. 1 - DETENTION PONDS
Maintenance Defect or Problem Conditions When Maintenance Is Needed Results Expected When
Component Maintenance Is Performed
General Trash 8 Debns Any trash and debris which exceed 1 cubic foot Trash and debns cleared from site.
per 1,000 souare feet(this�s about equal to the
amount of trash it would take to fill up one
standard size office garbage canj. In general,
ihere should be�o visual evidence of dump�ng.
Poisono�s Vegetation Any poisonous or nuisance vegetatfon which may No danger of poisonous vegetation
or Noxious W eeds constitute a hazard to County personnel or the where Co�nty personnel or the
public. public might normally be.
Coordination with Seattle-King
County Health Department
Contaminants and Oil,gasoline;or other contaminants of one gallon No contaminants present other than
Pollution or more,or any amount found that could: a surface film. (Coordinalion with
1)cause damage to plant,animal,or manne life; SeattlelKing Coanty Health
2)constitute a fire hazard;or 3)be flushed Department)
downstream during rain storms.
Unmowe� If facility is located in private residential area. When mowing is needed,
Grass;Groun�Cover mowing is needed when grass exceeds 18 grasstground cover should be
inches in he�ght. In other areas,the general mewed to 2 inches in height.
policy is to make the pond site match ad�acent Mowing of selected higher use areas
ground cover and terrain as long as there is no rather than the entire slope may be
interierence with the function of the facility. acceptable for some situations.
Rodent Hoies Any evidence of rodent holes if facility is acting Rodents destroyed and dam or berm
as a dam or berm,or any evidence of water repaired. (Coordination with
piping through dam or berm via rodent holes or SeattleiKing County Health
other causes. Department)
Insects When insects such as wasps and hornets Insects destroyed or removed from
interfere with maintenance activities. Mosquito site. Mosquito control: Swallow
complaints accompanied by presence of high nestmg boxes or approved larvicide
mosquito larvae concentrations(aquatic phase). applied.
Tree Growth Tree growth threatens integrity of berms acting Trees do not hinder maintenance
as dams,does not allow maintenance access, or activities. Harvested trees should
interferes with maintenance activity(i.e.,slope be recycled into mulch or other
mowmg,silt removal,vactoring,or equipment beneficial uses(e.g., alders tor
movements). If trees are a threat to berm (irewood).
integrity or not interfering with access, leave
trees alone.
^-i��C15 jurfa�e�'��a�er Dzsign�lanual—Appendix A 1`_4:�200�
A-1
aPPL�DI�:� �SAI'�;Tb\AT��E REQUtRE.l1E�ITS FLOVJ CO\TRi_lL, CO'�1�'E1",�.�CE, A�D V+'Q F.�CIiITIE�
NO. 1 - DETENTION PONDS
Maintenance Defect or Problem Conditions When Maintenance Is Needed Results Expected When
Component Maintenance Is Performed
Side Slopes of Pond Erosion Eroded damage��ver 2 inches deep�vhere cause Slopes should be stabifized by using
of damage is still present or where there is appropr�ate erosion control
potential for contmued erosion. measure(sl; e.g., rock
reinforcement, planting of grass,
Any erosion obsen�ed on a compacted berm compaction.
embankment.
If erosion is occurring on compacted
berms a licensed civil engineer
should be consulted to resolve
source of erosion.
Storage Area Sediment Accumulated sedimen;that exceeds 10°-� of the Sediment cleaned out to designed
designed pond depth. pond shape and depth; pond
reseeded if necessary to comrol
erosion.
Liner Damage Liner is visible and has more than three'.;<-inch Liner repaired or replaced
(If Applicablel holes in it.
Pond Berms(Dikes) Settlement Any part of berm that has settled 4 inches lower Dike should be built back to the !
than the design elevation. Settling can be an design elevation.
indication of more severe problems with the berm
or outlet works. A licensed civil engineer should
be consulted to determine the source of the
settlement.
Emergency Tree Gro�ti4h Tree growth on emergency spillways create Trees should be removed. If root
Overflo���-Spillway blockage problems and may cause failure of the system is small fbase less than 4
and Berms over 4 berm due to uncontrolled overtopping. inches)the root system may be left
feet in height. in place. Otherwise the roots should
Tree growth on berms over 4 feet in height may be removed and the berm restored.
lead to piping through the berm which coutd lead A licensed civii engineer should be
to failure of the berm. consuited for proper berm,'spillway
restoration.
Emergency Rock A4issing Only one layer of rock exists above native soil in Rep)ace rocks lo design standards.
Overflow,�Spiflway area five square feet or larger,or any exposure
of native soil at the top of out flow path of
spillway. Rip-rap on inside slopes need not be
replaced.
7,'24r'2005 ''005 Surface A['ater Design�fanual—Appendix A
A-�
�l'PE�llI?;=A �vl�ln'1-F�A\L� I�L<<�UIRLic1L;'�T��L�R FLU\\� �-U�'I'KC�L, CL�'��I��A;�iCL'._y'�U\��i� F.=�L iLITIf__�
NO. 4-CONTROL STRUCTURE/FLOW RESTRICTOR
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed
General Trash an� Dubr.s Dis'ance bei�veen debris buil�-_i; and bottom cf All trash ana debris remo�-ed
(Include� SedimenCl onf�ce plate �s less than � 5 feel
Structura! Gamage Structure is not secu�ely attached te manhole Structure securely attached to�vall
w�all and outlel pipe structure should suppert a! an�o�tlet pipe.
least 1,�00 Ibs of up or do�vn pressGre.
Structure is not in upright position(allo�.v�p tu Stn�cture ir.correct position
10`,%� from plumbl
Connect�ons to outlet pipe are not watertiaht and Connect�ons to outlet pipe are�vate�
sho��siqns of n;st. ught; structure repaired or replaced
and works as designed
Any holes—othe�than designed hoies—in the Structure has no holes other than
structure. deslgned holes.
Cleanout Gate Damaged or h4issing Cleanout gate�s not watertight or is m�ss�ng Gate is�vatertight and works as
designed.
Gate cannot be meve�up and do�vn b�-one Gate moves up and down easily and
mamtenance person. is watertight
Chainrrod leading to gate is missing or damaged. Chain is ir place and�vorks as
designed.
Gate is rusted over 50°o of its surface area. Gate is repaired or replaceC to meet
design standards.
Onf�ce Plate Dama�ec or��1issmg Control device is not working properiy du�to Plate is in place and works as
missmg,out of place, or ben(orif�ce plate. desiqne�.
ObstrucUons Any trash,debris, sediment, or vegetation Plate is free of all obstructions and
blocking the plate. works as designed.
Overflow�Pipe Obstruct�ons Any trash or debns blockmg (or having the Pipe is free of all obstructions and
potential of blockingl the overflow pipe. works as designed
Manhole See"Detention Tanks See"DetenUo�Tanks and Vaults'Table No. 3 See"Detention Tanks and Vaults'
and Vaults' Table No. 3
�005 Surface Water Design Manual–Appendix A 1/24/2005
A-5
aPPL\=1llI� A �1AL\TE\;�N�E Rb�liIRL-'��IE�TS FLO\�- CO��TRuL,COT'v E�"AT�CE,,4ND������FACILITIL-S
NO. 5 - CATCH BASINS
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is performed
Gene�ai Trash 8 Debris Trash or debris ef more than%z cubic foot which No Trash or debris tocate�
(Includes Sedimentj is lecated immed�ately in front of the catch basir, immediately m front of catch basin
openmg or is blocking capacity of the basin by opening.
more than 1 D°�b.
Trash or debris(in the basinl chat exceeds /s the No trash or debris in the catch
depth from the bottom of basin to invert the basin.
lowest pipe info or out of the basin.
Trash or debris in any inlet or outlet pipe blocking Inlet and outlet pipes free of trash or
more than '%3 of its height. debris.
Dead animals or vegetation that could ge�erate No dead animals or vegetaUon
odors that could cause complamts or dangerous present within the catch basin.
gases(e.g., methanel.
