HomeMy WebLinkAbout03383 - Technical Information Report - Construction Stormwater Pollution Prevention Plan M ■1 ��
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T A C O M A • S E A T T L E
Construction
Storm water Po//ution
Pre vention P/an
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
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PREP.�RED BY.•
� Charles "Ted" Hill, E.I.T.
Project Engineer
Matt Budsberg
�� Project Engineer
' REVI£WED BY.•
Connie Linden, P.E.
Project Manager
Paul B. McCormick, P.c. 5.E.
E C�°���
Principal �q �
MAR 0� �
March 2007 BUi�p�r��;��;
�IS�ON
Civrl Engineers • Structural Engrneers • Landscape Archrtects • Communrty Planners • Land Surveyors • Neighbors
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Construction
Storm wa ter Po//ution
Prevention P/an
�.� PREPARED fOR :
�, Tarragon, LLC
� � og� �, 1000 2"d Avenue, Suite 3200
� �� e � w -
4 o x S att e, A 98104 1074
R` / (Z06) 233-9600
.yJ� V ii �'l,
�a� Contact: Murphy McCullough
PROJECT.'
°b'°`� �'�' 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�� �"'�I�� E.I.T.
prepared by me or under my �
supervision and meets the standard of Project Engineer
care and expertise that is u5ual 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 BY.•
Connie Linden, P.E. '
Project Manager
Pau) B. McCormick, P.E., S.E.
Principal
March Z007 ,
TABLE OF CONTENTS
SECTION PAGE
1.0 Introduction.................................................................................................... 1
2.0 Project Description........................................................................................... 2
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............................................................................... 6
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......................................................................................12
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.� Conclusion .....................................................................................................16
APPENDICES
Appendix A 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 S 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 Krng County Sto�mwate�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
the selected General Contractor with the framework for reducing soil erosion and
minimizing pollutants in stormwater during construction of the Cedar River Corporate
Pa rk.
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 pr�visions 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 12.6 acres zoned light industrial. The site is located between SW 215`
Street and SW 23`d Street off of Lind Avenue in the City of Renton, King County,
Washington. Of the 12.6 acres, approximately 10.2 acres will be developed and the
remaining 2.4 acres are 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 initially 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 — Pr�posed Preload
Conditions.
In the developed conditions, all drainage will be collected and conveyed to a stormwater
pond via pipes and a pump system. 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 2"d 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 or 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
with snow, ice, or the ground is frozen); or
■ Construction is occurring during seasonal arid periods in arid areas and
semi-arid areas.
o A waiver of the inspection requirements is available until 1 month before
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 periods �f 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.
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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 215` Street and SW 23rd 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 215t 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 5 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.
5.0 CRITICAL AREAS
There are two wetlands on our parcel; to the north by approximately 1,080 feet of
Category Two (2) wetlands and SW 2151 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 16 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, 2006, 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-2. 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,
Washington, provided by the Natural Resource Conservation Service. Permeability of
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.
H.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 fo� 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-way 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 fo� 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, 24-hour storm event without an overflow situation.
8.4.1 Stabilize Soils
To prevent soil from the erosive forces of raindrops, flowing water, and wind,
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 I
exposed soils, and providing vegetation per the landscape plans. I
8.4.2 Structural BMPs �I
In conjunction 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 C123} 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.
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Excavated material shall be placed on the uphill side of trenches, consistent with space
and safety considerations.
The following BMPs will be implemented:
• Temporary and Permanent Seeding (BMP C120)
• Interceptor Swale (BMP C200)
• Check Dams (BMP C207)
• Plastic Covering (BMP C123) '
• Mulching (BMP C121)
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
landfill. 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
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ground or into stormwater runoff must be conducted using spill prevention measures, such
as drip pans. Contaminated surfaces shall be cleaned immediately following any discharge
or spill incident. Emergency repairs may be performed 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 corrjmonly 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.
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Table 8-1
- Potential Construction Site Stormwater Pollutants
Chemical/Physical �1�
Trade Name Material Description�l� Stormwater Pollutants
�_ 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
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
Antifreeze/coolant Clear green/yellow liquid Ethylene glycol, propylene
glycol, heavy metals (copper,
lead, zinc)
Erosion Solid Particles Soil, Sediment
�'� Data obtained from MSDS when available.
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8.9 Control Dewatering
Foundation, vault, 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 t� 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 f�rms 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.
12 OQ � O
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).
13 QQ � O
Table 9-1
Record of Stormwater Training
Name Company Date
14 OQ � Q
10.0 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 Contr�l 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 Contracto� 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 temp�rary 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.
11. 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 June 2007. Final construction activities are anticipated to
begin in ]une 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 CZ20)
15 QQ � 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
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.r� � <
/
� ��� �
� Charles "Ted" Hill, E.I.T.
Project Engineer
CTH/Isk
March 2007
K:\Prime�Yr_2006�206200 Cedar River\STORM\Report5�20070301_Rpt_CSWPPP_206200_wp.doc
20070301_Rpt_CSWPPP_206200.doc '
16 OQ � Q
APPENDIX A
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.,___"�_... .__.�. . —_ ... _...._..
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f
� 84�5 58 32-2-` ,s �.- ,: T :;. ..,. . _ .::.
; � i'.,.:.;� .. .�.�.,>�" . . eo r,A. : �' - so w fa; :,o .. � � =,.:go''"�°� a�i�ic� " �
.." �. ,o ..�, ,..-
, :.' : , .. , . .. ��� ..
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i D P `___ ..... . ��:. �.��-::� .�. .:� .�... _ _ _ W
, .- a_ . „ . .. .... .._ ""...- _- �.
' .-' ._ .-::.�.. . _" :.-..: -�,:-:- x-.... _�..:__'_ .. ..':�. -
� 16 0(a.vElR0.NY ::' ::Y� 1!b(N) L'PL�IY WAE � • � 16'0(N) ��-. •.. ... �= Q(R' = R1M�AND�..
.��ia ie � .�'Yr � � wfDrta rFsi � �: ,-'r-._ .:`� �rc-Pn�i.��.
pPEU�E ` E 2 C'.P N 12 �- � .,: .. .�...- . d L�� � �
� ..:_
MA�ER .� _ . _ ,._ ,' _ - � I . , ��-. -_
__
r
K� �,.�n,�---- � :
� :.i: •. � .�BME UIMJTV ........ . .. ��• f •< . . .._. �� �� PPES AIC UOMi Wltlttlt � - ..
,_
�',
\ ..
� '� .� �t- . ..
_ .�. . .... �.._ ...-- ... u . .. .. . � �.s ....
;� �
... . �.�•W _ _...__ ._. . .. .�
...�.__ .._.. ___" . _ �
- �£ ___... ____......- -. , . ...� .... ... �
..__._... . _ '__ .
�. __. . . _. __ ?
91 M01
iF
r � t12'Ou CYP -' :�✓bvc lYIM1qlA�dl►Lb �
3 12'WP QILKRT �IE�6.0' Q
�'
312'pA OIP ��' G
k II'WV CU�VFAT .�...�IE�E.Y ���D �
�� " 0 �°°' CEDAR RIVIER CORP. PARK j �
'i TACOMA - SEATTLE i ' R ¢
EXISTING CONDITIONS �
x��s�nn�sr�t s�:u soo,T�a,wn�oa zsa.�+s�,a � �
3is o�taanr nbn,e soun,s�w 3zo,s�.w��a zos2a�za2s ie i �
�
�
�
�
�
APPENDIX C
C-1 .............Proposed Preload Conditions
C-2 .............Developed Conditions
� �
� CEDAR RIVER CORPORATE PARK � � �- - vERT�ca� oaTUM iNav� ss� ,
1..' ClTY Oi F�N70N BASED ON CTY BENCHYARK+1160.�OUND ON BRAS$
i Sw i6tH 57' i �"� BUTTp1 M7M PUNCM pl CON(,'REIi POST NOHI.MDIT ppM1 0.3 f0p7 M h
'_...,L...<�......._�.. F�.
3 ?��'�-"'�'� � YpN11ENT Gl$E APPROKMAIELY 6 iFfT EAST OF IHE CONSTRUCTED
SW 1/4, SECTION 19, TOWNSHIP 23 NORTH, RANGE 5 EAST, W.M. ����' � ' CEMTE%ME 0�EAST VALLCY HN.}1NA'!AT THE NORTHERLY MARpN OF Mi
i CITY OF RENTON, KING COUNTY, WASHINCaTON �o � �rA�t�RVEu�t mc�+T-a-wnr.
� ' , � ;�e� � corr�sa+v�cro�rxa��cro zv ro Naw ea is+3.�'
� � I � I I j � I � N�, �� ��
i � -_-sw ieri�sT
� HORIZONTAL DATUM
�AHBL�' �', � I �� ` � '� v�r�caro oc suRv�r rs�coaanc no 950J779p03.BASED ON FWND
Id � ` � �-� � I I I I I � ���. YpNYENTS IN SM 23RD SIREET.BEAftlNG NOR7H B9'S1'S8'MEST
��� -_ s;� i I � i � � I � �
, �
N ' - '� •'� =
>'" .. ' ��
� ' - _ -
_�� ��:- - -- - - -I L_ _ _� r � ;� E L _ ,� � �
�� ��a�! � , si T CONSTRUCTION SE�UENCE
E � �
�, _ -
' � � : ` - - - - - -- - - - - �� y � i. umu�a u+o�rhrm vr�-ca+smucna�weEnHc wn�an o�ReNta+.
��w ,
_ � .y��'
Y 1" � � - . :: ._��� _ _-_�'�.�'�. a . . . �!�� i ` sw _yn�_sT;...r_'. __ --�__-_.� ONNER,NID GIGlrEER.
� GRAPHIC SCALE I� i' � � _ - _ : - ` � - - �
Q i ��: I '_' _ € _ ,�„��-1 a� 1 , s. ruc a+�r�c�,vaNc uwin.
wo o s .m ao �..�1` 'f -- � ,.�__ F _ � �
�' � �.i 11;� y -' �_ - ��. � � �� , 3. POST NO11f,E OF CONS7RUC7qX ACIINIY 4p1 M71H NAME AND PHOfE
� I � a�, z;:?��� � � : ; � �-_�.--�,n� ------� � � � VI C I N I TY M A P ��a���R�� ;
� �-� 4 , � t , - � c �+sr�u am�e�vaohcna��s r�ai�n.
� moe - ioo n ..._ � �'" _. - i 1
o , �� �- � ; , _ a :, ,J . ' I_� LEGAL DESCRIPTION 5 ��,�o Nn,���n�a,�«�s>.
� i :''� � ' � ��� �� � - - b:'�-1 �u a e�o a c s 2 M I D S.M I O L 0�27 A N C�B I N B L O C t(1.�LL N C.D.W l 4 J W S 6. NSTALL PQtMETER PROlEC710N(4LT fEM(��BRU9i BIJ�ER.ETCJ
����. � .i.I �� _ -��-�- , ->�_=.-`_c__ _�:._.� -��� 4 � pN90N N0.1�ACCORDING TO
w j . ...s �i � EARLINGTON GARDEN$�DpTION TO TF1E pTl'OF SEATR£.
i j 'p I THE PLA'7HEREOF RECORDED M VJLUYE 17 Cf PLI.7S,PAGE(S)74.IN KNG COUNTY. 7. CUIS1RlICT$EOMIENT VOIDS.
� i .-� i � �. � I WASMNGTOH' EXCEPT 1ME YEST 10 fEET 0�LOTS IS TO 28 NCLUSIyE.IN SAN)BIOCK S,
� �a���:�.:J � . . . PURPOSES BT OEFD RECORDED UHOER RFSCOfmFD pAXt�FIIF NUYBER 6391019�
� - � 8. CLfM AND I�RB 91E.
� �� -- '' _ � � �' s. c��u�o srnauff cansmucna+eonos I
Q ai `,�,� � � Toc�n+�x wn+n+E v�c�hn vaena a ww�n��souTM�csT(e�n+�wuE
EH
� �I n � . ! � � I ' SOU1N)LYRIG SOUIH OF 71E SOUTHERLY 11NE OF Sp11T1Nf5T 21ST SIREFT MD NORTH OF
` �.
5 ; A, •. . ,. ' s/�_ 10. CONS7RUCT SURFhCF MA7ER CON1ROl$(MI7ERCEPTOR OINES.SEDMEXT VOND,
s� � p - � . THE NOR7HEALT 11NE Oi SOU7HNEST 2JRD S7REET�MO
UJ •,.• "I> I .•. : -�� -... - � -- : - �i ETC. 9MUlTANE0U4Y MI7H CLENtING MD CRi101NC FOR PROJECi
__. . . _
U '.. .... �L� -• . - � � .. . �.- :::�_�- i: � ` - i ER MTH THE V Pp2T10N OF TAYLCH AYENUE$OUhi ST(1 T A E OEVELOPMEXT.)
t I 01�7H ACAIED NE 9 S VEIIU
��••,,•• I�i� ,..k i ,i ��Y� I; t l. � '�.;1 '�� $pJiH)HANNG A YAD1H OF 60 fFET.MOftE OR LESS.LYTIG SOU7H Cf 71E SOUIHEALY 11. MANTAN EIt04p1 CONIROL 4EASURES M ACCORDlJICE M7H qTY OF RENTON
� y I PoCHT-qF-WAY NARpN OF SOUIHNEST 21ST S7REET IX7EMDED.MID NOR1H OF iVE STAIDARDS MD MAMIFACIURER'S RECpA1ENDAlIpIS
{ ����"-r �i��ro NOR7IERLY PopIT-OF-NAY NARpN OF SOU7HNESi 23R0 S1RET E%7ENDED Afq L1NG
1� 'I � i w f•.•',r I 12. RELOCAiE 9JRFACE NA7ER CONIR0.S AND ER090N CpITROL IEA9IRE$OR
i!� � � 7� �,� J� _ � e��a e�oa�s�µo x �ro
I I� „I __ - _- ... I NSTALL NEM 4EASUtES SO 7HAT h5 97E CONq110NS CNMICE.llf EROSION
, I� � � �l � � � _ �V-� , �� roc�n+ee wn+n�v�c�ho vaepan a soun+�sT z�rm stat�r(soun+ieoTM
_ ,_,_..�
a�- ,, � ` I � µo s�o��+r ca+ma is Krur�M�ccarmµc�w�TM n+E an a
. . �� � --..� � STREEn HANNG A MDTN OF JO FEET.tYMC ADJ�CENT TO 7VIE SOUh1ERlT LNE OF
r�� ��� . � . � - ._ -- � � �DC%S 2 NU 3�EAST Of JNE NES7FRLY 11E OF BLOQ(J.E7(TEIXIED SOUIHENLY�ANO RENTON ER090N AND SEq4ENT COJTROL STWIDN�S.
1" - --- ' �; �' " MEST TO THE�4S7ERLY UNE OF BIOG(t,IXIENDED SOU7HEFLY.
+ %' _ . r �- ��. � .
.��-,--�i� .r � __ ' � i � m� ,s. awa�a+we s�h.
I ..... " . .
�+��rE�r��ri .. �_�_ ( ~: .... 14. COYER ALL AREAS THAT MLL BE UNMOPo(EU Fqt MORE TNAN SEYEN DAYS
� �� ����'�-�� T-.-..-_ ��.__ _- ..� WHINC THE ORY SLASON OR TN'0 DAYS DURING 7FE IIET$EhSp1 NITH
s �.._ .. _. - .. .:.. ... - - ��5�-
I ->�.• �� �� : � ,...��..J _� � lY SEE ER090N CONTROI NOlES OH S1EFT Cl 2 9EF11NC OR EWNAI.EHT.
� � �
:::��,�t _ . . . �_ .. ..*�r..nu = - - _ _ � -__ � � .. - - _ _
�i,�- � u�,y cxaPxcc scn� -- YERTICAL DATUM INAVD 881 �
''- � � ° � �° q CEDAR RIVER CORPORATE PARK
1 I�` I � piY OF NENTON BkSED W CITY BENCFINARI(�1160.FOUND ON BNA55 I
i . . gUTTp1 MiH PUNCH OH CONCRETE POST►IONUMENT ppNl O.J F00T IN�.
� �i YONUIIENT CASE APPRWUI�TEIY 6 FEFT EAST Oc THE CONSTRIICTFD
� �, �R } SW 1/4, SECTION 19, TOWNSHIP 23 NORTH. RANGE 5 EAST� W.IVI. CE1�TQ3NE OF EA51 V/iLLFY MGHNAY AT THE NORTHEFtLY MMQN OF N!
�.
rf I?'JP ";' � ,,,cc- ac n ust-�sT vwor+e a�a+r-a-w�r
;.::�itt� 2,�R � .i _ _ _ _ CfTY OF REI�TON. II�N COUNTY, WASHINGTON e�vnna+. �e.e+
=a� -� � - - -- - - - - - - ' �
CON1EA9p1 FACTCXi fROM NGVD 29 T�NAVD BB IS+3.56'
; ;'� -� �� u ! � GENERAL NOTES LEGEND HORIZONTAL DATUM
� �. conm�croR mu�car+uc-unun�uRv�rats rn�a+�o corismucna+
� I_ - L- - " � s+u�
,'; F-+�---fr � - - - - - - - � TO LOCAIE V7IUTIES.WfV?ACT ENpNEER IF pl$CREPMlpES OR CONNC75 ������� PER RECORD 0�SUR4EY RECptqNG N0 950}179003,BASED ON FOUHD
�,� � ,,, . ... . • - , MTH PROPOSFD UTt1TIES. ____ MOMIMEN7$M SW 23RD STREET.BENiING NORTH 8951'S6�XEST
. a 1 I^ . `' . {V7�.q�7g '-T -� -TEMPORAFtY IN7FRCEPIOR$MALE e
����i�g�s3�€� � � f ; . .- - . .� _ .. - ; � -
{h' � � ounn�(rrp) � 2 caimm�croa sNui ron�aF u+o�n oasnac ununEs�oc�non, e
. •AHBL e .. j?r-WTINE(T'�Y) I . .� _,'��. ~--�•�- � � � - -....�:. .A _� ■ 92E.MID NVEIiT/CROMN E1fVA71(M1 ilS PEOIARFD TO CONSTRUCT � �-r FILTER FABRIC fENCT
�F n�. •. �i�i i� �/ 1/.f � i,'. � ,�':� l7?�"`�T"�� :i PROPOSED NPROYfMDlTS. e
• t fi�f t;lr j �� � , � .. ;�. � �� i /ff' FV7UIiE CURO fr�;r�, .. .1 � RIP-RM VAD 1.1
� � � {�� 3 i.� - l�;t)J. : .."" . Qfi:R1E(1YP.)` � �. CIfM NA GRUB 97E M7HIN QFNENC/M'OfM 1IM11S. CONIRACTQR SHALL
I. I i '. � - � �Ii � .�CldtdiC!KR!,,iA-S,r7; � r� �. . CROTECT IIfTLAIq)AREAS.INQUDfIG BIrtFER � CA7CHBASN SEDII�ENT PROTEC7NN e
EN
. � II �i�I�,���.. . .I� �� .. d . . ,J, �.., �`;�� i. CONIRACTOR SNNl PROIECT E70SitNC'AEIlANDS MID Y47lIND BUFFERS.
� � n:Fs;`' Y I ,�/10'� � NO MORK SHIiLL�DONE M7HN NEILMD AREAS.CONIRACTOR SHALL o
. � ; Mt0.ECT Bk?lC1NMK�l I I�,� � I�, '�_ i ��� V . ��--_..__.-�`��._ _ __.. - .. � ENSU7E ALL NECESSMY IEASIlRES ARE IN PIACE AID YANTANED TO CONSTRUC110N ENTRANCEe I
� N: 5519.52 I �: �p+ I. �.� ��1� 24 _�4 . ■ �S T CONSTRUCII(1N RUNO�T FRON ENIEILNC DE9CHI17ED 1�1UN0 �����
d E�. /9)124 I ��Sj t"j � o� � - -23 �� _ _ �
� �� � . . _..__ _ _ _ _ .�__.___ ___ _ � 5. PROVDE IIHE MASHNG AT CONSiRUCII(M EN7RNiCE IS NEEDED. �J�' DOSINC CRADES
O �R �i� ' I F � a� a°� coo�o 7RONDE3 W-R0.P P li (T'�P) 4 COM7RACTOR SYLLL$1EfP AID/OR CLEN!ROMW�Y AS REOVNEU. +
U T(N OF NE BASE BOIT I I I' 18 M.) � t _ oo�. o � - � � CRAYEL CHEq(DNA e
OF LUAWMY.ELEV.23111��� k .S3.tf�1R�D� � . . -._- 6. CON1PACTOR$IULL PROVqE MEASURES Fpt DUST CON7M)l, �
-` � �<a°�.' ...:,.
� _ I t ' _e_=�s' �y 1 CULYERT 003x -.� - ° � . �
v'�y�cce Il
W Y z� i �. ) � - / PROMDE iEP-RAPPFt) � ___. ' _. i.. -- -. T� ■ ). PRO�ADE INTEPoY CATCH BASIN PROIECiION AT ALL E105i1NG N!D NEIPLY j
> > ( )
� SsuF Rw 2"� � �E-2227 .,,,__ .-- - , ._:, p� _ ' .-■ INSTNIID CATCH BASNS. J��
, ' -'
, ! � : _ / �
� ��TP.Crtt� �5 I ,� � . ' / . , ' •._., I1 . .���..�- „'.- ,. ''` ,� ��' ."__� ] 8. CONIRACTOR SHALL PRONDE PREVEN7IVE IEASUFiES lU PRE�ENT � ADM7ER 51C� / �J6'
I � � �
� . . � 17�_�� 1 i I ' -- I ` fI1NRE G1R8 � Ul7REAlID RUIOF�AT$AMQITS FRQI ENTERNIG STORM SYSTEM AND � RE7REVAL$7RM
Q r . ' � wn�(m.� _�a�in�i�(Urw j G i r�iwos �
p �i�vn�s�ux � / �, ' . , � ' ; � r e 9h s��u ec a�u�n�v+o a�o rn,surs�ncf�ctr�na� �
v � �
W �1�� 01�"�f1MD) I '� I - � ' I f �� RE40VED REMNAHT TOPSpL N�Y RENAN PEP GED7EpiNICI1 67pNEER'S � �
U � ' Iry�; � _ . -�: I , � ! 4 � �NTURE�BULpNC �.i � � PR�BI��NB'B` ■V RECOMENDAl10N SpIS ExGv�7ED iROM 7HE IEYPOftARr SEDMIENT POND
__�� I Y�4 � �.��. ,f �J /t OU7lpE(7TP.) { ; �f�.�.Y6 � LOCA710N$HKl BE SPRE�D IN A TMN 11FT ACROSS 9TE PRIOR TO R.L , :� ��
-.. � 1� � Y (' _ � � PUCEMaT.SOLS SHALL�nLLm MO RECpPAChD TO A f�NµD �%� OVERRO'M :
i -..: � � �T,�� } I I ` � ! � !� � W STI�BLE CONp710N PPoOR TO FlLL PLACOIENT VEk GEO7ECNNIC�L (TO BWASS �
I �-'�� � � ; �_ � W E�+c�'s r�cauEr+o�na+ c�orocn� a�rx srarsuu
� � �� � FUNRE BU
I S�MH RIM 21.60 � -'�� � . � ��.� 1 � � �� � � � , fA�C i VQLUI�S�
�i IE 36'CP N ia 3 � .' � I . . I � • ' -- '- . W R 1 N E(T Y P� Z 1 0 Fl LL M A I E R I A L 4 1 A L L B E p 1�A M�.E T O F W R�D(C O N S Q J D A M M
i iE 36'i:P 5 tc. . ��I{ � y, �.- 'r . ---' � '� _" �_- .. .'_' ' - � V� PEW00 AS RECOYNENDED BY THE GEOTEpMCAI ENqNEER. 2�'
iklf I� I,I . -�� �.��� . . ___ - - ���_ .._.,_w
`^; I�I� - I :; .���� .. � ;,;��._ t'"�� . .__.. - ..__. .-.. "'_ _ -. . .__.� W fl. 9TEO�w pSP�N�MPROVED LceAI�IUI{ous DE6ms Fxow cAra BA4N
� iFi{ ni �� �� i ��!+ �� �� Y - �y /
I� 1 �^- ! ' , ^ . � 12. FllL A4PES SMNL BE 1.Sk1V 4A%M1M.TOE OF FlL SLOPE SHNl BE A . , ,
i : I I ,I '� I . � � � �� - �i � , . .
:� �����;��� ��('� -,<- � ' u �,rn)�i ``� , - � W �N�or s'Faou r�nr�o eu�. ; � , , , ',,.� , I
�. �I i �� � " i � � i � � � � Z �3003 SEDMENT ONLT � ��smw�+r�ccu�uuna+
;�� r �,, �. � = y .� KEY NOTES
��
E� "�-F' ��"� ' ' � vRo�c�ra+e�sr+5mwo+r rRohcna rn�
'M r t - ' � �� Qt COHSTRUCTION ENiRAHCEe l� fRON BOYHEAD MNIUGAC7UPoNG C0.
� � �.�. . � T. S7FtEAMWAf�BA9N INSERT 1
�, � 1 ` �i�PROiO� 'A �; �C� �
�'I I �iR J� P- - � , FF■ 52b '' Q e �se,�rnC w�"ac��Nwnr
��I �� �- � � , � ■H 2 c�ra+e�+smrp+T arohcna+ vtia+E i-aoo-�-�n
I� 4 ;;,
II .
CB RIu 2C.96,Y��{ k� ��� ;f , . � ;-�. ; `__ �_ `.-;� �xm+F�nc�c� � NLET PROTECTION NOTES� �.
iE B"PVC E 165 I � :�'r n:M 'a � ' 4. _ �. ... ---'- -.... --__ _.. _ _. QPROffCT IXISTNC CATCHBA9N.
� I� � e c c �=.e . � ( .. -_ .-- -- '-■ 1. fLTERS SHALL BE RENOVED PND 0.EANm Oft REPLACED AFTER
. ce aiu 20.25 I r� -'���<�1. ' .._E�v ���.. + (. ��Fl11UiE BU0.DRiG --. . -'_. ._.... - '-�, OS pppTECT E%STNG FlRE Htt1NANT/VALYE. EACH STORM EVENT.
!E 8'PVC N,B z . � ��E c�a . � . 6 CATCHBASIN SEDIMENT PROTECTION
iE e'PV�N t81 �� �' � I . ��i � _F. 7 (�� I f? !. . . , OPRO7ECT IXIS7NC MEMNDS MIO NETWID BUFfER$.$EE CEIFRAI NOIES. �
No a+Pe roun�To Ensi Ifi p /� NDT TO SCAIE
�. ({���YYPP��,::. y .-, l � � Q7 1EYPORAftY RlIERCEPTOR$YIME.
. �� I ..5�� ,'' � In " L-�� � ����e rC•' � B�ROIECT DOS7NG Fl�R OP11C NANFIOIE SFF(*NERAL NOTES 1 d 2.
� nI t���f �.-' �
�I ' ++gg�� i � n � � � i ��� ; Q9 PROIECT Q(51pC FlBER OV11C t1NE.gE GEIERAL NOTES 1 3 2.
!� 3 ;� �
�.i� i�: �Typ� 3 I� �''� � � �N F . � I �_I FUNRE BUIDNC� 10 PROTECT IXIS7NG hlECW4UNCAMN 4/V7Nq.E.SEE GENERK NOTES 1 k 2. GRAS$OR ROCK ,�,�i,!�.
� �� ' � . 1 � 11 (T1P� _: _ ��� . � -1 OUTl1HE(TYP_) �
i �
b � � " ;�� ,�_ � n IECT IXISiNG lE1EC0►�NUHiCAllpl L1NE.SiE GENERAL NOlES 1 3 2
�� , h . i ) ��` # .ts. ' �- --ti, ._ �__,=� ,\ i = o/\,,
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GRAPHIC scas.E LEGEND VERTICAL DATUM lNAYD 881 I
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YRIUNENi CASE A7GROX1Wl1ELY 6 FEET EAST Of 1FE CUlS1RUC7FD
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' i HORIZONTAL DATUM
PER RECORD DF SURYLT RECORqNC NO 9503t79001,BASED p1 FOUND
�� � �:-6"�x5 NOM110115 IN SM 2JRD S7�ET.BE�RING NORTH 8951'S8'MEST
� �� ' 6. � EROSION AND
/�/Y�ER�ABqIC Y�TERiAI 60'MJE ROl:S. q�y & � �� SEDIMENT CONTROL NOTES �
J USE SiMlES OA M1RE RiNCS TO AT7ACN '
/ F�BA�C'0 MRE � Y F I �
�z•B„-,.�.�qE I "� j _ _ + FPPROVAI OF 1H5 ERO$ION AND SEDIMENT CONTROL tsc vuN oocs Nor
� � �4BMiC bA EOlN1'. 3c] rtow � ',.�, u' '� 9ff5AN0�lOCAII�V OADS,PIPE�RESTRICTORS.p�lAµ11NELS.��NT(IpN..
Y ' �Ex���x�o o`sa li � � :
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?-�" I: �'% u�TEF�AI 14 8"BY 13'iRENCM � '^ I` J�B. I
Q I 2 1NE WPIEMENTAl10N OF 7F1ESE ESC PUNS AID 1HE CONS7RUC710N,
a 3'-0' . �,. , `��` v + 4AMiENANCE.REPLACEY0IT,AND LPCRADMC 0�iNESE ESC FAC0.171E5 5
� --- -- 1- I- 'I�-- 1HE RES7p+9BU7Y OF 1HE APRIGwt/ESC SUPERVISOR UNTR Nl
d z-e' -I- - �� �0:. CHECK DAAA CONSIRUCTpN IS APPRO\fD.
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O i �L � nn -s• 3. IF1E BOUlD11RIE5 OF iHE QEARNC LN17S 410M1 ON TH6 PLAl1 9W.L BE
CLFARLY MGCm BY A CONIINUWS LENCM OF$URVEY TA�E(OR FEHCINC,
V i � i REIXIRED)M2pR 10 CpISTRUCIIpI. WRNG 1HE CpIS1RUCTION PEPoOD.
NO p57lRBANCE BEYONO AiE CIFAPoNC UII�TS 41ALL BE PERYIT7ED. 1HE
� twSnHt cxan+o z�. CIEAPoNG LM7S SH�111 BE W4NTAINED BT THE APPlIGU1T SC SUPERVISOR
� � FOR 7FE DUNA710N OF CONS7RUC710N. �
W FILIER i�BFI�L�'ERiA_�. 6. (Y�Y BE P.C.M�CED TO SD'WM
� . �OF 4�F5 MTH LE55 TH4N 1 .
.cac x c�+vosm sd�-) 4. lliE ESC FAqU7ES 4i0MN ON h#5 PIAN MUST BE C9NS1RUCIED PPoOR TO
/� t'BY I"Cv+a Cw \ i
11 ' MPE��1C 6 EW�Y. � P�75'41l,
M 2'-0'
" � oR N cauur�cna Mn+�u a�aNcµo c��c so�s m asur�
Q rao"oc J/�- �3''y�SHED s-o• � � ROCK CHECK DAM ��mu+sva+�oF�R�r���wnmts,ataN�
Q GRAKL BAO(iN1 M`T�EN�N u1G y l�TME dSTMI�SUM TNAT GpNTS A t 9
dl BO'4 51DE5 OF RhF�ENCE �Z 15 1MH. .�F Oi EQI�I EiEVAl10N.' NT5
f�B�tC p+�YE SUk�4CE. ' 3
W �� - a'.«� ��-- S. 1FIE ESC F/Q]UlES SHONN ON TH5 PIAN ME 7HE NMMUM REWREtlENTS
(� i � Q � � B FOR I�HTIpPATED 4TE CONpMM15. WRNG 1HE COpS7RUC11011 PERIOD,
s•av+•w000 ve:r cbsnr�c ora.Ew�r J 1HEg ESC FACiJTES SHALL BE UP<,11ADE0 AS�EEDm FOR UEI�ECIED
K.. sicc�rcncc acs�s. RLM OP 91E ACSSS i ,� z STOR4 EVENTS MU MOqFlED TO ACCOUNT FOR CHINGNIC 41E CO�I7N1N5
rto.o I+ .�. -1 (E.G.,ADDI110NAL S1NIP PUAIFS,RF10CA110N Oi pTCHES N!D 9LT FENCES.
BRUSH BARRIER I ��f� ,
Ni5 P1[.y I
,,,s �'�' � 6. 1N ESC F�qJ71ES SnALL BE�EC7ED DNIi Br hIE MPt1Cu�T/ESC
S1IPERNSOR Mq NANTANED TO ENSURE OON71M1ED PROPER FUNCTIONNG.
NO7ES: SPACING BE'WEEN CHECK DAMS
wnrhH r�cams swi e��r o�r�oar r�v�ws ar n�t[sc
�. .on ycc.m.+on o.raiowc wsauwa raw. s. nrt�+c.a s ul ec e.arr.u�Mr�3,/�'Y�NYJ4 FApUIE$DURING TNE�ET$EASON(OCT.1 70 APRI y0)NIp Of MpiMY
�nr mw w vaio c�.ucrtx wwacu a��c..
z'-r aoc�c REMEMS p1FtIN('7HE ORY SEASON MAY 1 TO SEPT.30.
