HomeMy WebLinkAboutSWP272913 ERRICO SHORT
PLAT
Level One
Downstream Analysis
January 29, 2001
Owner/Developer:
Tom Wolter
Skyline Properties Inc.
606 - 120th Ave. NE, Suite D-204
Bellevue WA 98002
' Prepared by:
Robert Stewart
Reviewed by: � 1-
Jon W. Nelson, P.E.
\ 2U 84
'
PC o ETERSON ° � �CISTE�ONSULTING � '10NAL
EXPIRES: 11/10/
4030 LAKE WASHINGTON BLVD.NE,SUITE 200
KIRKLAND,WASHINGTON 98033
PCE Job No. Wolt-0001
TABLE OF CONTENTS
TASK 1: STUDY AREA DEFINITION&MAPS .......................................................... 1
UPSTREAM DRAINAGE ANALYSIS ...................................................................... 1
TASK2: RESOURCE REVIEW..................................................................................... 1
DRAINAGEBASINS................................................................................................. 1
COMMUNITYPLAN..........................................................................I...................... 1
BASIN RECONNAISSANCE SUMMARY REPORT ................................................4
LANDSLIDE HAZARD DRAINAGE AREAS...........................................................4
SENSITIVEAREA MAP FOLIO ...............................................................................4
SCSSOIL SURVEY...................................................................................................4
DRAINAGECOMPLAINTS ......................................................................................4
' TASK 3: FIELD OBSERVATIONS ...............................................................................6
TASK 4: DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS..8
BASIN "A" -DRAINAGE SYSTEM DESCRIPTION...........................:....................8
APPENDIX A
' King County Drainage Basins Map
King County Community Planning Areas
Sensitive Areas Maps (Landslide, Coal Mine, Seismic, Erosion, Streams, and Wetlands)
Drainage Basin Tables and Maps
APPENDIX B
Drainage Basin Tables and Map
i
Peterson Consulting Engineers Page i
Level 1 Off-Site Analysis for Errico short plat January 25, 2001
TASK 1: STUDY AREA DEFINITION & MAPS
The .61-acre site is located on the south side of NE 24th St, and east of Aberdeen AVE
NE, in the City of Renton, Washington. More generally, the site is located in the SE 1/4
and NE 1/4 of Section 5, Township 23 North, Range 5 East W.M., in King County,
Washington (see Figure 1-Vicinity Map).
The site is in the Cedar River Drainage Basin and East Lake Washington Sub-basin as
' defined in the King County Basin Reconnaissance Program Summary Volume I (see King
County Drainage Basins Map in Appendix "A"). The site will be treated as one basin,
identified as Basin "A" (see Figure 2-Basin Map).
' UPSTREAM DRAINAGE ANALYSIS
There are approximately .54 acres of runoff contributing to our site. This contributing
area is coming from the lots located to the east and southeast of the site.
TASK 2: RESOURCE REVIEW
Support documentation for the following items may be found in Appendix "A".
DRAINAGE BASINS
The site is located with in the Cedar River Basin and is in the East Lake Washington Sub-
basin (see King County Drainage Basin sheet in the Appendix "A").
1
COMMUNITY PLAN
The site is located in the Newcastle Community Planning Area (see Community Planning
Area sheet in Appendix "A").
' Peterson Consulting Engineers Page I
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VICINITY MAP
ERRICO SHORT PLAT
SEC. 5, TWP 23 N., RGE. 5 E., W.M.
s 4030 Lake Washington D WN. BY., DATE: JOB NO.
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BASIN MAP
ERR/CO SHORT PLAT
SEC. 5, TWP 23 N., RGE. 5 E., W.M.
D WN. BY: DATE.• JOB NO.
ETERSON 4030 Lake Washington
Blvd. N.E., Suite 200 BAD 1/25/01 WOL T-0001
CONSULTING Kirkland, WA98033
z� Tel (425) 827-5874 CHKD. BY: SCALE. FIGURE.•
Fax (425) 822-7216 RS N/A 2
i
Level 1 Off-Site Analysis for Errico short plat January 25, 2001
BASIN RECONNAISSANCE SUMMARY REPORT
i
The King County Basin Reconnaissance Summary does not include a basin report for the
East Lake Washington Sub-Basin, which is the location of the site.
LANDSLIDE HAZARD DRAINAGE AREAS
There are no landslide hazard areas near the project site (see Landslide Hazard Drainage
Areas Map in Appendix "A").
SENSITIVE AREA MAP FOLIO
The King County Sensitive Areas maps, dated December 1990, revealed that the site was
not located in any areas of concern, such as, wetlands, coal mine hazard areas, seismic
hazard areas, landslide hazard areas, and streams or 100-year floodplains (see Folio sheets
in Appendix "A").
SCS SOIL SURVEY
Soils on the site, per the SCS Soils map, consist mostly of Indianola loamy fine sand (1nC)
(see Figure 3-Soils Map).
DRAINAGE COMPLAINTS
There have been no reported drainage problems in this area.