Deposits of garbage exceeding 1 c�bic ioot in No condition present which would
volume. attract or support the breedmg of
insects or rodents.
Structure Damage to Corner of frame extends more than'-< inch past Frame is even with curb.
Frame an�;or Top curb tace into the street(If applicable).
Slab
Top slab has holes larger than 2 square inches Top slab is free oi holes and cracks
or cracks wider than',�:inch(intent is to make
sure all material is running into basin).
Frame not sitting fiush on top slab, i.e.. Frame is sitting flush on top slab.
separation of more than'/<fnch of the frame from
the top slab.
� Cracks in Basin Cracks wider than;�inch and longer than 3 feet, Basin replace� or repaired to design
WallslBonom any evidence of soil particles entering catch standards.
basin through cracks,or maintenance person
judges that structure is unsound.
Cracks wider than Y�inch and longer than 1 foot No cracks more than ';a inch wide at
at the joint of any inleUoutiet pipe or any the joint of inleUoutlet pipe.
evidence of soil particles entering catch basin
through cracks.
SettlemenU Bas�n has settled more than 1 inch or has rotated Basin replaced or repaired to design
Misalignment more than 2 inches out of alignment. standards.
Fire Hazard Presence of chemicals such as natural gas,oil No flammable chemicals present.
and gasoline.
Vegetation Vegetation growing across and biocking more No vegetation blocking opening to
than 10°�0 of the basin opening basin.
Vegetation growing in inleUoutlet pipe joints that No vegetation or root growth
is more than 6 inches tall and less than 6 inches present.
apart.
Pollution Nonflammable chemicals of more than'/2 cubic No pollution present other than
foot per three feet of basin length. surface film.
Catch Basin Cover Cover Not in Place Cover is missing or only partiaily in place.Any Catch basin cover is closed
open catch basin requires maintenance.
Locking Mechanism Mechanism cannot be opened by on Mechanism opens with proper tools.
Not Working maintenance person with proper tools. Bolts into
frame have less than Yz inch of thread.
Cover Difficult to One maintenance person cannot remove lid after Cover can be removed by one
Remove applying SO Ibs.of lift; intent is keep cover from maintenance person.
sealing off access to maintenance.
Ladder Ladder Rungs Unsafe Ladder is unsafe due to missing rungs, Ladder meets design standards and
misalignment,rust,cracks,or sharp edges allows maintenance person safe
access.
1!��1'2005 �OQS Surface�'��acer Design I�lamial—Appendix :'1
A-6
APPENDIX A '.�4Ai'�1TE\.q?�CE REQL:IRE�1E'�TS FOR FLOVI'CONTROL, COT`T�'EYANCE.AND VJQ FACILI7-IL-S
NO. 5 -CATCH BASINS
Maintenance Defect or Probiem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is pertormed
Metal Grates Unsafe Grate Grate with caen�ng�ti�der than';'9 mch Grate openirg meets desi9n
ilf Applicable i Openmg standards.
Trash and Debris Trash and debris that is blocking more than 20`.%� Grate free of trash and oebris.
of g�a,e surface ��
Damaged or Missing Grate missinq or broken member(s)of the g�ate Grate is in place and meets design I
stancards. ;
I
NO. 6- DEBRIS BARRIERS (E.G., TRASH RACKS)
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed.
Generat Trash and Debris Trash or debris that is plugging more than 20"' Barrier dear to receive capac�ty
of the openings in the barr�er. flove.
��1eta! Damaged��t�ssinq Bars are bent out of shape more thar�3 inches. Bars in place �vith no bends more
Bars- than'i<inch.
Bars are missing or enUre barner missmg. Bars in place accordmg to design.
Bars are loose and rust is causing 50% Repair or replace barrier to design
�eterieration to any part of barrier standards.
NO. 7- ENERGY DISSIPATERS
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed.
E�Rernal:
Rock Pad h4issing or Moved Only one layer of rock exists above native soil in Replace rocks to deslgn standards.
Rock area five square teet or larger,or any exposure
of native soil.
Dispersion Trench Pipe Plugged v:itn Accumulated sediment that exceeds 20%of the Pipe cleaned�flushed so that it
Sediment design depth. matches design.
Not Dischargmg Visual evidence of water discharging at Trench must be redesigned or
Water Properly concentrated points along trench{normal rebuilt to siandards.
I condition is a"sheet flow"of water along trench�.
Intent is to prevent erosion damage.
PerforaUons Plugged. Over Yz of perforations in pipe are plugged with Clean or replace perforated pipe.
debris and sediment.
� Water Flows Out Top Mamtenance person observes water flowing out Facility must be rebuilt or
I of"Distributor"Catch during any storm less than the design storm or redesigned to standards
Basin. its causing or appears likely to cause damage.
Receiving Area Over- Water in receiving area is causing or has No danger of landslides.
I Saturated potential of causing landslide problems.
Intema!:
Manhole;Chamber Worn or Damaged Structure dissipating flow deteriorates to%or Replace structure to design
Post Bafftes,Side of original size or any concentrated wom spot standards.
Chamber exceeding one square foot whlch would make
structure unsound.
"_'OG� Surface Water Design'�-tanual—Appendix A 1?�4i2005
A_-,
APPENDIX_4 �1A]?�TEI�ANCE F�EQLIRETQL-NTS FLO���CUATROL,CO1���EY.Z�ICE. ANU��'Q FACILITI�S
NO. 8 - FENCING
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
General P�4�ssing or Broken Any defed in the tence that permits easy entry to Parts!n place to proti�ide adeouate
Parts a facilih-. secunh.
Erosion Erosion more than 4 inches high and 12-18 No opening unoer the fence that
inches wide permitting an opening under a fence exceeds 4 inches in height.
1"d�re Fences Damaged Parts Post out of plumb more than 6 inches. Post plumb to within 1'/z�nches.
Top rails bent more than 6 i�ches. Top rail free of bends greate�than
1 inch
Any part of fence(including post,top rails,and Fence is aligned and meets design
fabricj more than 'I ioot out of design ahgnment. standards.
P.iissing or loose tension wire. Tension wire in place and holding
fabric.
�vliss�ng or loese barbed wire that is sagging Barbed wire in place with less than
more than 2'.; mches between pos!s. ',�.inch sag between post
Extension arm missmg, broken,or bent out of Extension arm in place with no
shape more than 1%inches. bends larger than'/.inch.
Deter�orated Paint or Part or parts that have a rusting or scaling Structurally adequate posts or parts
Protective Coating condition that has affected structurat adequacy. with a uniform protective coating.
Opernngs m Fabric Openinqs in fabric are sucn that an 8-inch No openings in fabric.
diameter ball could fit through.
NO. 9- GATES
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Generai Damaged or��1issing Missing gate or lockmg devices. Gates and Lockmg devices in place.
Members
Broken or missing hinges such that gate cannot Hinges intact and lubed. Gate is
be easily opened and closed by a maintenance working freely.
person.
Gate is out of plumb more than 6 inches and Gate is aligned and vertical.
more than 1 ioot out of design alignment.
Missing stretcher bar,stretcher bands,and ties. Stretcher bar, bands, and ties in
place.
Openings in Fabric See°Fencing"Table No. 8 See"Fencing"Table No. 8
1 �4 �OUS 2005 Surface Water Design Manual—Appendix A
A-8
r1PPL^T�'DTX.A 'vf.AT�TET�ANCE REQUIREN(FT�TS FOR FLOW CONTROL;CO�VLl'ANCE,A�D��'Q FACILITTES
NO. 10- CONVEYANCE PIPES AND DITCHES
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Pipes Sed�ment 8 Debris Acc�m�lated sed�men:tha' exceeds 20°•0 of tr,e P�pe cleanea of all sed�ment and
diameter of the p:pe debris
Vegetation Vegetation that reduces free movement of water All vegetation removed so�ti�ate�
through pipes. flo�ti�s freely through pipe=.
Damaoed Protective coat;ng�s damagec; rust is ca�sir.q Pipe�epaired or replaced
more than 50�< deterio�ation to any part of pipe.