1 nrtlY SlR SIEEPMC55 PEPPQId[Ll��A f£ufE lM a �T_�fMPoC RWSS 9141 BE R[��40 M[M TICY
�� N.(SEI1�4D 111Fi:S[iLL>.IMI'pSE.BU�I10�BFfOR
5^ - +wt�vwroc.sc.��s aa.cm��.nc�nr s��auan. 7 AXY ARUS 0�E%POSCD SOILS,NQUDMG ROADM'AY EYB�M(AENTS.7HAT
a �++vw s�crr a o�ca,�o n�.o,-��sn�m nc m �iow z Ml1 NOT BE pSNRBED FOR TYIO DAYS DUPoNC THE NET SEASON OR SEVEN
f�Q p��pp ri_ l RR�fil9et f£rwl5 9uua B[MSMC'EO r4WAr 1. Ua�!"l0 9'Wa�Y+V�a�d'b rui la au�'aci�q oa �
rzw ua nus....io.r ic.s•ow•uAwc � DAYS WRMC 1FE ORY SEASON 4i/�L1 BE IYIEDIAIELY STA&JffD NITH iHE I,
. s m ae�ss o nrt sa.e.+�ar rs rn+e swad�us.rr�u.arr.ws swi se u+pe ano.n.ya�nbi.��n•rmu'n�or xe�eem�e ,
o,wnaFs v�uta n�u�n.c..s s-N+u.wu g�c he r�couwY FPPROVED ESC NE1FIODS(E.G..SEEDNG,MVLC1#NG.PLASIIC COYERMG. �
�on�.c cos v�o..w ec�w 1. �*e io7 m .,qm r.o�e.i..qm.�.e oa .o.r�c ETC.).
r.c sc.t sze TM.r eex a�+�c�sc c�...n�aa� . ,s�.e mc�e�dm�o�ot traaea��o�n.o�eiK ny�o�-wr
B. M!Y AREA NEEDING ESC MEAAIRES NOT REOIIfaNG iNNEDU�TE AT7ENTN7� �,
PLL7ER i/iBRfC f'�M�[pp7,uL �ron.nr CON3fRUCT10N CM'fPANC6 ROCK CHECK DAM 9iALL BE AppRE55Fp NITIiN FF7EEN(t5)D�'�S. ��
N'S CH6CI(DIJL4 �
�oovrcn �� I � a,"�0,s�m„a, 9. hlE ESC fAdU71ES ON INACTIVE 91ES SFW!BE IN59ECTED AND NNXTNrED
•I�• u.oucpw a - •I�I� �m "'1° ��� � •w. A WNMUII OF ONCE A MONTH OR WI7HIN FORiY-EK?1T(19)HOUR$
'm'n„�a o.;�wiw FOLL0IMNC A ST(XtM EVFNT.
,wc wwe-eo��� SP VAGEBO68 a�-� �wuE:eoea So P�GE:BO6E DMC.N4ME 906' SP PAGE B06� 1D. AT NO 7�E SHNl NORE TMAN ONE(1)FOOT OF SEDIYENT BE N.LOMED TO I�,
� FILTER FABRIC FENCE Z CONSTRUCTION ENTRANCE .3 CHECK DAMS �w������+N p�AT�B�N ,���Tp'e��S�o��Y��
UIES 91�11 BE QUIED Mtqf7 TO VRVNC 711E C1fANNG OPERRTION
1�T TO SCALE NOT TO SCALE SHMl NOT RUSH SEpMENT-UDEII MA1FR INTp hE DOMlSTREAM SYSIDA
I�T TD SCALE 11 ST�BLIZED CONSIRUCTION EN7RANCES AND ROADS Si►LL BE INST�LLm AT
n+e e�a�xHc a coesrnucna+ero�NeTNr+m von me ou�ena�a
EROSION CONTROL THE PRO�CT. ADD17NXIIFL YE�SURES,A1CH IS WASH P�pS.YAY BE
REWRED TO ENSURE 7HAT N!PAYEO AREA$ARE KEPT qEAN FOR THE
'WET SEASON' REDUIREMENTS PLASTIC COVERING NOTES ITYDROSEEDING NOTES °�"n°"°"���T.
�. pNY pTE YATH ElfPOSED SOILS DI.RMIf TNE NET SEASON(OCTOBER 1 TO APRII 30)91N.L 1. MS11C 4�EE11NG$HALL HAVE A MNNU4 1HICKOES$pf 6 YIIS At0 91A11 MEET 1. HYDROSLEDNG SHAl1 BE PPPUm TO AOPES NpCATED ON LAfqSCAPE PIANS 12. AXY PERYMIENT ROW CONiR0.FAOUTY USED AS A 76PORARY SETiLING
� BE SUB.ECi TO ME�EpAI PRONSIONS BELOW 7HESE SPEpAL PROV15pN5 ME 7NE REOUREMENIS OF 1FE STAIE STNIDARD SPEqFKATlp1S SEC110N 9'11.5. BASN 4iN1 BE YODIFFD N11H 1NE NECESSARY EROSION CON7ROL ,...
� REQIIRED M ADpTlpl TO 1FiE STMqARD ESC COYFR MFASUNES.7NESE PRON40N5 2. HYDROSLEDNG 10 BE AS SPEqFIEC N LAIaSCIFE SPEGFICAMINS. MEASl1RES NID SHAl1 PftOYIDE ADEOUAIE SRXtAGE CAP�QTY. F TFE '.,
N0.UDE CDVERfIG NIY NE'�Y SEEDED ARFAS M7H YUlpl/IO IIOOIIIf'IWC AND$EEDNC 2. COYERINC SNALL BE IN57Nlm IUlD YNNTIAJED 71GH7LY M PLACE BY USHC FAql1TY I$TO FUNCiIpI ULT�AAIEIY A$AN INFL7RA71(►1$TS1FM,1F£
/6µlpi p$1UItQEp/�i[A A$Pp59BlE PPoOR 10 SEPTEYBER 23 IN OROER TO PRONDE WOBACS OR 71RE5 ON ROPES M1H A MAAAIM 10-F00T I,RD SPAQNC N ALL 3. APPUCATION TO BE 100 lB5/ACRE. 1ElIVOR�RY fAQl17Y GUST BE GRADED$0 R1A?7HE 80Tf0M NiD 4DE5 .
GRASS COYQt FOR 11E MEi SEASON. DREC110NS.Al1 SEIUIS 9iA11 ff TAPED OR NEICH7ED D01M1 FIAL LfNGTH MD ME AT LEAST hREE FEET ABOYE THE ip1Al GR�DE 0�PE PERNANENT
1HERE$HAII BE AT lFA$T A 12 RIGI OYERL/P Of ALL SENIS. 1. 500 LB$/A(7tE 10-20'20 FERRiM1ZER.2000 LBS�MXiE NULCH AMD 10 LBS�ACRE SOII FApUTY. �
1. 7HE�11011ED 71YE iMAT A q51RUBED hREA CIUI RENAN UNMORKED M7FIUIT C01ER STABIUZER TO BE APPUEO M7H SEED NX7URE. '
NEAp1RE5 IS REOUCm TO TMO(2}D�YS,RAIFEA 1MhN SEVEM(7)OA15. 3. CLEM%.AS71C COVEPING 91ALL BE INSiAU.ED NMEqAIELY ON AREAS S�m 13. NFERE$7RAM MULpi FOR TEYPp2ARY EROSION CONTR0.IS REWHW,IT
BEPNEEN NOYEIIBER 1 NID MAHCH 31 AND REMNN UNTIL VECETATIp!IS FRAIY 5. SEEO BEDS PUNTED fffi4EN YAY 1 ANp OC7�A Ji ItlLL REqARE IRRIGA710N At0 SHlJl BE APPIIm AT A 4NINUM 1HIC1(NESS OF 2 TO 3 YIClIES.
2. $1pQ(PryE$AIp$TE�q1T IV�RL 40PE$ARE TO BE PItOlEC7ED F UNMORKm ESTABU9ED. O1HER MAN7ENANCF AS NECESSARY TO FOSIEA NIp PRO7ECT llf ROOT S7RUCNRE.
fOR YORE 1NAN 12 HOURS. 14. PRIOR 70 71E BEGINIING Of THE 11ET SFASpI(OCT.i)�ALL DISNRBED
/. MEN iHE COYERNC IS USED ON UN-SEEDED AOPES.IT SHN.L BE I�PT MI RACE 6. (OR SEID BEDS PLANIED BETMEUI OC(02FR 31 Nq APRIL 30�ARNORNC OF 7HE ARE.15 AWL BE NENEMED 70 IDENIFY IIFMCH ONES CAN BE SEmED IN
}. �pVfR MATEFtlALS(PUS11C,YATIING,EiCJ SUF1QfNT TO COYER AU DtSTURBED 1M11L THE NEJ(T SEIDING PERI00. STED�Ml1 BE NEQSSARY.(EG_GEOTO(MES.JUTE MAT,QEFR PLASOC PREPARA1K11 fOR THE MN7ER RNNS. qS1URBm AREAS STIALL�SEFDm
MEAS SHAl1 8E$TOQ(PILfD ON 47E. C0�4.RNC.) MiNN QE NEE](OF 1HE BEq1MNG 0�THE 11ET SEASOfI. �9(ETCH MAP I
5. PLASTIC C0�4RNC 51EET SHALL ff&1RIED TMO fFFT AT 1HE Tf1P Of AOPES N OF 1F10�AREAS TO�SEEDED NID 7HOSE AREAS 1p RpINN UNCOV�RED '
�. /il1 ANE�S TH�7 ME 70 BE UNNOKKED WFaNC RE UET Sf/SON SHALL BE SEEDED OROER TO 7REOENT AIRFA(E NATER RON'BEtEAM 9iE£IS. 7. �FONE SEEDING.INSTALL�EDm$U3A(�RUNOFF C01l7R0.IEA4IRES SUGN AS 91ALL BE SIAMTIED TO 11iE QTY Oi RDITQI N�EC10R. 71E QTY Of �
M1HM 01�IYEEI(OF 1NE BEpMNNC OF 1HE MfT SEASpI. CRApENT 1ERRACES�MTERCEP7CIR DINES.SW�IES.lEV0.SVNEADERS NID SEUMEN7 RENTQN M�ECTOR CAX REOUIRE S�INC Oi AD0ITIONAL AREAS NI ORDEk �
6. PROPER N/JN7ENANCE INCIUDES REGULAR CFIECKS fOR Po�S PND D6100Cm ENDS. BA4N5. TO PROIECT SURFACE MA7ER5,ADJRCENT PR07ERTIES OR ORAINAGf
5. MLILH 6 REOURED TO PROTECT ALL SEEOED AREAS. FAQuIES. �,
8. iFE SEEpgm 5HN1 gE FlRN MiH A FARLY FlN[SURFACE,FOLLOYANC SURFACE �. Kc�p
� 6. Fl�TY(50)U1EM fEET 0�9LT fENCE IkID 7HE NECESSMY STN(ES)PER AQtE Of MULCHING NOTES ��a�.ff����RAIqNS Aptp$$Qp AT RIGHT hH0.E$TO 7FIE SLOPE. ��.V�4°����'l���i��
-�, p$IURBANCE WUS7 BE STOCKRLFD ON$ITE t 4U.CH MATEPoALS USED 4i0.LL BE HAY OR S1RAM,FND SHI�ll BE MPUm AT iHE 9. fER7l1ZQtS ARE 10 BE USED AC(�'ORDNC TO$UPPIJERS REC0I�ENDAlI0N5.N/OtINTS a
iDUST CONTROL RAIE OF 2 TONS/ACRE USED 910.�D BE WNMZED,ESPEClALLY ApJACFNT TO MATER BODES Atq�1LNqS. "t r;��� �i �!
I i DUST IS TO BE CONTROI1fD ON THE C9NSTRUCMIN 41E. 2. Ml1LC1ffS Rlk�BE PPPl1ED IM ALL AREAS MIH F.)�OSID SLOPES CREAIER IHAN 2:1.
I 3. MUICFNG SHNl BE USfD IMIIEpA7ElY AF1ER SEEDINC OR N ARFAS NHCM CANNOT � �e�n���
2. NAIER TRUL7(M7.L BE USED 7D CONTROL WST ON DRT/CRADED AREAS ONIY. BE SEEDED BECAUSE OF 7Ff SEJISON. ��ONIt�
3. NO 91E RUNOi7 IS 70 BF CENERAIED BY OrER USE OF NI�IERINC. �, µl AREAS NEmIING YULpi SHALL BE COVERED BY NOVEMBER 1. ��� C A L L T W O B US I N E S S CHETO CITY STAN pRDgNCE � e-a;ae
DAYS BEFORE YOU DI =�va�-
1. CONIROLLING WST ON PAYED RO�DN'ATS MLL BE DAE BY 7NE USE OF A SNEEPER �"•"-:'�- p,�, TF�BE DRANM08 ARE NOT TO BE eti nnre ^"xa.;a� '
N
lYI7H MATER',�1 SPRAYERS NO RUNOFF FRO4 SPRAYER$SNALL REACH 11E �'•;-x-:- "'°'•d
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T A C O M A � S E A T T L E oeoo �� i DATUM I p�a�ning/Buildfig/Public Worke oaPc. TESC&DEMOLITION ��.� i
7115 NMi Slh SrseC 9db J00.T�mro.WA B&03 ri93N MII rn � REYISION BY DATE . APPR ""� I �"""°"'�' I ! NOTES&DETAILS
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APPENDIX D
Soils Information
SOIL SURVEY OF KING COUNTYAREA, WASHINGTON
Cedar River Corporate Park
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�t$pA Na�aral Resources Web Soil Survcy I.l 12/l/2006
■� Conserva�ion Service Nation3l Coop2rative Soil Survey Pagc I of 3
SOIL SURVEY OF KING COUNTY AREA, WASHINGTON
Cedar River Cor orate Park
MAP LEGEND MAP INFORMATION
Soil Map Unrts
o c�c�e5 Source of Map: Natural Resources Conservation Service
0 DetailedCounties 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
=' `^'�'ef Soil Map Compilation Scale: 1:24000
— Hydrography
Oceans
A�A�A�A� Escarpment,bedrock
���,��•����•� Eswrpment,non-bedrock
�-^-'�^-^- Gulley
������������i�i Levee
Slope
v Blowout
� Borrow Pit
� Clay Spot
• Depression,closed
- Eroded Spot
j; Gravel Pit
Gravelly SDo�
� Gulley
/� Lava Flow
� Landfill Map comprised of aerial images photographed on these dates:
�. ru�arsn or swamp 7/10/1990; 7/18/1990
n Miscellaneous Water
� Rock Outcrop
+ SaGne 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
� stony sPoc ���— --� digitized probably differs from the background imagery displayed on these maps�
As a result. some minor shifting of map unit boundaries may be evident.
p Perenrnal Water
�J$�/� Naturol Resourcas �' Wet Spo� \\i h ti��i I �un i�� I I I.'_ I 'I W(�
�
CnncrnationSenier ti;i�n�n;il l��n�E+ci.i�nr�nil tiunr�� I'a�.r�0(3
Soil Survey of King County Area,Washington Cedar Rivcr Corporate Park
Map Unit Legend Summary �
Kiiig County Area. ��'ashington �
?�ta� l'�lit ti��mh�,l �1ap Unit Name _��r�< in .1(1► P�rr��:t��i�:1111
A�C Alder���ood�ravell�sandy loam, 6 161.1 7.9 �
to I S percent slopes �
_a�'L) :al�le-rw�oud �ra��eil�� san�1�� l��am. I� ?1.0 l.�
tu i0 perCcnt�lopes
BeC Beausite gravelly sandy loam,6 to 14?.I 7.2
15 percent slape5 �
B�[) li�ausitc tira���il�� :ancl� lu�un. l� tu �l.-1 ;.�
30 percent slo}���
InC Indianola loamv fine sand,4 to 15 1�.1 0.7
percent slopes
\�� ���,�h�r�s<i�t i��am �l.fi -l.0
�
Pu � Puget silty�clay loam , 137:6 ` �` E.7 �
.�...� .. �,.. _.._. � r�_ .,...t..... . �:�. �. . r ,. ..
P� Pu��allu}� tine ;and� loam �-.� � �
, x r:�r` � "�` U,'
Sk Seattle muck ��`� �_ �� 32.8 �� 1.6 �� � �
��i tinc�hnmi.h :i:t :��.:m 1 f,�-- �.�
�
Tu Tukwila muck 62.' 3.0
��r l_�rban l:u��i �-1�.� =(,.� I
W, � l�,rater � ?9.4 � � �� l.4 w} �:
_�,:.,. .� � _ - _.�. �.,...�� . f �� . , .
�Vo �'�oodincille silt loam 3163 15.�7
i
USDA Vatunl Resources �4'eb Soil Survey 1.1 12;1i2006
� conser.a�ion Ser.ice National Cooperative Soil Survey Page 3 of 3
. .._ ,._ ._,_ .. �i-_ ....:i� ... �_�:.- ..-.,.. __. -.._ _.� . ;_.,t. ._ . _ _1�._ _I _�1i'__ �_.. ___. ._�'� _._
:'_ci:�ity ot sectien _ . a6 Y:., .-.. 7 E. are a� :nucn i� wcodlaad, 65C fee� nerth ar.d 8GG feet wast of �h�
as 2C percer.t �?eep silty c=ay loams t!�at hace a very southeas� corner cf sec. 26, ^. �1 P1., R. 5 E.:
dark brc�c:r. su_face layer and a reddish-yello�.o to
ol�ve-yellow subscil. C1--C to 20 '_nche�, i>ery dark gray� (1CY'R 3/1'r loam; �__s
=e:r.:eabiliry is mo-9erate. P.ccts penetrate easily sar,d, dark gra•y i2.5Y 9i1; dry; riassive; sc'�,
to the bedreck. Rvaliable wGter capacity i� moderate. very friable, rc�sticky, nonplastic; few re--. ,
B.unoff is slow tc ;aedi,mi, a�d the erosior. hazara is neutral; clear, smoot'� boundary. 15 to 23 i=,-_:_ -
slight to moderate. thick.
Th_s Gvall soil is used fcr t�:nber and past�re. �2--?p to 25 '_nches, dark grayish-broxn ;�.SY 9/2i L_w:;
'i3��3L7111t}� unit IVe-2; woodland grcup 3d1. fine sand, gray ilQYR 5/11 dry; massi�e: scit,
very friable, rorsticky, nonp�astic; `ew roots.
val_ cracel�y -cam, 15 tc 25 percent slopes neutral; abr�zpt, wavp beunda=y. S to 9 incY.e<
�? .--This hilly scil is cr. upla�ds. ?reas th�ck.
__� irregular -�n shape ar.d range frem �D tc abo�t C3--25 to 3C _nches, very dark gray and �ark-gray =__"
acres ;n size. 3!1 and 9/_; fine sar.d, dark gr�y (lO1R 9i1; ,.__
�one mappeu a_eas are ap to 20 �ercent irciuded massive; soft, cery friable, r_onsticky,
-_ierwood gravel;y sand.✓ loam, ar_d some are up Lo 1�� nenp'_astic; few roots; reutral.; abrupt, wa•.�_�
rent Beausite craveily loaR.. cour,dar•y. 4 tc � inches tri�k.
R�r,of� is mediu_�, aad the eresicr, Y,azard is s=- _q--30 to 3& inche�, dark-gray I�DYR 4%lj =oamy fine �_.�-,
-_� gra�ish crowr. ,��YR. Si2) dry; ir.assive; so_t, . _
T!��s sc:l is csed fer tir.�b�r. Capabili�, friable, rons_�cky, nor.plastic; few roots; sligtt�;
__:�t `.Ie-2; woodland group 3d1. acid; acrnpt, wavy bcur.dary. 5 te 9 ��cties �hici:.
CS--3E to 6� inches, black t10YR ?!1? cravelly sand, -.�er_
.ri?-'_i gravelly loam, 9C� to 75 percen= s;cpes dark gray ilOYR. 3i1? d-;; single 4rain; loc=e,
--This s�il =s very steep an� mostly concex. nons�icky, ncnplastic; few rc�ts; r.e�t�a�. N;ar,,
areas ar� ir_egu�ar in shape an� ra�ge fro-� SC to _`eet Lhick.
-. _�t 300 acres ir, size. This soil is s'_milar to Ovall
_:relly loam, 0 to 15 percen. s=�pes, except tha� The C horizon ranqes fro�, .-ery d�Y:•: c-�y t_ 9a�'-: I
_=:.th to the uzderlyizq ar.desite averages 3D tc 4C� gray an^. grayisY, brcwr.. It is l�any fiae sa�d to _ir.e �a�� �'
__ �Yes. that is uc to 15 pe_cen: g=avel. A �ex layezs are n:�r�
Some areas �n the lower slopes are up to 15 pEr- than 15 percent aracel or cobblestones.
= .` included �icer wood gravell, saady _e3T; s��:e c.-,�,E n.apped areas are up to 15 percent inclusicns of
r._� cp to 15 peicezt Ovall so:ls that have slope� of RiverwasY.; scme are up to 2C percert Pilcnuck fine sa�:.
,->s thar. 9�� percent; and scme are ��o te 10 percent lo�n; ar.d scne are up to 1S percent Priscot, Fuyallcp,
- .��site cravelif sancy loam. ar.d Oridia soils.
�uneff is r��id to very rapi�, aad the erosi�r_ pArmeabilit� i= :apid. The effectice =cotina dept_� i_ �
=-.,rd is severe. oG i�c�es or mcre. A seasor.a_ h'_gh water table is at a
-t; s soii is used £cr timber. CapaciL`�y depth of � te 9 feet ir. places. A•.�'_lable water cap��,tJ
_. :"--_. .. _- -r:--� grccp 3d1. is low, and runeff is slow. Strea-n ocerflou is a severe
hazard. The hazard of erosioa and depositi�n by stre�r. '
overflow is moderate to severe.
`:lchuck Series This scil is Lsed fer timber ar.d past�are. Capabi:it,
unit �I_w-1; woedlaad group 2s1,
7t:e =lic:cck series is R.ade �� �f excessive:y
d=a_zed soils �t;at fer.ned in alluvi;u;� er. iew s:rew�:� vilc�uck fire sand; lcar� f,Pk) .--Tris r.early level
'er_aces, uader a cover ef :�ardwoods and cenifer�. soi_ is adjacent to stream�. It is in long, r.arrow areas
�,lepes a:e 0 to 2 perceat. The anzual precipitation i� trat range from 4 to about 150 acres in size. Tre sur�ac=
�5 ", 55 inches, �nd the mean annual air tes.perab�re is layer is fine sand, loam or saady loan trat is cery dark I
sbeut 50 F. The frest-free seasor. is :5C to 2C0 days. qrayisn brown tc very dark gray ar,d 9 �0 19 inches thick. I
Elevatien rar.ges fro:n 20 to 800 feet. This soil is used for timber anri pasture. Capabi L�y
Ir, a representative profile, layers cf very dark unit IVw-1: wccd:ar.c �roup 2s1. !
�ras, dark y^rayish-brown, aad car:{-gray fine sand and ',
loamy �ine sand extend to a deptr of aLout 38 i:che�. �,
3elca this is b'_ack aravelly �ar,d that extends to a � Ser:es
aep_h ;;f 60 inch�s or c�ore.
Filchuck soils are used _`er pasture and, to a TY.e Fuget series i� made cp of poorly drained soils
lir:_ted extent, for t:mber. that formed in allunii:.-n, under sedges ar,d grass, �n small
decressions of the river valleys. Slopes
P-�l�huck loam; f-�ne sand (?cj .--This nearly lecel
soil i� cn terraces ad�a�ent to �trean�.s. The areas are
lcr.c and narrow anw raage from � te s:ichtl•y m�re thar,
a.^r�. in size. c_- > �__ _=ss 'r�� 2 Fercc--.
�=_ - t'- - Pe_�en-. . -..__u�_ F_e�-,r_tac�� . __ _� t� _..��tic�; ets��-:�a, --ery _carse, prism�t_� .,�r�_t�i__,
55 inches, ar,d tt�.e mean ar,nual air temperatu:e is abeuc hard, firr�, =ticxy, plastic; few roots; medi��r
SC� F. The frost-free seascn is abc��t 190 days. acic; �lear, sn.00th boundary. 8 te 10 i�c:�es
Elevatior.s ra�ge fre�� 10 to 65G ieet. thick.
Ir. a represer.tat:ve prof_le, tY,e scil is domi- Cla--40 to 45 inc�es, greeaish-aray (SGY 5!1) silt. :_,_,
r.antly mottled dark grayish-brewr and gra;�ish-brcwn lo�r., light gray i5Y '/11 d_y; commcn, f�r.e,
silty clay loam to a deptF of abou� 4` inches. The promir,ent, strer.g-brown (7.5YR 5/6; mo���:e=;
aubstrat�.un is gray silts• clay t}:at extends =., a depth mass'_ve; hard, `irm, stic'r.y, plastic; medi_�.-
ef EC inches cr more. acid; c;eaz, snooth beunriary. 9 to 6 in��r-�
Puget soils are usea for rcw crops and past.:re. thick.
C2g--95 to 60 ir.ches, g:ay (5Y 5/1J silty clay, ___-.
Puget sil�y clay loam (Pu; .--Puget soils are in gray (�Y 7/lj dry; few, mediu.-n, prominer.t,
near=y round or eler,gated tra�ts trat ranae from 3 :o yel'owish-red (SY"R 9/8, 5!Ej cnottles, yellcki:-.
:_G acres in size. Slopes zre less than 1 p=rcen�. browa ("�OYR. `!8j dry; ar.d comcnon, med'_t:m,
Represen�atice profile of Fuget silty clay loa:n, in distinct, ligh� olive-brcwn i:2.5Y 5/41 mottles,
past'1re, 800 feet east of the wes: q�artez corner �f ligi:t yellowish browr. i2.5Y 6;4j dry; massive:
sec. 2?, T. �5 N., R. '7 �.. very hard, firm, sticky, plastic: medi,ur. acic.
"r.11--D to 1 ir.ch, ver•y dark grayish-crown ?2.5[ 3/2; The A her;zcn ranges from silty clay loam to s�lt
silt loam, arayish br�an 11QYR 5/2) dry; mod- loam. :he B horizon is dcminantly silty clay leari
erate, tY_in, platy structcre; hard, firm, st:atified with sil� loar.:, silty clay, ar.d fire san�.
sliahtl-y stic:+.y, slightly plastic, many roo=s; So;ne az=as mapped are uo to :0 pzrce:�t inclusie:= -f
medium acid; abrspt, smooth bouadary. '_ te 2 Woodinvi'�le and Sn�hemish soils.
ir,ches tnick. Permeab'lity is slow. The seascnal higr water table
Al2--1 to 7 inche�, dark grayish-bzowr. i2.5Y 9/2) sil[y is at or r.ear the surface. In drai�ed areas, roots
clar ioaic., l�:ght gray 'S`_' ,/2} dry; common, penetrate with difficulty to a depth ef 6�� inches or
:ine, pror�i�ent, dark-brown (?.SYR 4i�j mottles; more. In undrained areas the effecti�e rooting deptt. is
moderate, cery cearse, prisr..atic structure; restric�ed. Tne available water �apacity is hig�. :u.-�o"
hard, _'ir.n, sticky, Flast_c; many roots; medi�sn is siew to por.ded, and the erosion hazard is slight.
acid; clea_, smocth coun�ar,. 5 :c 7 inches Stream cverflow is a severe hazard.
thick. This soil is used `o- row crops and rast.�_e.
____—' to 1' inches, darY. grayish-brcwa (�.SY' 4i2;� sil�y Capab�lity 'znit _.Iw-2; woodland gro�z 3o:Z.
clay lcan;, light gra•y (2.5� %/2; flry; cocc�non,
r-,;i;un, prominent, stror,g-browr. 17.SYF. 5/6, SiB;�
-1es; moderace, medium, prisrnat:c structure; Puyallup SeriEs
. , f��rrt., sticY.y, plastic; -�ary rcots;
.,htly acid; clear, �moott beur,dary. 5 to 12 The Puya=lup series is made up c� �ell-araired s�ils
_tes �hick. that fcrs=d in alluvium, under grass, nardwoods, a�d
-- - _ �� 25 inche=, grayi�F.-crowr. {2.5Y 5;21 conifers. These soils are on the natural levees a�=acen�
ilty clay loam, liaht clive gray ;SY 6/2? dry; to streair.s in the river valleys. Slopes are 0 to �
:nan}�, med'_um, pros,inent, .e�loaish-red (�YR Sie, percer,t. ^he annual precipitatier. is 35 te o� in�he=, anJ
,;'8; mo�tles; stronq, very �_oarse, piisma�ic t:�e meaa annua'� air te�perature is abcut 50� F. '-^ae �
�zucture; cery hard, firm, sticky, plastic; frest-free season rar.ges from loG to 200 days. Ele.-at�c�
ommon roots; slightly acid; abrup�, sr.,00th rar.ges fran 20 to SCO feet.
oundary. 6 tc 12 i:,ches chick. Ir. a represer.tative profi�e, ver; dark gra•yishbrcw�
-_ ,—_= to :.6 1/2 iaches, dark-cray ;SY 9/1;� medi�r, sand, and dark grayish-bro�,.-n fiae sandy '_cam and very fine sandy
light grayish brcwn (�.SY 6/2) dry; feu, medium, loam. extend to a depth of abou: 34 inches. The
:rominent, yellowish-red ;SYR 5/8; metties; substratum, at a dep'h of 6C incY:es or more, i� very
s�ngle grGin; loose, r.er.sticky, nerplas=ic; few dark grayish-brohn, dark grayishbrown, ar.d cark-brcwr.
roois; siightly acid; abrupt, smooth bouadary. 1 r.,e3�cen �aad, ioamy sand, and sand.
=0 2 incnes thick. Puyallup seils are used nostly _`cr row crops ar.d
-_- --:.6 1!2 �0 31 inches, grayish-brcwn (2.`Y 5/2; �ilty pasture. :hey are amonc the soils t�at are weil suite3
lay loan., light ara•y ;5� '!2; dry; many, to farming. 0rbar, dei�elopment is occurr�ng in s�any
-�edium, prominer.t, yel".owish-brown �10�F. 3/a) areas.
-�ottles; m�derate, medium, a�cular blocky
�tructure; hard, fim, sticky, plastic; few Puvallup fine sandy loam (Pyj.--Tzis nearly le•rei
roots; med_:un acid; abr�pt, wavy boundary. 3 �c 6 soil is on r.atural levees in the vallev bottoms. Areas
i�ches ttick . are long ar.d narrow or somewhat rounded and
_- --'1 tc 4G inches, grayish-brown i2.5Y 5/Zj silty
lay '_oam, ligtt gray (5't 7!11 dry; co�ncn,
_�.,_ cr���.ir._,.-, .-�:��.o, �_.-�.�.ar�i�..-,F1����: �:��1'�.
� . , .-. _ , s�._ _,_.. -_._...._: . -- -. .
B�--7 tc �5 inches, dark crayish.-brcwr. i2.5'i �]i�2; s_lt
Eel�u �h_s is nla�k r�:c1:,- p�a� ac��at i� '_r.cnas cr��_}:. �.-.-
leam, gray'_sh browr. I�.SY Si2) �rl; massice; °�stratiur, is dark-gray loamy f:ne sand that extends r_
sliqar;y �ard, cerf friabie, sl�ghtly sticky, dep=h ef 60 inches or mo:e.
slightiy plastic; many roots; s.ed'_ur.� acid; clear, Snerom'_sh soi�s are used foi : . _�-�.e , ; _�___ , _:__.
smocth bocndarv. =E to 2J inches thick. hay.
B21a--25 te 90 inches, da_k grayish-b:cwn (2.SY 9/21 ___ ___
silt '_�am, ii ht brcwnish Snohomish silt lcam ;Sol ,
g g=�y i2.5Y 5i2; dry; in areas th�t are irregular ir =�.:F -... - : _
many, fine, cistinct, dark yellewish-biown 1CYR abcut 900 a�res ir. size.
9/S; mo_tles, faint light sellowish brown (�.SY Representative profile of Snohocnish s�lt leam, _n
5/4; dry; s.assive;,slightly nard, very fria�le, p�s`cre, 1,050 feet eas- and 500 feet south of tr.e
slightl� sti=ky, s_�g7tly plas��c; co_nmor, rect�; norttwest corner of sec. 29, T. 21 N., R. 4 E.:
:ned=u.-n a�=-:d; clear, wavy boundary. 13 to 18
ir.c:7e� �hick. �,p--O to 6 inches, very dark erayish-brown (1GYR � "
5��g--90 to 96 inches, very dark cray (Sy 3/1) loa.�ny silt lcam, liga` gzayish browr. {_OYR 6!2? dr,�; : .
sand, gray:sh brcwn (2.SY 5�'�; dry; comir.on, y. `
medit:m, disti�ct, dark ellowish-brown (lOYR 3/9? lne, disti�ct, yellcwis'�-brown (lOYR �/ol mett�e;,
metties; massive: seft, very friable, nonstick}�, �rcwnish yellew (1CYR 6r61 dry; moderate, fir.e,
nor,plas:ic; few roots; �lichtly acid; clear, •.:avy g�anu_ar structure; slightly :�ard, friabie,
bcundar•y. 3 tc 9 inches �hick. sL'gh�ly sti�ky, plastic; �any rcots; medi�.�m a__ ..
B23--46 to 6� inches, olive-gray (5] 9%2� sil� lcam and very abrupt, sn.eoth boundary. E to B inches thick.
"_r.e sa�dy lcar.,, lioht brcwnis:� gray (Z.SY 6i2; �1--6 to 11 inches, very dark grayish-crcwn (10'iR " .
dry; commen, medium, proR.iner.t, dark yellowish- silt lcam; moderote, fine, granuiar struct, : ,
browa (1CYR 4/9i mottles, yellowish brown (lOYR sli�l:tly hard, _riable, slightiy sticky,
5/6j and light yellowish b=own ;'_OYR o/9) dry; s._g?:tly p'_astic; many reots; r.e9ium acia:
massice; slic:�t�•_v nard, very friable, r.or.sticky, abr�pt, wavy boundarl-. 1 te 3 inches th;ck.
noaplastic; few roots; sligntly acid. �'-9--11 to 17 _nches, qrayisr-brown (2.SY' S/21 c1G, 1__-.,
_:ght gray (2.�Y �/2) 9ry; black (1GY?2 2ilj r.,�-i .
"'he A hori�or. ranges f=os. dark arayish brown to very Peat, very darx giay and dark gray ;lOYR 3!1 and -: _
dark grayisY. b_cwn. The P horizc� rarges `rem �ark grayish �ry; many, medium, prominen: s:ctt�es of reddls�
browr and :ark gra; tc very dark gray and olive gray, and brown and yellowish red (.,Y3 9/4 and Siol, cer.�on,
from silt loam tc cery fine sancy loar.. In p:aces it fir,e, prom�ner,t mottles of brcani=_h ye_low (104'F.
contalns t:�in lenses of fine sand, lcamy sand, and sar,dy �i6 and 6i8? drr; modera�e, medium, granuiar
loam.. The nuwer and prcmir.eace ef mott_es increase below structure; hard, fim, s�icky, plastic; fe:: rccts;
a depth of �0 inches. mediiun acid; abrupt, wavy wounda=y. 6 to 26 inc`�-.