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' Peterson Consulting Engineers Page 4
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q, AgB Alderwood gravelly sandy loam,0 to 6 percent slopes
rt AgC Alderwood gravelly sandy loom,6 to 15 percent slopes
a �•?' y .�� AgD Alderwood gravelly Bondy loom, 15 to 30 percent slopes } "
• AkF Alderwood and Kitsop soils,very steep -
AmB Arents,Alderwood material,0 to 6 percent slopes• ,, I 90
T r a AmC Arents,Alderwood material,6 to 15 percent slopes*
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— „�` .Q• BeD Beaus lte gravelly sandy loam, IS to 30 percent slopes k-�
BeF Beaus ite gravelly sandy loam,40 to 75 percent slopes
' may Ce Bin Bellingham silt loam
Br Briscot silt loam
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Bu Buckley silt loam
Cb Coastal Beaches
Ea Earlmont silt loam ,1 Ag •
Ed Edgewick fine sandy loom
EvB Everett gravelly sandy loam,0 to 5 percent slopes Cya
�"'•,`yy ..—�4 "�'• -fif!.. EvC Everett gravelly sandy loom,5 to 15 percent slopes V
^' EYD Everett gravelly sand loam, 15 to 30 percent s lopes d'•-s 9 Y Y
EwC Everett-Alderwood gravelly sandy looms,6 to 15 percent slopes 'y
InA Indianola loamy fine sand, 0 to 4 percent s lopes "e _
"5yi qgC InC Indianola loamy fine sand,4 to 15 percent slopes
InD Indianola loamy fine sand, 15 to 30 percent slopes• _ `0rl `1.'. ^
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SCS SOIL SURVEY MAP
' ERRICO SHORT PLAT
SEC. 5, T WP 23 N., RGE. 5 E., W.M.
D WN. BY: DATE: JOB NO.
4030 Lake Washington
ETERSON Blvd. N.E., suite 200 BMD 1125101 WOLT-0001
CONSULTING Kirkland, WA 98033
o Tel (425)827-5874 CHKD. BY. SCALE., FIGURE.,
a o Fax(425) 822-7216 RS N/A 3
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Level 1 Off-Site Analysis for Errico short plat January 25, 2001
TASK 3: FIELD OBSERVATIONS
A site visit was made on January 23, 2001, during a clear and sunny day. The site
' contains one single family residence and shed, with grass lawn surrounding the home and
shed. A gravel driveway serves as access to the buildings from 24`h St. The topography
of the site slopes to the west, (see Figure-4 USGS Map).
No visible downstream drainage problems were observed at the time of the field
observation.
Peterson Consulting Engineers Page 6
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USGS MAP
ERRICO SHORT PLAT
SEC. 5, TWP 23 N., RGE. 5 E., W.M.
D WN. B Y. DA TE: JOB NO.
ETERSON 4030 Lake Washington
Blvd. N.E.,Suite 200 BMD 1125101 WOL T-0001
CONSULTING Kirkland,WA 98033
Tel (425) 827-5874 CHKD. BY. SCALE: FIGURE.
o Fax(425) 822-7216 RS N/A 4
Level 1 Off-Site Analysis for Errico short plat January 25,2001
Y
TASK 4: DRAINAGE SYSTEM DESCRIPTION AND PROBLEM
DESCRIPTIONS
' Please see Figure 2, previously located in the report, for basin locations.
BASIN "A" - DRAINAGE SYSTEM DESCRIPTION (BEFORE
DEVELOPMENT)
Please reference the drainage system table and location map found in Appendix "A".
Drainage from Basin "A" sheet flows west to the edge of the property. Where it enters a
rcatch basin containing a 6 inch pipe. The catch basin appears to drain to the west through
a 6 inch pipe under neighboring lots to the east side of Aberdeen Ave N.E. Unable to find
' the end of the pipe, it is assumed it connects to the storm drainage system on Aberdeen
Ave N.E. Flow then enters Aberdeen Ave N.E. drainage system where new storm and
sewer construction is in progress (point B). The new construction will divert all the flow
to the north starting from the corner of 16th Street and Aberdeen. Flow will proceed to
the north on Aberdeen until reaching 24th Street. Once at 24th St, flow will then turn east
for approximately 250 feet (point Q. Flow is then diverted northerly under the Kennydale
Lions Park (point D) and continues in that drainage system until discharging into May
Creek.
No visible downstream drainage problems were observed at the time of the field
investigation.
Peterson Consulting Engineers Page 8
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OFF-SITE ANALYSIS DRAINAGE SYSTEM TABLE
SURFACE WATER DESIGN MANUAL, CORE REQUIREMENT#2
Basin: Cedar River Subbasin Name: East Lake Washington Subbasin Number: "A"
Symbol Drainage Drainage Slope Distance Existing Potential Observations of field
Component Type, Component from site Problems Problems inspector, resource
Name, and Size Description discharge reviewer, or resident
see map Type:sheet flow,swale, drainage basin,vegetation, % 'A ml= 1,320 ft. constrictions,under capacity,ponding, tributary area,likelihood of problem,
stream,channel,pipe,pond; cover,depth,type of sensitive overtopping,flooding,habitat or organism overflow pathways, potential impacts
Size:diameter,surface area area,volume destruction,scouring,bank sloughing,
sedimentation,incision other erosion
A Site Sheet flow 1% 0 None None No erosion exists.
B Aberdeen AVE Concentrated flow n/a 150 — 300 None None No erosion exists.
Catch Basin and
Drainage System
C 241h St NE Catch Concentrated flow n/a 300 — 550 None None No erosion exists.
Basin and Drainage
System
D Kennydale Lions Concentrated flow n/a 550 - 1100 None None No erosion exists.
Park Catch Basin
and Drainage
System
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1 CONSULTING
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4030 Lake Washington Blvd. N.E., Suite 200, Kirkland, WA 98033
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