Any dent that decreases the cross SecLon area Pipe repa�red or replaced.
of pipe by more than 20°�0.
Open Dilches Trash 8 Debns Trash and debris exceeds 1 cub�c foot per 1,000 Trash and debris cleared from
square feet ot ditch and slopes ditches.
�ISed�ment Accumulated secimen;that exceeds 20`.,� o`the Ditch cleanedlf�ushe�oi all
� design depth. sediment and debns so that it
I matches design.
Vegetation Vegetation that reduces free movement of water tN'ater flows freely through drtches.
through ditches.
Erosion Damage to See"Detention Ponds'Table No. 1 See'Detentior Ponds"Table fvo. 1
Slopes
Rock LiNng Out of h4aintenance persor can see native soil beneath Replace rocks to design standards.
Place or Missmg (Ii the rock lin�ng.
Applicable.l
' NO. 11 - GROUNDS (LANDSCAPING)
Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When
Component Maintenance is Performed
General �ti'eeds SNeeds growing in more than 20°io of the Weeds present in less than 5°%of
(Nonpoisonous, not landscaped area(trees and shrubs only). the landscaped area.
noxious)
Safety Hazard Any presence of poison ivy or other poisonous No poisonous vegetation present in
vegetation. landscaped area.
Trash or Litter Paper, cans, bottles,totaling more than 1 cubic Area clear of litter.
I foot within a landscaped area(trees and shrubs
only}of 1,000 square feet.
Trees and Snrubs Damaged Limbs or parts oi trees or shrubs that are split or Trees and shrubs w�th less than 5°0
broken which affect more than 25°ro oi the total of total foliage with split or broken
foliage of the tree or shrub. �imbs.
I' Trees or shrubs that have been blown down or Tree or shrub in place tree of injury.
knocked over.
Trees or shrubs which are not adequately Tree or shrub in place and
supported or are leaning over;causing exposure adeauately supported;remove any
of the roots. dead or diseased trees.
��00;� �urt�a�e A\�are�r Design \1anual—:�ppendik-A 1;�2412005
A-9
aPPET��DiY A Iv1A1TTE?��,�.NCE REQL�IRL'�4E?�TS TLO��'CO'�?ROL. CO�IV'EI�A?�CL-. :�?�D��'il F:4CILTTIES
NO. 12 -ACCESS ROADS
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed
General Trash and Debns Trash and debns exceeds 1 cub�c foot per 1,000 Rcadwav free of deb�is �ahich could
square feet(i.e.,trash and debns�tioul� f�ll up damaae tires.
one standards size garbage can).
Blocke�� Roado;a} Debns which could damage vehicle tires(�lass Roadwav free oi debns which could
or metal). damage t�res.
Any obstruct�on which reduces clearance above Roadway overhead clear to 14 feet
road surface to less than 14 feet. high.
Any obstruction restricting the access to a 10-to Obstruction removed to auow at
12-foot width for a distance oi more than 12 feet least a 12-foot access.
or any point restricLnc access to less thar a 1G-
foot�-idth.
Roa� Sur(a;:e Settlement, Potholes, When any surface defect exceeds 6 inches in Road surface uniformly smooth witr�
Mush Spots, Ruts depth and 6 square feet m area. In general,any no evidence of settlement. potholes,
surface defect which hlnders or prevents mush spots: or ruts.
maintenance access.
\'egetatier in Road Weeds growing m the road surface that are more Road surface free of weeds taller
S�rface than 6 inches tall and less than 6 inches tall and than 2 inches.
less than 6 inches apart wlthin a 400-square foot
' area.
Modular Grid Build-up ot sediment mildly contammated with Removal of sediment and disposal
IPavement petroleum hydrocarbons. in keeping with Health Department
recommendations for mildly
contammated soils or catc�basin
sediments.
Shoulders an� Erosion Damage Erosion wlthm 1 foot of the roadway more than 8 Shoulder free of erosion and
Ditches mches wide and 6 inches deep. matching the surrounding road.
Weeds and Brush Weeds and brush exceed 18 inches m neight or Weeds and brush cut to 2 inches in
hinder maintenance access. height or cleared in such a way as!o
allow maintenance access.
1;24;'2005 20U5 Surface Water Design Manual—Appendix A
A-l 0
AFPENDI�A ��SAITTENANCE REQT�IRL�4E�1TS FOR FLOV+'CONTROL,CO\VE5'A?�ICL;AND�VQ FACILITIES ���
NO. 13 - BASIC BIOFILTRATION SWALE
� Maintenance Defect or Problem Condition When Maintenance is Needed Recommended Maintenance to
Component Correct Problem
S���ale Section Sediment Sediment depth exceeds 2 Inches Remove sediment deposits on grass
Accumulation on treatment area of the bioswale. ,
Grass lNhen finished,swale should be
level from side to side and drain
freety toward outlet. There should
be no areas of standinq water once
�� inflow has ceased.
Standing l�'t'ater 'vti'hen water stands in the stiroale between storms Any of the foilowing may apply:
and does not drain freely. remove sediment or trash
bfockages, improve grade from head
to foot of swale,remove clogged
check dams,add underdrains or
( corn�ert to a wet biofiltration swale.
Constant Baseflotiv VVhen small quantities of water continually flow Add a low-flo��pea-aravel drain the
through the swale, even when it has been dry fer length of the swale or bypass the
weeks,and an eroded,muddy channet has baseilow around the s+n�ale.
formed in the swale bottom.
Poor Vegetation \h%hen grass is sparse or bare or eroded patches Determine�vhy grass gro�N,h is poor
Coverage occur in more than 10°�b of the s�vale bottom and correct that condition. Re-piant
with plugs of grass from the upper
slope: plant In the swale bottom at
8-inch intervals,or re-seed into
loosened,fertile soil. ,
Defective Veqetation VJhen the grass becomes excessively tall h4ow vegetation or remove nuisance
(greater than 10 inchesj or when nuisance weeds vegetation so that flow not impede�.
and other veaetation starts to take over. Grass should be mowed to a height
of 3 to 4 inches. Remove grass
clippinas. '
Excessive Shading Grass growth is poor because sunlight does not If possible,trim back over-hanging
reach swale. limbs,remove brushy vegetation on
adjacent slopes.
Trash and Debris Trash and debris accumulated in the bioswale. Remove trash and debris from
Accumulation bioswale.
Erosion/Scouring Eroded or scoured swale bottom due to flow For ruts or bare areas less than 12 ,
channelization,or higher flows. inches wide, repair the damaged
area by filling with crushed gravel.
The grass will creep in over the rock
in time. Ii bare areas are large,
generally greater than 12 inches
wide,the swale shouid be re-graded
and re-seeded.For smaller bare
areas:overseed when bare spots
are evident,or take plugs of grass
from the upper slope and plant in the
swale bottom at 8-inch intervals.
InleVOutlet Sediment and Debris Inletroutlet areas clogged with sed�ment and�or Remove material so that ihere fs no
debris. clogging or blockage in the inlet and
outlet area.
Flow Spreader ConcentrateC Flow Flow spreader uneven or clogged so that flows Level the spreader and clean so that
are not uniformly distributed through entire swale flows are spread evenly over entire
width swale width.
�OOS Surfacz«`a[er Desi�i Alanual—Appendix.A 1!24!2005
A-11
:aP-FE\DI�A �9.=�1�TETAT�CE REc�T=iFtE?�iF.VTS FT O��'(,n\TRC�I.,CONVEYA?�CL-.AND�l'i? F.�CILITIE�
NO. 14-WET BIOFILTRATION SWALE
Maintenance Defect or Problem Condition When Maintenance is Needed Recommended Maintenance to
Component Correct Problem
Swale Sechon Sediment Sedimeni depth exceeds 2 incnes in 10°�,of the Remove sediment depos�ts in
Accumulation swale treaiment area. treatment area.
lNater Depth VVater not retained to a dep'.h oi abo�t 4 inches Build up or repair outlet berm so that
during the wet season. water is reta�ned in the wet swaie.