Some areas are up to 15 per�ent inclus:ons ef a deep, t'�ick.
stra*'fied Edgewick sandy loatr:; some are up to E p�rcent IIOe--17 to 27 ir.ches, black f1GYR �!1'r moist, mucky pear,
the saady Pilchuck soils: and some are up to ` percent iery dark brown (lOYR 2/2) dry; massiee; :7ard, v=r.
the wet Bellingham., Seattle, ar,d Tukwila soils. riable, nensticky, ncnplas��c; few roots; - ___
Peimeabi-�itv is r.ioderate. The effective rooti:�c ��id; abrupt, wavy bou�dary. 10 to 25 i�c�.-
deptz is 6G _nches a�d more. ':'he seasonal high Mater thic;c.
tab�e is at a depth cf 2 �c 4 feet. The available water -IICp-2' to 60 inches, lean:y `_ir.e sard, dark gra;
capacity is high. Runeff is slow, ar.d the nazard of 4i�) mo�s.; aray ;5Y 5/1) dry; few, fine,
eresion is sl'_ght. Stream everflow is a r.�oderate hazard. distinct mottles cf lig�t brownish qray ;.
This seil is used for row crops ar.d pastcre. 6�2� dry; massire; sof" very fria5le, r.c_.-
Capabiiits unit IIu-"_; woodland group 201. sticky, nonplastic; few roots; med�tJn ac�a
The A horizon ranges fro:n cery dark gray_sh c� .... _
Srohon-sh Series dark brown. ;he B norizcn ranges from very dark gra,,sr.
- _ brown to gray a�d from. silt loan; to silty clar loa�r _-._,
The Sr,ohom'_sh series is mane �p cf poorly drained sc'_ls loamy sand. Depth tc layers of pea�y material ranges fic:
=hat fo�ec in a11u:�ium in �treair. valleys. Slopes are � 1� co 36 inc._e�. ?he peaty layers are black to reddisi:
to 2 percent. Annual precipitaticn is �5 �0 50 inches, black and are _D inche= or mcre �hick. Layers ef si1-:
ar.d the me�n annual air temperature is about 50� F. The clay loam to icair.y sard cccur within aad beiow the peat;
frost-free seasen rarces from 15� to 20G days. layers.
Elevat-�r. ranges from abcst sea level to 3G0 feet. Some areas are �� �� 2C pe_cent incl�ded woodir.,.i==�
In a representative �•ro�ile, �he surface layer soils; aad sor.ie are up to 5 percent Seattle, TL'KW113,
ann s�seil are ve_y dark cray s:7-brown ar,d arasish a�d Shaicar scils.
browz silt loam and clay loar.i about 17 inches ttick. pe�meabilit,� is mederate '_n the upper part of the
pref,':e ar.d mcderately rapid in the lower part. Th�re =.. _
seaso�al high wa�er ta�le at er r.ear th= surfa�e. Ir�
ir�:n=_a `.. _ , -�._ =fr�,,«_ � -_._. .r.a �e�'`i i� _
,._ , _ . -
;. -:-, , . . - —
- __ , ,: , _
_ _ _ _ , . _ . _ _ _ , ;a . ;:
«„��i�_ted. P.ra�_�__� ,.ater ,_-������; =s t:. . Bu:�c'T _ii; �_; ..�,.c.e=ate. .�t; _�a�se� r=�sn.atic
is slcw, and the erosie❑ hazard is slignt.yStrea�r: structure; slightly hard, .�ery friable, nonsti�-:, ,
c:•erFlcw i� a se�ere hazard. nonalastic; fe�a roots; •aery strongly acid. Se,:=� :,
Th:s soil is csed for row crop�, pasture, and Feet thick.
nay. Capability unit IIw-_; •aood�a�d gro��p ?w2.
The mineral layers aboce the r,iuck range frcm ver1 d_sr:
Lrowr. tc cery da_k czayish browr.. The '_ower part o: -_.
Snohor:ish Series, Thick S��`ace �ariant mireral la;er commonly ranges from �iight brow nish cr�f
to ver} dark brckn. Larers cf �.�ery fi�e sandy
Srohomish series, tnick surface variant, is r..ade up loam colcanic as:� o�mcaonly eccur _n the lewer half of th-•
, of somewhat 000rly draiZed scils that forned ir. a1?ucial mireral layer. The de�th to muck rar.ges from ZO to 90
�eposits cf diatemacecus materia� on t'�e `lood piaiz ef inc;es.
the Sammamish Valley. Slopes are G to � per�ent. The Soils ir.clu�ed with this soil in mappir.g make uc :._
arr.cal pre�'_pitaticr. '_s 45 to 50 inches, and �he mean ;nore than 25 �erc=n� of the total acreage. Some a_.__
ana�al air temperature is abou� SO F. The frost-f�ee are up te �5 percen� the ver•y deep Earlmont silt -G�T;
�easen is abcu* 200 days. Elevation ranges from about sea �nd sone are u� �0 15 percent the very deep Tukwi=a
. lecel tc S� feet. - muck..
In a represer.�atice profile, th= surface layer is very Per_neabi'ity is modera*e. There is a seaser,a_ �i �'- I
da_k brown silt lcarl about 1� inches thick. T�e r.ext �.�ater ta�1e at a de�th of 2 to 3 feet. Ia drained areas,
layers are very 3ar:< qrayish-brcw� and lightaray silt the ef`ective rooti�g cepth is 50 inches or more.
le� and very f�r.e sandy loam about 1� inches t;ic's, yvailab':e water capa�ity is high. P.unof£ is ver: �_r ,
�=__o•a this is b_ack nuck tnat eatends to a dep_h �f EC� ar.d the erosion hazard is slight. This soi'_ is s�_`_,,=~� -
�n-t_es or more. eccasio�al flooding.
7ese soils are used for row crops, hay, or pasture. This soil is used fcr row croFs, pas�ure, ar.�
ha..�. Capabiiit•y unit IIw-2; w�-.:l�n5 ___ �. v.-
r.�hemish silt loar�, thict sarface variant (Sr; .--
_.._� sc:l is nearly level. Areas are irreqular ir. shape
�._.. _ange f=o� 1 acre :o nearly 200 a�res in size. Sul*an Ser�e�
Repiesentative profile o` cclti,;ateri Sno:�omi�r s_�t
=_ar:, 8_0 feet nerth azd Z5G feet ea�t o` the wes� The Sultar. series is made up c' .___.-_�__-__ ..=_�
a_,=r cerr.er ef sec. 26, T. 26 N., R.. S �.. � G
d_ained so�ls that formed ir. allu�r_c.T„ ;c.�r _ �s ar�
hardwocds, ir, the major strea-n ce=leys. Slopes are C t:_
=.�---- - 10 inciie�, verr cark bzowr, (7.SYF. L/Lj Sllt � Vercent. T:�e annual precipitaticr, is 35 to SC in�hes,
ar�., aray_sn brown (lOYR �.'2j dri; weak, fine and the r.�ean annua'_ air temperature is ab�ut 50� F. Tt-�
zr�a coarse, crwnb s:ruc�ure; soft, very �riab_z, _'rest-free seasoa ranaes fron 15� to �CQ days.
r.sticky, s'icht�y plas�ic; commo� roots; ?levatior. rar,aes frer. abcut sea level tc 85 feet.
-_ghtly acid; abrupt, wacy bou;dary. 10 to 12 In a representatic�e profiie, the surfa�e layer is -:
_�._hes thick. dark grayis'�-browr. silt '_oam abcut 9 incres thick. T��
--1 1� inches, very dark gra,is:�-brown ;1D`iR �/2) st:bsoi: extends to a depth ef 60 inches er mere. I- :
d brc;.,r. ("�0`xR 5!il silt lc��, ligh� gray ( .SY mottle•3 yellowish-browa, light olivebrowa, gra}=:sh-�r._,::�.,
-1 ar}, f�w, fine, prominer.� (i0]R i6 and�6iBi and olive-cray, stratif�ed silty clay loam, sii� loa-�,
•_tles in root casts; modera�e, c-ery coarse, ver•y fir,e sandy loam, and medium sand.
ismatic structure; hard, friab':e, siigl:t_: Sui-an scils are csed for row crops and pasture. I!
- i�c}>, slight'_y plas:ic; c�m-n�r. roots; med'_u-r. I
, ,:: abr�n" wavy bocndary. 4 to 12 inches Suytan silt loam ;SuI .--This genti•y ❑ndulating sei] li
- -1=k. __ �n �ottom land. Slopes are less thar. 2 percent. �,r��. ,
___"--_ =0 20 inches, light-gray (lOYR 7i2) and �ark are irreaular ia sha�e aad rar.ge `_icm 2 to abo r_ 2���i I
__owis�-brcwr_ ("_OYR 9/9; :�ery fiae saady loam acres in size.
lcanic ash;, �,�hite (lOYR 8%1) and very �a�:e Representative profile o` Su'_�an silt loam, in
, __a:r. (1GYR �/9j dry; massive; slightly hard, pas�ure, SCO fee= east, 25C `eet e��t and 2c�i feet
___able, ronsticky, nonp=astic; common root=; �cr-h of the scu-r cua=ter corn�r _ s_�. _, _. �5 D:.,
__chtl•y -cid; abrup�, wa�y boundary. 3i4 incr �0 2 .1, g, ;
hes thick.
: ___—__ to 29 ir.ch2s, very dark gray;sn-brown Ap—p to 9 iaches, .e_}• vark qra;�'sh-�r�wr. ._Ci=. 3i=i
._'iR 3/�) and ligYt brownist•-cray i�-OYR. 6!�) silt �ilt =eGm, �:ght bro�.an_sY. ara•y ;iCiF. ei2i dry;
_ sm, light brounisY, gray (lUYR 6i2) and cery Fa'-e moderate, medium, cranular struc�ure; Y,�rd, firri, '
_. .:�r. (lOYR ?/4) dry: med�rate, ve�y coarse, sticxy, ana plastic; c�an, roo�s; slia:7tly acid; ''
cismatic structure thGt parts to very coarse platy abru ��i
p., smcc�h boundary• 6 to 10 inc:�es trick.
-_��ture; slightly :�ard, f-'_able, nonsticky, g?1--9 to 2i ir.ches, ye':lewish-brown '1CYP. Si9) s'_t,�
_lig7t_y plastic; few ioots; r..edi�ur. a�id; clear, clay loam, pale �ro�.va ;_OYR. F%3; dry; r.�oderate, I
s:no��t7 bcur_d��,. 9 ._._ 19 =rcres `i-ie, =c2,ar_eul�r bin,�k, s-ruc_Lre; I
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
i
�EPORT OF SUPPL�MEN;AL INVESTIGATION
' PRQPOSED [n'AREHOUSE/OFFICE $UILDIhG SITE
LIND AI�EPIUE , RENTON , �n1ASHIIVGTON
Apr-� 15 , 1985 -
_ _--__------ ---— -
- -_._. ___- -----�
� o
� ^ o
U �"����
o ' 11
� ATLAS GEOTECHNICAL ENGINEERING INC.
��
� o
� �� Q
' n ;;���� ,�TL�,S �EOTECI-INIGAL ENGINEERINC iNC.
� � ��1
� 13125 - 1i3TH PLACE N.E., KIRKLAND, 4VASi-11NGTON 98034 TEL. {206) 823-1030
April 15, 1985
'-i�t�a;^d and i'�lati•c F n Sae i-s g
30i), 1_2i)ch ;,ve,�ue �JE
S21 1"��tf2, 1�J1; 3oO0�
uen�lernen:
Repor� of Sup�ler�ei�tal I��vesti ga ti o�i -
Proposed Ev'ar-ehause/Office Buildiny Site
Lind Avenue, Renton, t��ashingtor�
INTP.ODUCTION:
This letter report sur,m�arizes the results of our geotechnical in��estiga-
�tion o; yourr propcsed warehouse and office building site on Lind Avenue in
�enton, I°lashington. Our �.Nork �uas undertaken in accordance with our confirma-
ti on of a�reement dated F1arch 25, 19�5 whi ch you confi rned i n our serv i ce
�yreernent on the 2i th of ��arch.
The site measures approximately 880' x 57_G'. Por�ions of the adjac2nt
streets rights of way to the south and east may .be added to the property which
�:;ould increas� its size somewhat. The property outline and the adjacent
streets are indicated on Plate 1, "Exploration Locations", attached to this
t,eport.
The site is a fi �lled former marsh land and is now nearly level with the
ex;;e�tion that some of the adjacent forr�er street rights of way are at lower
1 e ve 1 s. The si te i s now +iacant except that sonie trees and brush have grown up
over the si te. -
Tnere is a previous investigation of the site made by the undersigned and
summarized in a report dated f�iarch 15, 1968. The site was filled in 1968 for
�ase as a petroleum products tanl; farm. This filling was dane in accordance
��rith the recommendations of the investigation report, as confirmed by
engineering inspection and testing of the fill described in a report dated
Cctober 25, 1968,
The proposed construction consists of 4 "L" shaped steel frame buildings
�ti�ith lightweight wall paneling. Slab on grade floors would be used and the
floors would be supperted on a fil l approximately 2' above the site grade.
Shallow depressions would be provided adjacent to portions of the building to
allow truck dock height loading. The warehouses weuld have an approximately
24' interior clear height and an 80' clear span. At seme future date the
1
��i 1 d���gs ��Joul� �ae conve��'��c: For or i i ce use i;�� addZ E�g an i���ernal s�cor�d sto•��y
suppor�ted a�t �the exteri or� s�a 1 1 1 i ties and on i nteE-i ot� beari ng ti�a 1 1 s andi or�
r,olumns o Flevators +•dould be added ror access to �the secc��d �loo•r level.
Bui 1 d i��g co i�;mn� woul d be 1 oca ced about 25' on c��n�;�rs< Co i u;���i 1 c�ads
��r�ll h� abouc 2� ;cips d�ad T�;�td af�cl 25 �<ips ? i�re 1oad� I��t�rior and exter�or
yJ<�1 1 10�ds a�s'�r��� or Fi�� :.UII 1��.�'Sl Oi1 ;��o��?d a� aUout �!i00 5 us ��er� f�oi; d�.a�i 6 oad,
d'fl�� ���� ����5 �)'L-'V^ i�02: 11!!C ��Od�< G'�d'.''i�(1011Si'. S'l'.UY'dc�.�. �0:?i�S iy?"�_ E':i1.7Y^}i:i?.i ;:0 ?lOL
�>,c���`c� ;3bou c �!��U l b� �2t� sco r��o an� co�i��d�f��i ri� a� 51� s;»c2, ta a v�^�gF ;��� �
�aare �han :,.uf�ca� 'St) 3bs pc�r sq: ri;.
T�'l2 1`Of'171C�i^ tl'd�"Sil � di1C1 7klC� l!���.°Q St�Y'L �?Yli' CO�11Qi'��SS���� � peat 3i1t� Q7'�Ju�l'IC
s�ili denosi�ts ��� �i,o about 8' t��ick �eh�ich z,�er2 �a��d:�rlair; hy l;s� con�pre�sible
si 1 �ty sa��ds and s i 1 ts, The �najor co��cern oi �hi s invesiiga tion i s to �val ua�t�
�i�e thicl;ness an� c:ondiiion of �h��s� deposi�ts and to 2s'tinate se�ttl�i�ient and
differential 5ettlement behavio►• �that ���ould a�fecl �the ne�r construc�io�i.
I'�lVES�IGl�TIOt�:
Twelv2 test pits, lucated as shown on Pia�te 7, were excavated usiny a
1 arge tractor mounted backhoe. The test pi ts were dug to depths of up to 18'
and �ull: or disturbed sai�ples representatit�e oT the m�terials, particularly
tl�e ca:�pressi b 1 e �rateri a 1 s, �dere o�tai ned for inoi sture content determi nati ons
�o aid comparisons with the testing done in the previous investigation. A log
of the soi 1 s encountered was kept and i s presented in typewri tten form on !
�lates 2 thrcugh 10. �
One additional test pit s�as excavated near the south�astern corner of a
small parcei alsc under your ownership located just east of the northeastern
corner of the property. The 1 cg i s presented on P 1 ate 10,
initially a pattern of 14 test pit exploratiens, located a�ith respect to
the proposed buildings and their locations, was planned. Test pit excavations
do disturb the foundation soils, and there is a possibility of adding portions -
cf the adjacent street rights of way and relocating the buildings some�rha�t, or
of an al ternati ve bui 1 di ng arrangement. Tf�erefore, ��e were asked to 1 ocate the
test pits along the east-west center line of the site and along the north and
scuth property 1 i nes as far from the bui 1 di ngs as practi cal . The test pi t
locations were establ ished in the field with your assistance using a steel
�ape to estabiish distances eastward of the curb on Lind Avenue and along
alignments established using a level with a degree scale for turning angles.
The locations are shown on Plate 1.
We caution tha�t there are a number of a�ays in which errors can be made in
`ield locating test pits. Ir future construction is planned which approaches
the i ndi cated test pi t 1 ocaticns ali thi n 20' we recomnend that there be very
tf�orough probing and checking of building foundations to confirm that they are
not overl yi ng test pi ts.
�
COTJCL�SIONS A�vD RECOM��ENDATICh�S
GEtJERAL In nearly all of the test pits the fill appeared to consist oT
taro layers. The uppermost layer is a brown sandy and gravelly silt including
some rock fragments. The gravei is primarily ancular material and the fill
apparent: y was derived prir�cipal ly from stripping to expose rock in a rocic
quarry. F:ock up �to about ZOi) lbs in size was encountered in our test pits.
;one 1 arger •rocl<s are 1 i kel y. Loca 1 1 y the fi 1 1 i ncl udes a brown sand From an
un�:noivn source,
T�-�e 1 o��rer pertion of tne -�i I 1 i s �eneral ly bl ue or L1 ue-gray in col or and
ao;�ears to be from the sar.e source as the upper fiil except that the rock
content and -cfieir size is greater. The rock content increased with depth. In
t�,yo of the test �i ts the 1 ower� porti ons of the fi 1 1 consi sted al most enti rel y
of rocks, includine rocks of up to 800 lb, size with dimensions of 2 to Z 1/2
feet.
Totai fill thicknesses varied frc�rr 6 1/2' to 10 1/2' generally .�,eing the
�hinnest near the southern boundary oT 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 t�as been disturbed to depths of 6 to 12" as a result of traffic on the
site, weathering, and to some extent by the roots of veyetation that has
sprung up on the si te.
Beneath the fili there is a compressible former marsh deposit including
peat, silty peat, and interlayered peat and organic silt. The marsh deposits �I
vary from moderately 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 organic materia� towards the north. It appears that
�ri or to fi 1 1 i ng, the si te-was--higheY`-a l ong the southern boundary. The marsh
deposits are thinner there, and at some ti�e in the past they likely were
expcsed to drying which could significantly reduce their coripressibility.
The marsh deposits are underlain by sands, silty sands, silt and occas- -
sionally by organic silts which extend to depths of at least 85' as indicated
�y the explorations done previously. These materials are only slightly com-
pressible compared to the marsh deposits.
Although the data obtained from the recent and arevious investigations
are somewhat limited, they dc indicate a somewhat regular variation from least
compressible in the south becoming more compressible in the northerly direc-
tion. 7here was sQme 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 sketch indi-
cates that the ditch lies entirely within the 60 foot wide building set back
required along Lind Itvenue, b!e caution that such sketches tend to be self
serving, inaccurate and do not reflect disturbance of the adjacent ground by
3
_i
side sl �pes or caving. We expect that a portion of ihe ground within the .
p i anned bui 1 di ng areas may have been di sturbed by +i-:i s di tch e;<cavati.�n.
Warning signs and �tner evidEnce indica��s �ilat there are bu;i::d power lines,
a water 1ine, a �etrol�um pro����ts -Y�ne ann sew2� and �•�ater 1ir�e -stubs on the
pruperty near Lind Avenue. T�ere also are two petroleum aroducis l �nes j�;st
�outh �f the site and ya�.! ���re advised tnat t`�ere is a o0 inc�� Ci�; of Seattl?
aque��sci i� the s�utn �a1 ` of the 23rd Street right o� way.
'her•e iTid�/ CE' Gtil��' +.Ii.l ; 1 �icS 0�1 OY' d��vQCCiI i. -J i�lF. �i �2� !'dt' dl� ^('.L
attemp� zc iocate or ideni,ify a' 1 of t��e i.ti 1 iti2s.
-2st pit excavations wer� �ot ieft open lcng enouyh �o al �ow gro�nd wa�er
ievel s to stabi 1 �ze. Ho���ever, bas2d on co i �r changes a�c� the condi t;on�
obser�led in zhe fili we ex�eci that �round w�t�r lev�ls ha��e been a�out 2 1J2'
be7cw �he s�rface in inter�or portions of the fill slcping downward to depths
of about 5 feet towards tt�� lcwer gro�nd as�d dra�nage ditches adjacert to the
sl ��.
E+ccept for Lind Avenue, wnich is complete, the street right af ways
adjacent to the property are �elow the site grade. Taylor Avenue on the east
and 23rd Street on the south are significantly below the siie grade and act as
drai nage way s.
SETTLEMENT BEHAYIGR: Set'tl ement �+ue to ce,mpression of the soi 1 s under
the weight of the fill plac2d in 1968 should be ess�ntially complete. There
wi 1 1 be new settl ement re�ated to char�ges i n si te grade and fi 1 1 pl a�ed fcr
the building pads and also re�ated to building and storage loads.
There wi 1 1 -be va�i-ata-ons i n settl emen-t whach wi 1 1 tend to accur. as ------_ -___ __
differential settlements which could cause d�stortion and damage to the
buildings. These variations will be related to variations in the soil cordi—
tions or building storage loads, Locally s2ttiements could be significantly
less if portions of the marsh deposits experienced drying in the past. This _
variable cannot be s«tisfactorily evaluated based on test pits or even with _
careful sampling and testiry. We cannot know soil conditions beyond the
infcrmation develo�ed in our explorations nor can we know tY�e possible varia—
tions in warehouse storage loads. However,—our experience indicates that
these variations should not be najor and are not likely to result in noticabTe
differential settlement or damage to the buildings, Thus, it is our opinion
that it wou� d not be economical to preload the site or to make other than
ninor provisions to minim�ze the damage that may occur due to differential
s2ttlement. It appears more econamical to accept the risk and to repair the
damage if it occurs than to bear the cost of reducing that risk.
There are t7ree low co.st construction provisions that we recommend that
should reduce the potential for damage or reduce the cost of repair. These
are 1) providing extra long ar,chor bolts at column locations so that coiumnc
coul d be rai sed and shimmed if in�i vidual col umns settl e out of 1 i ne, 2)
Providing access to cross bracing between colum�s and building frames so that
these may be adjusted if necessary, and 3) at the junctions between the
elements of each "L" shaped building, providing construc�ion joints of over—
4
i
� i
la�p�iig siding or spaces filled with a mastic or �lastir rraterial .
We have anaiyzed s2ttlement for th�e� casFs: ii a 2' thick�e�s of fi i 1
and concrete floor slab i� build�c�g areas, 2j calumn loads of 25 kips, and 3)
storage loads averaging 250 lbs per sq. f'. The ;nticipated rarce ofi �zttle-
�:�ent and differentia� seiiler�nt in inches ,`or �ai:h oF the thr•ee condii,ior,s
.nd each �f tf�.e �our q�,a:,rants cF tl�e si te �re �s f��l lo�rs:
buiidina �ad b+. i'd?rg storage load
ranc� �;rf. :rang� �:ji f�. �ang2 ::i ff.
�OU��1t�a�L _-3 L 1�2-z i 1�� fl-� li2 � 1/��'.
Souryedst 1-3 2 1!2-? '_ 1J2 0-1!2 1 l./2
Vorthw2st 2-5 3 :-3 2 0-2 2
�;ort�east 2-5 3 1 1i2-3 I 1i 2 0-2 2
Settlements are additives, ho4rever�, a substantial portion, �erhaps one
;;alf, af the building pad settiement wi ' 1 occur during construction and will
not b� noticed in t�he buildings. Settlemer;ts wi11 occur fairly quickly a�d �
should be about half or two-thires ccnplete in 2 months.
ti�e 2xpect tnat settl ements r�j 7 1 be ieast al org the sou�her-n boundary of
tiie property i ncreasi ng somewhat uni forml y i n the northerl y di recti on. Thus,
tne var•iation in settlement should tend tc result in a tilt of the buildings
rather than damaging distortion of the bu� ldinas. The tilt will be relat:vely
minor and normally would not be noticed.
FOUNDATION SU�PORT: Either a coFltinuous �trip type of `oundation rein-
`orced to support concentrated column loads, or column foundaticr,s connected
wi th wal 1 footings founded on dense exi sting fi i 1 shoul d be sati sfactory. In
either case we recer�mend that steel be provided at the t�p and bottom of the
ccntinuous or wal l footing to develop the maximum bending strength of the
cencre`,,e.
We understand that the building frames will be tied together from side to
side through the floer slab to deal with� thr��st develop�d-at- the founGation
level by the building frames. -
Foundations should be suppor`ed on dense fill ar.d may be desig^ed based
on a bearing pressure of 3,OG0 lbs per sq. ft. for column footings with a
minimum dimension of 3', and 2,000 lbs per sq. ft. for wal ] footirgs with a
minimum dimension of 16". Exterior footings should bottom at least i8" below
grade except that footings depressed for truck dock height loading need be
only 12" below the adjacent grade. Interior footings for future interior
effice bearing wa11s may be thickened sections of the concrete floor slah or
strip footings bottomed at least 12" beiow the top of the s�ab,
Footing excavation� should be made using equipment with smooth buckets.
Teeth that would d�s�urb soil below the excavati�n should not be 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.
5
ldherever bui 1 di ng founda�i ons a;pr�ach ���i tr.i r, 20' of i nci cated expl cra-
tion locations, particular ca�e should be taken to confirrn that the soils in
the footing area have not been disturbed by the test pits.
Footing excavations should �e inspected hy a qualiPied geotec}�nical
�ngineer to confirm that the soi7 upon which tt;e �ooti�gs will bear is dense.
S?TE PREP/�RATIO�J: 1de •recommend that the locatior and d2pths cf all the
utilities and pip�lines ">c �+e-terminc�, tef�.�re �<��u �s�ablish uui ��'in� 1oca�icns
or begin site work.
The site is vet�y near?y flat and is rot sloped sufficientl;� `o!^ dr�inage.
As a result there are a number of ponds, particularly in the central portion
of the si�te. The ponds are shallotiti�, appreximately 6" or so deep, hovtever they
will interfere witti the construction work and with necessary recompaction of
the upper portion of the fi11 . bJe expect that the ponds tivi11 dry rapidly
duri ng dry weatlier. The easiest way to get rid of these ponds i s to wai t for
dry weather which normally prevails from May through September,
If it is necessary to do the work before the pends dry, they could be
ditched and drained to local sumps and the �vater pumped to a storm drain
system. I t wi 1 1 be necessary to very Fi nel y s 1 ope di tches by hand to get ti�e
water to the sumps. ?t �ti�oul d ret be practi ca i �o di�cn '�o dr�ai n the pands to
the edges of the si te.
For the existing fill area,a�e recommend the follo�rring 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, justprior to placing new fill 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 with heavy rollers to obtain a density of at least 95� of the maximum
dry density as determined by the ASTP�I D 1557 ccmpaction procedure.
Trees have grown significantly larger on the south edge of the fill and
in the unfilled areas of 23rd Street. Portions of 1;he 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 ar�eter be removed ei ther wi th
dragline equipment or with cables. The remaining vegetation can simply be
pushed flat ahead of fill placement. We recommend that the initial lift of
fili in this area be a minimum of 2' thick or thicker as required to keep the
upper 1 1/2' of fi 1 1 above water 1 evel s. The i ni ti al 1 i ft of fi 1 1 shoul d be a
coarse free draining material , either a rocky fill , sand and gravel , or mixes
of these materials. This iritial 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 Iayers of fill should be placed in
layers no more than 3" thick, conditioned to a moisture content suitable for
compaction and compacted to 95% of the maximum density.
6
The City of Seattle aqueduct is about 15 feet from the north half of the
23rd Street right of way. 6Je do not know 'r�ow ti�is aqueduct is supported.
Fillinc the north half of the right uf way to the level of �i��e existing fill
should not dar�iage the agueduct, horrever as a precaution to r�inimize the risl:
, of damage we reccmmend that f-i � i a? acener,t and coirpaction proceed in a dif��c-
tion para7lei to the aqueduct.
��e ��raul d �ae gi ad to i u��'�cf�er ar;� 1 ��=e t�,�e effec�s �- ihi� �rojec�c �n ����e
aqueduct, but rnore infornatior on the aqueduct would �e necessa;��,
Si�7ce fi 1 1 i n ihe street areas adjacent to the exi sting fi 1 1 ;•�i 1 1 be ov`r�
areas that have not previously experienced fill 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. i-de
estirnate that along 23rd Street, as much as 1 1/2' of settlement could occur,
�fJhich would leave a dip in roadways that cross this area. We believe that it
woul d be best to fi 1 1 the area now and i f you wi sh, to overfi 1 1 by approxi-
mately 8". 61e expect that wi�thin a few months time about half of the settle-
inent will have occurred and that the area could then be leveled.
Some settl ement �ai 1 1 probab 1 y con ti nue i n the now un�i 1 1 ed secti on of
23rd Street where it may be necessary to redo driveways or roadways crossing
thi s area i n 3 or 4 years.
Any clean soil material should be suitable for use as fill except for �he
initial iift in 23rd Street and the final 12" in roadway areas. In roadways
the upper foot of new fill should be a material approved by a qualified
geoteehnical engineer and with a C3R value of at least to provide better
suppert for the roadways and to approximately conform with the fil1. Also the
final 4" of fill in building pads should be capillary break material as
described in this section on SLAS ON GRADE FLOORS.
Ul�ILITY CONSTRUCTION: The existing fill contains a significant number of
rocks. that couid 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 fevr racks will be encountered, however below 2'
increasing percentages of and sizes of rocks wili be found. At depths of more
than about 6' rock _pockets should be expected. Below the fill a mat of
vegetation and soft compressible peat and organic si ? t soils �rill be encoun-
tered.
Ground water levels will be h�gh 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
shering and dewatering. Dewatering may be acc.omplished by a variety of
methods. Perhaps the most practi cal woul d be to di g shal 1 ow pi ts near the
trench alignment and use sump pumps to punp the water down. Water flows may
be v ery hea v y.
7
�ho�in.: ti-ri 1 � be necessary fcr the �af�t;� of personr�el s�o���:i��a i ��
y��encnes more than 4' deep.
There is a nossibility that methane gas or petroleu,� product fumes will
;�E_ =ound. It is also possible tha�t the 1:renches will fill with gas excluding
cxygen. All of these conditions can be I�azardous and potentially le'thal to
��iorl;men, 4�le recorrnnend that a cneck far methane or other hydrocarbons be �nade
i;� newly excavated trenches. Trenches snould be tl�or�oughly veriilated �efore
t,�o��;;;n`n enter.
[�eddi ng for u ti ? i ties w� 1 1 be verS� important Uecause roc� in �the fi 1 l
��,i l l l i kely resul t in uneven support for uti l i ties. �or sewers or otiier
settlement sensitive utilities we recommend that the trench should be over
exca vated by 18" ar,d that 18" of pi pe becidi ng be provi ded. E l sewhere 6" of
bedding should be sufficient. The bedding should be a medium size gravel
tam�ed in place and shaped to confcrm to the invert of the utility.
For sewers or uti 1 ities at depths that �ti�ould extend through or nearly
through �he 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 tt�e
�ottom of the fill we recomnend that shoring or lagging be placed prior to
excavati ng niore than wi thi n 18" of the bottom of tYie fi 1 1 . Thi s shori ng or
lagging should extend through the canpressible zone and into the sand or silt
ueneath. Jacks and lagginy should be provided i:o support tfie trench sides.
Locally rocks will interfere with placing lagging. In these areas the rocks �
wi 11 have to be dug out first. Only shcrt sections, not more than 5 or 6
feet, of trench should be unsupported where the trenches penetrate the fill.
f1anholes also represent a significant se�tlement and differential settle-
ment problem. To the extent possible we recommend that you 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 ties 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 manhol es not be bui 1 t more than 6' above thei r i nverts
before beginning backfilling. Backfilling of the manholes and of adjacent
utilities should continue as the manhole is constructed so that there is never
nore than approximately 4' of manhole projecting above backfill. Otherwise,
the manhole structure bearing on exposed soft soil can cause failure of the
soft underlying soil.
�LEYATOR SHAFT: We anticipate that a pneumatic type lift will be used
�or eleaators. The piston would require a 14 to 16' deep well or shaft below
the elevator. lJater, rocks, soft soil and caving is likely to be encountered
in excavating these shafts. We expect that a casing wi11 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 nunber of alternatives including locating the elevators on the outside of
8
- 1
the bui 1 di ng ti�here conventi ona 1 dri 1 1 i ng equi pnent coul d be used, 2) pre-
placing casing in the buildings now, 3) drilling and placing the casings from
inside cf the building, an� finally excavation inside of the building using a
cackhoe. Some discussions with eievator installers may be useful in antici- '
pa�ing their requir2ments and selec�ing the least costly alternati�✓�. ,
PAVE'�EPJ i DESIGN: 'sde 2stimate that the CBR val ue of the existing fi 1 1 s is
Pav?;nei�t design may be �ased on this va7ue.
It is common practice to underdesign paver�ents or to design them based on
a sl�ort s2rvice life. Areas of high traffi� or n�avy ]���1 tr.affic loads or
��here there are locally unfavorable soil cr water conditions �Nill fail prema-
turel y, However, the cost of repai ri ng premature fai 1 ures i s usua 1 1 y 1 ess
ti�an the cost of more conservative pavement design.
Typical pavement sections for areas subject only to light passenger
vehicle traffic would be 4" of crusned rock base with a 1 1/2" thick asphaltic
concrete surfacing. For areas subject to truck traffic we recommend a minimum
of 10" of crushed rock base course and 2 1/2" of asphaltic concrete surfacing.
Synthetic filter fabrics 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.
Sutisurface drainage of- the subgrade is important. We -recommend that
catch basins be perforated near their bottoms so that water, which vrill
accumulate in pavement subgrades, can drain away. Catch basins should be back
filled with filter rock or with drain rock wrapped in filter fabric.