Defec;lve VVetland Vegetat�on becomes sparse and does not Determine ca�se of lack of vigor of
��egetation provide adequate fdtration, OR vegetafion is vegetation and correct. Replant as
crowded out by very dense clumps of cattail needed For excessive cattail
which do not allow water to flow through the growth, cut cattail shoots back and
clumps. compost offsite. Note:normafly
wetland vegetation does not need to
be harvested unless die-back rs
causing oxyger depleUor, in
downstream waters.
Trash and Debris Trash and debris accumulated in the wet swale. Remove trash and debris from wet
AccumulaUon swale.
Erosion�Scourino S�ti�ale has eroded or scoured due to flow Check design flows to assure swale
channelization, or higher ilows. is large enough to handle fiows.
Bypass excess flows or enlarge
swale Replant eroded areas with
fibrous-rooled plants such as
Juncus eHusus(soft rush)in wet
areas or snowberry
jSymphoricarpos a.�bus)m dryer
areas.
Inlet 0utlet Sediment anC Debris InleUoutlet area cloggec�vith sediment and-or Remove clogging or blockage in the I
debris inlet and outlet areas. I
NO. 15- FILTER STRIP
Maintenance Defect or Problem Condition When Maintenance is Needed Recommended Maintenance to
Component Correct Problem
Grass Strip Sediment Sediment depth exceeds 2 inches. Remove sediment deposits re-level
Accumulation on so slope is even and flows pass
' Grass evenly through strip.
Defective Vegetation When the grass becomes excessively tall Mow grass, control nuisance
(greater than 10 inches}or when nuisance weeds vegetation such that flow not
and other vegetation starts to take over impeded. Grass should be mowed to
a height between 3-4 inches.
Trash and Debris Trash and debris accum�lated on the fitter stnp. Remove trash and debris from filter.
Accumulation
Erosion-Scouring Eroded or scoured areas due to flow For ruts or bare areas less than 12
channelization,or higher flows. inches wlde, repair the damaged
area by filling with crushed gravel.
The grass will creep in over the rock
m time. If bare areas are large,
generally greater than 12 inches
wide,the filter strip should be re-
graded and re-seeded. For smalier
bare areas,overseed when bare
spots are evident.
Flow Spreader Concentrated Flo,ro Flow spreader uneven or clogged so that flows Level the spreader and clean so that
are not uniformly distributed through entire filter flows are spread evenly over entire
width. filter width.
1:24!2005 �U05 Surface Water Design�9anoal—Appendix A
.A-12
11.0 CONCLUSION
This analysis is based on data and records either supplied to or obtained by AHBL. These
documents are referenced within the text of the analysis. The analysis has been
prepared using procedures and practices within the standard accepted practices of the
industry.
AHBL, Inc. �l� '�
,'�-�U
Charles "Ted" Hill, E.I.T.
Project Engineer
CTH/Isk/sca i
December 2006
Revised May 2007
K:1Prime\Yr_2006�206200 Cedar River�STORM\Reports�20070326_Rpt_S[ormDrainTIR_206200-wp2.doc
20070508_RptREV_StormDrainTIR_206200.doC I
i
28 �� � O
Project ( �� ���/�r Project No. ��; 7 . /� ❑Page_L of�_
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❑SEATTLE
1200 6th Avenue
Suite 1620 i
Seattle,WA i
98101-3123 �
If this dces not meet with your understanding,please contact us in writing within seven days.THANK YOU. 206.267.2425
206.267.2429 FAX
Project �C��r �L,[�/` Project No. ����.r �� ❑ Page�of�_
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Existing Land Use Summary
' :,� .�,�;
� - �, �`:�
'--,�rea---
- -- �
_ Till Forest' 11.92 acres: _ -
TiN Pasture 0.00 acres _ �
Till Grass 0.00 acres
Ou#wash Forest, D.00 acres - -
Ouiwash Pasture; 0.00 acres = _
Outwash Grass �.00 acres' =- _ -
1Netland O.DO acres
- impervious; 0.00 acres -
_ _ -- .-- -
�To#a!- - -- -
; 11.92 acres;
Sca1e Factor : 1.00 Hourly Fleduced
Time Series: exis� }>�
Compute Time Series �
- .� - - - .�...�.s_� e..._.. ----- -- -- - -
h+iodify User Input �
:._._�:__-----------�- _ ____.___Y - -._ __. _�__ _---_ _______.____._-- ----.
File for computed Time Series [.TSF�
Cedar River Corporate Park
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F ; ��.
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` Till P�s#ure' U.32 a�cre�;
� ;
E
Till �rass'; �1 .�� ��r���
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� ��ca1� Fac#ar : 1 .00 Haurl� I�educed
� Tim� Seri�e�: de�+ >�
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,
� C�mpute Tim� Series �
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� ; File for camputed Time �eries [.T�F�
.
'�1Yzi'�i':ld1u.J .•. _..... ..•. . •-._ .•. '_ WY:6..hwYA'Aroon �.a�a•,r.r.� r.aw�a..s�o� �S7`W.dII'.8"SY tt"5'K731"i:"`�".P.S ...� . ., ...�
Recvon CaWurr. 1 L51.17am�Fndav.5/1iN7.382w s 450h
Flow Frequency Cedar River Corporate Park
s
� Flo�a Fre uenc �nal sis
s`' 4 � '.�
P
y _________________�______.__��____________-________--_____
� Time Serie� File : exi�t . tsf
� Proj ect I,ocat ic��i : 5ea-Tac
; ---�nnual Peak Flo�r l�ates--- -----Flo� Frequency Analysis------- �2gT �TEtZ.
; Flo� Rate Rank Time af Peak - - Peal�s - - Rank Return Prob
} �CFS) (CFS� I�eriad �'`�u -�yr
k 0 . 752 � C�'D9r'D1 18 : 00 Q . 962 1 1Q� . Qa 0 . 9�(J
# =U.Sx 0,331
� . �04 7 1/Cl�,r`0� 3 : 00 0 . 752 2 �5 . QQ Q . 4617
� a . 55� �4 2,!28�03 3 : QQ 0 . 57� 3 1� . OQ 0 . "�OCI = C�.11�5�
Q . Q2D B 3f24.�D4 2� : OQ 0 . 557 4 5 . a� D . 80D
i 0 . 331 6 1r'05.�05 8 : �0 a . 48� 5 3 . 00 CI . 66�
� 0 . 5�7 3 1�18.�06� 21 : 00 0 . 331 6 2 . OD a . S�D
� 0 . �67 5 11�'24.�06 4 : 00 0 . 204 7 1 . �a 0 . 231
� . 962 1 1�'09t08 9 : 00 0 . 0�0 8 1 . 1a 0 . 091
�Computed Peaks 0 . 89Z 50 . 00 0 . 980
Flo� Frequency Analy�is TNT���t. 5►z�
--------------------------------------------------------
' Time 5eries Fi le : dev . t�f �y r' �r"5� S'�},
� Praject Zncation : Sea-Tac ` ��_��
,:
� ---t�nnual Peak Flo� Ra�e�--- -----Flow Frequency �nal�rsi�-------
; Flo� Rate Rank Time of Peak - - P�ak� - - Ran�C Return Prrb = 0,�'iZ -U,►�S�
} �CFS) �CFS� Period -
�
z . �o � 2�0��01 2 : aa � . �5 i ioa . aa o . ��a �5
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� . �a � e�z��a� � : oo � . �� � 5 . ao o . eaa
� � . 72 �4 10�28r0� 16 : 00 2 . 56 5 3 . 0� 0 . 6�6?
x
; � . 56 5 1�'18.'�6 16 : 00 � . �0 6 � . 00 0 . 500
Y 3 . 33 � 1Df26}06 O : OD 2 . 28 7 1 . 3� D . Z31 II
; 4 . 75 1 1�"09rp� � : OQ � . 03 � 1 . 10 Q . �91
�Compu t ed F'ealcs 4 . 2 7 5� . a 0 0 . 9 B 0
ReOion Cat%iure. 71:53�U2am•Fndav.Y15/07.613w x 495h
Retention/Detention Facility
Type of Facility: Detention Pond
Side Slope: 0.00 H:iV
Pond Bottom Length: 322.00 ft
Pond Bottom Width: 55.00 ft
Pond Bottom Area: 17710. sq. ft
Top Area at 1 ft. FB: 17710. sq. ft
0.407 acres
Effective Storage Depth: 9.10 ft
Stage 0 Elevation: 14.00 ft
Storage Volume: 161161. cu. ft
3.700 ac-ft
Riser Head: 9.10 ft
Riser Diameter: 18.00 inches
Number of orifices: 2
Full Head Pipe
Orifice # Height Diameter Discharge Diameter
(ft) (in) (CFS) (in)
1 0.00 1_63 0.216
2 5.30 2.75 0.400 6 .0
Top Notch Weir: None
Outflotv Rating Curve: None
Stage Elevation Storage Discharge Percolation Surf Area
(ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) (sq. ft)
0.00 14.00 0. 0.000 0.000 0.00 17710.