It is important to minimize the entry of surface water into the pavement
subgrade. Cracks that may develop should be sealed periodically. 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 in tI115 area, water wi 1 1 drai n
ar_ross 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 ,
compared to comp 1 eti on of bui 1 di ng constructi on. Pa vi ng i s often deferred i
unti 1 after bui 1 di ng constructi on i s compl ete so that i t wi 1 1 not be damaaed �
by the construction activity or crare 7oads, We recommend either that the 'I
9 I
pavemert be �ompie�ed before construction is begun er that ali of the pavement
and select subgrade placement be deferred until af�er construction of the
buildings is comp3ete. Cons�ruction traT`ic on selPct �ubgrade or base
courses should not be allowed.
�IF�1TT,�TIO^iS AhD :�DDIiIu^FtAL SFRY�CFS
Y�OU shau� � be d41at"P ;,ha c �i�bsurface CU1lu1 L1011S Cul�, clfi� OFt21i �O,VaI"V
betw�en ex.plo%aticn locations ard with ti���e. In adlition, unan`iLipa�e�
condir;ons thai cannot be ;ully �valuated �y a few ex?lerations may be ��.our-
tered d�rin� construction. ��erefore, �ie re��cmmend t��at a cont;��y2ncy be
included in your canstruction L-u�+cet and schFdU7e to al low t"or tnes2 eve��-
tualities.
;hi s report i s preparzd f�r use by you and ycur desi gn ieam. The data
and report shoul d Le �rov i Ged io ccnstr,�cti on c�ntrac tors for thei r b�;Gdi�g or
estinating, but not as a warranty of thQ subsurface conditions. IJe cannct be
responsible for the interpretation by others of the information in th� s
report.
Tf tne plans are revised, cr of other �arties will bi.iiid on or �eve7o�
the si te, w2 shoul d be ccnsul ted.
We recommend t;�at you retain us to review the geotechnical aspects of the
final plans and specification to see that they meet the intent of our recom- I
mendat�ons. For continuity ar�d because of the potentially troublesome soil
condi ti ons, we reco�r�nend tnat we be �orsul ted duri ng the si te preparation and _
gradi ng war.k or uti i i ty cons�ruction. _ _ _ . ._ _.
Yours very truly,
ATLaS GEOTECHNICAL ENGINEERI"1G, INC.
� Z� �
Roger we, Prineipal
4 copies submitted
Attachments t�'.A`^.,�,
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L Xy f OYa t7 OYl l�Q. 1
0-1.5 � Erowr Si.lty SanC fspa; �;mo�erately dense, damp) lfill )
I, S�-8,5 Brown to B ? ue Gray �i ? � with gravel , cobbles & boulders
('�L; sYitPi occ;?s��nal p�e;:e of r,+�,ed i�ecur�r�tely �ersc� wet) $
� i'tl �� } t'r�Cii �S yY"'3;lll�dl" �
,
G'
ti���;�.ce a: 8. .
�;, ��i�, .. ,?�nt.Ji; Uf' al?i� �' i C ��E_ � '-.Fii,�' �i'c`j,Ti;�tl?s �� C��;:3'rF� 1:,:,71i �x Z
�.�e�ce�a�cion �o b�� s�-e. �
��.�-lc.� �,�ay Si ? ty �sne Sard (�1��; ',�o�!erate'y iens� :vet). �
�rades fine and less silty,
Complete� 3/2�;35
Sainple DeGth ( ft) h'ioi stur'e Ccntent %
ll.�" i40
Expioraticn Na. 2
0-5.5 �rixed Brown 5ilt and �ravel (�•1L-GM) with ungular �ab�ies
and beulders. (fill )
' Change to bl ue at 2.5` ar,d wi th rock to 200 1 bs.
Cavinq at 4.5' ,
Seepage at fi' . -
o 5.5-10 Cobbles and Boulders with Silt,
z rock to 800 lbs, at 7'
� Some woody debris at 8` _
�
0
, 10-10,5 Wood debris, organic silt and vegetation. Terminated due
to boulders and heavy caving
Compieted 3/28/75
; Sample Depth (ft) Moisture Cor,tent �
m 10' 262
0
� W
3
W NOTES:
>
� 1) Depths in feet.
2) F�eTd engineer: Roger Lowe
3) Excavation using a EXPLORATION LOGS
Ford 755 backhQe ATLAS GEOT�CHNICAL
4) Moisture content is a PROPOSED OFFICE/WAREMOUSE
� percentage of the sample ENGfNEER1NG INC.
z
dry weight. PRO�ECT, RENTION, WA
; 3
` PLATE 2
�
� -- - - �...�.�s � ��
r' a I
Ex��or_t�on No. �
��-<�. 5 ero���n uravelly, Co�b':}� Silt (ML) ( fiii )
Chanye to biue-gray coTor at 2.5'
heavy seepace at 7°
��'ater levels 8. 25' 3/28,�75
Test pit no� open � cng Lnougr ;`or �,�ater level to
stabilize.
10.�--15.5 �t'�tv� Grganic S? 1 � �nd Siity °eat if?H/PT,I (modEr•at� ly
soft, mei�t� fdccapcd ve�etaiicr?
15.5-i� Gr•ay Silt with �Jrganic DebY'ZS (MLif�1H1 �modera�eiy fir'm,
wetl .
i 1;-18 �ark Gray r;ne S�lty Sand iSi�iJ (mocerately dense, wet?
Completed 3i28/85
S�rrp�e �epth (fit} Maisture Content a
14 210 �
a
z
m
0
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W
3
W i
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a I
EXPLORATIdN LOG I
S
4I2"6U'�- _ -�► �•�b�bl �=-r=�o z^?n s�� �:�; 1► .��702- -�.?�.,`n.•1���.a�cx'✓�;�.4r�� cx?,cx�� 3,��,.��' °A►�
C v -r � ';J-� r Lr'�".�:1 r-�
� tNCalNtt!-{1N(.a lN(�. PROJECT, RENTON, WA
Y
� . .. . . . . ._ .. . ... .. _ . . .
Z
< PLATE 3
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-�---�__-_. ��..�.,....�.�_ .._.��
d I
Exploration No. 4 �
0-3,5 Brown Sar�dy Silt ('-1L} with rcc;;s & ccbbles (moderatl�
dcnse, damp filll
3, 5-b.5 Bl ue Gravel and Coboles (^�oderately dense, saturatec�) ,
(fill ) i�
l�tiater at 3.� feet, heavy flor,. II
'�arge boulders, 200 lb+ at F ' �,
�,. �-y urown Orga�iic Sil � ( P�iL ) (rioeerate � y suft> �ncist } I
( topsoil ) .
�-i5 Grad'ati ona l cl,ai�c,� to F i �er•nati n�1 Bro�vn Grgan i c S i l t an�'
Peat (P1H/PT), peat layers to 8° thick.
15-ii. � Cark i,ray S�1 �:y Sand (Sh9; (N�uileratel y densP, rre�j
(h" thick si 1 t layer at 16,5}.
Completed 3/28/85
Sample Uepth ( ft) i•1c� stu��e ConLent lM)
8.5 120
i0 320
li 153
16.5 47
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EXPLORATION LOGS i
ATLAS GEOTECHNICA� PROPOSED OFFICE/WAREHOUSE �
Y ENGINEERING INC. pRo�ECT, RENTON, WA I'
o I
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3 P�.P,TE 4
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=x�lCration N�. 5 �
.�
�
0-9 Brown Sandy Gravel ly Silt (ht�) �i�r�ode+•ately dense, �.oist} C
(fill ) �
t
'�'�?t�l 1"OCK f!"3yi11�ritS d�i, 3 fee� �
�Ci � LJ �'�'U L:S :�i '��l �� . .:Il.: .��"c ,�. ..�. � _ �.., ... _, �
� t+;t.er ai �' ,
�
ip N-�2 ar�w� and �;rav Si1C (f�L) wiih �raa��:;� rrac��-,�;��;.s
f r�:.�'IC ..."o j h9 n,�i i�i m C a n t� /C G� �.r j �i� •�.1"^'.1�� �1� $- � i. �-i:l;`(1 i��'— i
c�i`.L�)/ C�C'llS�, tdPt� i
i
1L—i7 Darl: CT"d'y' �'�e7� U�il �3i1Q � �F' :� 1•il 1:;� _ t.('�CP. G� LI i t,; i
(medera�eiy dense , ��,er) . "
,
i
:'IC� Ud:S ur=;y 5 i � t i��;nt"S (�1�i �.!'IOC��'i"�'_�'' V `11"TI� ,:'�i di1�
�races �,f or;,ar,ic :,�t�rial be?e:ti '_� ^e� �. '
�
C i:U���Y�(3 L 1 l.Il I'i O. 5
- � " � r � �r�:•ame n �
0 7 B e�n Sand and Gr vel l Si , . '1�1_ with rcck s
r a
Y Y t ) _
!mcderately firm, moist) ;fiiil `
;,
� '
' � Rocky at 4' . i
�
� � 7-8 Broken rock ( fill ) . � II
t � �
a
i 8-� Organ9c material at 8' . �
I �
0 9-10.5 Brow7 Peat (�'T) (mederately firm, saturated) ��r�u Sil t k ,
� (ML) (moderately firr�, saturated) �
�
� �
� �; 1�.5-12 3rown Reat (PT) (moderately �ir,.n, saturated) - ,
, f
' ' ' � 12-17 Gray Si1t (ML) (moderateiy firm, satarated; ;
� � with occasional layers of peat at 13.5'. ;,
4
/�n /nr
� Completed 3iccio� ;
,
� � Sample Depth ( ft) ;��i-sture Content � �
0 3 Z36 �
W �
3 �
> '
� �
� �
iEX°LORAT�Tb� ��GS �
� ATLAS GEOTECHN�CAL FROPOSED �1Ff.IG"E/WARFHOUSE .
ENGINEE�ING li��. P�o�ECT, .��s�^�v, wa
m -
z •
, < FLHTE 5 �
Q .,...�.�..�.�_,�._.._, .� - —_.d .�..m._...��,-.�..�...�
EXp10!"dt10!' ;'d0. ;
0-3.5 Er�wn f•leciur�. S�r,d l�?� with siit (moderGtely �ense, %'ampl
{ fill )
?. _-,' Brot,rn Si 1 t�•� Srau�_1 (:,',,, (�ense �ampj
Chan.ge �o blue at 6' , hJater flo���ing in at 5'
;
.-_ L` IU� �UI.KV i I t i luCll�ci � iini�u i�i �y -�. . � 1
f - .., ,�'i�
� .�'��i. ��:` . _ _,. .,� ., �,. �
' � ,. -. � , . . . � �
1 c:-Q Rrrn.�n rlrn�niC Ci � t �1'IY� I fmoderatel V {i Y'(P, �c+UY'd��u,� '�
� _ _ _ � ... . _ �
f
S _-.._. 7 .]i�aiJ4l.�V�i7 ��iGi� i.�:J Lii Jrvii t"1.;. ., , ' � i �i.i"._c� � �E, � . � � t
sazura�ec) T �
12. 5-1� Dark Blue Gray i',edium �ar� (;�-S�') with silt
�omplet2d 3/28/85
Sample Depth (ft? ��oi sture Conte:�t .n
8 37
�xploraticn No. 8
G-2.5 Brown �i' ty Sand (�"�1? wi th rcots (noderately dense, ��oi st?
( fill )
Asphalt chunk from 2.5 to 3.5'
2.5-�.5 81 ue-Gray Gravel l y Si 1 t (ML) wi th rock fragments (der.se
moist) (fill }
' � 3. 5-9 �rown si 1 t (P1L) wi th occasiona3 rocks and fragmer.ts of
o vegetation, (fill )
� Z
m 9-9,5 Black Organic Mat
0
9,5-14.5 Brown Peat (PT)
Seepage at 12' grades with silt below 12.
l�r'r,�-_C.5 rl"%��d1.�011d1 cnange i3O rii"dy Sl � t 1F��� :i+�7 SO�iI� Cr�?n�r
�ebris. (�oderateiy dense, saturated;
� Trace of sanu at i6.5.
m Terninat2d at 16.5' due to obstruc�i cr,s that 1 imi ted
a excavation. � �
� 3I Completed 3/28J85
W �
�
�:!
�
�
EXPLORATION LOGS
ATL.AS GEOTECHNICAL ppOPOSED OFFICE/WAREHOUSE
r
ENGINEERING INC. p�OJECT, RENTOy, WA
0
Z
3
' � PLATE 6
o ��
�xploration �Jo. 9
�-3 Brown Sandy Silt {f�1L) ( filli
..-4.5 51ue Rocky Fi ': 1 (vzry dense} hard �i�9i�a.
s. 5-9 Sil ty Sandy �rav�l (GPi) (very dense, t��t1 ; `i ' l ;
_ . ,,.:n;. .,,- .. ;.,,, �. ,-.. .:� �... -. - �.. ...�.
.- _ j
� rcC;�xS l'u _� �1L� ai. ��. � I
i . _"j ..._. ._ _ �_ _ !i:J _.. ��'•:i �
� '^; .l� ^ �. '. . � ` . . a
� i1li�U llClit t � l,U V, U I GI�IC LCI� �p
� i
� = � " _. . !l=� .. �� - .� -i L - �� i ..� �.J._, ti ���� r I ': � .,��` �
-1�. �i .)'::1' _ i_. � l=. �.� �..l:;..
M
a a
�
14, 5-1� ��Y'd�dt� Ofld � ���lall:j2 �v .'�I1X2u :'Edt dF�Q l:�dV J1 fL l? i7I',,!
(f�rm sa�ura ted)
i!-�� u."d�i �i � t (.��� ,, i�l =�t';c(I1C i� =�4�'�;'�S. �. �C�2'''-,ic'�, fiY'fil� E
sa tura te�)
C�mpleted , %O%c5
Sar�pl e Depth � ft) �loi sture Content a
IO 101
11 185
, 12.5 193
ll T4
o '
Z
m
0
i
;
1
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m
^
3 � i
>
�
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, E„PLORATION LOGS
� ATLAS GEOTECHNICAL PROPOSED OFFICE/k'AR�HOUSE
� ENGINEERING INC. PRo�ECT, RE^JTOr,, t��A
. >
m
z
3
` PLATE 7
�
0
�xeloration No. 10
0-8 Brown Sandy Gravelly Silt t"L} �dense, rrcist) �oci:s �o i8"
lfill }
Change ta blue at c'
Seepage and s::nz ...., . �q a` c'
;-_ ..��: -_. .' - „ _ -, -
� _;nl�il'dli0fl . ;p0�`_'U, ��!'�_r��� �c�. 11!y '
!
. � �Y•�IjCL�7.y.i'.,r� ,�... ,.. ,
� t
� _ _ ., � . - nn �ovnl (CD� I_m(•���FY�'?�v QE.'Y!Sf? S;i�U�'7T.Cd� �j
"iJ.
� �
` k
j _.5-li.., �t'QW!1 F"EdC an:i Ji ; L �ri ;`i'ili� �
I Chunk of partia i iy decayed woud at i2.� f
t �14. 5-:6 Gt�ay Fine Gravel (�P) (moderately dense, satura�ed)
.
10-17.5 I�lixed Peat a^d Silt with °eat (oT�r,�u) �
17.5-18 Dark Gray Silty Sar�d (5Pi) (no�erately cer.se, �•rei)
Ccnpleted 3/29/85
�ample Jepth ift) F�oisture Content �
10 147
11 I33
i
�
0
� Z
m
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,
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i �
�
m
o �
W �, 3
> �
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i �
, I
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EXPLOR.AT:OPd LOGS
ATLAS GEOTECHNICAL ?ROPOSED OFFICE/WAR�HOUSE
} ENGINEERING lNC. PRo�ECT, REr;To�v, wa
m
Z
3
; PL.AT� 8
� o
�xFloration ��o. 11
0-1.5 Brown Sardy Gravel ly �i1t ( i�i�;� �;��ioderateiy dense, damp;
(fill ?
1. 5-. .., �ccl;y . �11 ��,ith �ilt
Cc'or �hange to blue at 4.5'
�
t . `_�-ii ii l i9 C K 0"';::1111 C i 1:� �C 1' i� i . �
� �-1� 7 'C�1'JIl Uf U'dl11G J 1 I i, 1 .�.�i .. i �il �.� yc��i .. .... '�c. .�� . �. � , '
� :�:'.,^.� ,.... . _`_� 7
� l:_-_I :��dClu�llil��d� ...;r!iG� T,Ci 'vi'�,ili i'cu � �� � j 1��....J,... ._ _� i ' r. . . Y
i j
� ncist)
'�-13. � Gray Silt (h1L-�1H ? (rrith fragr^en�s of organic mate�ial �
(mcderai,el y f�rm, r�oi st) �
1�. 5-1:.5 Cark Gray Sa�� (SP ) w; t!� sor� si 1 t (mccera�ely dense,
�+`
�a+ura�� ,
Completed 3/29io5
Sam�le Gepth l=tt �loistu�e Conte7t � _
S.5 95
10.5 253
�
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z
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II
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I
i I ' 1
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m
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I 3 � (
> �W
OC
tXFL�:�RATION !Q�S
ATLAS GEOTECHNICAL PROPosFo orFic�/wa��Ho�js`
>
ENGINEERING INC. PRo�ECT, REhJTOP�, WA
m
z
� 3
` PLATE 9
i o �
I
�Y,��Ordt10T "�0, i2
J-3. 5 Bro�m Sandy Si i � (��?Li (mccerately den�e, damp} tri i l ;
�•rith som2 rccks at 2'
�. 5-S 6rown and E l ue wi th Ora�;ge Layers, SandS� ��,a:��i l y �cbt l y
Si ': � (��1L) (mocerately dense, moist) (fill } �
� .�-�. 5 =�.C;:k� i', .l - il�_vy rin�;� nf ..'_*ar i
.
� �^:OC k 'CO Z � K Z _� � :
.!
� n n i_ �. „ �., !
j �..i-7 ✓ ..�t. '�:_ �... ..:vli ,I.:i. -
� �
� y
�-Il. � a�"0:`:Cl 'ci"y,:t?1C $1 1 ,, (.�, 1 (mrJ,ini�:•� i� __°�=?, S_�_:1'���=� :
i
iC.5-11.5 G�ay si lt ;""L; ;mcderately d�nse, sat�.:rated) �
�
11. 5-15 Gray h'eGium Sand (SP? (r�oderately dense, saturatedi �
:5-'S.5 ur-ay Silt (hi�) (m2dera�ely dense, satu�,d�ed) �
15. 5-15. 5 Dark Gray Sand (SP) (Moderately dense, saturated)
Conpleted 3/29/85
Exploration PJo. A
0-6.5 Erown P•1edium Sand (SP} (moderal:ely dense - loose, moisti
� ifill ) (caving}
; Vegetation mat at 6.5
z 6,5-9.0 Brown Peat (PT)
m
' o
; iermination @ 9' due to severe caving
�
� Conpleted 3,�29/85
� -
� �
; I
; >
m
3 � 1
; >
�
t��LJRAT:or� ioGs
I ATLAS GEOTECHNiCAL PROPOSED OFFICE/'�JAREHOUSE
_ >
ENG�NEERING INC. PRo�ECT, RENTON, WA
Q
z
3
' � PLATE 10
i o
� � .
� �
i , -,'
� �
�. 1 , ,
j i
1 ` I
GEOTECHNICAL REPORT
Cedar River Corporate Park
SW 21 st Street and Lind Avenue SW
Renton, Washington
Project No. T-5996 �I
. �.._. a..... _
' - tK� �:�::
:: r �, :� = ti Terra Associates, Inc.
� : ���,���§�.
� } . ^
,. �- s,�u.».�,.>-
,e_r `9 ��:•
.« i': -
Prepared for:
TARRAGON
Seattle, Washington
December 7, 2006
� �
TERRA ASSOCIATES, fnc.
icr^,•�It2nt5 �n t;,e_�te��h-'�i�al �n�,n�erin�;, C-eUingv
and
Environmental Earth Sciences
December �, �'006
P;oiec''`o. T-`996
'�dr. '��lurph�•;�icCul;o�.:�11
TARRAGO'v
]pOQ Second Avenue, Suite ��C�O
S�attle. «'ash�ngton 9�104
�u�:ec- Geotechr.icai Repor
Cecar River Coi�o:�ate Park
S��'21st Sneet and Lind Avenue S�'�'
Rerton; 'J+"asl:ir.gton
Re2erences: 1 Report of Soil Investigation, P:oposed Storage Tern:inal, Rento7, `?�'ashineton.
prepared by Dames and Moore, dated A1ay 24; 196�
2. Report of Supplemental Investigation, Proposed�'�'are�ouse/Offi�e Building Site,
Lind Avenue, Renton, �'�'ashingtor., pre.pared b�� Atlas Geotechnica] Engineering, Inc.,
daied Ap:il 1>, 19fi5
Dear�1r. I�'icC�sllou�h:
:�s requested. .�e have co�ducted a geotechnical engineering study fo: the subject project. The attached report
presents our findings and recommendat�ons for the geotechnical aspects of proiect design and construchon.
Resuits of our field exploration confinn soil conditions as indicated by previous site studies and summarized in
ihe referenced reports. Vb'e observed eight to ten feet of silty sancL'sandy silt fill overlying native soils composea
of organic silt and peat follo«�ed by interbedded a':luvial ]ayers o1 sandy silt, silt, and silh- sands. ��'e also
observed groundwater seepage in our test pits at depths of 9 to 14 feet below current site grades.
In our opinion, the exist,ng fill will provide suitable immediate support for conventional sp:ead footing
`oundations. Hov��ever, the immediate organic silt and peat Iayers���ill be subject to consolidation settlement due
to stresses imposed Uy the spread footings. If the risk for distortional settiernent cannot be toleiated; a maiority
of t:,e potential settlement can be mitigated by surcharging the building sites.
Detailed recorrunendations for surcharging the building pads and design of four,da!io:�s along w��ih other
gectechnical design considerations are presented in the attached report.
1 ?�25 �°��illo�vs Road, Suite 101, Kirkland, �1'ashington 98G34
Phone (425) 821-7777 • Fax `.4251 821-4334
!�1r. '�l�r��h., I�1'�C���lou��i�.
Dc�C't�"�er �. =Ci�;1h
���e trust the inioiYnation presented is su;.�cic:lt r��r your cunent needs. If �ou ha�-e �:�y que�t�uns or re.quire
additional irformation,please ca]].
Sincere]ti vours. ,
TERR� ASSOCIATES, INC.
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Projcct'�o. T-�996
Page'.�o. i�❑
T.=�13LE OF CO'�TF'�TS
Page �o.
3.0 Project De;cription.......................................................................................................... 1
2.0 Scope.of Work................................................................................................................. 1
3.0 Site Conditions................................................................................................................ ?
3.1 Surface................................... �
............................................................................. �
3.2 Subsurface.......................................................................................................... �
3.3 Groundwater....................................................................................................... =
4.0 Seismic .............................................................................................................. ............ �
5.0 DiscussionandRecom:nendations.................................................................................. �
S.1 General ............................................................................................................... �
�.2 Site Preparation and Grading............................................................................. 4
5.3 Exca�-ations.................... ................................................................................... 6
5.4 Foundations........................................................................................................ -
5.5 Slabs-on-Grade....................... ................................................. "
...........................
5.6 Storn�v��ater Detention Pond............................................................................... �
5.? Drainage............................................................................................................. 9
S.R Utilities... ..................................................................:........................................ y
5.9 Pavements............. ........................................................................ 9
......................
' 6 0 Additiona] Ser��ices........... ...... .......................... ........................................... .. ........ .. 9
� � 1_�r.-�:�ano:1� __. .. . . ........ .. .. . ......... ... ... .. .... ........... ....... ... 1•:�
Fiourc�
�i:initti �1ap ..._........................ ........... ............................................. ................................ Fieu:e 1
Exploration Location Plan ...................................................................................................Figure 2
Typical Settlement A'Iarker Detail........................................................................................Figure 3
Typi�wl �T�'all D�a_naEe Detai' ._. ...... _. ....... .. _ ...... .......... _ . ........ ........... ......._........ Figure 4
.�.nPendi�
rield Explora;ior. ar.d Laboratory Testing ................_........,............... ............................Appendix A
Test Pit Logs Bv Others ...................................................................................................Appendix B
�
� '
Geotechnical Report '
Cedar River Corporate Park
SW 21st Street and Lind Avenue SW
Renton, Washington
1.0 PROJECT DESCRIPTIOI�
Tnc approximately 11.�-acre site is located bet���een SVJ 21st and Sl�' ��rd streets; east oI Lind Avenue S��' in
F;cnton, «-ashington. Site de�-elopmer.t �vill include construcr.ng 4 office structures each approximately 33,000
�auzre feet in size. Specific ouilding design information is not yet available; ho���ever, ���e expect ihe buildings
.�:11 be constructed using precast conc:ete ti]t-up «�all panels with interior isolated columns supportir_g the roo2
�:-ucrui-e and possi�le mezzanine leve.s. Floors will be constructed at grade at elevations near current site grades.
�:ructural loading is expected to be �ight to moderate, with isolated columns canying loads of 80 to 100 kips, and
_���rir.g walls carrying 6 to �kips per foot.
�:oi-m�;�ater ��-ill be co]]ected and routed for treatment and cont��olled discharge fi-orn a detention pond located in
:};e northeastern panhzndle of :he site. Specific. pond construction!design information is not yet availaLie;
:,,�«ever, we expec.t the pond will be constructed primaniy by excavations extending 8 to i2 feet below current
�:te grades.
:�;e recoirunendations in 2he followine sections of this report are based on our understanding of the preceding
des�gn =eatures. ���e shoulc review design drawings as they become available to verify that our recommendations
ha�,�e bee.n properly in:erp:eted and t� suppleme.�t them, if re�quire.d.
'.0 SCOPE OF �'�'ORK
t:)ur work ti�-as comple#ed in accordance with our authorized proposai, dated October 23, 2006. Accordingly, on
\o�ember 1, 2006, we excavated 8 test pits to depths of 13 to 15 feet below existing surface grades. Using the
re�ults of our subsurface exploration along v✓ith eaisting soils data from previous studies perfo:med at the site in
196R and 1985, we perfonned analyses to develop geotechnical engineering recommendat:ons for pro;ect design
�nd cor;tructio:�. Specifically, this report addresses the following:
• Soil and groundwater conditions
• Seismic
• Siie preparation and ��ading
• Excavations
• Foundation support alternatit-es
• Slab-on-grade support '
• Draina2e '
• Utilities
• Pa��ements
Decembe; �, 2U�;.�t�
P:ojec: '.�10. �I��_:9u6
Il �150U1�7 be ;:�OI�C I)l'dT fCCU1Tll77e71i�aL10]75 O'.::�i=1Z� :il ir1S IZrO]'I ie�a:�lil� �7:3'.T12�e cIe dSSOClaielj �']i�l �0'_�
sn�ength, design earth pressures, erosion, and stabil�2;-. Design anc perionnance issues •���th respect to moistnr�.
as �t relates to tne stiucture environroent (i.e., h�midiry, mildev��, moldl :s be��ond Terra Assoc�a:es' pur��ie���. _'�
bu�ldir.E envelope specialist or contactor c?-,ould be consulted to ad�-e�< <he�e :s�ues, as ne:dc�.
3.0 SI'1'E C�'��ITIONS
3.1 Su►•face
T}le Ui0'eC: �1:C ;S .�_`�:�tC� :�l�L]:::C'��i OI t:'.t� ;'1TeT�Z�T10� l'�: ti��� �1�1 �I]�:C: 3'_C 1_]I:�: _�V�C'?U�' �T�'� 1�� �C11'-.Oi�.
�ti'ashington. The approximate location of the site is sho«m on Figurc 1.
The site is nearly rectangular and includes a sma11 panhandle parcel that iorms tne sites northeaste;n corner. T:;e
site is cuiTently vacant w�ith surface vegetation consisting of deciduous trees with moderate blackberry and brus:�:
understor;�. The site is ele��ated above adjacent parce;s to the nor.h, east, an3 south and at grade w:th Lin�
Avenue to the west. The s�te was filled in the late 1964s in preparation for developing th,e site as a fuel storage
facility. P�ev�ous e�piorat:o^ com}?leted at th: site b�� uthers :n 19F�, indicated fill dept'�. 02� to :0 feet across
�he p;opert�•.
3.2 Subsurface
SOl� CODCI1t1011S ��'� C��:�C?;�'..•� d: I�ic i���.;li �l_' �'11 �?:.�A";:?10I15 CO:liII'ITi I�'iC C'a:"i:.�l� �;te� 5�'.li�]e5. L': C�Ti2T.i�. AA'�
obsen-ed approximately nine to ten feet of fill material composed of silry sand and sandy silt mixed in areas «;ti�
irzcturea fragments of bedrock. Large boulder sized (two- to four-foot diameterl bedrock fragments were
observed below tluee to four feet at a?1 test pits. This fill overlies the original surface vegetation v�-hich appears
to have included some small trees as logs were observed at a few of the test pits. Underly;ng the fill and orig:ral
organic surface la_yer, we observed a two- to four-foot Iayer 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 feeL.
Underlyir.g these or�anic s��ils, alter-r.a'ing !a�.�ers of ��lt} san�. silt, and sand�: silt �vere obser��ed to tre test pit
ter.mination deoths.
The Geologic A1ap oj�the Renton Ouadrangle, i�'as'r�ington, by D.R. ?�lullmeaux (196�j, maps the site so�ls a�
Peat (Qlp) and Alluvium (Qau�l. The native soils «�e. obser�-ed in the test pits are consis*ent with these
descriptions.
The preceding discussiori is intended as a general re��e�.� of the soil co:.dit�o:ls encountered. For :nore complete.
descriptions, please refer to the Test Pit L.ogs attached in Appendix A and B.
Page I�o. 2 i
P�:�C171t��i . �1,1{i(,
PTO��Ci ?�0- i-`��9t
3.i Ground�ater
�T�'e observed �-oundwater seep�ge at depths ran�:ng irom 9 to ]4 feet belo« the current site elevat�ons. The
p:evious 1985 study at the site indicated light to hea�y ground«�ate; seepage :nto the test pits at depths rangii;�
, from 6 to i0 feet below site erades that ex�sted at thai time. Fluctuations in �ound«�ater levels will occ�r
seasonally and annualh-, with ]owest levels anc votume� occurring during late sumr.�e:to eariy fail (Julv throug::
SCpte1T:�Jet�. �'71�'eri t}1C �1I772 OT : al� OUr e�;��.0�2�'.C�:-. �%,OI�: '�',�45 Ci�77�t:t'ie.�i. c.Oli_�C��'3[�I Sz:�'3£e �;�'e!� i)t?�Cr�'z�
:ikely represent seasonal ]o«�le.-el�.
A two-inch diamete�r slotted P��C ;�:pe- �.�.��� �n�.�;lt� :n Te�t F:; TP-' ���he:� b;:�,:ki;;led. Ti�is in�tai;at�on, u�hi.e
crude, will allow ior measurmg the depth to groundwater during the upcoming wir.ter months and obtain a better
understa�ding of seasonal h�gh groundw�ater elevation at�he si�e. �'�'e expect the groundwater would be�rese7t zt
depths of*�ve to ��x ;eet bel���v tl-�:e su-face du-ine�nd �ho:tl}� follo���ing the «�et��-inter sea�on.
�.0 SEIS:l�iIC
B3SZC1 CI! t}1B 5011 CU?"i1:721Oi15 e:1COL:I:��i�Zl� di1Q O:1' UI1�ET�t3I":cj1T1E OI cl�ed �ZO10��', ��C1� SC�t:��P. �f�l_` V: i�l� �OI)_
L�emationa] BLilding Code (IBCj, site class "D"should be used in design of the sn-ucture�.
Liquefactio7 is a p::enomenon �l;ere there is a reductiun or com�lete loss of soil strength due to a: ir.c:ease izi
��-ater pressure. induced by vibrations. Liquefaction mainly aflects geologically recent deposits of loose, f.r.�-
gra�ned sand and silty sand urderlyine the �-oundw-ater table. Soils of th�s nature derive their sn�e:�gth iror:,
�ntergranular friction. The generated water pressure or pore pressu:e es�en:�all�� sepai-ate� the �oil ��a:-:s and
eliminates this intergranular friction; thus, eliminating the soil's streng`h.
Infonnation obtained from our recent subsui-face exploration indicates tt:a: the deeper na�ive soil� at the site a:e
alluvial in origin. Grounc���ater was observed at variable depths ranging from 9 to 14 feet below current site
grades. Historical data indicates that the alluvia] sand layers below the water table exhibit medium dense to ver.
dense characteristics. The deeper alluvia] soil strata composed of sandy or clayey silt, due to tneir fines conten�.
will exhi�it cohesive strength, and are not significantly be affected by the ]iquefaction phenomenon. Based on
analysis, in our opinion, the risk for soil liGuefaction to occur at�he �ite and it� associated hazard are lo«.
5.0 DISCUSSIO�A1D RECO?�'ItiIENDATIO'�S
5.1 General
The primary geotechnicai consideration that w�ill eo�-err: s�te de��elopment is tr:e potential for distortional building
settlements to occur due to the compressible organic silt and peat layers f!�at were observed across the site. These ,
native soi] layers will consolidate under static dead loads imposed by the structures and product loadine on floor '
slabs constructed at grade. Assuming a 100-kip column load, a bearing s�-ess of 2,000 psf, and a maximum
footing depth of 2 feet belo�� cunent site grades; analysis indicates settlement ranging from 1 to 4 inches could
o�c;.ir with differentia] movement of 1 to 2 inches. VVe estimate the differentia] settlement would occur over a
ouilding span of 100 feet. This settlement will likely be distortiona) and cause buiiding cracking along with
misalignment of doors and windows. If the risk for distortional building settlemeuts cannot be tolerated, a
majority of the potential settlement can be mitigated by surcharging the buildin� sites. Surcharging would
mvol��e placing additional fill on the buiidmg pads above the finished floor elevations to induce primary
consoiidation sett:ements to occur before building consh-uction is initiated.
Page No. 3
)�iCCII'_r�C- , �;1(IF�
�'r��"'�.' ��� T_"��Jr�
Il1 L�U: Or::110I'i, ��1:. �?::�T1T'i�' ill� C��tiJ :.:�Z SUfiiClell�!:j iOII:�?.�I IO �1T0�'ll�� �ll1ldb'le 1T:lI7lZQ:2ie� �U��ll,>]�[ iV1� :!lc
buildings using conventional spread footing foundations. Ho�rever, the soils are se:�sitive and ���ill be eas;l�•
disturbed by normal consuuction activiry. Consideration should be giti•en to placing a four-inch lzyer of crus`�ec
rock o�-er the bearir.g subgrade to ser��e ac a wo�king mat and to protect the soils from disturbance especiall� ii
work occurs during the. winter. Similar consideration should be given fer protecting the intee:ity of the buildm`
floor ar.d pavement subgrade. Cement amending the st:n�.��3e s} o��.,ld �� :��-�.idercc i:t'.:�,: cons.r��cr,on �ci�ed����
:esults in the soil subgrade bemg exposed to we'.���eathe:
The fill and native soils encountered at tne s�te contain a si�nificant amount o; fines and will be d;2:icult t��
co:�lpact as structural fil] when too wet. The abiliry to use on-site soils fi�om the site excavations as stru�tural �:11
w�ll depend on its moisture content and the prevailing weather condit�ons at the time o2 construction. T?��
earthwork contractor should be prepared to dr�� the soi's b}� aeration during ihe normally dry summer seasur. tc�
facilitate compaction as sn���ctural fill. Altematively, stabilizing the moisture with cement kiln dust I;CKD i.
cement, o�� lime can be considered. If grading activiUes will take place during the u�inter season, the earthwork
and u:il�R- contracio�should be prepared to in�port clean granular maiei-ial for use as structural fill and bac�cf:,l.
I�l add�tion, the utility contractors should be prepa:ed for encountenng large boulder-sized bedrock fi�agment�
«�ithin the existing fill where excavations e�:tend to depths of four feet and greaier belo� the site. These large;
fi��gments v�ri11 not be suitable for reuse in backfilling the utilih�trenches and will Iikely require disposa] off-site.
Detz�led recommendations reearding these issues and othe: geote�hnical desien considerations are provided i:
the fo]lowing sections. These t-eco-nmendations should be incoiporated into the 2ina1 design d-aw.ngs and
co:��t:uc:�on sPe:ifications.
� ' Site Preparation and Gradin�
Surface vegelation and the upper organic ;oil ;a}�er �hou?3 be stripped and removed from the s:�e. Based on o.:r
recent test pits, surface sh�ipping depths of about six inches should be expected to remove the vegetation anc
near-surface oreanic layer. Once clearing and erubbing operations are complete, grading to establish desirec
building ele��ations can be �nit:ated.
Exposed subgrade should be obser�e�: b� a re�resentztive of Terra Associates to ��erify t�at so�; condi:ion� are as '
expected and suitable for support of ne��� construction or additional fill. Our observations may inciude requiring
i the contractor to proofroll the exposed subgrade with hea�y 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 remored to firn�bearing and �-ade restored with�new sm:ctural fill. If the depth of excavation to
remove unstable soils is excessive use of a geotextile reinforcingr''separation fabric, such as Mii-afi SOOX or
equivalent, can be considered in conjunction with clean granular structural fi;l. Our experience has showrn that,
in general, a minimum of 18 inches of a clean,granular structural fill over the geotextile fabric should establish a
stzble bearing surface. Alternativeiy, it may be feasible to s�abilize the soils by amending with Portland cemer.t;
CKD, or lime.
Page No. 4
Decemher ?. �OU6
Prple�t'\o T-``-�ali
I1 dT3ljli7o aCi;�'IC]ZS GI'� p�8:1r1G� �U�1P,� t�:e ��'�i v:lllte: :7lOIli}l�, 3,it7 :}le 017-�1i� SOI�S ti�COIIIe :00 'vVe: tQ 3C�11e.�'e
adequate compaction, the oNmer or contractor should be prepared to treat soils with CKD, lime, or cement, o-
,mport ��et w�eather structural fi11. For �i�et weather sh�uctural fili, �ve recommenu �:nporting a granular soii thac
_ meets the foilowing grading requiiement�:
C.S. Sie��e Size Percent Passing
6 in;.hes ?00
T�o. 4 75 rnaximum
'�10. 20� 5 maximum*
*Based on the 3:'4-inch fraction.
Prior te use, Terra .Associa�es, Inc. should examine and test all materials to be irzported to the site :or use as
struciura] fil:. Structural fill shou)d be placed in uniform loose layers not exceeding 12 inches and compacted to
a mi�:imur� of 9� percent of the so�l's maximum dry dens:ty, as determined by American Society fo: Testing an�
�laterials (ASTA-1) Test Designation D-69£� (Standard Proctor). The moisture content of the soil at the tirne ot
compact�on should be ��-ithin tv�o percent of its aptimum, as determined by this .ASTM standard. I�7 nonstructural
3_e�2� ii _C�r ''�;i�}..?;':� ,; Ut'.�:'.�' TI'ZIii}]:� i1���U'�t� d �:.�:�1 ��� -i '..C:. ?;ie �:�:C: 01 COIT1t�3Ci70.^. C`Ll: DZ I.�UCZu �,� y��
errct:t
.`',� `::�:eu �3T�1Z1�. :1 :U'�T]C3:!O:: �Un'rl�t7� l� t?:�1i�.���� i0 'a�Z�; �A'�c�}leI", C0;1S1�z1'2hl)Il S�IO���C� 7e L:�-eI7 lU �]:UTeCT117�
the sub��ade from disturbance by placing a four-inch mat of crushed rock over the subgrade to serve as a wrorkin�
mat. For the building pad and pavement subgrade subjected to dynamic loading from cor.siruction vehicle traffic,
amending the top 12 inches of subgrade with Portland cen;ent or placing 12 inches of wet «-eather eranular
structural fi;l on ;he. sub�-ade to prevent deterioraUon should be considered.
Surcharge
As discussed earlier, if distortional settlement ranging from 2 to 4 inches in total and 1 to 2 inches differentiall.
over a 100-foot span cannot be tolerated, we recommend surcharging the building areas to tnduce settlement in
the primary consolidation range prior to building cor.struction. For this procedure, we recommend placing fill in
the build�ng areas for a minimum height of three feet above proposed building fnished floor elevations. This
surcharge fill does not need to meet any special requirements other than ha��ing a minimum in place unit weight
of 120 pounds per cubic foot (pc fl. However, it may be advisable to use a good quality fill to raise grades in
othe.r portions of the site, such as parking and driveway areas, or use for trench backfill if necessary. The
surcharge fill should extend a minimum of two feet beyoi�d the edge of the perimeter building footings.
Total settlement under the surcharee fill is estimated in the range of two to four inches. It is estimated that 9G
percent of the consolidation settlement will occur in about three to four weeks following full applica'ion of the
surcharge fill.
Page No. 5
I
Decrr:-.b:� �. �UC�f
i'r.�-::t �vu .-"��t
�1 u ','Z.IIi;� L�lZ 31:11Ui:i��I S�:�1�IIlZT;1 d.i� l}7C IllIle ;�LZ OI?_�OV�II1�:][. i�'i� SLTC}�3C���IO�Ca'I� :.'.OU��7 �� (:111R1LOIe�u '�'�
installing settlement markers. A ty�ica] settlernent marker detail is shown on attached Figure 3. The sectlemen`
marker should be inscailec on the existing erade pnor to pla�ine any surcharge fiil. Once installed, elevations c=
both the fill height ar.d marker should be taken dailv unti; the fu1] hei�ht of the sLrcharge is in plac.e. Once full�.
s�srcharged, readings should contiaue weekly unr_1 the anti�:i},ate� ��t:lements ha�e oeeurred. '�ior.:toring e::ta
s�~�ould be for�varded to us for review wher. obtained
It is critical t?�at the �-adin� contractor recognize �lle ur.pu�tance o2 t:,e �et.i�ment ;r.arker installat:o_,s :�;;
efforts muct be made to protect the markers from damage during fil] placement. It is difficu':t, if not imposs�ble.
to evaluate the progress of the preload program if the markers are damaged or destroyed by construct;on
e�:uipment. If the markers are impacted, it may be nec.essary to install new markers and ext;nd -:-,� �::;ch�r��:r_�
time pei-iod in order to ensure that settlements have ceased and building construction can beg�T-:.
Following the snccessfui completion oT the �urcharge program, with fou�dations designed as recominer.ded,n tl-:e
Foun�ation Section of this report; maximum total post-construction se.ttiement is estimated at about 1 ',�� inches
���:ch difTerential �novement of about one-half inch. If post-construct:on settlement oi this maenitude i� :,o;
cor.sidered acceptable, bui!dings should be supported on a F��le ro��.:ndati�:1.
5.3 Exca�ations
f�li eXC$V2L]O11S 2t :h: SIiC' :�S�V�131ev 'i.':�ii �0:7::Lcu ���':e5. �.li}: G� Cll1:;1 TTe11�}"��S Illl:rt n� l0!7l�'-zlCC li.
accordance ��-ith locai, state, or Iederal reqwrements. Based or cu:rent Occupational Safet} a:,d H�alth
Adm:nistra'.ion (OSHA)regulations, soils found on the pro;ect site���ouic be classified as Group C soils.
For proper�y dewatered excavations more than 4 feet but less than 20 feet in depth, the side slopes shou'd be :::id
back at a minimum slope inclination of 1.5:1 �Horizontal:Vertica]). If there is insufficient room to complete the
excavations in this manner, or if excavations greater than 20 feet in depth are planned, using temporary sl-,orir.g to
support the excavatior,s may need to be cons.dered. Ltil�ry trench sidewalls can be su�ported by a properl�
des:gned and installed sho,ing trench box
Groundwater seepage should be anticipG:e� ���i,nin e��cz�atiuns e-hten�ing to depths u'_�ti�-e feet and creater be;o���
existing surface grades. For excavationc be]ow ten feet, the volume of water and rate of flow into the excavatio:
may be s:gnificant. Shallow exca�-ations 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 o: collection
trenches. Deeper excavation may require dewatering by well points or isolated deep-pump wells. The utility ;
subconh�actor should be prepal-ed to implement excavation dewatering by ���ell 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]ift station construction or sanitary sewer connections.
Th�s information is provided solely for the benefit of the owner and other design consultants, and should not be
construed to imp;y that Terra Associates,Inc. assumes responsibility for job site safet��. Tob site safety is the sole
responsibiliry of the project contractor.
Also, as noted earlier, the contractor should be prepared for encountering large boulder-sized bedrock fragments
����thin the existing fill below depths of four feet.
Page No. 6
L�cC.t'll��r -, ?l��_�b
�" 1J1:
� I�,nc:l ��i` T-_ _-b
�.� �'oundations
�.ri OUI� O�?li]7011. ttle �Ul�ii;;:!'_?i'.31' 'JZ Sli�lpOti�;� 017 l'�U^F.�."::101�c. SL�:ee� i00T:P_E tOilriClBLIOII: �e2�1:;Q 011 Ui1�lStli"�:�
subgrade composed of exist�ng morganic fill Founda�ion subgrade should be p.epared a� rec.o:nmended ii;
Section �.2 of this report. Foundafions exposed to the weather should bear at a minimum depth of 1.5 feet belo��,
adjacent erades fo� frost protection. lnterio- :oundatior.s can be supported at any conven;ent depth belo�� the
floor s3ab, provided im:mediate support is obtained on a minimurr. of t«�o feet of sh-uctural fil;.
�'�'e re.comrnend decigning foundations for a net aliowable be.aring capac�ty of 2,000 psf. 1=or short-tern� ]oads,
such as wind and seismic, a one-third increase m this allowable capacity can be used. Following successfu;
cox:ipletion of tne surcharge program, with foundations bearing at a maximum depth of tvuo feet belo��� currer.t
site grades and «�ith the expected building loads, estimated tota] settlement shou'.d not exceed ] ', inche� �,���t:�
differentia] settlement over a '.OG-foot building cpan not exceeding one-half inc}:.
If founda�ion depths will exceed two feet, c�zss imposed on the organ�c conso'�:dati:�g 'ia��er ��-�1: inc:-ea�e. I:
footing subgrade w;]] exceed two feet �elo��. ek:i;��n� �:re gr�:de. �.��e .h�u�c be :=or.:ied a~��3 ���:�;ec t�� ree�.al�aat�
potential foundation se.tlemer.t impa�t�
For designing foundations to res:st latrra] lo�a�_ a ras� incuon coe_�i�c�:en: vi `v.:� c�n be u�ed. Y�:ssi�.�e «-t:�
p:essures actine on the sides of the footings can also be conside.red. VVe. recommer.d calculating this laterai
resistance u�ing an equivalent flu�d weight of?50 pci. �'Ge do not recommend including the upper 12 mches or
soil in this comp:�tation because it can be affected by «�eather or disturbed by future grading activity. This value
ass.:mes the foundation will be constructed neat against competent native soil or backfilled ��it�-; strLctara: ti:'.. ��
�E'SCl":�1��� ;?-! CeCT:O;i 5.� Qr'•.}]:S fepO:�L T}':e A'diil�� :ECO"11I71eIl��lj :'1��'lije 3 SC:e1V f'1Ci��7� C�f 1 �
�.� Slahs-on-Grade
Slabs-on-grade may be supporte.d on tne subgrade prepared as recomr_iended in Section 5.2 of tliis repo�l.
Immed�ately below the floor siab, we recommend placsg a four-inch thick capillary break layer composed oi
clean, coarse sand or fine gravel that hac less than three percer:t passing the I�o. 200 sieve. This material «�il:
reduce the� potent;al for uptiard ca�il:ary mo��emer,t of�,�ater f_,rough the uridea�l.;ine soll and subsecuen: ti��etting
oi.he floor s.ab
Tne capillary ��reak ]ayer �ill not pre��ent moisture :ntrusion through the siab caused by water �apor
transmission. �T�'here 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 v��;th a
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 gravel layer overlying the membrane �s saturated prior to
pouring the slab, it w��l] be ineffective in assisting in uniform curing of the slab and can actualhr serve as a v��ater
suppl�� for moisture �ansmission through the slab and affecting floor coverings. Therefore, in our opinion,
covering the mernbrane with a layer of sand or gravel should be avo�ded if floor slab construction occurs during
the wet winter months and the layer cannot be effecUvely 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 (.4CI) lvlanual of Concrete Practice, Section 302.IR,
st�:ould be consulted regarding installation of vapor barriers and concrete slab-on-grade floors.
Page No. 7
L)2���Pi��Cr . �(i[�F,
P;�'�C��: �'0 �I-Ci�v��
�'G;� ��Sl�❑ �?I [IlZ� f�Gvi��BDS-0;1-�,=3C�; 3 SU����I��Z :lli��j�.]�L:� i,ii�i Oi :11�._' �,��:) ;all '�Z 11�E�.
5.6 Storm�r•ater Detention Pond
T�e stonr.v�-ater pond wiJl be iocatec i❑ :':�e no-tr;eastern pan ha^.c:: �2 the pri.�pern. T�,� pond per:mrter ���i]] 1�,
fo:med by cast in p]ace concrete retaining walls. As ti��e un:'����anj. the r�:amin� ���all f;�����tint� ����ill bear a: :,
depth ot about secen to eight feet below-existing site grade�
Two test pits; TP-1 and TP-2, ���ere excavated within t::e proposed pond area. I�� Eeneral, soi� condiu�,n�
observed consisted of three feet oi loese to medium dense silh,• sand fill overlying fill composed of ciayey s�:�
��ith weathered bedrock pieces to small boulders. Beneath the fill, at depths o2 eieht to ten _`eet, we observed t}:e
origina] oreanic su:-face layer of brown organic silt to peat. At depths or 9 to 14.5 feet, ��-e observed eray silt t��
g:ay silty sand. �'e observed moderate to hea�y groundwater.eepage at a c�epth of 14 feet in the te�t 7 its.
To estab?:sh suitable support for the pond perimeter waUs, rt will be necessary to excavate and re::����.e tl��
ex:sting fill and peat from below the wall fo:�ndation. The excavation to rernove this unsuitable material should
extend la.teral]y from the 2ooting edge a minimum distance of three feet. O:�ce.removed,the foundation grade ca:�
be res'ored using structural fi:l placed and compacted as reco�nmended in the Site Gradmg and Preparat�or
section oi tl:is report (Sectio:� 5.2). 1�he wall footings can then be designed using soii parameters outlined in t};e
Foundation section fSe�tion �.Sj. The e.xception ���ill be the la�era] passive earth p�essure resistance. Beca��e
the 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 1 b0 pcf. This ��alue requires tnat the footing be bacicfi3led ���ith structural fill and the
, iill extends horizor.tally :n fi-ont of the footing a d;stanc.e equa] to the footing thiclrness or depTh belo�; the pond
floor grace.
T:�e magnitu�e o= earth pres�ure de��elopr.�ent on the �;ond ret�_ni:,t �,tia:ls ���i': pai,l�,� de-pend on t�e cualirt� oi
backiill. We recommend placir.g and compactine wall backfill as structural fill. To guard against the buildup of
hydrostatic pressure, wall drainage must also be installed. A typical wall drainage detail is attached as Figure 4.
�T�'ith granular backfil placed and compacted as recommended and drainage properly installed, �r�e recommend
designing retaining walls for an earth pressure equi�-a!ent to a fluid weighing 3� pcf. When necessary, to account
for traffic surcharge, the wall should be designed for an addit�onal height of t�vo feet. If the vvalls cannot be
effectively drained. the.v shoul�be desiened to support an earth pres�are equi���aient to a fluid weighing 85 pcf.
5.7 DraiiiaQe
Surface
Final exterior gracies should pr�mote free and posi:ive drainage away from the site at ali times. �'Jater must not
Ue allowed to pond or collect ad;acent to foundations, or within the immediate building areas. VJe recorrunen� ,
providing a gradient of at least three percent ior a minimum distance of ten feet from the building perimeters. If �i,
this gradient cannot be provided; surface water should be collected adjacent to the structures and disposed to
_ appi�opriate storn:facilities.
Page I�o. 8
De:ember ,, ��,j�_�t
Pr����ct `:o i--��>���C
�.�� t�tilitie:
L-',ility pipes s::oulc t,e bedccd a�d bacniillec in ac�ordance «':.h American I'ubi-:: 1�,orks :'�ssocia;�or. �.�P�'��.,.
or City of Renton spec;t�cations. As a minimum, trench backfill should be placed and compacted as structu�a:
fill, as described in Section 52 of this repori. As noted, most of the existing fill and the underlymg native so:]�
�vil] be wet of optimu:n moisture when e�:cavated. The utility contractor must be prepareC to dry the soil b_,
aeration or amend with CKD, cement, or lime to stabil�ze the moisture to faciLtate proper compaction
Alternatively, or if utility canstruction takes place durine the wet winter months, it may be necessary to impor:
suitable wet weather fil] for utiliry trench backfiilling. Also, the utility conn�actor should be prepared :or
encountering small to ;arge boulder-�ized fragrnents of bedrock contained within the fill in excavations t11z:
extend to depths of four feet and �reater. The.se b�,ulder-�i7ed 2ragn:ert� «��:11 not ?�e s•�itarle ror reuse in trrnch
backfili and«�ill likelv require o'f-�i±e dispo�al.
5.9 Pa��ements
The pa�-ement desien section is dependent upon the supporting capabiliiy of the subgrade soils and the tia1���
conditiens to which it will be subjected. Vde expect trafric at the faeility wili consist of rnainly oi cars and l;ght
trucks, vs�th only occasional hea�-�.- traffic in the form of tractor-trailer rigs. For design considerations, we ha-.e
assumed traffic can be represerted by an 18-kip Equ�valent Single Axle Loadins (ESAL) of 50;000 over a ��:�-
}-ear design life. Vl'ith a firm an unyielding subgrade prepared as recommended in Section 5.2 of this -e.por;, «�e
recorrunend the following pavement section alternahves be used:
• T���o inches of AC over three inches of asphait-treated base (ATB'�
• Two inches of AC over six inches of crushed rock base(CItI3�
In areas where Portland cement concrete (PCC) pavement will be con�idei ec, ��e r��om.mend a minirnam �* da�
concrete compressive strengtli of 4;OQ0 pounds per square mch (psi) be used with a minimum un-reir.f���ce:i
thiclrness of five inches. Control or construction joints should not be spaced at inte�vals of more thzr= �'0 jeet.
Asphalt concrete should meet the requirements for %z-inch HMA, as outlined in �'��ashington State Drpart:�;ent o?
, Ti-ar.sportation's (��'SDOTI standard specifica;ior.s Asphalt-:Teated base and crus:�ed roci:base shoulc al�o meet
WSDOT requireinents.
- Long-term pavement perTor:,;ance ���i�: �epe;1�3 on su:_ace �r�uiage. A pourl�,�-dra�ned pa��ement section «��1] be
'� subject to premature �ailui-e as a resul: of surface ��ater infiltrating -.nto the subgrade soils and reducing their
sLpporting capability. For optimum pavement performance, we recommend surface drainage gradients of at least
two percent. Some degree of]ong.tudinal and transverse cracking of the pavement su:face should be expected
o�-er time. Reguiar maintenance should be planned to seal cracks :��hen the��occur.
6.0 ADDITIONAL SERVICES
TeiTa Associates, Inc. should review the final decign drawings and specifiications in order to�erif;�that earthworh
and foundation recorrunendations have been properly interpreted and implemented in project des�gn. We should
� also provide geotechnical serv�ces during construction to observe compliance with our design concepts,
specifications, and recommendations. This wrill allow :or design chan�es if subs;:rface conditior.s di:rer `rom ��
- those aaticipated p:ior to the start of constructior. !
Paee�o. 9
L�e�:e:rihe�r . �_I(�b
�'i�O1�Ci ��. T-^�9`-+(,
'.0 L1�lII�AT10\S
«-e p�epared th�s re.�or; in accordance ���th �e:erall_ti accepted geo�echr.i�al eng�neering p:-act�ces. ?�'o other
�van�anty, expressed or implied, is made. This repo:l is the copyrighted p:operty oT Terra Associates, Inc. and :�
intended for speeific application to the Cedar Ri�-e- Co�orate Pa�k Fr���ect T�:�s repo�t �:� f���; t�,: e�:��u�i�e �.:�r
of TARRAGOI�T and their authorized representati��es.
The analyses and recornmendations presented in tr��s repo;t are ba�ed on data obtain�d ii-om iae test pi;�
exca��ated or, the site. �'ariations in soil conditions can occur, the nature and extent of���hich rr.ati� not become
evident until consti-uction. Tf�>ariations appear e.�-:dent, Terra Associates. I_,c�. should be requested to ree.�°alu4�e.
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REFERENCE: THOA4AS GUIDE CD-ROM, KING!PIERCEJSNOHOMISH COUNTIES, 2004 NOT TO CALE
: �:� Terra VICINITY MAP
, •'• Associates, IC1C. CED REN ON, WASHI�NGTON ARK
Consultants ir,Geotechnical Engineering
Geology�and Pro'. No T-5996
Em�:�on-�erta'Eartn S��ences J D2te DEC 2006 FlgU�e 1
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�-^-' :�� ��sF i '
�:' c_,o ..�.<
NOTE:
THIS SITE PLAN IS SCHEMATIC ALL LOCATIONS ANC EXPLORATION LOCATION PLAN
DIPJIENSION�ARE APPROXlMATE. IT IS INTENDED FO
REFERENCE ONLY AND SHOULD NOT BE USED FOR CEDAR RIVER CORPORATE PARK
DESIGN OR CONSTRUC�`ION?U�PosEs. RENTON, WASHINGTON
REFERENCE:
SITE PLAN PRO'dIDED BY CUENT Proj. No.T-5996 Date DEC 2006 Figure 2
STEEL ROD
� PROTECTIVE SLEEVE
�
�
�
I
HEiGHT VARIES
SURCHARGE (SEE NOTES) : SURCHARGE
OR FILL � , . OR FILL �
� .;v%i.. , ;;;��%i�.;�i�/'2�.`�./�� V�/>;/i`./iAii :���/i,- /i.��i:i'/
�
� II
NOTES: I
1. Bl�SE CONSISTS OF 1;2" THICK, 2'x2' PLYINOOD l^JITH CENTER DRILLED 5.�8" DIAMETER HOLE.
2. BEDDfNG MATER�AL, 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" DIAtJIETER
PLASTIC TUBING. SLEEVE 15 NOT ATTACHED TO ROD OR BASE
6. ADDITIONAL SECTIONS OF STEEL ROD CAN BE CONNECTED VVITH THREADED COUPLINGS.
7. ADDITIONAL SECTIONS OF PLASTIC PROTECTIVE SLEEVE CAN BE CONNECTED WITH PRESS-FIT
PLASTIC COUPUNGS.
8. STEEL MARKER ROD SHOULD EXTEND AT LEAST 6" ABOVE TOP OF PLASTIC 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, ft1C. RENTON, WASHINGTON
Consulta�ts in Geotechnical Engineerinc
Geolcgy and Pro No.T-5996 Date DEC 2006 Fi ure 3
Env�renmental EaRh Scie�ces 1 9
12" MINIR4Uh1 3-4" .
MINUS WASHED
- GRA\'EL SLOPE TO DRAIN
— �
�2„� ,;.. ,
_ �
;",
'.j;
� ��-, ;j;
`='-� COMPACTED ' �
�� . STRUCTURAL FILL \
�a, :;.
,- �
o'�;� �
,� \ \.
�, ,
��,� : .: ,.. ,�
SEE NOTE � �'' �
,,�,� EXCAVATED SLOPE
/ ; -
� �- (SEE REPORT TEXT
FOR APPROPRIATE
6"(MIN.)� � INCLINATI�NS)
� �.J -�, �� , -_ � 12" OVER PIPE
�� e� -�,.`;h ,�� /—I i
. .�.,�;. - . • . `�' �L
!�,
. ���.��.� ;� . .
v' ;"—� 3" BEL01�J PIPE
4" DIAMETER PERFORATED PVC PIPE -�
NOT TO SCALE
NOTE:
PfIRADRAiN G100N PREFABRICATED DRAINAGE PANELS OR SIA4ILAR
PRODUCT CAN BE SUBSTITUTED FOR THE 12-INCH WIDE GRAVEL
DRAIN BEH{ND WALL. DRAINAGE PANELS SHOULD EXTEND A��41NIA�U��1
OF SIX INCHES �NTO 12-INCH THICK DRAINAGE GRAVEL LAYER
OVER PERFORATEC DRA1N PIPE.
�� Terra TYPICAL WALL DRAINAGE DETAIL
CEDAR RIVER CORPORATE PARK
•• Associates, It1C. RENTON, WASHINGTON
Ccns;:,tants i�Geotechni�al Engineermg
Geolog�and � Proj. No.T-5996 Date DEC 2006 Figure 4
Env�ronmental Earth,,,.�erces
�,
J
APPEtiDI?� A
FIELD EIPLOR.ITION AND LABOR�TORY TESTI:�G
Cedar River Corpoi�ate Park
_ Re�iton,�'4'asl►ington
On November 1, 2006, we performed our field explorations using a mid-size trackhoe. VVe explored subsurface
soil cond�tions at the site by excavating 8 test pits to a maximum depth of 15 feet belova existing �urface grades.
The test pit locat;ons are sho«-n on Figures 2. The test pit locations were approximately determined by
:�;easurements from existing site features. The Test Pit Logs are preser.ted or. Figures A-2 through A-9.
' �.n engineering geologist from our office conducted the fie]d explorat;on, classified the soiJ conditions '
.�;coun.ered; maintair.ed a log of each iest pit, obtained representative soil sampies, and obsen�ed pert�nent site
�earares. All soi] sampies v�-ere visually classified in a�cordance ���ith the Unified Soil Classification S}�stem
iL1SCS) described on Figure A-1. '
Representative soil samples ob?a.ned from the test pits were placed in closed containers and taken to our
laborztory• for further examinatioa and testir.g. The mo;sture content of each sample was measured a.nd is
reported on the Test P:: Logs. Grain size analy-ses v:ere performed on Tour samples. The results are show�n on
Figures A-10 thro�aeh A-1 1.
Pl�cte�c:�o. T-Syy6
fv1AJOR DIVISIONS ' �E�ER ; TYPICA� DESCRIPTION
' Sl'MBOL I
---- — ,
� CIeBn ' G�/v Vdel!-graded gra�.�els, gravel-sard mixtures, little or no
� GRA`'ELS Gravels � fines. ,
� �; (less than G P � Poorly-graded gravels, gravel-s2nd mix�ures, li;tle or !
O co N , More than 5% fines'� � ne fines.
� ���, i 50`.-0 of coa�se '
fraction is Silty g�aveis, g�avei-s2nd-silt mixtures, non-plastic
� �:� � � larger than No. Graveis GM I fines.
�._ with fines
z � �; i 4 sieve (�jC Clayey gravels, gravei-sand-cl2y mixtures, plastic fir.es
0
� o� CIe2n � SW �hreli-graded sands, qraveily sands, littie or no fines.
`n SANDS Sands
0
w �Z (less than j Poorly-graded sands or gravelly sands, I�ttle or no
� s c f�lore than 5°�o finesi SP ; fines. �,
Q y� ; 50°i� o` coarse
C � fraction is SM i Sil�y sands, sand-silf mixtures, non-plastic fines.
U �� smaller than ' Sands ;
No. 4 sieve with fines
iSC Gayey sands, sand-clay mixtures, plastic fines.
, �
� inorganic silts, rock flour, clayey silts with slight
� �o ' SILTS AND CLAYS ML 1 plasticity.
�� I
O �N CL , Inorganic clays of low to medium plasticity; (�ear clay;.
� o � i Liquid limft is less than 50°Jo
� C� '� i �L i Organic silts and organic clays of low plasticity.
Z irr3 � , —
Q �� a'� � ; MH � Inorganic silfs, e�astic.
� L a� ��' ' SILTS AND CLAYS �
� a � � CH � lnorganic clays of high plasticity, fat clays.
z o v� i Liquid limif is oreater than 50°��
lL � ' Q�}-� Grganic cl2ys of high plasticity.
---- 1
HIGHLY ORGANIC SOILS i PT � pe2:.
DEFINITION OF TER�1S AND SYMBOLS
;r, i, Standord Penetration T 2^ OUTSIDE DIAMETER SPLiT
W Density Resistance in Blows/Foot � 1 SPOON SAMPLER
J
0 Very loose G-4 �r 2.4" INSIDE DIAP�IETER RING SA��4PLER
� ' Loose 4-10 �� OR SHELBY TUBE SA���PLER
w Medlum dense 10-30
= Dense 30-50 1 �NATER LEVEL (DATE)
� Very dense '�� 'I
Tr TORVANE READINGS, tsf
Standard Penetraf,on Pp PENETROMETER READING, tsf I
Consistency Resistance in Blows/Foot DD DRY CENSITY, pounds pe- cubic foot II
w
>
� Very soft 0-2 �L LIQUID UMIT, percen: �I
= Sofl 2-4 i
Medium stiff 4-B ; PI PLASTIC INDEX
O I Very stiff g132 N STANDAR� FENETRATION, b{ows per foct
� Hard >32
T@CI'a UNIFIED SOIL CLASSIFlCATION SYSTEM
� \`'`� CEDAR RIVER CORPORATE PARK
�� . -� Associates, It1C. � RENTON, WASHINGTON
Consultant�in Geotechnical Engineering
Geology and
Environmenial Earth Sciences P�oj. No. T-5996 Date DEC 2006 Figure A-1
LOG OF TEST PIT NO. 1 FIGURE A-2
PROJECT NAME: Cecar �'ver Cor`orate Pa'k PROJ.NO: ?-5G9b LOGGED BY: DPL
LOCATION: �enion. 'JJ2shin�ton SURFACE CONDS: Brush APPROX. ELEV: td-r"1
DATE LOGGED: _[�ovembe� � 2006 DEPTH TO GROUNDWATER: 14.5 Feet DEPTH TO CAVING: N:'r;
u
O I ' `—'
z
_ � DESCRIPTION CONSISTENCY; � a I REMARKS
r- a RELATIVE DE�SITY — � ;
w Q 3 y I
O N U
i O
G i
i �
FILL gray to b��.vn s ltp sard,rou;s seme asp`�alt r���e. Loose to �
� trace gravei,fine gramed,rn•��st. tiledium Dense i o.2
I
I
J i
I
25.3
FILL blue gray clayey sitt with weathered bedrock aieces
5-� Medium Stift I
to 3 feet in size,old roo:s,sticks,wet. �I
to Siiff
i
_ `
�
1 �
� � � ;
Brown oraanic S��T tc fiberous PEAT, st�cks,weL {PT) '
Soft
i
�C,,
��� Gray SILT to clayey SILT,organic inclusions,moist to i Medium StiH
_ wet. (ML)
to Stiff 43.7
I
I I � �
1 i 34.0 j
� Gray si.ty�tc clean SANJ,floe oralned,wet. (SM;SP) Medium Dense � �
I
= i
�— Test pii terminated at 14.5 feet. �
Modera!e groundwater seepage oGserved at 14.5 feet. �
7 I
i
�� I
20
u-�-, Terra
�:��..�;
NCTE Tbis subs:riace'nlormaf:o��per.ains oniy te Ih s test pil lo;zlion and shou�d ! jy ,,:���� Associates, �CIC.
n�t be inlerpreteC as Ceinq indica6ve oi other locaiions at 1he size. Cc^sultaMs in Geotechnica Engineenng
� Geology and
Er�e rcnmen:ai Earth S:�ences
LOG OF TEST PIT NO. 2 FIGURE A-3
PROJECT NAME: �,aciar Rive�CorP ra'r Pa�F PROJ.NO: T-�•996 LOGGED BY: DPL
LOCATION: Re^ton `,Nashin�ton SURFACE CONDS: B•ush APPROX. ELEV NiA
DATE LOGGED: November ^ 2006 DEPTH TO GR�UNDWA7ER: 14 Feet DEPTH TO CAVING: N,A
I �
� �
_ � � _
� z z
=.
x � CESCRIPTION CONSISTENCYi i e d ! REMARKS
a � RELATIVE DENSI7Y ; — w i
w a 3 Y
o ' � �
I i a �
_ I
i F!LL:gray tc brown silty sand,roo!s,trace gravel,fine Loose 10 ,
�I I grained, moist hledium Dense '� 11.6
i
I
c
� �s.o
� _' FILL gray brown ic biue gray silty sand to sandy silt,
i weztherea beCrock pieces below 7 feet,moist to wet. hledium Stiff
te SUff �
I �
�
Srown organic SILT to fiberous PEAT,wel. (PT) Sofl 152.2�
i
77.0
10 I
Gray dayey S1LT,organic inclusions,wet. (ML/CL) Svtedium Stiff 55.9
Gray silty SAND,fir,e 5rained,tivet (S��Sj P,1edi�rr� Dense
= 28.7
�5 Test pit termir,ated at 14.5 feet
Moder2te groundwater seepage observed at 14 fee;. I
2-inch slotted PVC standpipe ins[alled. '
I
�
,
i '
i
2� '
ry��, Terra
Wv�E: TI-Is subsurface mformation pertains only lo this tes:pit b�,caticn and shcultl ;,y, ::�:.�" Associates, ��1C.
nc!be interp•eted as being mdicative of other locatioos a:ihe site Corsu'tarts in Geolechnical Engmeernc
Geology anC
�m:�rcnmental Ea�t`�Sciences '
LOG OF TEST PIT NO. 3 FIGURE t:-4
PROJECT NAME: Cedar River�or.�?�atA Pa�k: PROJ.NO: T-5996 LOGGED BY: DPL
LOCATION: Renton.'.Nashington SURFACE CONDS: Brush APPROX. ELEV: 1JIA
DATE LOGGED: !�Cvember 1.20�c� DEPTH TO GROUNDWATER: N,A DEPTH TO CAVING: N!A
i LL
I � �. N
� i � I
~ ' Z
" � � CONSISTENCYi ' '- � W I
x � � DESCRIPTION � : a REMARKS
�- a RELATIVE DENSITY I — �
O vai � � U
O
d
i
I
I i
, FILL:grey browr to brown silty sa�d w th gra��e',rocts, 9'4 i
some smaH sticks,fine ora:ned,mo.st. Loose;o �
�
P,�edium Dense i
i
_ i
5 � , !
i
I ,
FILL reddish-brown to blue gray clayey sandy slt witl- 25.6
weathereC bedroch pieces,smafl to medium large pieces I
, of bedrock,wet_ Medium Stiff
to Stiff
�
�� Brown organic S�LT to fiberous PEAT,small sticks,wet. 189.5
�PT� Soft
I
i
i
i
I
Light grayish-brown clayey SILT,c�ga�ics,�vet. {MUCLj Med�um Stiff ' 106.3
Test pi;term�nated at 13 feet
No groundwater seepage observed.