0.02 14.02 354. 0.008 0.009 0.00 17710.
0.03 14.03 531. 0.012 0.013 0.00 17710.
0.05 14.05 886. 0.020 0.016 0.00 17710.
0.07 14.07 1240. 0_028 0.019 0.00 17710.
0.08 14.08 1417. 0.033 0.021 0.00 17710.
0.10 14.10 1771. 0_041 0.023 0.00 17710.
0.12 14.12 2125. 0.049 0.025 0.00 17710.
0.14 14.14 2479. 0.057 0.026 0.00 17710.
0.29 14.29 5136. 0.118 0.039 0.00 17710.
0.44 14.44 7792. 0.179 0.048 0.00 17710.
0.60 14.60 10626. 0.244 0.055 0.00 17710.
0.75 14.75 13283. 0.305 0.062 0.00 17710.
0.91 14.91 16116. 0.370 0.068 0.00 17710.
1.06 15.06 18773. 0.431 0.074 0.00 17710.
1.22 15.22 21606. 0.496 0.079 0.00 17710.
1.37 15.37 24263. 0.557 0.084 0.00 17710.
1.52 15.52 26919. 0.618 0.088 0.00 17710.
1.68 15.68 29753. 0.683 0.093 0.00 17710 .
1.83 15.83 32409. 0.744 0.097 0.00 17710.
1.99 15.99 35243. 0.809 0.101 0.00 17710.
2.14 16.14 37899. 0.870 0.105 0.00 17710.
2.29 16.29 40556. 0.931 0.109 0.00 17710.
2 .45 16.45 43390. 0.996 0.112 0.00 17710.
2 .60 16.60 46046. 1.057 0.116 0.00 17710.
2.76 16.76 48880. 1.122 0.119 0.00 17710 .
2 .91 16.91 51536. 1. 183 0. 122 0.00 17710.
3 .07 17 .07 54370 . 1.248 �. 125 0. 00 17710.
3.22 17.22 57026. 1.309 0.129 0.00 17710.
3.37 17.37 59683. 1.370 0.132 0.00 17710.
3.53 17.53 62516. 1.435 0.135 0.00 17710.
3.68 17.68 65173. 1.496 0.137 0.00 1771G.
3.84 17.84 68006. 1.561 0.140 0.00 17710.
3.99 17.99 70663. 1.622 0.143 0.00 17710.
4.15 18.15 73497. 1.687 0.146 0.00 17710.
4.30 18.30 76153. 1.748 0.149 0.00 17710.
4.45 18.45 78609. 1. 809 0.151 0.00 17710.
4.61 18.61 61643. 1. 674 0.154 0.00 17710.
4.76 18.76 64300. 1.935 0.156 0.00 17710.
4.92 18.92 87133. 2.000 0.159 0.00 17710.
5.07 19.07 89790. 2. 061 0.161 0.00 17710.
5.23 19.23 92623. 2.126 0.164 0.00 17710.
5.30 19.30 93663. 2.155 0.165 0.00 17710.
5.33 19.33 94394. 2.167 0.167 0.00 17710.
5 .36 19.36 94926. 2.179 0.173 0.00 17710.
5 .39 19.39 95457. 2.191 0.184 0.00 17710.
5.41 19.41 95811. 2.200 0.197 0.00 17710. �
5.44 19.44 96342. 2.212 0.214 0.00 17710. I�
5.47 19.47 96874. 2.224 0_234 0.00 17710. I
5.50 19.50 97405. 2.236 0.258 0.00 17710.
5.53 19.53 97936. 2.248 0.267 0.00 17710.
5.68 19.68 100593. 2.309 0.298 0.00 17710. '
5.84 19.84 103426. 2.374 0.323 0.00 17710.
5.99 19.99 106083. 2.435 0.346 0.00 17710.
6.15 20.15 108917. 2.500 0.366 0.00 17710.
6.30 20.30 111573. 2.561 0.385 0_00 17710.
6.45 20.45 114229. 2.622 0.402 0.00 17710.
6.61 20.61 117063. 2.687 0.419 0.00 17710.
6.76 2D.76 119720. 2.748 0.434 0.00 17710.
6.92 20.92 122553. 2.813 0.449 0.00 17710.
7.07 21.07 125210. 2.874 0_463 0.00 17710.
7_23 21.23 128043_ 2.939 0.477 0.00 17710.
7.38 21.38 130700. 3.000 0.490 0.00 17710.
7.53 21.53 133356. 3.061 0.503 0.00 17710.
7.69 21.69 136190. 3.126 0.516 0.00 17710.
7.84 21.84 138846. 3.187 0.528 0.00 17710.
8.00 22 .00 141680. 3.253 0.539 0.00 17710.
8.15 22 .15 144336. 3.314 0.551 0.00 1771�.
8.31 22.31 147170. 3.379 0.562 0.00 17710.
8.46 22.46 149827. 3.440 0.573 0.00 17710.
8.61 22 .61 152483. 3 .501 0.584 O.OQ 17710.
8.77 22.77 155317. 3.566 0.594 0.00 17710.
8.92 22.92 157973. 3.627 0.604 0.00 17710.
9.08 23.08 160807. 3 .692 0.614 0.00 17710.
9.10 23.10 161161. 3.700 0.616 0.00 17710.
9.20 23.20 162932. 3.740 1.080 0.00 17710.
9.30 23.30 164703. 3.781 1.940 0.00 17710.
9.40 23.40 166474. 3.822 3.040 0.00 17710.
9.50 23.50 168245. 3. 862 4.340 0.00 17710.
9.60 23 .60 170016. 3.903 5.810 0.00 17710.
9.70 23.70 171787. 3.944 7.240 0.00 17710.
9.80 23.80 173558. 3. 984 7.7B0 0.00 17710.
9.90 23.90 175329. 4.025 8.280 0 .00 17710.
10.00 24.00 177100. 4 .D66 8.740 0.00 17710.
10.1� 24 .10 178871. 4 . 106 9.190 0.00 17710.
10.20 24.20 180642. 4.147 9.610 0.00 17710.
10.30 24.30 182413. 4.168 10.010 0.00 17710.
10.40 24.40 184184. 4.228 10.400 0.00 17710.
10.50 24.50 185955. 4 .269 10.770 0.00 17710.
10_60 24.60 187726. 4.310 11.130 0.00 17710. �
10_70 24.70 189497. 4 .350 11.470 0.00 17710.
10.80 24.80 191268. 4 .391 11.810 0.00 17710.
10.90 24.90 193039. 4.432 12.140 �.00 17710.
11_00 25.00 194810_ 4 .472 12.460 0.00 17710.