15 ' '
�� Terra II�
' ��n°�1'�'� ,�
rJOTE: This suosurace int;,rmz;ion pertai�s onlg to C��is tes!pit locabon and snc,u:d G .i;:'�•� Assoeiates, �I1C. �
r�ot be inte�preteG 2s be ng ind cahve e`c:her Ixal�c�s at t��sCe. Consu�tanls in Geotechnical Ene neering '
Geology anc �I
IEnvlrenme�d21 Ear{h Sc�e�ces I
I
. 4 � �
LOG OF TEST PIT NO FIGURE r,-5
PROJECT NAME: Cedar River Cor�2orate Park. PROJ. NO: T-5990 LOGGED BY: DFL
LOCATIO�: Re.^ion.1��ashin�ton SURFACE CONDS: B•ush APPROX. ELEV: fJ;A
DATE LOGGED: November 1.2��06 DEPTH TO GROUNDWATER: N%A DEPTH TO CAVING� N�A
� N �
f I O ' ~ I I
� ' Z Z I
x J DESCRIPTION CONSiSTENCY! � a REA"ARhS
a � RELATIVE DENSITY W
i 3
G ✓�i I I U
� a
� (6 incnes browo orcanlc SILTr40C?Si '
(
FILL:brown siity sand witn gravel to san�y s,l�witn br�k2n Loose to 4.2
! u�bedrock fire grained,mois?. Psedium Dense
1
I
5
FILL:browr io light brown sandy clayey siit wi;h broken up i� ?� �
bedrock pieces, lots of bedr�ck pieces tc 4 feet in size, !
mcs;. Mediuro Stif' �
tc Stiff
� I
;
_ I
i
10—I I 111.2
! Brown organ�c SILT to fiberous PEAT,smali sticks and �
smal logs,weL {PT) '
Soft 100.8
i
� 149.1
�
�ight grav�clayey SILT,organic indusions,wet j1�4L) !
T,4edium Sti`i 48.8
Test pi;terminated zt 14 feet.
15 No groundwater seepage observed.
� I �
� �
I �
�
�
i
�
2C '
Terra
NOTE Tnis scbsurface�ntormzlior pe��fains oMy to th s Ier pi; ocalloa a�,�5no��d :�> Associates, �CIC.
nct be interpreted 2s being inCicative of ether locaticns zt t`�e sne. Consultanis in Geo�echnical Engineer�r.c
Geology and
E^vlronme�lai Earth Suences
LOG OF TEST PIT NO. 5 F,�uRE�,-s I'
PROJECT NAME- Cedar R�ver Corpo�ete Park PROJ.NO: T-5996 LOGGED BY: CPL
LOCA710N: Renton bti�ash�n�tor SURFACE CONDS: Brusn APPROX.ELEV: N,,4
DATE LOGGED: Nrn- .mb .r � �R DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: N%A
LL
�
G ' ~
� Z z
LL
x � DESGRIPTION CONSISTENCY'; e � RE�J.ARKS
� a RELATIVE DENSITY , r �
a � 3 w
W Q Y
� �/1 I U
C
a
(6!nches black oryanic SILT!ROO i Sl
FIL�:browr�to grayish-brown sandy si!with gra,-e a fe�a•
large boulders,broken bedrock pieces with dept�to 1.5 L�cse tc 20.4
� feet in size,wet. A4edium Dense
;I I I �
�
5 i
1
18.4
FILL:blue sand�ctayey silt with bedrock pieces,small tc
very�arge sizes.occasional wood to smail logs,wet. h1edium Stiff
� to S:iff �
� � 1
i
i
, _
� � 71.7
1G—
Brown organic SILT to fibero�s PE;�T.some sticks to Soft
small logs,weL (PT) � i '
I �
1
I
i
Light gray c�a}�ey SI;.T w�th craanics we� !F.":Ll
�
nledium Stiff 76.6
7 '
Test pit term'nat�d at^4 feeL
15 Sl�ght greundwater seepage observed at 9 feeL � ,
I
' I
i
z� I
I Terra
NCTc Th:=_subs�rface intor.mation peRams omyto this lest pil I�xa!ior aod shculd Associates, �I1C.
nol be imerpreled as beino intlicative of other locations at Ihe s te Consultanls in Geotec�n�oa'cn�ineerng
Geology and ,
� E-virormen;al Earth Sciences I
LOG OF TEST PIT NO. 6 FIGURE ;;-;
PROJECT NAME: .daLR v .r , �Dor2te Park PROJ.NO: T-59yc� LOGGED BY: DFL
LOCATION: Renton.b'vashinaton SURFACE CONDS: 6r�sh APPROX. ELEV: N;A
DATE LOGGED: November i. 200o DEPTH TO GROUNDWATER: 9 Feet DEPTH TO CAVING: N:'A
LL
O � H
L Z �
Z
w ' CONSIS7ENCYl � w 1
� DESCRIPT�ON I a a REMARKS
� a RELATIVE DENSITY' — I r I
u < � � I, Y
� � I V
O
� I I a
i I
FILL:gray sil;y s2r.�w,:h gravel.f,ne gr2ined some �
debr�s,moist. ���o`F
I
I
I
FILL:brown to gray sandy clayey sil;with oedrocic pieces j I
to 2 feet m size,sticks,moist. A1edi�m Stiff i 15.2
i
I
c I
i
� � �
I I FILL Glue clayer silt witn small:o large bearock pieces, ��edium Stiff I f !
� smal!logs,moist to wet. i �
to St�ff 17.5 �
I
I
_ �
I
�—i � i
i
86.3
y�� B:own organic S�LT to tiberous PEAT,wet (PT) Sofl
257.1
�
Gray clayey SILT,organics,wet. i�tedium Stiff
� i
�
Test pit terminated at 14 fee1.
"5�, Heavy groundwater seepage observed at 9 feet. ,
i
�
{
�
Zn-� �
Terra
;��TE s subsurfa�e intorma'ion pertams cnly lo tn,s lest pc iucatlon an�shou�� �15SOC18t@S� �C1C.
��c���e -�lerG:etev as being ind.��a�ive of oi�`e�tcsaf,ens at i�e ste. �or.sul:ants in Geotechnical Engineering
Geclogy and
, �rcr,onmenlal Earth Sc ences
LOG OF TEST PIT NO. 7 FIGURE A-$
PROJECT NAME: Cedar River Co�;�ora;e Parn PROJ. NO: T-5995 LOGGED BY: DPL
LOCATION: Renton. W'ashin(�ton SURFACE CONDS: Brush APPROX.ELEV: N%A
DATE LOGGED: Nevember 1.200E DEPTH TO GROUNDWATER: 10 Feet DEPTH TO CAVING: N.�A
� �
`. �
� i
z
= I d DESCRlPTION CONSISTENCYI � d I REMARKS
a � RELATNE DENSITY --- w
o i N 3 Y
U
O
a
(6 inches�rown orqan�c SIL`l
,
- ' I
FiLL:brown sandy silt with gravel,lots o�weatheretl
bedrock pieces to cobble size,oid roots,sticks,moisi.
� 19.6 �
I i
hledium St�ff '
I
to Stiff
� i
i
F
I
1 �
i �
� FILL reddish-brown to blue sandy silt to clayey s�lt,large !
weathered bedrock pieces,moist to wet. Pvledium Stiff
to Sliff �
i
_ 'IG= � <5.0 i
Brown organic SILT to fiberous P_AT,sticks,small logs, �
wet. (PT) ' Solt 112.0
i i
� �
_ �
�
i Blue si!ty SAND 'ine grained,wet ?SM) A9edium Dense 25.7
Test pit?ermi�a:ed at 13 fee:.
Slight to nmoderate groundwater s�epage obsen-ed at 10
teet.
i
,��
Terra
fJ�Te 'I-�is scbs�Aace in�ormaticn perl2ins only l�t�is tes!pll localr,r an�Sno��� Assoeiates� �I1C.
no�be ir.terpre:ed as being inmca6.e of oLher locat cns at t�e site ��rscltaNs in Geotechnica Er�g nee���c
Geclegy a�tl
cn�,�iron�enta��Ear+h Sc�ences
LOG OF TEST PIT NO. 8 FIGUREA-9
PROJECT NAME: Cedar Riv2r Co��orate Park PROJ. N�: T-599C LOGGED BY: _DPL
LOCATtON: Rentor VJashinoton SURFACE CONDS: 6��sh APPROX. ELEV: N%A
DATE LOGGED: NovemSer 1.2008 DEPTH TO GROUNDWATER: 10 Feei DEP7H TO CAVING: PJr,�,
j i � 4
_ ' � � : I
= � Z ^ �
s ; LL DESCRIPTION � CONSISTENC\'� W
: a REh1ARKS
_ i a RELATNE DENSITY �
,�i� � C � Y
O ' v7 V
� O
d
(6 incnes brown organic S�.LT) �
i
i FILL bro��n sarn�y silt wi;h gravei and�veathered bedrocF;
; pieces, roots,wet.
� hledium Stifi
i to St!ff �8.1
i
�
i
I
�—
, 20.3 �
� I i
FILL bl�e clayey siit with weathered bedrock pieces,
some pieces t�3 feet in sizes,moist. � hJ!edi�m Stiff
� � to Stiff
I
_ �u �
86.8 ,
Browr organic SILT to fiberous PEAT, reots,sticks,logs, i Soft �
thin ciay seems,wet. f PT)
i
_ �
� 103A �
Blue silty clayey SAN�,fine grained,wet. (SM/ML)
Medium Dense 46.1
Tes:pit termlrated at ?5 fee! j
� Sliaht gro�ndwater seepa�e obser��ed at 10 fee,.
I
�
' i
i
2C1
Terra
N�TE T�.is sabs�rface informa:ion pe�iains only lo t��s test pil,xzticn and sbould Associates, �I1C.
noi be irterpreted as bemg indicative cf cther locatrons at lie sile Cc�s�P.an!s in GeolechoiV2i Engineerinc
Geo�ogy and
Env�ronmentat Eanh Sciences ,
SIEVE ANALYSIS ITYDROMFTFR ANALYSIS
SIZE OF OPENING IN INCHES NUMBER OF MESH PER INCH,US STAND�RD GRAIN SIZ.F IN MM
�� w(T � W � N A � � � � O � � Q d O O � � �
N � A W IJ N A� A OC N � A A O . O O O O O T A (J N W 01 A W N
��� �
rt,
_
�� � gp ---- 10
0
� �
m ` N
< � N •.t 80 20
� �n�O iiI _.
�G1�
moG)� � m
°'-� � �� � �� 30 �
m n, 7 r/}�F n Rl
�a�(.`✓ Z C �
� N N "� l)� �O �
� fll� 1l Q
� �
Ri (c) �� L D
�° � � � 5p --�- 50 m
� � CD --. _ �7
�c� • � - �
� 40 60 �
m �,
G) �
� � 30 70 -=i
Z �
o m
-� � 20 80
�J
c�o fTi'� +� - - - -
°� �� D 10 - - --- 90 ��
� �fll z
n� Z� � - - -- - --
� V (� ^1 O W N � 00 Of A W N �Oo O� A W N -• .� �OO �
Q �" 'v OO UO O O O O O O O � � A W N m p�j A �W N O O O O O O O
m DOm �
n Gf�AIN SIZE IN MILUMETERS °D °' '' `'' '"
U�� D
o O D I COARSE FINE COARSE MEOIUM FINE �
� �� � COBBLES � GRAV[L SAND FINES
� O� � Key ExploraBo� Depth USCS Description Moisture LL pL I
� � Number (ft.) Content(°/)
m
D � � 7P-1 1.5 SP SAND F,1
0
� TP-1 13 0 8M silty SANU 34 2 '
SIEVE ANnLYSIS ITYDRUMETER ANALYSIS
SIZE OF OPENING IN INCHES NUMBER OF MESH PER INCH,US STANDARD GRAIN SIZE IN MM
�"' w� ' �"� "' N A Q> O O O O O o cJ O O �p O O � �
N Qf A W N N A-• A OD N OD A A O O O O O O � d W N � OD � A W N
��� Q
�t
1-
J_
o D ,,.,,� so ,o
J �
NN �
m � -
� � � � 80 20
� `^'O su
�c>>
�� c�n � m
�� � �' � �0 3a �
�,� � � m m
cn 1°�'-N -Z-1 60 40 n
n m� 7l p
m ' z
� ic� � D
`� � � � 50 � 50 m
� n CD — %v
c° ' � �
m 40 60 � '�
m
G� �
p --{ 30 70 —=i
Z �
o m
� o zo so
c�o m� � _ __ - --
°' O� D �o __ _ - - - - so
o m z - - --
� Z� � o �oo
� �O m O O O O O O O O O� � A W N � � � l' � �� � � � p O O O O O O O O O
n �� D GRAIN SIZE IN MILLIMETERS � °' °' A w ^' �
o O D COARSE FINE COARSE MEDIUM FINE
a, �� r COBBLES GRAVEL SAND FINES
-I-.� �
�'1 �m � Exploration Depth Moisture
KPY USGS Desctiption LL PL
� D Number (fl.) Content(%)
cD �
D � � TP-2 2.0 SM-SP SAND with gravel and silt 10A
�
� � Il'-Z 14 0 SP SAND
�D 5
.aPPE1DI?i B
TI�ST PIT LOGS Bl- OTHERS
Ex-plor�tian �o. 1
C�-1 . 5 � 9ro�tin Sil �y Sar�d i�',�; �m�,��erately �ense, �am�J � fi 11 )
1,5-g.,5 Bro��n to Elue Gray Si1t with �ra��el , cobb? es & bculders
('�L) with �::casianal Hiece of r�ood ;���o�erate;y der�se ��et)
(�Fill ! t�ock is yranular
`c�eP�:ye at 8,5'.
^ 5-i3,5 3ro�:n Cryai��c 5; it (OL'r h�ii;i F��ac„r�;=rts ofi de;:ayed v;eeG &
aeye�a�i or tL1 b" s i _e.
��.�`ib.C ��d�/ �l i ty' �1f12 Sd�d t���ii l�!G�iEi 3L�?iy �Ef1�C WC�).
G�-ades fine an� less silty,
Comp;etec 3,'23i85
�a�f��1e Deptn ( ft) I':ci sture �ors tert %
11.5" 140
�xpl �ra:i cn No. 2
�-5.5 N:ixed Erorrn Silt and Gravel (f�'�-�h1; with angular �cb�les
' and boul ders. (fi 1 1 )
rhange to bl ue at 2.5` and wi th rock to 200 1 bs.
Cavirc at 4.5' .
{ Seepage at 6' . -
�
0 5.5-10 Cobb 1 es and Boul ders wi th S i 7 t,
z rock to 800 lbs, at 7'
o �ome woody debris at 8' .
a
' _0-10.5 k'ood debris, organic silt and vegetation. Terminated due
to boulders and heavy caving
Completed 3/28/75
' Sample Depth (ft) Moisture Content %
a 10' 262
a
� W
3
W NOTES:
>
� T) Depths in feet.
2} Fie7d engineer: Roger Lowe�
3) Excavation using a EXPLORATION LOGS
Ford 75.b bacichoe ATLAS GEOTECHNI�AL c F
4) Moisture content is a FROPOS�D OFFIGE/WAREHOUS:
> percentage of the sample ENGlNEERING INC.
� dry weight. PpOJECT, RENTION, WA
z
3
` PtATE 2
�
� o �...�_.� .�.
=xplcratior+ �Jo. 3
0-1+�. 5 Srown �;ra�-e'iy, Cobbly Si7t ;ML) ( fi? � ;
Ci�ance to biue-arav colcr at 2.{ '
!�eavy seepage at 7'
'water ,eve; s fi. 25' 3/28/75
� Test pit no� open � onc e ��c��ch ��c�r w�ater� level to
stabilize.
10.�-i�.� "rown Organic S� it and Silty Peat i1���i/P";� (rr�odE�rate y
soft, rnois�) (detayed ��eg�tati oni
35.5-1; Gray Silt with Qrgaric Debris (M�/Mh1 ;mc�erately firmy
wet) .
i�-18 Gerk Gray Fine Silty Sand �SM; (rnode��ately dense, wet)
:oir,pleted 3i2$/85
Semple Depth (ft) Moisture �cntent �
14 216
�
�
�
I`
1
' o
z
m
0
>
m
0
W
3
W
>
W
�
EXPLORATIOM .LOGS
ATLAS GEOTECHNICA�. pROP05ED OFfICE/WAREHOUSE
�
ENGINEERING 1NC. .;. : PRDJECT,. RENTAN, wa
;._ . ;-
.� , , , _ �_.
Z _
3
� PLATE 3
� �
�._...________-- - _____�_.�.�.�. -.---_•,.
I
�xplorcticn IJc. �:
0-3. E Brown Sandy �ilt i�''� ? with rocks S ;cbc ? es (mcderatly�
dense, damp ,'i 11 i
... 5-�.� Blue Gravel ;.nd �cL�,les rr;cde ���ely ��ense, sa�u~��ed.
( f;ll )
l��ater a� 3.� �ect, hea��y f�: ow.
!arge bouldcrs, ZOG lb+ at b' �
8.5-y 3rown Gryanic Silt ; h1L ) iinodera�e � y soft, nc�; sti
{ to�soii ) .
Q-i5 Gradationa i C}13h�(' Lc Al �err,a ting Brown Organ ic Si l t ar�d
Feat (PiH/PT;�, peat layers to 8" thicK.
1=-1; . � C�rk Gray �i1ty �and (SM) (Mo�lerately �Fnse, wet,�
;6" thic� si 1 t layer at 16.5).
,�ompleted 3/2&;85
�ar�p�e Depth ( Ft) t�io�stu��e i.onl:ent lro;
fi.5 120
10 320
'_1 153
io.5 47 �
�
I
0
z
m
G
i
I
r
0
� 3
W
� �
W
�
EX.PLORATION LOGS
I ATLAS GEOTE�HNICAL pROPOSED OfFiCEJWAREHOUSE
0
ENGINEERING INC. P�o�ECT, pEr�TON, wA
z
< PLATE 4 .
�
0
��.....�..�.��......_.� - - _.�._. ..._._..�____ .
�Xr�OrdT10!l P�'J. �
0-9 6rown Sandy Gravel ly Si it t^"�) fT�ode�-ately derse, �rcoi5t) �
tfill ' �
4�ith rock fr�gmen�s at 3 feet ,
� .^�r.�� LG ���r' �t:S .,i ���1 2� ,1�1.� (jl,'.,?i..:�l Or di. �.:i FL2`,
i
� �ioL"t''Y' dt i � S
�
1 �--_� L �rtiJ� dll� t?rd'd J1i'L" �P��� ld1Lt1 �l"�1df1:iC fi,aqrnci�;LS
S 1�,_k C�•4�, "'c�ii J�! C� nr� (CC� �..r� #1� ''{�•�!'.t' f)f S� � T: iik::iC Y'-
� a��;�l,� den,sc, �•ret) - -
� i�-1 �c1"�: Gray ��f'��, Ulil ��'1(j � S!' � lK1 C i d i,Y'i?C.P. i'.� S I i j:
i:moderately dense, weii .
'_n�' ,:�es �r,_y �i l t l;ye�s (�'.L) �nederat2ly `irm, ;�:�t) an�
�r�ces vf or��anic ���terial be�o�� 15 ;eet.
�
�>:Gloration ±�e. b
0-7 Brc��n Sandy ane Gravelly Si7t �'��) w�th rcck fr�:�men�ts �
;�noderately firm, moist) ;fili) �
� J
� � ro��:y at a' . y
� ,
' � 7-b Brcken rock (f911 ). �'
� ]
�
� 8-9 Oreanic material at 8' . �
�
� 9-1D,5 Brown Peet (�T) (modera�ely firrr, saturated; �6�;:��r Sil t �
� �ML) (moderately firm, saturated) ?
�
,
= 1C.5-12 Brown Fea�t (r7) (moderately finn, saturated!
�
. ,
i2-17 Gray Silt (ML) (mederate?y firm, saturated; ;
wi th occasi ona 1 1 ayers of pea t a t 13,5'.
Completed ?/2�/c5 `
�
m Ssmple Depth ( ft'r i;��sture Content � �
o II 236 Q
y
3 �
> �
� �
�
— k
. ! EXPLORAT�I:Of� '�.a.GS a
- ' ATLAS GEOTECHf��CAL P��PQSED ������/w��FHous� . i
� �NGINEERING I(�C. Ppo�E�T, :�u��oN, 'w�A
�
z �
� { -- P L A 7 E 5 .�._.�...�...t..m.�
��� p �....,._.�.�...�__— ..��-�� +. �..�,��
�e;�l crari Cn tJo, -
.-�. 5 6rc�wn ^'�e�i�.:m Sar.d t�P;� wi th si " t �mc�derate�y d�nse, damp)
Sfil" )
_. _-, Grotvn S; 1 tti� Gra��el (�;'�; (dense damY)
;,�an.ge te bl ue �t 6'. 4dater flowino ir: at 5'
� , -;� � I Ut �UCKV i i i I l ti2ii:�. ;'�c; .. � � y:.� Il; i �
' � �
j '3� o~ :�'_��v-.,,. :;� ,'� = �
�`
I �_o p+^.��,,n ilrn�ni� C11t (pSH �� ii��.".�2Y'3tF�y {li'fT,, Sc:UI"d�E�; �
' - 5 L�'aC7d L1 �",� i � �a: �c .. . i0w -, rEc � . "-� t �_c�5 �E� ` �T � II
' _`. c3ZU�a�c� l^ ' �
. � �_:6 G� k B' .:e Gra�, '�^ .., '� s� ,
_�. � cY i ��iEt�l.1fP �3(1� .,, -J�;; w'1 .,:� � �t
Complet2� 3l28/S5
�ample Gepth ift) ��"cist�re Cor.tent p
8 �'
a,
�X.^�:, - -i�i� �YC. v
C-2.� Brown �ilty Sand (SN�i with rocts (mcde�ately d��nse, :�ois�)
(�ill )
�,sphalt chun}: from 2. 5 to 3.5'
', � , 2.5-�.5 E1 ue-Gray Gravel l y Si l t (��'�L) wi th rock fragmen ts (der.se
moist) (filll
� 3. 5-9 Brown si 1 t (P9!? wi th occasi onal rocks and fragments of
l c vegetation. ( fill )
z
m �-9.j 6iack Orga�ic P�at
� o
�
9,5-14.5 6rcwn Feat (PT;
Seepage at 12` grades with silt belew 12.
j 14,5-?a. 5 uradat'ona i change to Gray Si 1 t (�•1L) tir�h scr�e o�;a�ic
� , f debr�s, (moderately dense, saturate�)
� I Trace of sar�d at i6.5.
- o Terminated at 15.5' due to oCstructions that limited
' o excavation.
� 3 r��pleted 312�/85
>
�,
�
�
EX.PLOP.ATION LCGS
ATLAS GCCTECHNICAL pROPOSED OFFIC�JWAREHGUSE
o ENG{NEERING INC. pR��ECT, P.ENT��N, WA
Z
3
` PLATE 6
, �
� � —
Exploraticn Wc. ?
0-3 Br-own San�y 5ilt (ML) ; fiil ;
��-4.5 61 ue Rocky Fi 1 1 (very dense) I�.a�,d di yai na.
?. 5-9 Silty Sa�c�y Gravel (41�') (ver; dens�, �.�etJ ; fil ? 1
� � ..,..,. .. .. ,.,.. �. i�:...�r _.: -- - _ _ , .�_ i
� li(`�-IC S L l) 1� � I L C q Lr / , . �
� ?E�'y' !:3i�: :J':•;'_lr.:j ��': ;n�
�: �
� S.dl)�Q VCU1�i � �ll O u i G�ilt�Ci' �'
� i
� �-14. 5 �,-",� -_�� =T1 _ -;- =; � _ .--���_.� u����� ;;��, s;t�, _���' ?
e
i4.5-17 Gr��a" o�a i cl-,anae �o i���� x.ed ?eat ar,� Gray �i i z ;FI,'r��Ni
?.fi rm s��ura�e�; �
1--12 Gr�; Si1t ..�'H ' , t1�� ._ -_-��i� � ->_grer'�. �.�,cG_ra�� _ ri���r-�, :
sa�ura tec 1
Co�npleted 3:'�9.'E5
Sar�ple Depth ( ft1 P':o+sture C��rtent %
'_0 1C'_
lI :E�
1�.5 1�;
�7 54
_ �
, o
• z
m
0
' , � . -,
�
, , —
�
�
� I
�-
m
e
W �
3 I W
�
W
OC
' �
EYFLORAT?GPJ LOGS
ATLAS GEOTECHNlCAL PROPOSED OFFiCE/WAREHOUSE
ENGINEEqING INC. PRo�ECT, REtJ�OtJ, Wa
. T
m
Z
3
_ ; PLkTE 7
�
tw.��0''.,^_t� Cfi '`i�. lll
0-h Brewn Sandy �raveli_; Silt ;t-1'_) ider_e, noist: rcc�s to i�"
'tfill )
Chanoe tc b�ue at � �
Seepage and sor�e c��,�i� at �,'
;,_q � _�. '- -:'.
1 .. �.1;�. \i 1� i .� .. 1 L1. .l i � . ;
� `_��:'�C�"�at�7❑ 'f I^'��E'0� �C'J�_. _ l,C� . _, �
i V�ge�a�i on �,:� �. �
� s
� 7-_, . J .�,. J Ci-�r_ ^.ro„nl �'=D � !m(}.�cYa���y �1Pf1S('. S�tuY0.LCd , j
1 �
i c.G-_;1.� �:t'C'?v'fl F'c'cL clr;J J'. � L tF' i ; I'I�i / �
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14. 5-16 Sray Fine Gravei (GP) (moderate'y dens�, sat�.:ra`ed1 �
i5-1'.5 �',ixed �eat ard Silt with Peat fPT/^�N;
.; . 5-iR Dark Gray Si1ty Sanc (S�"; (moCerately dense, �ret�
rompleted ?!29/8�
Sa�;:le Depth (Tt) Moisture Content �
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:1 133
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ATLAS GEOTECHNICAL PROP05E�J OrFICE/WAREHOUSE
y ENGINEERING INC. �P��ECS, RENTQ�1, k'A
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Compi e-ted 3i�2S%85
Sarrple Gepth � fti P4oi sture Conte��t % _
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iQ. S 253
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EXPLORATICN LOGS
ATLAS GEOTECHNICAL _PPOPosFo oFF�cE/Wp,REHO'JSE
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ENGINEERING INC. PRo�ECT, RENTON, WA
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Explora�?cr P�c. 12
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i��. 5-1i.5 Gray silt (N,L) ;m�derately dense, satur�ted;� �
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1�-:5.5 Gr�ay S;1 t ih'L i (mecerattly dense, saturated; �
15, 5-'_6. � Gark uray Sand (�P' (��1ode�ate��y �ense, saturate�;�
Com�leted •%�4/g5
', Exploration No, A
' 0-5. 5 Brown t•lediu�n Sar,d (SP) (moderate'y dense - icose, moist)
(fill ) (caving)
!, Vegetaticn mat at o.5,
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� �oTpleted 3/29/85
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- � EaPL�RATION LOGS
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ATLAS GECTECHN:CAL P�QPOSEO OFFICt/k�AP.�H�USE
r
ENGINEERING lNC. oRc��1ECT, PE'�To^�, t,�A
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- -�- - TERR�► ASSC)CIATES, In�.
ConsultaMs in Geotechnical En�ineerir.g, Geulo�y
ind
[nv ranrr.ental �a�ti, Sc��nces
February 22,20Q7
Projec'No.T-5496
� 1��r. Mui-phy:�IcCu]tough
TARRAGON
]004 Secand A�enue, Suite 32fl0
- Seattle,Washingion 9810�#
, Subject: Geolechnical Report Adcendum
� Cedar Iv�er Corporate Park
Renton,`Nasliington
Reference: Geotechnical Repori,Cedar itiver Corporate Park,�Zenton, Vl4'ashington,Yroject No. T-5996,
prepared by Te3•ra Associatec, Inc., dated Decernber 7, 200b
Dear Mr.McCultough:
As we understand, design buildir�g eJevations f'or the subject project have Uee�-. revised since compietion of the
referenced geotechnieal report. The revised builcing ele�ahions will require the existing site �rades be raisec four
[o five feet by placement of fill material.
Raisin� site grades as planned is geotechnica'ly fea�ible and wi11 acb�al[y eliminate the need to implement a
surcharge pro��arn to mitigate differential building settlements as recommended•� in the referenced report.
Consicering the thic{mess of the fii] material, it is also our opinion that stripping of ihe near-surface topsoil layer
�vill not oe necessary prior to fill placement. We recommend that the site be cleared and grubbed with su-face
vegetation sh•ipped and removed; however, the renioval of tlie reninant topsoil �vil) not be necessary. 1'�'e
i
recommend tl�at the surtace oe tilled and reconpacted to a firm and sfable condition prior to fill pla:;ement. I
Placement of new fill material to achieve revised construction 6�rades wi�l consofidate or compress the peat and ;
soft alluvium ti�at underlies the existir.g fill at depths of eight to ten feet below current site grades. ��/e �
recommend that placement of the fill material be treated as a preload and that the consolidation settlements be '
allowed to occur prior to building conshuction. Tl;is approach is similar to the surcharge recommendations
presented in the referenced geotechnical report wtth the exception that the fill rnaterial must be p:aced and
campacted sh�uctural[y to pro�ide sui:abie support for buiIding foundations, fioors,and site pavemen[s. Estimated ;
total settlemer.t unde,the weight of tliis four to five feet of fiil material falls in the range of four to six inches w�ith
�
time of consofidation extending for approximately three to four weeks. ',
�
�
- i 2525 Willows Road, Suite 1 D1, Kirkland, Washington 98034 � I
�.
Phane (4251 ii23-7777 • �ax (425) 8�i-4334 �°' „_,
I�lr. �furphy �1cCullau�h
Fcbr�z:ti' 2?. 24G7
bVith stte fill placed and compacted s[nich:ra.ly as recorr:mended in the referenced geotechr.ical report, suitable
support ror standard spread footing foundatians would be provided usin� foundation design parameters as
outliaed in Section 5.4 of the geotechnical report. �'ith the preload program implemented, estimated totai
- focndat�on settlement :alls in the range of 1 to I % inches�vitll dif.`erenrial setticrrent of one-half to �h��ee-c�uzr,er�
inches.
Ail other geotechnica[ en�ineering recanur:endations outlinec in the referenced ;ept�rt not a:nended 'ov this letkcr
continue to remain valid for this project.
V4re the'.rust the inform�':�,on �,rese�nted;is_sufficsent to meet yoGr current n�eds. Sl�ould you ha�•e any c�uestions o-
require adc�itiona! info�t �I�'S�s���
.. � ���,,
� �, ..
Sincerely youcs, i;,r�?���aR ., ��.�� �.
T�1 SSOCI�A� S, '� `
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T}�eo re J. Sche��� 4 �� ��,"
Principa] �,._ a
�'�rc1n
��: Mr. J�"���n,�����o
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Project�o.T-599G
Page No. ii
� - ,
APPENDIX F
-� Wetland Analysis
�ie�ar�d Ar�al�sls. S�rearr� Glassl�ca�ion and S�orelir�e Mas�er �rogr�rr� ApplTcablll�u repor�
�00 S.160T'� S`�E�T
Ced�r River Gorpora�e P�rk
� �cr��e'. �: 33�0400285�302305908�
R�h�TON.WASNrNGTO'�
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.�
Mwph�I�-Gu!'.augr,
Tm�ragon Deve?op;�er�
� 1�Ci0 Secon�A�r��,�;«-
Sui�e 3?���
Seattle.�!A 981i��
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�g���.� ���s� '�
[ � Oe ) 5 � 8 - 7776 '
�s@is8.cosa
Decel�ber??.?006
;able of con�e��,s
��Gii�1ti��SOM�;�?Y--...------�---------�--..................-----��--�--......_....-----._.._..----��---------�-----�----��-------.....................---------------------�------------��---.........3
SI1'E D�CR?.�I'ION--�---�--��------�--�-------------------�------........--------------------------�---�--�--�--��---------�---�--...._..--�--.....----.....----�---------------------------...._......-�--�--�------�
4��'��A.NU 9ELt�LhTION.......................--�---...._............-�---........----..__...._.._............---�--��--�--�---�-----�---�------------------._......................----------�-----------....4
�. - �-
T•r
q2tAL,t1.l
�c, ....-•.......................................---•-•-------•--�--��---..........._..........----�--�---.._._..............----...........------.._-��--�---�--.......-�-------------•---�--------....
�
�li S------......_............................._...._..............--------------------.................._..._..-�-�-�---�--...-----.....--...--�------....._......................... �
-----�--� - ��
'i,�drology..........-�-�-�-�-�------�---�-�---�-�-�.............................�---�-��---......-�-�---...._..-�-�------------�--...-�-�-�--�-�-�-�-�---�-�---�---....._.........---��------------..............5
�;�;i a�iD CP,TEGORIZATION..--�--�--�.....................................................................�--------�--------------._._...._......_........_............._..---------------------...........3
��;;�P.?�DE��ILATION RESl7�i'S-�------------------�------....-�----...-�--�--------��-�----._.....................__...------------------------------�----..__........._._...._.._.....--------�-�----6
- ';�ge�tTon........................... �--._...................-�---............-----��-�-�----..........._._._....---�--................----..-�---------�--�----------�---...-�-�----�-�-�----�---..........i
;�nils..........................�-�---...................-----�-----�----......._......-�---��---��--�-�-�--�-�---.......---�-�-�-�---�-�-�-�---�---.....-�------._....._......-------�--�-----�-----------------�----i
-�d^��li�q� 8
: � -�-�-�----�-�-�-�-�..............�---�--------........_..............--��--�-�---�-�---�----�-----�--- -�-----.........-�-�--�---�-�-�-�-�--........._..-�-�-----�-��-�-�-�--�-��--�---�---�---�---�---�-
�,r,i.����DE'�R.MI�IA1?(1N�CLASSIFTGA,1?ON..............�---..--...----..................-�----------------------�- �-----8
-�------�---�-------------��----.......-�-�-�--------------........---..
b���l�nd r,--�-�-�-�--�-�-�-�-�-�----�---�-�---�-�----�-�---�-��........................�--�-�-�-��-----..........._.._._......--�-�-�-��--._._._........_......................._....._....... ..._._._........._.......8
� 'v���lcnd 8---�--�--��.................-�
-�-�--------��.................�--�--------------�-�----...._...---�-�------...-�-�-�-�-�-�----------------�---------��---........---�---.......--�-�-�-�----�---------�
;':�.=,F M DETERMINP,T!0�1�CLASSIFTGAiION---------------------�------------------�------�- -------------..........9
...................................................................�---------�-
SH6RELII�E MAS°PER DROGRM1................................................�--------------�-----.._..-------------------------------�--......._....._............---------------�---------------�--.._.._...9
p�GiiLATORY 1MP!�IGATIONS.......---------.............................._..._.................................---------------------------------------.._...............--�-------------------------�--..9
�
� :l��lan��.-----�--�---�-�----------------��---�--�-�---....._._.........-�-�-- ---�--......_........._..-----------�---�-----�-�--�-----------�-�---.... 5
................�-�--------��-�---�-�-------------- �
,�rer�m� '
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Pa�e ?
I
Exec���ve S�r��ru
This report presents the findings of a wetland analysis, stream characterization and
applicability of Shoreline Consen-ancy provisions that was performed by VVPS on the
Seelig Lind Avenue property. Two wetlands �ere 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 south and east as well as the southern
boundarv of the wetland to the north were delineated.
ST�Descr�p�on
The 12.57-acre site, Parcels 3340400285 & 30?3059083, is located between Lind Avenue
South and East Valle�- Road, south of SW 19�' Street in Renton, Washington. SW 21S`
Street is located to the north and SV�' 23rd Street to the south: however, both of these
street ROWs have been abandoned (Figure� 1, Vicinity� Map). The site is currently
undeveloped. A fire station is located north of the north«�est property corner (Parcel
#334040042�), a commercial development is located to the east bet�-een 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 � 30230�9083). The parcel is nearly
rectangular, ���ith a`'panhandle" at the northeast corner.
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Ftgrr.e]:Vicini�y Nap
7�he 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
PaRe �
narro�i band around the entire site are forested. The interior of the site is mostl� scrubbv:
tree spe.cies have generally not reached 20 feet or greater. Tw�o mapped «�etlands nearly
surround the site; a large �vetland lies to the north and a smaller«etland ���raps around the
east and south property boundar-y. These wetlands have been included in numerous
previous inventories, including the City of Renton's Rivers, Streams & Vl'etlands
inventory. An unnamed tributary of Springbrook Creek is located on the adjacent parcel
to the south, south of the abandoned SVti' ?3rd Street ROW. �,
�1e�l�nd Del_inea�Tor� 'I'
Site visits occurred on August 2�, September 23, and November 7, 2004, wherein CBWE.
examined the study area for indicators of���etlands. 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 hydrophy-tic vegetation, hydric
soil; and wetland hydrology using the me�thod outlined in the 1997 Washirzgton State
i���"etlands Identification and Delineation .-'��anual (Washington State Manual), and
follo�i�ing City of Renton regulations. The "routine on-site determination method" «-as
used to make the «�etlands determination. The routine method is used for areas equal to
or less than five acres in size, or far larger areas with 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 compile.d on preformatted
�� etland Data Sheets, labeled DPl through DP12.
�;2ge�a�cIOn
Vegetation was e�7aluated across the study area to determine the presence of hydroph��tic
plant communities. Plant communities are considered hydroph5�tic when more than �0
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 National List of Plant Species That Occur in
1���'etlands, Region 9 — Nof-thwest (Reed. 1993 and 1988). The indicator codes for plant
species are noted in Table 1.
Dominant species ��ere recorded as species comprising more than 20 percent of the plant
community in each stratum (tree. shrub, and�or herb layer).
TABLE 1. PL.A',`T II�DICATOR CODES
Indicator Code Frequency of Occurrence in �
Wetlands
; Obligate Wetland (OBLj—occur almost ahvavs in ���etlands >99°%
Facultative Wetland(FACW*)—usually occur in wetlands 67-99°ro
Facultative (FAC*) — equally likely to occur in wetlands or 34-66%
� non-wetlands
I Facultative L'pland(FACli*)—usually occur in non-wetlands 1-34%
Pace 4 ,
Oblieate Upland(UPL)—occur almost always in non-wetlands <1°�o
� 1�ot Listed (NL)—no indicator status ---
* hote: 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(-).
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 belo��-
ground surface (BGS). Soils textures ���ere characterized using Natural Resources
Conservation Service protocol, and examined for hydric indicators as described by the
Washington State Manual. Soil colors were identified using a Munsell soil color chart
(Kollmargen Corporation, 1988). Depth of soil saturation v��as recorded for each data
point. Wetland Data Sheets are included in Appendi�: 1.
Several secondary data points w�ere e�amined across the wetland:'upland boundary in
order to determine the boundary line, although data forms were not completed at the
secondar�� data points. The secondary data points were used to eaamine similarities or
differences in soils betw�een major data points and to establish mapped soil unit
boundaries.
!iydr'ology
At each data point, observations of direct and indirect wetland 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 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.
W�TLAN�CAT�GORI�ATION
VJetlands 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 «�etlands 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) Wetlands having forty percent (40%) to sixty percent (60%) permanent open
«ater (in dispersed patches or other�rise) with two (2) or more vegetation classes;
and,-'or
Pa�e �
(c) Wetlands e�qual to or greater than te.n (10) acres in size and having t}lree (��► or
more vegetation classes, one of���hich is open w�ater; andior
(d) The presence of plant associations of infrequent occurrence; or at tlle
geographic limits of their occurrence; and,-or
ii. Category 2: Category 2 wetlands are wetlands which meet one or more of the
follo��in� 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 Cate�ory 1
wetlands; and�'or
(c) Wetlands of an�� size located at the head�caters of a ���atercourse, i.e., a ���etland
with a pe.rennial or seasonal outflow channel, but «-ith no defined influent
channel, but are not Category 1 wetlands; and%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 w�etlands are wetlands «�hich meet one or more of the
follo��-ing criteria:
(a} Wetlands that are severely disturbed. Severely disturbed wetlands are �i etlands
��hich meet the following criteria:
(1) Are characterized by hydrologic isolation, human-related hydrologic ,
alterations such as diking, ditching, channe�lization andlar outlet '�
modification; and
(2) Have soils alterations such as the presence of fill, soil removal andior
compaction of soils; and
(3)May have altered vegetation.
(b j W etlands that are newly emerging. Newly emerging wetlands are:
(1) Wetlands occurring on top of fill materials; and
(2) Characterized by emergent vegetation, lo��� 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 w�etlands.
�i�'i Lr��'ir� r��'�I1�EATIOPd RES(i�TS
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 Vvetland B. A summary of the vegetation, soils, and hydrology
observed in the ���etlands and the on-site upland is presented belo«�.
Pase 6
ti'ege�u�ion
The central areas of the site represented by DPs 1, 5, 10, and 12 are dominated b}- young
black cottonwood (Populus balsamifera), «�ith a dense understory of Douglas spirea
(Spiraea douglasii) and scattered Oregon ash (Fra�inus latifolia) saplings. Cottonwoods
at DP � w-ere sapling rather than young trees and this central area of the site was opener,
supporting primarily herbaceous species. Other species gro�i ing on the fill material in
occasionally dominant cover include red-osier dogwood (Cornus stolonirera), Himalayan
blackbem� (Ruhus procerus), snow•berry (Svmpho�-ica�pos alba), goldenrod (Solidago
canadensis), tansy (Tanacetum vulgar�e), vvestern St. John's wort (Hypericinn radicaza),
Scouler's willow (Salix scouleriana}, and swordfern (Polystichum muniturn).
DP 3 represents the. southern edge of��'etland A. it is dominated by Hooker's willow (S.
hookeriana) and Douglas spirea; trace cover of each of the following species is also
present: cattail (Tipha latifolia); Pacific willow (S. lasiandra), Scouler's willow, reed
canarygrass (Phalaris arurzdinaceae}, slough sedge (Carex obnupta), and sapling Oregon
ash. The majority of V4'etland A is dominated by reed canarygrass, yellow flag (Iris
pseudacorus), deadl�� nightshade (Solanurn dulcamara), black ri��inbem' (Lonicera
involucrata) and �arious ���illows.
DP 8 represents Vl�'etland B. Pacific and Scouler's willows and red-osier dogwood co-
dominate. Douglas spirea and reed canary-grass are also present and occasionally
dominant.
The forested fill banks of Wetland A are represented by DPs ? and 4. Red alder (.Alnus
rubra), black cottonwood, red-osier dog���ood, stink currant (Ribes bracteosum), and
Himalayan blackbem� are all variously dominant. DP 11 represents the forested area
adjacent to the north end of Wetland B where black cotton���ood dominates in the
overston-, red-osier dogv��ood dominates and Himalayan blackbem- 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 (Cer•astium arvense) co-dominate within the abandoned SW
23`d Street ROW.
Soils
Much of the site ��as 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 Survey of King County Area as Puget silty clay loam to the
«est, and Snohomish silt loam tow�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 poorh� 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-bro�r�n (2.5Y 4i2) and grayish-brown (2.SY 5%2)
silty 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 water
table is at or near the surface.
Pa�e 7
. II
, I
The Snohomish series is a nearl}- level hydr�c series made up of poorl� drained soils that
formed in alluvium in stream valle��s. The A (or surface) horizon ranges from very dark
grayish-brown (lOYR 3l2) to gravish bro��-n (�.SY 5/2) silt loam, and is mottled to the �
surface. The B (subsurface) horizon ranges from very dark grayish bro«-n to gray and ,
from silt loam to silty clay loam and loamy sand. Depth to layers of peaty material �
ranges from l3 to 36 inches. Lavers of silty clay loam to loamy sand occur ��-ithin and
below the peaty laye.rs. Permeability is moderate in the upper part of the profile and
moderately rapid in the lower part. There is a seasonal high water table at or near the
surface. �
As noted above, on-site soils do not match these mapped soils because the site v��as filled
prior to 1970. Four data points, DP 1, �, 10 and l2, ���ere established on the filled area.
The soil �;as very compacted and impermeable at all DPs. Soil chroma is 3; mottling «-as
present at DPl within the surface l2 inches.
Soil within adjacent wetlands at DPs 3 and 8 generally matched the mapped series.
!�ydro'.og�
V�'etland 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.
WEi'!A�+@ DET�RMI��ATIO?d�CLASSI�ICAT10��
Based upon presence of the three requisite criteria, �-etlands nearly surround the site on
three sides. The wetland to the north, Wetland A, is an approximately 12.3 acre scrub-
shrub/emergent wetland; Wetland A does not extend onto the subject property. V4'etland
B, to the south and east, is a 0.6133 acre (26;714 square feet) L-shaped remnant scrub-
shrub wetland surrounded bti 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�l�nd A
Wetland A has been designated CategortiT 2 by the City of Renton. However, this wetland
could be considered severely disturbed due to hydrologic isolation and ditching (along
the southern boundary), «�hich are characteristics of Category 3 wetlands.
Wetland A does not meet the criteria for Category ] for the following reasons:
� Criteria a: There are no listed species;
Criteria b and c: There is no open ���ater;
Criteria d: There are no plant associations of infrequent occurrence. The wetland
, is dominated by reed canarygrass, }'ellow flag (Iris pseudacorus), deadly
nightshade (Solanum dulcamara), black t«-inberry (Lonicera involucrata} and
various willows.
On the whole, however, Wetland A meets the criteria as a Category 2 wetland.
, -
' Page 8
Wef1Qr!d 5
«'etland B meets the criteria as Category 3 on the basis of human-related hydrologic
alterations such as diking, ditching, c�hannelization andior outlet modification; soils
alterations such as the presence of fill, soil removal and%or compaction of soils; and
altered vegetation.
ST�EAM D�T�R.h��NAI'ION€C�ASSIFICATION
An unnamed tributary- of the Springbrook Creek is located off-site approximately 1�0 feet
south of the south propert�- line of the subject propert}'. The stream is included on the
King Count} GIS Assessor's maps and is identified in �'DFV�' SalmonScape as
documented habitat for Coho salmon. Per RMC Title IV, Section 3.L.l.a., Class 2 «�aters
are perennial or intermittent salmonid-bearing �i�aters w�hich meet one or more of the
followin� criteria:
(a) Mapped on Figure Q4, Renton Water Class Map, as Class 2; and,`or
(b} Historically and,-'or currently l:nown 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 t«�enty (20)
acres in size.
Buffers for Class 2 streams are 100-feet from the ordinary high v�-ater mark (OHWM); the
OHWM of the subject stream lies greater than 100-feet south of the northern boundary of I
the Class 3 wetland buffer so the stream buffer does not affect site development.
S}i0RE1,��E MAS1�R pROGRAM
Title N Section 3.090 G. designates three Shoreline environments, �'�'atural,
Consen�ancy, and Ur•ban, to provide a uniform basis to apply policies and use regulations
�i-ithin distinctively 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 «�ould
be Environmental Effects. Such affects include pollution and Ecological Disruption, i.e.
potential effects on w�ater 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 «�hich 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.
�EG�LATORY IMP�tCATIO)�iS
We�!�nds
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 (Wetland B) are protected with
2�-foot buffers.
Page 9
�
Title 4, Chapter 3.O�O.C.� (Specific Exe.mptions — Critical Areas and Buffers), allo��-s
discharges to ��etlands and construction of bios��ales in ��etland buffers as described
belo��:
i. New Surface VVater Discharges: Ne��� surface �i ater discharges to �;�etland
Categories 1, 2 and 3, or buffers of Categories 1, 2 and �, and to streams or lakes
from detention facilities, presettlement ponds or other surface water management
structures; provided, the discharge meets the requirements of the Storm and
Surface ��'ater Drainage Regulations (RMC 4-6-030); �;�ill not result in significant �
adverse changes in the water temperature or chemical characteristics of the
���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 ��-ould
result in equal or improved wetland or stream%lake functions and values. Vvhere
differences exist between these regulations and RMC 4-6-�30, these regulations
���ill take precedence.
ii. Storm���ater Management Facilities in Buffe.r: Storm«�ater 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
topograph�- requires their location �i ithin the buffer to allow hydraulic function,
provided 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 ben�-een the critical area and sunounding activities. For ,
Habitat Conservation Areas, this exemption applies only to Category 1 ���etlands.
Stormwater management facilities located in wetland buffers shall require buffer
enhancement or buffe.r 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 VVetlands 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 ]ocation of proposed biosu�ale, Wetland A.
� ;�'� ' ,�.
,.: � ,�;"
�— �
� '� � i: .. t '� � ,�
�: � � � � � � ��
4 VYi}. � t �� � _
�' ...T'�Tf _ Yi
!' j.%
.T � � '
-},
Page 10
Photograph 2: Forested buffer at location of proposed bios«�ale, Wetland B. Note the
wetland boundar� (standing�;�ater) at the bottom right of this photograph.
�� ,;,� � �, - � _�_ - ,� t
' � r7 �� `/• 1 ��.
� s '�, � � � �`;
� � .�����
� � �-; �'
Y aF
ti - t S �,g�� ,
- } :/ Y��'� �
��, r -.� , f �:. �.
p ..�
.k � :c;Y't.-:. t i
n^ - ��'t _ :�4'?- i
:-:n _
i.� � � �i �
As can be seen from these photographs, the buffer at both Wetlands A and B are
dominated by black cottonwood at the location of the proposed bioswales.
Si"eQ171S
The stream located south of the SW 23rd Street ROV�' 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.
Sraare':ir�e Conser��no�
I�o impacts to a Shoreline Conservancy 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��-ithin the buffer of Wetland A and a total of
�,979 square feet within the Wetland B buffer will be impacted to construct the proposed
bio-filtration swales.
G�ncep�ual Br�ffer Enh�ncemen�P�an
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 v�-estern red cedar, within the approximately
35,000 square feet of onsite buffer lying outside of the proposed bioswales associated
�i 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 with few trees to
enhance survivorship. The number of trees that «�ill be planted is disproportionately great
Paae 1 1
compared to the area of proposed impacts; attrition is expected due to the impracticabilit}'
of irrigation or other maintenance activities. Planting will occur in November to enhance
survivorship. No monitorin� of the plantings is practicable nor appropriate; it is
anticipated that even if survivorship of as little as 30°o of the total trees planted occurs,
these trees v��ill ultimately compensate for the total �,706 square feet of buffer impact
area.
��� i
_ ,
; _�
_ l
I
Page l2
RE�RENCES
Hitchcock, C.L., and A. Cronquist. 1973. Flora of the Pacific Northwest. Univ. of
Washington Press, Seattle.
King Count}� Planning Division. 1986. King Count}� �'etlands lnventory Notebook,
Volume 2 East.
King County, VVashinaton. Sensitive Areas Map Folio, December, 1990.
Metro King County We�bsite. G1S Center.
����ti�w5.metrokc.goviservleticom.esri.esrimap.Esrimap?ServiceName=overview&
Client....
Microsoft TerraSen-er lmager}-. http::'-'teiraserver.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(?4).
244 p. 1993 North��est Supplement, Region 9, December 1993.
Sn�der, D.E., P.S. Gale, and R.F. Pringle. 1973. Soil Surve}' of King County Area,
Washington. U.S. Soil Conservation Service, Washington, D.C.
Soil Conservation Service. 1985. Hydric Soils of the State of Washington. U.S. Soil I
Conservation Service, V4'ashington, 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 Wildlife Service. 1993. Northwest Supplement to National List of Plant
Species that Occur in Wetlands: Region 9. Biol. Rpt. 88(24).
�l'ashin`ton State Department of Ecology. 2004. Revised Washington State Wetlands
Identification and Delineation Manual. Ecology Publication #04-06-025.
�'�'ashin�ton State Department of Fish and Wildlife SalmonScape.
http: �«df���.�����.��o�� m,���E,inn�:alm��n�caj�e indr�.hti»1
Pa�e 1�
�.�pEl��rx 1_ ��
Gy��!P!�r� r�����NI?�IP:;IOT���pTp_�Op��S
Pa�� ��
€
D,aT� FOR�I 1 (Revised)
Routine �Yetland Determination
i«a State «�etland Delineation Manual or
148 i Co s �t-e2lund De[ineation ?�4anual?
Prviec:,'Siic: � Caic:
�rh � �� � ���5 � ','-�-
, ,..,
1 /
AppliranUov.�_r: , ` County: ,�
� -2-��.•-� �.(y�-�
�ta�e:
i��,•sti�_�torl_', ('.'i�� �-C,.� SIT';R: ��'- 1
J Do !�c�rr,�al Cirumstancc� tzist on thc sitc° �ts no Communit� ID: , .
' Is chc si�e si�nificanti�•disturrd (at�pical situacion�' �ts no .\ Tr�n�ec: iD; �--� _, ,.
Ls chc arca a potcmial Problcm Arca° ��rs no 1 � � , Pioi ID: l....��— 1
Ez�lanatior. o`an� ical or roblcrn arca: ��a_ �L�/ i✓
�'EGETATIQti (For strata. indicate T=vet: S =shrub: H =htrb:V =vine)
Dominant Plan; S�eci�s Stratum 4r co�cr In�icacor pominant Plant Sac�ics S�r:.wm 4� co�er Indicator
„�-a�..�-- � �� ��=-- I
�-r�-� �.�z..',� c ;�, �
� �^ r� I J f i� ��'^����
1�� i I
{
{
H1'DROPEiI'TIC �'EGETATIOti I\DICaTORS: •
�'.:o,`dominanu OBL.FAC�',� F.�C�
Check all indi:ators �hat app'�• R t�pl5in beio•�` �
Visua! obsen-ation of plant socri�s�ro���in� ir. Ph�•siolo�icallreproducci�•e adaptations
are�c of prolon�ed inundacion/:amr�tion �l�t[land plant da;a6ase
hSo:pholo�ical adaptations Personal knowled=e of re�ional p;an[commur.ities ,
Tr.hnical Li�entur^ Othcr(tt lain?
Hrdroph�rtic vegetation gresent' n-es no
Rationalc for dccisionlRcmari:s:
H1�ROLOG�' - .
is it thr grok-inQ se.son'. �e� no V�'a[er Mar►s: ves no Stdimznt Dtposits: yes no
, o� .
a�scd on: �`��-=soil �zmp Irecord tcmp ) Drift Lincs: ��es o Drain�_e P;,cterns: �•es no �
o[htr fcxplain)
Dept,of inunc�tion: --�inches Oxidized Root(li��c ro��� Local Soil Sur�e}�: yes tto�
��/ Channels<12 in. ��es i ho
Dcp�h to frce a•ater inpiT: `- inches ��;f�i�;%- � rAC Neutral: yes � VJatzr-staintd L,eaees y�s o
.. th to saturaced soil: �--`�'in:hes
Check a!1 that apply &explain belou�: Other tezplain):
SuLam,Lake or ga=e data:
Aerial hotQsra hs: Other:
Wet�and h��droiog}� present? �•es no ,�
- • ,
Ra:ionale for dccision/Rzmarks_ `�
SOILS
Map Uni� '�ame Draina�e Ci:�ss
(Scrics � Phase}
Fie1d obse�•a�ions confirrr: Y'e� �;o
TaConom�� f sub�rou ) ma �d tv �"'
Profile Description I
I3�pth yorizon Matrix color '�lottfe color� �fottlz abundance Texiure,concretion�, Dr���in_ of.oil
tin:hes) (.Munsell (Mun�el( size 8_ c�ntrast structure,etc. profiVt
mois[} maist) (match d�scri�tion)
�" ,� � / - �3� 1 - -- �
� ���`��►,�--�y , ,
�`" �-- •,� .� / � , `�' ., c-� o �'
� �3 �� � ,F �. �G r� + ,��..�./w�
� J � ' `� �� ��-�.
� _��
-�
��-�/.� � � ��lr; -- � , ;,�,�.( f�---
� �
,� � r . ' i/
11'�i�1. . �-�'.� ,,t,c_.-�-f�-- �I-�} �- r'';�� .
� r, ;'
, r - ,/
t
H�•dric Soil Indicators: (check all that appiy i
Histosoi Matrix chroma _< ? with mottles
Hisuc Epipcd�n Mg or Fz Concretions
Sulfidic Odor Hish Or�anic Content in Surfacc La��er of Sand�� Soils
Aquic Moisture Re�im= Or�anic Strzakins in Sand;• Soits
Re�ucine Condicions Listed on \ationaULocal H�drit Soils Li�t
� Gltv�d or Lo�t�-Chrom�(=1) matrix Other!z� lain in remarks?
H�-dric soils preseni? ��es no � .
R�cionale for decisionlRemarks:
«'etland Determination (circle)
Hvdraph��tic vt�ctation presen�? ycs � no
Nydric soils prestnt'' ��yes� � no Is the sampling point �cs n� _
�'z�land h�•droioRv �resent'' �cs n� , ���ithin a wecland'.'
Rationa3 elRernarks:
n� �- ' �
;-�/} i
!�OTES: ����G•��'�t�(,,�`� �,{}j't.�( p/n� � � ��. �C7i,,C.1,C� U•��.�
j� Gl��~ � � ,
�`�(,�C,.�i-ZC,.�1 ��'��C;P'r�-C'�'r.�c:�c'�'"_'., ��, �-�"`'L ,
� �Z,. /j�yl���,�E.�Gf �r,!f�r�G-�'?'l� r`��L�f.•Z!""&C,',�---� ��..t�l�' �G'2.'„�,��� ��'""y�.
� C�
� V�(1 �.�I(�'l�` Gl.i`,.lX�t.-G'�--"'
C'!� � ��%�'�� �'/r'�� ' 1 ,�{,'" .i, �I` ,
,� ``" � , Revised 4/97
� �:�.'�'�'� C�° '�`� k��'I
��✓� ���-�ru
DaT.a FOR�I 1 (Ret�ised)
Routine ��'etland Determination
(«.�State «�etland Dclineation l�lanual or
1987 Co s ti ettand Delineation !�'tanua!?
PrujccUSiic: �., . Datc: r:�_ ,-, �
V_2.Q-o.c �` �!f��. /�71�_...- �� � ..✓ --C��
..
Appli��nUowTcr � �L ,;�^ �� � County: ����,� �•`
�°'►�✓,7,,,f,'.,t./.�. c��-f-__�cG;
� Slale: r:-., '_.
� SRrR: �'c:.�'.��.�`,,�-f-�
Inti�csti_�toris .
I Do !�c��rnai Circumstancc�tiist on tht sitc' �z''T no Communit� ID� , . '
�_�.- �:..� -
� Is thc �ite si�nificarnl�•distur�d(at�pica! sitcationi.' yts �no / Tran�tct ID: '- f� r '� _, _
Is �he zrca a poier:ti�l Pr�blem Area' � ��ei i[�o Ploi ID: l J` ''
;�ptanation of aR•Dical or roblem atca: � e�>��U f I G ���5�o __ .. - -
�'£GETATIOti (For straca, indicate T= vec: 5=shrub: H =' trb: L'-v�nc)
,
Dominani Plarn S -_cies Strat�m �t co�er Indica�or pominant Plant S�ecies Stratur� �ic c��e� Indi�aior
�Q'( �;�.t �""t,�r ;�- � �� ��4-�
���� r�_ S � � ���/
� �
;'Ccti�-�,° � I � � %`i���� �
��
, �
; H1"DROPf-i�TIC �'EGETATI�'�I�DIC�TORS:
�
I� K of dominants OBL,F.�C�',S F.yC ��
ICh�ck all indicators that appl}• R txptain belo��� �
iVisual obse�-ation of plan; soecies sro«�in� in Ph��sioio�icaUreproductit•e�d�ptations
, are�c of prolonoed inund�tion/:�tursuon �t-t;land plant dat�base
� 1�]orpholo�i:al adapt�;ions Persbnal knowfedge of re�ional plan[commur.ities
T�hnical Licerature Other lcxplain)
Hti'droph}•tic �egetation present' _� j no �
Ra:ionalc for dccisionlRcm:rl:s:
�
HZ'DROLOGY
Is it tnz gro��in�season'' .•es no �'ater Marls: , �� no Stdimznt Dcposit . es no
L�� '���/_ on
Based or,: sotl tzmp(record temp ) Drift Lincs: �•es no Draina__e Ps�terns: .�as no
othtr(e� lainl
Dept_of inuncation: � inches � Oxidized Root(ii��e root Local Soil Surve��: yes no
�- c.(��� Channcls<12 in. vzs no
Dcpth to fret K•ater in pit: inchts �7',' FAC Iveutral: yes � o Water-stainzd Lea�� s y no
�
., th to saturnted soil: � inches
ChecA all that appl�&esplain bclov.•: Other�ezplain):
Sveam, Lake or gaoe da�a:
Acrial photosra hs� Other:
�'edand h�-drolo�r present' ��es no
Ra:ionale for dccision/Rtmart:s: �i
� + sorLs �
I
� ?rlap Unit '��me D;ainage Ciass
(Scrics &: Ph�se)-
Field observa�ions confirm Yes I•lo
Taronom�� (sub�rou ) ma d tv e?
j Ptofile Description
� D�pth Horizon Matrix color !�lottlt colors �to[tlz a�undance Texwre, concretion�, Dr���in� of soil
(inches) (Munseil (Munsell size � contr.st structure,ccc. pro�ik
moist) moist) (match dcscription)
�✓.��,� ; o � - �� �- ' �
, .�-- z �
, �f� J,
� �""�✓'v�i-.
/
� r
I � .
� `_� `�'-- r
1 � • �r
I .�'-��.v��.c�.-. .
I '�..z�l�� `��5;�.�c.._
�
H��dric Soil Indicators: (check all that appl��l
Histosol Matrx chroma<_ ? with mottles
Hisuc Epipedon M�or Fz Concretions
Sutfidic Odor Hieh Orsanic Content in Surfacc La��er of Sandv Soils
' Aquic Moisture Regim� Organic Strcakin� in 5and�� Soils �
R�dv�iTta Conditi�ns Listed on \ational/Local H�dric S��ils Li�t
Glzvzd or Low-Chrom:: (=1 J matr[� Other(z.� fain in remarks)
H��dric soils present' �� no .
Rationalz for decision/Remarks:
E;'etland Determination (circic}
Hvdroph���ic vz�etation present? ve no
Hydric soils present? � ne Is the samplin� point �t no
VJzttand h�•droioRv resent? - no ��'ithin a wetland^
RationalclRemarks:
, , ,
� — -
� ��� r _ �� , -�,.-�-- ��..��_ _.
�.
I '� . ^
?�OTES: ��,����
�
Revised 4/97
__.�
D�T,�. FOR�1 1 i�evued)
Rouane tiVetland Determination
(«.� State �t'etland Delineation Manual or
14S' Co s ��etiand Defineacion ?�Zanuall
P-u ccUSiic: :- :� ,; �+ • Datt: /�'`7'
1 :��-F���:�i:.v�,Y c���i /i �C�f� ���'���/
r,.,-
A�plir�nt,'ow�Cr � Counry: �'�
/ �"� �
St�ie: � _
--, -
I�tc�ti�_�toris;: ` �'�✓�, �4.l�; S,rT,'R: ��'%'��c,-'��J�7�—�
IDo?�c�rmaJ Cir.umscancc�ctist on[hc sitc' �t� no Communit� ID: ,
Is i�c si�e si�nificantl��dfstu;bcd(at�pica:si[ua�ioni' yz; �� Trznscct ID:
Fs �he iea a po�rntial Problem Area' �•zs no- Ploc ID: ��� �
� ��lan�tion of ar�• ic:al or roblcm arca- � ��
� �'EGETATION (For strata, indica[e T=vec 5 =shrub: H =htrb; V =vine)
� Dorainant P1ant SQccies Stratum 4� co�cr Indicator pominant Plant Soe�ies Scratum 9c co��er Indicator
f` I
L�� lff. ...�.'a ' � _ - \
-� �'- ,�.4-r;ln�, �L�--
� --- � , � 1
� �
� :ti� �z, 1�� 1 �r n� � o�;� � �
i � � j �� ��--�-«-- i �, !,
� �
i � � ����� � ��� � ' j
, � � '
i�-�-0--s� ' i ^ �--' � ��l�S � �
i
i . ' �
I,,,� r . � �} i-; ��..C..�' �`t�;;t-� t,--i"� ` %
H1"DROPHITIC�'EGETATIOti I�DICaTORS: � - 7 '
� /�yp� /� �=x-:.,t,r
-=}-� -- �; �:
� �01 dominants OBL.F:�Cu`,S FaC �� - -
i L�r' t'''t `�L �--� ;��c4?- �-c.... I��
' Chcck all indicaro;s that appl}• ci z�pl5in�eio«-: U �� �
I
I Visual obsen•ation of plant species�roa�in� in Ph�-sioio�icallreproductiti•e�daptaeions
� art��of prolonged inun;�ation/;�tur�tion «�etland plant dacabase
; ,4iorphologicsl adaptations P�rsonai knowlcd�c of rc_ional plant commuciiics
Tr.hnical Litzrature Other(exDlain)
Hz•droph}'tic vegetation present' �•es no �
. . ;
Rationak for d:cisionlR�marls:
Hl'DROLOGF
Is i!ihr�ro�;no scason'' ��zS� no �'ater Marls: ves no Stdimzn[ Dtposits yes o
on
Bascd on�oil tem. Irecor�tzmp ) Drift,Lines: �•es no Draina_c P:,tterns:' pes 'no
othtr(cx lainl `
Uept.�of inundation: in:hes ���� Oxidized Root (li�•e roots) Local Soil Sutve��: y�s no
Channds<12 in. vzs no �
Cxpth[o free �•ater in pic: �inches �AC Iveutral: • yes n�� Waier-scaintd L,ea�� se�yes�no
_ th to saturated soil: incnes
Check all that apply &explain belo�•: Other(tzplain):
Strcam,Lakc or ga�c da[a:
Atr.al hocooraphs� Othcr
VVetland hcdrolog�� present:' �n�es + no
Racionale for dccision/Remari:s: '�✓�
,
cp_ILS i
i
�1ap Unit tiame DrainaQe Cl�s
(Sc:ics 8: Phase}
Field obser�•atioas confir.n Ye� No
Tatonom�� (sub�rou�} ma�cKd zv e'
Profile Description �
Drpth i-iorizon Matrix color Mottle colors �1o[tlz abundance Texture.concretionc, Dr�u�in: of soil
(inches) (Munsel! (Muncell size g contr�st structure,ecc. profilr
moist) moist) (match dcscriotion)
✓ 1 � � `%�J
L;-��� ;� _ 1 .��,�7�,)/�' � �/Z y ' � �� � �-zf'iY►-f/
�
�-- � v `t" � �
� ,
1
1
i
�
± �
i
H��dric Soi] Indicaton: (ch�ck alJ tnat apply) ,/
Histoso! " Matrix chroma <_? with m�ttles
Histic Epipcd�n Mg or Ft Concrctions
� Sulfidic Odor Hish Or�anic Contcnt in SuRacc L���cr of Sandv Soils
� Aquic Moisture Regimz Oroanic Stre�kins in Sand�� Soils
IReducin� Conditions Listed on \ationallLocal H��dric S��ils List
�
+ Glzvtd or Lo���-Chroma t=1)matri� Other(t� lain in remarks)
+ H��dric soiLs preseni? �s no .