Hyd Inflow Outflow Peak Storage I
Target Calc Stage Elev (Cu-Ft) (Ac-Ft) I
1 4 .75 ******* 2.67 9.37 23.37 165880. 3 .808 '
2 2 .40 0.75 0.67 9.11 23.11 161357. 3 .704
3 3.33 ******* 0.53 7.87 21.87 139392. 3.200
4 2 .86 ******* 0.51 7.65 21.65 135460. 3.110
5 2.56 ******* 0.40 6.43 20.43 113788. 2.612
6 1.74 ******* 0.23 5.46 19.46 96775. 2.222
7 2_03 ******* 0.16 5.18 19.18 91744. 2.106
8 2.28 ******* 0.14 3.90 17.90 69075. 1.586
---------------------------------
Route Time Series through Facility
Inflow Time Series File:dev.tsf
Outflow Time Series File:rdout
Inflow/Outflow Analysis
Peak Inflow Discharge: 4.75 CFS at 6:00 on Jan 9 in Year 8
Peak Outflow Discharge: 2.67 CFS at 10:00 on Jan 9 in Year 8
Peak Reservoir Stage: 9.37 Ft
Peak Reservoir Elev: 23.37 Ft
Peak Reservoir Storage: 165880. Cu-Ft
. 3.808 Ac-Ft
Flow Frequency Analysis
Time Series File:rdout.tsf
Project Location:Sea-Tac
---Annual Peak Flow Rates--- -----Flow Frequency Analysis-------
Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob
(CFS) {CFS) (ft) Period
0.672 2 2/09/O1 20:00 2 .67 9.37 1 100.00 0.990
0.163 7 1/07/02 3 :00 0.672 9.11 2 25.00 0.960
0.513 4 3/06/03 22:00 0.530 7.87 3 10.00 0.900
0.141 8 8/26/04 7:00 0.513 7.65 4 5.00 0.800
0.230 6 1/OS/05 3:00 0.399 6.43 5 3 .00 0.667
0.399 5 1/18/06 23:00 0.230 5.46 6 2.00 0.500
0.530 3 11/24/06 8:00 0.163 5.18 7 1.30 0.231
2.67 1 1/09/OS 10:00 0.141 3.90 8 1.10 0.091
Computed Peaks 2.01 9.31 50.00 0.98Q
Flow Duration from Time Series File:rdout.tsf
Cutoff Count Frequency CDF Exceedence_Probability
CFS % � �
0.010 28792 46.954 46.954 53 .046 0.530E+00
0 .028 6423 10.475 57.428 42 .572 0.426E+00
0 . 04? 5623 9.170 60.593 33 .402 0 .334E+00
0.066 5814 9.481 76.080 23 .920 0.239E+00
0.085 4745 7.738 83.818 16.182 0.162E+00
0.104 4051 6.606 90.424 9.576 0.958E-01
0.123 2161 3.524 93.948 6.052 0.605E-01
0.142 1600 2.609 96.557 3.443 0.344E-01
0.161 1408 2.296 98.854 1.146 0.115E-01
0.180 311 0.507 99.361 0.639 0.639E-02
0.199 27 0.044 99.405 0.595 0.595E-02
0.217 15 0.024 99.429 0.571 0.571E-02
0.236 17 0.028 99.457 0.543 0.543E-02
0.255 6 0.010 99.467 0.533 0.533E-02
0.274 23 0.038 99.504 0.496 0.496E-02
0.293 35 0.057 99.561 0.439 0.439E-02
0.312 29 0.047 99.609 0.391 0.391E-02
0.331 32 0.052 99.661 0.339 0.339E-02
0.350 22 0.036 99.697 0.303 0.303E-02
0.369 19 0.031 99.728 0.272 0.272E-02
0.388 25 0.041 99.768 0 .232 0.232E-02
0.406 26 0.042 99.811 0 .189 0.189E-02
0.425 10 0.016 99.827 0.173 0.173E-02
0.444 14 0.023 99.850 0.150 0.150E-02
0.463 11 0.018 99.866 0.132 0.132E-02
0.482 14 0.023 99.891 0.109 0.109E-02
0.501 12 0.020 99.910 0.090 0.897E-03
0.520 16 0.026 99.936 0.064 0.636E-03
0.539 12 0.020 99.956 0.044 0.440E-03
0.558 9 0.015 99.971 0.029 0.294E-03
0.577 4 0.007 99.977 0.023 0.228E-03
0.595 6 0.010 99.987 0.013 0.130E-03
0.614 6 0.010 99.997 0.003 0.326E-04
0.633 1 0.002 99.998 0.002 0.163E-04
0.652 0 0.000 99.998 0.002 0.163E-04
0.671 0 0 .000 99.998 0.002 0.163E-04
Discharge Volume
Discharge Volume from Time Series
rdout.tsf
between 10/O1/00 OO:QO and 09/30/08 23 :59
8581355. Cu-Ft or 197 .001 Ac-Ft in 2920.0 days
Duration Comparison Anaylsis
Base File: exist.ts�
New File: rdout.ts�
Cutoff Units: Discharge in CFS
-----Fraction of Time---- ---------Check of Tolerance------
Cutoff Base New �Change Probability Base New $Change
0.165 I 0.95E-02 0.73E-02 -23 .7 � 0.95E-02 0.165 0.163 -1.4
0.210 � 0.63E-02 0.58E-02 -8.8 � 0.63E-02 0.210 0.182 -13 .6
0.255 � 0.50E-02 0.53E-02 7.6 � 0.50E-02 0.255 0.274 7.3
0.300 ( 0.37E-02 0.42E-02 13.7 � 0.37E-02 0.300 0_320 6.4
0.346 � 0.28E-02 0.31E-02 9.2 � 0.28E-02 0.346 0.362 4.?
0.391 I 0.22E-02 0.23E-02 2 .2 I 0.22E-02 0.391 0.392 0.2
0.436 � 0.15E-02 0.16E-02 6.7 I 0.15E-02 0.436 0.449 2.9
0.481 I O.10E-02 0.11E-02 8 .1 � O.10E-02 0.461 0.489 1.8
0.526 � 0.62E-03 0.60E-03 -2 .6 � 0.62E-03 0.526 0.525 -0.3
0.571 I 0.34E-03 C.24E-03 -28 .6 � 0.34E-03 0.571 0.550 -3 .�
0.616 � 0.21E-03 0.33E-04 -84 .6 � 0.21E-03 0.616 0.578 -6.2
0.662 � 0.16E-03 0.16E-04 -90.0 � 0.16E-03 0.662 0.588 -11.1
0.707 � 0.98E-04 O.00E+00 -100.0 � 0.98E-04 0.707 0.605 -14 .4
0.752 ( 0.16E-04 O.00E+00 -100.0 � 0.16E-04 0.752 0.671 -10.7
Maximum positive excursion = 0.023 cfs ( 9.2�)
occurring at 0.244 cfs on the Base Data:exist.tsf
and at 0.267 cfs on the New Data:rdout.tsf
Maximum negative excursion = 0.121 cfs (-16.3s)
occurring at 0.742 cfs on the Base Data:exist.tsf
and at 0.621 cfs on the New Data:rdout.tsf
----------------------------------
Route Time Series through Facility
Inflow Time Series File:dev.tsf
Outflow Time Series File:rdout
Inflow/Outflow Analysis
Peak Inflow Discharge: 4 .75 CFS at 6:00 on Jan 9 in Year 8
Peak Outflow Discharge: 2.67 CFS at 10:00 on Jan 9 in Year 8
Peak Reservoir Stage: 9.37 Ft
Peak Reservoir Elev: 23.37 Ft
Peak Reservoir Storage: 165860. Cu-Ft
. 3 .808 Ac-Ft
Flow Frequency Analysis
Time Series File:rdout.tsf
Project Location:Sea-Tac
---Annual Peak Flow Rates--- -----Flow Frequency Analysis------
Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob
(CFS) (CFS) (ft) Period
0.672 2 2/09/O1 20:00 2.67 9.37 1 100.00 0.990
0.163 7 1/07/02 3 :00 0.672 9.11 2 25.00 0.960
0.513 4 3/06/03 22 :00 0.530 7.87 3 10.00 0.900
0.141 8 B/26/04 7 :00 0.513 7.65 4 5.00 0.800
0.230 6 1/08/05 3 :00 0.399 6.43 5 3.00 0.667
0.399 5 1/16/06 23:00 0.230 5.46 6 2.00 0.500
0.530 3 11/24/06 8:00 0.163 5.18 7 1.30 0.231
2.67 1 1/09/08 10:00 0.141 3 .90 8 1.10 0.091
Computed Peaks 2.01 9.31 50.00 0.980
Flow Duration from Time Series File:rdout.tsf
Cutoff Count Frequency CDF Exceedence_Probability
CFS % % �
0.010 28792 46.954 46.954 53 .046 0.530E+00
0.028 6423 10.475 57.428 42 .572 0.426E+00
0.047 5623 9.170 66.598 33 .402 0.334E+00
0.066 5814 9.481 76.080 23.920 0.239E+00
0.085 4745 7.738 83.81B 16.182 0.162E+00
0.104 4051 6.606 90.424 9.576 0.958E-01
0. 123 2161 3.524 93.948 6.052 0.605E-01
0. 142 1600 2.609 96.557 3 .443 0.344E-01
0.161 1408 2.296 98.854 1.146 0.115E-01
0.180 311 0.507 99.361 0.639 0.639E-02
0. 199 27 0.044 99.405 0.595 0.595E-02
0.217 15 0.024 99.429 0.571 0.571E-02
0.236 17 0.028 99.457 0.543 0.543E-02
0.255 6 0.010 99.467 0.533 0.533E-02
0.274 23 0.038 99.504 0.496 0.496E-02
0.293 35 0.057 99.561 0.439 0.439E-02
0.312 29 0.047 99.609 0.391 0.391E-02
0.331 32 0.052 99.661 0.339 0.339E-02
0.350 22 0.036 99.697 0.303 0.303E-02
0.369 19 0.031 99.728 0.272 0.272E-02
0.388 25 0.041 99.768 0.232 0.232E-02 ,
0.406 26 0.042 99.611 0.189 0.189E-02
0.425 10 0.016 94.627 0.173 0.173E-02 '
0.444 14 0.023 99.650 �.150 0.150E-02 '
0.463 11 0.018 99.868 0.132 0.132E-02
0.482 14 0.023 99.891 0.109 0.109E-02 '
0.501 12 0.020 99.910 0.09� 0.697E-03
0.520 16 0.026 99.936 0.064 0.636E-03
0.539 12 0.020 99.956 0.044 0.440E-03
0.558 9 0.015 99.971 0.029 0.294E-03
0.577 4 0.007 99.977 0.023 0.228E-03
0.595 6 0.010 99.987 0.013 0.130E-03
0.614 6 0.010 99.997 0.003 0.326E-04
0.633 1 0.002 99.998 0.002 0.163E-04
0.652 0 0.000 99.998 0.002 0.163E-04
0.671 0 0.000 99.998 0.002 0.163E-04
Discharge Volume
Discharge Volume from Time Series
rdout.tsf ',
between 10/O1/00 00:00 and 09/30/OS 23:59 II
8581355. Cu-Ft or 197 .001 Ac-Ft in 2920.0 days I
PEAKS Cedar River Corporate Park
�� r,,;:� � �. •^.:�it�"d ,,>. ,;.,... , .,,.k, � „-7'7c� o a.: •:Y� ;r�: k f— * , "y "�'.' ;w�r.� y
„ . .; ; _: �.-, . ;, _.
�»
�. '�` �'`�" �.
Return Period
2 5 10 20 50 100
10� o rdout.pks in Sea-Tac
� exis?pks
�
0
10
,-, R E
� � �, . a a
� `-' G
d ♦
FF �
L' �
�
V �
�� y 00
� 0 �.
� ��-i
�
4
� �,
♦
i
! 10
� 1 2 5 10 20 30 40 50 60 70 80 90 95 98 99 ;
Cumulative Probabitity
Reo�on caofure• �JS 14wn�F�dav.525�"J7 776:w x 76Er,
DURATION Cedar River Corporate Park
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Replon Caotwe. 7:2935om-Fidav.S.Si07,1265w x 7iUh
Excursion Cedar River Corporate Park
Facility Routing Complete
Peaks Calculation. .RiD Facility
Flow Frequency Analysis
Time Series File:rdout . tsf
Project Location:Sea-Tac
Duration Cornparison Anaylsis
Base File: exist. tsf
� Nev File: rdout.tsf
�Cutoff Units: Discharge in CFS
F -----Fraction of Time----- ---------Check of Tolerance-------
�� Cutoff Hase �ev %Change Probability Hase New %Change
; 0.165 � 0.45E-02 0.73E-02 -23.7 � 0.95E-02 0.1�65 0.163 -1.4
'r 0.�10 � O.C,3E-02 0.58E-�2 -8.8 � 0.63E-02 0.21� 0.182 -13. 6
' 0.255 � 0.50E-02 0.53E-02 7.6 � D.50E-02 0.255 0.274 7.3
� 0.3DD � �.37E-02 0.42E-D2 13.7 � D.37E-02 D.30D 0.320 6. 4
0.346 � D.28E-02 0.31E-02 4.2 � 0.28E-02 D.346 0.3�2 4.7
" 0.391 � 0.22E-02 0.23E-02 2.2 � 0.22E-02 0.341 0.392 0.2
1 0.436 � 0.15E-02 0.16E-02 6.7 � a.15E-02 0.436 0.449 2.9
9 0.481 � D.1DE-02 0.11E-02 8.1 � D.1DE-02 0.481 D.489 1.8
} �.526 � 0.62E-03 0.60E-03 -2.6 � 0.62E-D3 D.526 0.525 -0.3
Q.571 � 0.34E-03 0.24E-03 -28.6 � 0.34E-03 0.571 0.550 -3.7
0.616 � 0.21E-03 0.33E-04 -84.6 � 0.21E-03 0.616 0 . 578 -6.2
0.662 � 0.16E-03 0.16E-04 -90.0 � D.16E-03 0.662 0.588 -11.1
0.707 � 0.48E-09 D.00E+00 -100.D � 0.98E-04 0.707 0 . 6�5 -14.4
0.752 � Q .16E-�4 O. QOE+�O -100.Q � 0.16E-04 a.752 0 .671 -1Q.2
<Maximum positive excursion = 0. 023 cfs ( 9.2%)
'occurring at 0.244 cfs on the Hase Data:exist. tsf
�and at 0.267 cfs on the New Data:rdout.tsf
;'Maximum negative excursion = 0.121 cfs (-16.3i)
';occurring at 0.792 cfs on the Base Data:Exist . tsf
and at 0 . 621 cfs on the New Data:rdout. tsf
P.enion Caufwe. 1:2b:30nrn-Fridav.5/15iD7.6Z7w x SaBh
CEDAR RIVER STAGE STORAGE -SPLIT FLOW DETI
Orf 1 (23%) Otf 2(23%) Orf 1 (77%) Orf 2(77%) Orf 1 (23%) Orf 2(23%
Sta e ft Elevation Stora e cf Head (ft) Head (ft) Head (ft) Head(ft) Q(cfs) Q(cfs)
� � ' �- - --- -- - -- --------t
---:'----- ---- --_ ___- '
'.,-- _ _ - -- ------
> 0.00 , 14.00:. � 0 OQ = ; 0.00 ' 0 00 1 0.00 0.00 0.00000 0.00000
-�- -� - --- -- -------- -- -
;_ 0_44__�__9 4 44 _: 7792.40_�j _ 0.44 0.00 i 0.44 0.00 0.00450 0.00000
-- - - -- --, - -- ---
A 0J5 � ` 14 75 i 13282.50� 0.75 0.00 � 0.75 0.00 0.00587 0.00000
__ _ __ -- - --- --- -
--- ----
��� 18772.60 : 1.06 0.00 j 1.06 0.00 0.00698 0.00000
: 1.06 15.06� '
= _. _:. __ _ - - - - -- --- --
-------
1 52 15 52 26919 2Q. . 1.52 0.00 ' 1.52 0.00 0.00836 , 0.00000
- --- -- -T -- --- - _-- -- - - --�---- - --
---- ----
1.83 15 83 ! 32409 30` 1.83 0.00 j _1.83 ` 0.00 �_0.00917 i 0.00000
2:14 16 14 F 37899.40 _ 2.14___ __ _ 0.00 � _ 2.14 __�_ 0.00 i_ 0.00992 0 OQ000
--- - -- -- - - - } -
2.45 16 45 � 43389 5Q 2.45 0.00 I 2.45 0.00 � 0.01061 I 0.00000
-- _-__ ___ ._. -- -- � - ---
2.76 � 16 76 48879 6Q: 2.76 0.00 2.76 0.00 0.01126 �.00000