� Rationalt for decision/Remark.s:
�
��'ettand Determination (circle)
I
; i-�ydroph��tic vc�eta[ion present? no
N�dnc soifs pr�scnt? es no Is the sampling poin� �es no
'�Jttland h��drolo�v prcsent? es no ��'ithin a wetland''
RationaleJRemarks:
�C 0 7 ���;�`�i(�LS ��/�' "� . '
.,�; . . �
� �
�
?�OTES: �,�f � � � ��� vy�- � li�/ �--- ��/v
� �' � yl � � "/
� v� ��
�
�� �,� > �S�(�
� Revised 4/97
� �^.�1� /!i1 ✓a
�f� /� o',�.�;'1�-
D.aT:� F'OR�i 1 (RevLsed)
Routine `�'etland Determination
(\��.a State «etland Dclineation Manual or
14fi7 Co s ��etland Deiineation Manuall
Prvjcc:/Si�c: �F �� n Datt: �/�2�
�
.�'� �� /`rt,� � �;�=
Applic�nl/oµ-ncr: County: �j��
�, State: '
, In�csti_atorisY u �� $,��: �V��
Do Nc�rmal Cir.-umstancc�ztist on�hc siic' �e no Communit� [D: , .
Is tne cite si�nificantl��disturbed (at�pical situa:ioni'.' vt� � Trame:t fD: �� , !
Ls Lhc area a potential Problem.Area' r.,�, ��e�� n� ' Plo� ID: !/� L�L
�Dt�nation of an• i�al or robicm arca��
�'EGETATION (For strata, indic�te T= vec: S = shrub: H =herb; _��ine)
Dor-iinane Planc S ccies Stratum 9c co�er Indicator pomir.2n[ Plant Saecies Str�tum �ic co�er Indi�at�r
� I ^ yf•
� ^ `
/�.--- � � �r �� !�..����, � .� ,�.� � �
' '�.IA' �d/� 11 � f f�ll✓- �r/�- '✓i�' � �` �
` �� � '�, �.�� _`� � �y ��`��- ' ` t .�,^��� �✓ � �_
�///���� � � � I �/� " '
�� i rCX�CXCX� �/ i �'r �"t"�` ✓� ` '
�uW�l 77 � I ,� � � ����/I
(�Y�" Ctit,(.C�. '!7�` _'_ ` fy��-� I
i J �'
Hl'DROPHITIC �'£GETATfO'� I�DIC�TORS:
r of dominancs OBL. F.aC�', fi F.�C�
Ch_ct: al1 indi:ators that app3�• cR: txpi�in beio«: �
Visua{ obsen-�uon of p:am spe:izs �ro���in� in Pht•siolo�kaUreproduc�i�•e adapcacions
are��of prolon�ed in�n��tion/;atu;a�ion ��'r:land plan[database
hio�holo�icai ada�.aiions Pzrsonal knowledge of recionai plant cnmmu^iiies
Te:hnicaf Li[zrature Other fex lain)
Hc•droph}•tic vegetation present'' ces no
Rationalc for dccision/Rcmarks:
HI'DROLOG�'
Is it th��ro�in� scason' ��es no �'a�er Marks: ves o Stciiment Dtposits: yes no�
� � �-� on � �'-
Based on: �:.�_Y soil [emp Irecord temp } Drif; Lines: ycs rio Draina��e Pa�terns: yes no
othtr (ex lainl I
I?e�t.�of inundation: �inches Oxidized Root(Ii�•c root Locz! Soil Surve�-: yes � �I
'y�� Charnds c12 in. ves 'n
Dcpth to frez w�ater in pir. � inchzs !-�' FAC tieutral: - �cs rt ' Vra[tr-stainzd Lea�es y�s �
th to sa�urated soil: �— inches y
Checl:a►1 that appl� &-xplain be3oK�: Other{tzplain):
Stream,Lakc or ga�c da[a- '
Aerial photoora hs� O�her:
Wciland h}�drolo��• praent' �•es , no
Ra�ionale for decision/Rzmart:s- ���
so �
Map Unit '�ame Drairase Class �
(Scrics 8� Phase)
Field observations confirm Yeti 1�Io
Taxonom�• (sub�rou ) ma� d tv e?
ProfTle Description
I?epth Horizon Matrix color Mottiz colo:� �tottlz abundance Texture, c�nctetions. Dra���in� of soil
(inches} (Munsell fMunsell size &: contrast structure, ete. profilr
moist) moist) lmatch drscription►
��-r'.-�� l�
t�-l��- l�-� 1�`l� '� -' `� �-r-�
i
f f �
i
,
� �
1
H��dric Soit Indicatocs: (check a11 tha� app}�j
Histosol Macrix chroma <_? with monles
Hisuc Epipedon Mg or Fe Concretions
Sulfidic Odor Hi�h Or�anic Content in Surfac: La��er of Sand�-Soits
Aquic Moisture ReQim� Or�anic Str�aking ir.Sand}� Soils
fteducins Condi�ions Listed on \acional/La.al H��ciric S��i�s Li�c
Gltved or Lou�-C:�roma(= atr:� Other iexDlain in rernarks)
H��dric soik present'. �•es no
Rationalz for decision/Remarks:
��'ettand Determination (circle)
Hvdroph�tic vc�etation present? �� no
Hydric soi{s present? yes n Is the sampfin� point �ts n�
�'�fland h�•droloRv resent^ ves no ���ithin a wetland.'
Rabonal eJRemarks:
r � , Q �� ,�
@' 1E�`- (�� LCiI.. ���a�'�� t�i(�TJ/�{`Z_ ���_
11 l/ (/ �
, ROTES:
Revised 4197
D,aT:� FOR�t 1 (Rev�sed)
Rourine«'etland Determination
(«�.�State «'etland Delineaoon Manua! or
1487 Co s ��edand Deiineation ?�'fanual)
ProiccL'Siic: �' � ' Dat: G, � --, i
��--�� �'��� ��_�'�—'�- l ,i o` �` �!�
� qpplic�nJoK�ntr: Coun[y: '
St�te: ����`�'
�
In�•csti�_a:orts`: �° �b�: S,rr,R: �P� "��`-%
jDo!':c,rmaJ Circumscancc�tzist on the site:' . ' no Communit� ID: . . ;
Is �c ciu si�nificancf�•di�rurbcd (at�pical si[��iionti'.' �zs � Transect ID:
� Is thc area a poiential Probiem.Area^ , ��zs � l � Pioi ID: � _
� Facptanation of an� ical or vrob3cm area: - f'Yt.� - ��
' �'EGETATIOti (For itrata, inditate T *ec: S = shrub: H = htrb;V-vinc)
Domin�nt Plant S ccics Strawm �r co�u Indicator pominant Piant SDccies Str�tum 9c co��er Indicator
1���� ��� � , v ��-� P�� ��� ., _ ,� I �-��
�
� �- �;� s , � ��-��;�;' �,�.-�-�.; �- i� ,�v
� � '� � ;�,���_ � �'--� � �'D ;�✓%-
f . ��
� ��t;�-��/_ � �r �� � �% �
; i ( ,� i
�. c -�" {���--,' ' ' �,�f-�''
�_� �- � v
;
i � , � � ,
f� 7�'�'^ r %�'�' �:<� ;
H1�ROPEi1'TIC �'EGETATIO�I\DIC�'fORS:
r of dominan�s OBL.FAC�', � F.�C
c�/;
� ,
C6tc�: a[I indicato:-s �ha�ap�l}�8: exp:air.beio.t�: �
Vscal obse�-ation of plan[soeci�s�ro��-ine in Phvsiolo�icaUreproducti�•e adapta[ions
arc��of prolonged inundationl;�tura:ion «�rtland plant database
h�orpholoai:al adaptations Pzrsonal know;cd�c of r^rional plant c�mmur.ities
T-chnical Li�zrature O�hcr(ct lain)
H��droph}•tic vegetation present'. � no •
Rationalc for dccision/Rema:ks:
H1'DROLOG�'
Is it thz �ro�-in� se�son�' ��es no V�'ater Mar►s: ves rr� Scdiment Dzposits: ya o
� �-2.G� , on
Bascd on: soil tz�ecord tcmp ) Drift Lines: ��a �no? Drain���e Patterns: res no
otner{tx lain)
IYpt.of inundati�n: ^ inches Oxidizcd Root{}��•�root Local Soil Surve��: yes no
` ,____ � Channels<]2 in. ves '�
Dcpth to fret �•ater in pit: inches ��✓; FAC Neutral: }�es cro Water-stained Le���es ye no
D th to saturaced soiL �'"" in:hes �
Check all tha: appiy &explain belo�•: Othcr(ezptain):
Strtam,Lakc or ga�c data:
Aeria1 flhotosra hs' Other:
Weiland h�-drolo��' present? }-es no
- �
Rationale for decision/Remari:s� '
CQILS
►�1ap Unit :�ame Draina�e Class
� (Sc:-ics c� P7ase)
FieJd obsecvations confirm Y'�s T;o
Taxonom�� i suborou ) ma d tv c'
( Profle Description
�pth Horizon Matrix color � 'vfottlz colors �toctlz abundance Texture, concretions. Drau in_ of s�il
(in.hes) (Munsell (Murtsell siie 8: contrast structure, etc. profilr
moist) moist) (match deccription)
�_ ��'' ,-� 1 n,
,�-�L - � - -
;/ �
�
, I
,
� �
Hf•dric Soil Indicators: (check ait that appl}�j
Histosol Matrix chroma <_ ? wi[h mottles
Hisuc Epipedon Mg or Fz Con�retioas
Sulfidic Odor HiQh Or�anic Contcnt in Surfacc L���cr of Sandv Soils
` ' Aquic Moiscure Regimz Or�anic StreakinQ in Sand}• SoiEs
Rtducina Condi[ions Listed fln \ational/Loea! H�dri: Soils Li�[
Gizvzd or Lou•-Chroma(_] atri� Ocher (e�ot�in in remarks}
H��dric soi�s present' ��es no
Rationalz fo;decision/Rema-ks:
t�'et[and Determination (circic)
Hvdroph�tic ve�etation present.' ycs� �
Hydric soils presrnt`? s ' n Is the sampling point �zs no
�'etland h�•droi��v resent`' ves no �rithin a wetland'
RationaleJRemarks:
NOTES:
Revised 4l97
�
D�T.a FOR�1 1 (Rcyised)
Routine 1Veiland Determination
i («_� State «�etiand Delineation Manual or
1987 Co s ���ettand Deiineation ?�4anuall
Pr.jc.-;:'S itc: �/� Datt: /� / ..7/��t
�-)�s'1_� r-�-1).F= r t�
r •
Appli:anUoµTcr. �.�.�.� Counry: ` �� / ��
fL Staie: ��ti�G , --�-•-
Ir�^>>i�_.�ior(s): �_.- F:'1T�r�` SIT�R: � -�i3L...
Do'�c�rmal Circumstancc�tzist on[hc si�c° � �t� no � , Communii� ID: , _
Ls ihc zitc si�nificamh�d;�curbed(at�pical si[uation�'.' `� no �� Trar.�ect ID: � �� f _,
Is �hc uea a pocrnti�f Problcm Area' ��zs no � Pioi ID: � ��/�}
�za,anstion of an• ical or robicm arca:
`�GETATION (For�trata, indicate T= vice: S = shrub: H = htrb: V= vine)
Domir.ant Plant Sp^cics Stratum �� CD�'tf Indic�tor pomina.�� Plant S�c:ics Str��um r� co�er � Indicator
i �
�
�� �u� � � � j �C� '''' �
� �
< <
I I !
� � ;
j �
�
(
H1"DROPHI'TIC �'EGETATIO'� I\DICaTORS:
�- of dorr.inans OSL. FACu`, S F.�C
C���k al! iodi:a�ors thac appl}•g zxpla;n bclo.��: " ,
Vsuai obscn-ation of plar.t spccics gro���in� in Phvsiolo�icaUreproducti�•e adaptauons I
arc��of prolongcd inund�tionl;�tura:ion «'ttland pian:dac�base
' i��or�hological adap:a[i�ns Ptrsor,al knowledge of re�ional piant comrn;�r.iiics
T-:hnical Littrawrc Other tcx tain)
� HFdroph}•tic vegetation present? ��es no
Rationalc for decisiorditemart�c:
HI'DROLOGY II
Is it thz�ro�in� seasor' �es� na� u'ater MarE:s: �-es o �t�ir.ient Dtposits: ye no
.,�-,���QJ� ~ on
8� d on: �m (rcc rd tzm�' �-U ) �� Drift Li�es: yes n Drain�_�e P:,tterns: yes rio
othtr(cx lain 1 �
Dcpt.�of inundation: — inches Oxidized Root{li�e roo, Loc�l Soil Surve��: yes o
Channcls<12 in. �•ts �
Dcpth to fret w•a[er in pit: incht(s 1� FAC IvcutraL• yes no Water-staintd L.ea�•es ycs�
D th to satura�cd soil: " inches
Chcck all that apply&e�plain belou�: Other{explain):
Strtam,Lake or gagc daca:
Aerial hoso�ra hs: Other:
V4�tfand h�-drolo���prescnt? �•es no
Rationale for dccision/Remarl:s: -'�
SOTLS j
� �`.ap Unic :�ame Draina�e Ciass I
� (Scrics R Phase)
Field observations con{irm Ye� No
Ta�conon��• (sub�rou ) map d tv e''
Pr�file Description
D�pth Ho�zon Matrix color 'vtottiz colors �io�tiz abundance Texture, concre[ion�. Dra���in!*of:oil
(inchcs) (Munscll (Munscll size g con[rast structurc, etc. profiir
moist) moist) �match dc�cri�tion►
�
�-`� /� lZ 3/3 �.��'-�
�
�
� �
I
�
H�•dric Soil Indicators: (chcck all thac apply)
Histos�l Matrix chroma <_ ? wiih mottlzs
Histic Epipedon M� or Fe Concr�tior.s
Sulfidic Odor Hish Oreanic Contcnt in Surfacc L��•er of Sand�� Soils
I Aouic Moistuc-c Reaim� Oroanic Scrtyl;in� in Sandy Soiis
I � Reducin� Conditions Listed on \ationaULoea1 H��dric S�vls Li�t
� Glzvtd or La«-Chroma(=1) matri� Other(e� fain in rcmarks)
I H��dric soiLs present' ��es no �
Rat►ona4� for decision,/Remar�s:
��'etland Determination (circle} ,
Hydraph��tic vt�etatio�present? ,,c no
' Hydric soils prtsent? yes 0 Is the sampVing point �ts no
�'etland h�•droioRv prrsen[^ ves e �t�ithin a wetland^
RadonalelRernarks:
�
� . .
� . . ,
?�OTES:
Revised 4/97
D�1T.-� FOR\1 1 (RrvLsed)
Routine«'etland Determination
(«.� State «�etland Dclineation !�4anual or
I987 Co s �ti�etland Delineation Manuall
�fU)GCL�S I IG: QSIt:
�-� �� ,�,�__ , `/ l;�v �.
Appiirant/ov.�c-: ��� County: �����
'�, St�ic: J ��o
Imciti�_a►on:z!_ �,� 77� Sl'T,R: � "'''� .
� Do ti<�rma]Cir:umstanr_s czist on thc siic' '��t' no ��� Communin ID: , .
Is tnc citc si�nificantl��di�turbcd fa��pical situation�".' ves no iJ � Tran�cct 1D: n
Is:'r�e arca a poicnr.�! Problcm Area' ��e� no ��,�— Ploi Ii�: � ( ' �
�c�lanation of an• ical or�roblem a*ca: U
�'EGETATION (For ura�a, indic�te T=vice: S =shrub: H = hzr�:V =vine)
Dominan� Plant 5 ecics Stsawm 9c cd�cr Indi:ator pominant Plan[ Soccics Str�tum �%� co�•er Indicator
� ���,�_ ���-�-� , , j�,-�' ���,!� ��, � � a-.S �
�� �
_� � �G�-�.� a�-�.�� ,�_ � � c � �" �� � � ��
' ; I f-� i ,-; -��-�� � t� �
� ��� �� �
� �� �r�� � ? �i ' T � � �
,
, ; -
� Y
i
; �'� I
Hk'DROPH�TIC �'EGETATIOti I1DICaTORS: ' �.
I r ( ,
� z of dominans OBL.F.aC�', b F.�C_�
( �
Che�4: aii indi:�iors [hat Zpp1�• & txpE�in belo���:
visuai obsrnation of pl�nt saccies ero«�in� in Ph�-sioio�icaUrcproducti�•c adap;ations
art�c o`prolon�ed inundztion?>at�ra[ion «�ttland planl database
hto:pholo�ical adaptations Ptrsortal knowicd�c of rc;ional piznt comm�r.itics
Tr.hnical Litenture Othcr(eti lain)
H��droph}•tic vegetation present:' ��a. no
Ratior.alc for cccision/Re:narks: '
H1'DROLOG�'
Ls it ttiz grou-inQ season'' �es �� �'a[er Marts: ves � Sedim�nt Dzposits: yes o
•�t1'r,�.F,�U�' �C�vfi ,��./.I-2-, °" � -
B:sed on: soil �zmp crecord tzmp ) Drift Lines: �•es no Drain��_e Pattcrns: �•es no
otht:(ez lain)
Dept.bf inuncation: `� inches OYidized Rooc{li��e roots Local Soil Sur-��e��: yes n�
�, ��✓1�51'�9-- Channcls<12 in. vts n
Dcpth to frce u•atcr in pit: � inchts FAC Neutral: ye na Water-staintd L,ea�'es yes no j
ih io sacur.,ccd soil: '— inchcs
'� Cneck all that appky &c�plair. belo��: Othu(explain):
Strcam,Lake or gage dat2:
Aer,al ho�osraphs: Other: _
Wetland h��drolog�• present? �•es no ��
Rationale for decision/Remarks: �
_ � !? ��r
�-.rL�� (,�f�c�� c�.i) � � ,. ! ��
`°--f- }
'�1ap Unit '.�a.�ne Drainaae Class '
�Sc:ics c� Ph�se)
Field obs�rvations confirm Yes No
TaYonon;.� (sub�roup) ma d t e''
� Profile Description
Depth Horiion h4atrix color 'vtottlz color� �tot[1� abundance Texture, concretionc. Drsuin� of�ail
(inches) (:�4unsc1l (Munse[I size 8: :ontrast structure, etc. profiir
moist) moist) lmatch dctctiotionl
� �� . �y�� �. s� (
. . ,
�
�
�
� ,
, ;
H��dric 5oi1 Indicators: (chcck all that applyl
Hisrosol Matrix chroma <_? with mottics
Histic Epipedon M=or rc Concr�tior.s
Sulfidic Odor Hi�h Orsanic Contcnt in Surtacc La��cr of Sandv Soils
Aouic Moisture Re�ime Or�anic S�rtakinQ in Sand}' Soils
� R�ducinQ Condicion; Lisced or �acional/Lxal H}dric Soils Lict
� Glzvtd or Low-Chroma (=1) matrix Other fzzpfain in remark5)
H��dric soils present? ��es no
Rationalz for decisionlRemar�s:
«'etIand Determinateon (cucle)
Hydroph��tic v��etation present? �\ yc ` no
Hydric soSls pr�sent? yes na Is [he samplin� point �zs no
�'etland h�•droio�v resent'' vts no �rithin a wetland'.
RationalelRemarks:
l�� .,��1��1G'� .
������ ���
'�d 1 E$:
Revised 4J97
D,�.Ta FOR�1 1 ,Rc���sed)
Routine��'etland Determination
(�i.a State «'etland Delineaoon Manual or
1987 Corus «�etland Delineation ?�Tanual)
� Datc: �' !� i� �
�t>iccL'Si[c: i'. `' � /� �� /
[� � v
,Applic�n:/ow-nCf: �� Councy: �' �n /`
� St3te: �' � /
intcsti�_atorls): �- t��liti—� S�i;R: � ^
j po Norr.iaJ Circums;ancc�zzist on che si�c' �z�� no Commur.i�� ID: ,
' Is thc cite si=nificantl��distur�cd tat)pical situntion��' ��es �no ' Tran�ect ID: ,, .
Ls[he area a po�rnti�l Problcm Arca' �•es �fio'� ✓, Ploi [D: � �� �
�z�lanation o(an•pi�al or roblcm arca: L'�� ��
�'EGETATION (For�trata, indicase T=vee_ S =shrub: H =htrb;V=vine)
Dominane r lan; S �eies Stratum �c :o�er lndica�er pominant Plarn S�ecies S:ratum �%c co+er Indi.a�or
� ^ �.►� d 1 �' � '{J--.
l � �_ � � � �
I
��, � �� ��Ut�
� ,-, . I
� r=.�- r , .-�� � `:� .�'0 -��- �� !
�
j ��%"'r'�� �'�-�� � �l�� r1� �,, ',ln%
`� ~ t�,` `1 i� �'C�1��✓
I � t� 1
H�"DROPEi1'TIC VEGETATIO'� I�DICaTORS:
. •� .
�'�of dominants OBL. FACu',b F.�C � �C�
� �
i Cneci: �Il indicators that app!}' � cxplain belo«�: '
i
�'is�al obscr-ation of�lant specizs�ro��•in� in Phvsiolo�icaL�reproducti�•e ad�pta�ions
arcr..� of proior.oed inundltion/;atur�tion «�etland plant database
t�fo;pholo�ical adapt�tions Pzrsonal l:now{edge of rerional plant commur.ities
Trhnical Li�erature Other(ez tain)
� N��droph�•tic vegetation present? ces` no
� Rationale for decisionlRemar4:s:
1
f
,
H1'DROLOGY
u it[ht gro��ing season^ �•es no �'a�er Marj;s: ves o I Stdiment Dtposits: es no
���.% on .
$ascd on: � soil temp(record temp ) Drif;Lines: �•es no- Drair,��c Panerns: �es nn
other fe�ptainl
Dept.�of inundation: • --� inches Oxidizcd Root{ii�-c roo Local Soil Sun•c��. e n�
Chann�ls<12 in. �•zs
i Dcpth to free ��ater in pit: � inches FAC Iveutral: � yes ne ' W'ater-stainzd Lc��'es y nd
� Dc th to sacurated soit: inches
Checl: all chat apply &e�plain below�: Other(czplain):
Stream,Lake or ga�e da�a:
Ac:-ial ho�o�ra hs: Other:
WetFand h�-drolo��•pres�nt? ��•es no
Ra�ionale for de�ision/Remarks: '�
CQ._ ILS
?.4ap Uni: '�ame Draina�e Ciass
(Scrics � Phase)
Field obse��ations confirm Yes I•1a
i axonom. (sub�rou ) ma xd tv�e?
i profile Description
Iiepth :io-izon '�4acrix color '�ottlt colon �lottle abundanc: Te�ture, c�n�retior.c. Dns��in_ of.oil
(inches) l (Munsell {Munselt size 8: contrast structure,ctc. profile
� moist) moist) �match dcscrip�ion�
�J— �'-�-+ �--� S ✓C� ��-
I I����. ^ �Y�i. ✓
I �d..�;L1.1�-�--r.��`
I I
�t�..�, �
� � ,
�.�..� `�
�
� �����
� � , �
j H�•dric Soil Indicators: (chcck all tnat apply)
� Hisrosol ?�latrix chroma <_? with mottl�s
� Eiisuc Epipedon Mg or�e Concrtioas
� Sulfidic Odor Hish Or�anic Conunt in Surf�cc La�•cr of Sandv Soils
�. Aquic Moisture Re�imz Or�anic Strc�,kin�in 5and;°Soils
� R�ducinQ Condi�ion� Listed on \ationaVLocai H�dric S��ils Li�t
; Glzvtd or Low-Chroma(=1) rnatri� Other le�plain in rcnarks)
H��dric soils presen['! �•es no
Ra.ionalz fo:ciecision/Remarks: �
I �
I
�
I �;'etland Determination (circle)
Hvdroph�tic vt�etation presen:? �Y� no
Hvdric soils przsen[? no Is the sampling point }{s no
�':tland h�•drolo^v resent? ' ts no �rithin a wetland°
RationaleJRemarks:
L .
?�OT'ES:
Revised 4l97
DATA FOIL'VI 1 (Revised)
Routine VVetland Determination
(WA State Wetland Delioeation Manual or
1987 Cor s Wetland Deliueation Manuai
ProjecdSite: �f�� ���, Date: 1, J-� /O�
/ �
Applicant`owner:� Counry:
State:
Investi ator s : � S/T/R:
Do Normal Circumstances exist on the site? y s` no Community ID:
Is the site significantfy disturbed(atypical situation)? yes Transect ID: ��D� v
Is the area a potential Problem Area? yes no Plot ID: �
Ex lanation of a ical or roblem area: '
�'EGETATION (For strata,indicate =vee;S= b;H=herb; =vine)
Dominant Plant S ecies Stranun %cover Indicator pominaui Plant S ecies Stratum %cover Indicator
�'v �o
� �� ��
^ G�-,,�.�..�,v �;- �- � � '
I
HYDROPHYTIC VEGETATION INDICATORS:
°�b of dominants OBL,FACW,&FAC �
Check all indicators that appiy&explain below:
Visual observation of p)ant species growing in PhysiologicaL'reproductive adaptations
areas of prolonged inundation/saturation Wetland plant database
Morphological adaptations Personal F�owledge of regional p]ant communities
Technical Literature Other(ex lain)
Hydrophytic vegetation present? yes no
Rationale for decision�Remarks:
�nxoLocY
Is it the growing season? yes � Water Marks: yes n Sediment Deposits: ye o
on
Based on: oil temp(record temp_� Drift Lines: yes no � Drainage Pattems: yes o
other(ex lain)
Dept.of inundation: � inches Oxidized Root(]ive ro°� Local Soil Survey: yes o
�-. ,..- Channels<12 in. es lud
Depth to free water in pit: inches �"�''�'� FAC Neutral: yes n Water-stained Leaves yes
Depth to saturated soil: "'' inches U
Check all that apply&explain below: Other(explain):
Stream,Lake or gage data:
Aerial hoto a hs: Other:
VVetland hydrology present? yes no
Rationale for decision�'Remazks:
�
soiLs -
i
'�1ap LTnit Name Drainage Class
(Series & Phase)
Field obsen�ations confirm Yes No
Taxonomy(subgrou ) ma ed tyrpe? i
Profile Description
Depth Horizon �latrix color Mottle colors Mottle abundance Texture, coneretions, Drawing of soil
(inches) (Munsell (Munsell size&contrast structwe,etc. profile
moist) moist) (match description)
�-�! 2� � � 10 9Z� � __._ �-- � ` �--
�r
.
k.... �. _. .d--- �z--
i
Hydric 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 Cooditions Listed on NationaULocal Hydric Soils List
Gleyed or Low-Chroma(=1 matrix Other ex lain in remarks
Hydric soils present? yes o .
Rationale for decision-Remarks:
Wetland Determination (circle)
Hydrophy�tic vegetation present? yes n��
Hydric soils present? yes n Is the sampling point yes no
Wetland h drolo � resent? �es no ' within a wetland?
Itationale/Remarks:
NOTES:
Revised 4/97
'
D.aT.� FOR\1 1 (Rtvse�)
Routine«etland Determinadon
(«.a State «�etEand Delineation Manual or ,
1487 Co s ��etland Delineation !�'Ianual)
prvjcct/Site: �' f�, �,, Da�t: �� � ���
r-1� / !(/'C--� � /
.Applicant/owrrr. �� � Lount}': �, • /
S���e:
c..�t��
� � �' �. S-'i'�R: j
In••csti_�.orts•
Do?�<,rm�l Cir:ums:anccc tcist on che siie' c� no Communit� ID: , _ '
ls the sitesi=nificanil��di�turbcd {at�piczl situationi�.' �t� no" � —� Transect 1D: �_ I �^, I�
Is�hc�rea a potential Probiem Area^ ��es nc Plot 1D: / ��•� ^
�x�lanauon of an� ical or roblcm arca: �� �s�
�"EGETATION (For strata, iodit�[e T=trec: S =sh-ub; H �bzrb: V -vinc)
Dominan�Planc Sv�cies Stra�um 4c co�u Indicator pominant Plant S�ccies Stratum �%c co�er � lndicat�r
�� �, �d�.--�5 `� S(� �r� � f
� � � � � � �
, � � ! �,--, -- ����
� �� .
� , ; S � �-�� E;�f:
� � � �
- r� ,�� }--�- 7- ���v' ,
___.�
I � �� (,�,,�-�-fi"s �-� � �'� �
DROPHl-I`IC�'£GETATIOti I\DIC�TORS:
rr of dominanu OBL. F�C�•',� �.aC�
Cbtck all indicaton tha��pp1}�8: txplain belo���: "
Vissal obsen-a!ion of p;ani spcci�s gro�t•in�in Ph��sioln�icaUreproductiti•e adap[aiions
areas of�rolon�►d inundationl;a�uraiion «�ttland plan[database
hlo�holo�icaI ada�tations Personal know►cd�c of re�ionsl plant commur.ities
Trhnical Literature Other(cx lain)
H��droph}•tic vegetation present7 ,'es no -
Ra:ionale for decision/Remari:s:
HI'DROLOGY
ls it cht gro��in� >eason�' ��es no V�'a►er Marls: ves r�o Stdimznt Dcposits: yes no
on
Bascd on: soil temp Irccord temp ) Drift Lines: �•es . o Dr�in1_e Patterns: yes no
o[htr(er lain)
Dept_�of inund�tion: --'Y inches Oxioiz�d Root(li�•c root Local Soil Sur�e��: ye no
�� ,�r� ,.��� Channels<12 in. vts no
�ic�th ro fr.e w•ater in pit: inchts Y�-'�" � FAC Ncutral: yes o W'a�zr-stainzd Le��•es ye no
th to saturatcd soiL `0_�incha {��D�6
Ch�ck all tha; apply 8c e�plain below�: Other(ezplain):
Str�am,Lakc or ga�e data:
Acrial hoco�ra hs: Other:
W�dand h�-drolo��• present? ��es no�
Ra:ionalc For dccision/Remart:s: --
' -
SO�
?rSap L'nit '�ame Draina�e Class
(Scrics c� P7ase)
Field observations con�irr� Yeti No
Taxonom.� tsubcroua) ma d t e''
Profile Description `
L}zpth H�rizon Ma�nx color !�Sottl:colors �loctlt abundance Texture, concretion�, Dra���in�of:oil
(inches) (;�4unseU (Mun�ell size g contr�st structure, ttc. profiie
� moist) moist) tmatch dcscription►
�
� � � I�R �/ ��?�R �l� � 5 �
� __
1 .
�
;
;
�
H��dric Soil Indicators: (check all that appl��)
Histosol Matrix chroma <_ ? with mon{es
Histic Epipcdon MQ or Fz Concrctio�s
Sulfidic Odor Hish Orsanic Content in Surfacc La��er of Sandv Soils
� Aquic Nfoisture Regime OrQanic Strcakin� in Sand�� Soils
R�ducina Condi�ions Listed on \ationaULoca! H��dric S��ils Lict
Glzv�d or Lo�i�-Chrom� {_i matri� Other i�xvlain in remarl:s)
H��dric soiLs present? .�� no .
Ratior.alz ior decision/Remarks:
�;'etland Determination (circle)
H�oroph��tic vt�e;ation present? � no
Hvdri: soils pr�sent? yes , o Is the samplir.g point �ts no
�'ztland h��droio�v resent'' cs no ���ithin a wetland^
RationalelRemarks:
tiOTES:
Revised 4/97
'
D�T.� FOR�1 1 (Rcvised)
Rourine��'etland Determination
{\�'.a State «�etland Dclinea0on h'fanual or
1487 Co s«etland Detineation ?�4anual)
pr�,�ject,�Sitc: '
Q1�z: ,�� � 7�n�
�� ��„
AppliranUoKrcr: S ' County: 1l ,
S;aie: /\���'(� ����ti'i-�fJ�J
tr.�esti_�co:(s): 5��:
�'.-.
� Do!�c�rrnal Cir.ums�ances tzisi on ih:sicc^ �es no Communit� ID: . .
i Is thc cice si�nificantl��di�turbed lat�picaJ siwa[ion i.' vts rtio f Tran�cct ID: '^ � `� _.
Is thc area a potenti�l P;obiem Area' ��es ��� Pioc 1D: •�1 � __ .. _
Fzpl�rsation of a:��pical or roblem arca-
`'EGETATION (For strata. indicnte T=vee: S = shrub: H = ntrb: V= vine)
Dominan� Piant S cciu Stratum �r :o�cr Indicator pominan[ Plant S�c�ics S[r�tum �c c���cr indi�l�or
i
._ � .� � ,� (/ �.�.�-
.�i'r� ��-�E'..: �' 3a �;-��/
,
�w�s-��. r � _� V � 1 �% '
� I
�
1
, ,
fiI�ROPfiI?IC �'EGETATIO� INDIC�TORS:
i
I �'.: o�dominanu OBL.F:�C�',b F.aC ���
� Ch��k all indicaiors that apply 8: ztplain belo«�: "'
Visual obsen-aeion of plant species�ro«in_ in Phvsiolo�ieaUreproduccit•e adapcations
are�� of profor.ged inundationl:aturatior. «'etland plant database
hfor,ho{o�icz!adapt�tions Pcrsonal I;nowicd=c of rc�ional plant c�mmur.itics
Tccfinical Li[erature Othcr(ex lain)
Hti•droph}•tic vegetation present' -es no •
Rationale for dccision/Rcmart:s:
H1'DROLOG�'
ls it tht�ro�:