--� ___ � - _- _ _ - ---_--1-_--� _ -_-
3 22 17 22 57026.20 ' I 3.22 0.00 3.22 0.00 � 0.01216 0.00000
-- -- - -- - - - - - -- - -- --
3.53 `17 53 62516.30 � 3.53 0.00 3.53 ! 0.00 � 0.01274 i 0.00000
- --- --- - --
- -
- ------ -
- - -�-- -- --0.01328 -I 0.00000
3 84 17 84 68006.40 3.84 0.00 _ _ ___ 3.84 0.00
_ --- -- - --
� 4 15 "'{8.15 73496_50 4.15 O.d0 4.15 I 0.00
! 0.01381 0.00000
- - -- - - -- - --- _ _ _- -
--- - --
4 61 18.61 81643.10' 4.61 0.00 4.61 �__ 0 00 0.01455 � 0 00000
- -- - - --- - - - -- - --- - ---
5 Q7 � -19.07 , 89789.70 5.07 0.00 5.07 0 00 0.01526 0 00000
- --- r---- - --- - ---- - -- - _ -- --- --
5.30 19 30 ' 93863.OQ 5.30 0.00 5.30 � 0.00 0.01561 ` 0 00000
-- � --- ; - . -- - ---T---- � - - --- --- -
: 5.68 � 19 68 100592_80 : 5.68 _� 0.38 �_ 5.68 r_ 0.38 0.01616 0 03661
- - --- -- --
6.15 � 20 15 1 Q8916.50 .: � 6.15 _i 0.85 _ 6.15 ' 0.85 0.01681 � 0 05476
- - -- - -- - -- -- --- ---
- -l-- -
6.76 ' 20 76 ' 119719 60 6.76 � 46 6.76 1.46 0 01762 0 07176
, ...- - - - - -- ---� � -- - - �-- -- - --- - - - -T-
_ -___'
'_.. � '__._
7.07 21 07 � 125209 70 ' 7.07 1 77 7.07 1.77 0 01802 ! 0 07902
-- 7.84 --21.84 _ 138846.40 7.84 � 2.64 - -- 7.84�- -- -- -- -
_ _ 2 08 0 01842 0 08566
-- _--� - -- -- - ---
- - _ - --- - -
7.38 21 38 130699.80 7.38 2 08 7.38 i
_ _-
2.54 0.01898 0.09466
- --- -- ------- ---- 1- _ --- - _ - --- - ----
815 � 2215 144336.50 ' 8.15 i 2.85 '� 8.15 2.85 0.01935 � 0.10027
--- - �_-- ---1 ---- �- - --- --- -----�- - ---- -- --
8.61 _�_22 61 _ , 152483.10 ; 8.61 �_ 3.31 ; 8.61 ' 3.31 0.01989 0.10806
, -- -- -- -- --- -- - -- -- -
----- - --- 9.08 ' 3.78 -- I 9.08 3.78 0.02043 0 11547
9.10 4 __,_ �- - - - --- - F --- --- --- - - --- -- --
_ 9.08 23.Q8 � 160806.80
; 23.10 161161.00 ' 9.10 � 3.80 9.10 3.80 0.02045 0.11578
--- ------- --'-_ _ -- - ---- - - -- --
Input Data:
_ _ __
�-- -
iQ(23%)Orf 1 d�a � . � 0 5�inches
p r------- -} -- ----�
' ---- :inches ;
,Q(23/o)Orf Z d�a=� . - .
� _ _ _ f_ ____ ---;
�---
- ,
�Q(77%)Orf 1 dia -j 1 53�inches �'
�- J
--
!Q(77%a)Orf2 dia=1 ``� 2.33 inches
, --------- ---- --� - -._.
2nd Orifice for Control Structures North and South set ai";`' ':,' S.3 ft
I
Project C.�BO�Qr ^((/Gl' Project No. 2C/(_oL[L>. �� ❑Page of
Sub�ect��r,/.-Q G�V d� • O/.� Phone ❑Caiculations ��
�� ❑Fax �
WithlTo Fax# � �
❑Memorandum
Address #Faxed Pages � �
❑Meeting Minutes �
Date /'/Lt�'/�� 2.� �� By , ��i ❑Telephone Memo
�— Civil Engineers
r � �U � /�� Q Structural Engineers
�yi(J�� O'� (,(�G/�`. � ' LandscapeArchitects
� �. Q`� /�,z� N a�s�� -� 2,� � ' Communiry Planners
� � -a
Land Surveyors
lJ( �pp ' �LA r` r!OW ��,/� /w y�` �O/`'/�1 Neighbors
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, ❑TACOMA
2215 N.30th St.
Suite 300
Tacoma,WA
98403-3305
253.383.2422
253.383.2572 FAX
_ � �SEATTLE
1200 6th Avenue
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98101-3123
If this does not meet with your understanding,please contact us in writing within seven days.THANK YOU. z06.267.2425
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sEc�rloN s.3 �LTEh�rlo�F,�ciL►T1F.s
5.3.1.2 METHODS OF ANALI'SIS
Detention Volume and Outflow
The volume and outflo��design for detention ponds shall be in accordance�vith the performance
requirements in Chapter 1 and the hydrologic analysis and design methods in Chapter 3. Restrictor orifice I
structure design shall comply with Section 5.3.4(p_ 5-38). Note: The desian water surface elevation is
the highest elevation that occu�s in order to meet the required ozrt�low performance for the pond
Detention Ponds in infiltrative Soils �,
Detention ponds may occasionally be sited ou till soils that otherwise meet the basic criteria of"suffcient I
permeab►e soil"for a properl_y functioning infiltration system(see Section 5.4.1,p. 5-57). These detention �
ponds have a surface discharge and may also utilize infiltration as a second pond outflow. Detention ponds
sized with infiltration as a second outflow must meet all tl�e requirements of Section 5.4 for infiltration '
ponds,including a soils report,performance testing,groundwater protection,presettling,and construction �
techniques. '
Emergency Overflow Spillway Capacity
The emergency overflow spillway weir section shall be designed to pass the l 00-year runoff event for
developed conditions assuming a broad-crested weir. The broad-crested weir equation far the spillway
section in Figure 5.�1.E,for exainple;would be:
, sn
i�z 3rz
(���oo — C��'8) L`l�LH -�8ris �Tan 4)H ] �5-1)
�vtiere Q,po = peak flo�v for the 100-year runoff event(fps)
C = discharge coefficient(0.6)
�} = gra��ity(32.2 ft/sec-)
L = len�th of weir(ft)
H = heigl�t of water over weir(ft)
F� = angle of side slopes
Assuming C=0.6 and Tan 6=3 (for 3:1 slopes},the equation becomes:
,
O,o� = 3.2] (LH3i + 2.4 H� ) (5-?)
To find �vidth L for the weir section,the equation is rearranged to use the computed Q�oo and trial��alues
of H(0.3 feet nliniinuml:
L = [Q,o�i(1.�1 H���)] -2.4 H or 6 feet nunimum �5-')
FIGURE 5.3.1.E �'VEIR SFCTION FOR EA�IERGF.NCY OVERFLOW SPILLWAY
emergency overflow overflow
i'��''';;� �.3'min.
��``��``��� water surface �� water
O.S'min. 3 = 3 surface
8 � = 1 0.2'min. H�
\per Table 4.4.1 A
I• � -I
�
1i24i200� 2005 Surface�Vater Design Manual
5-30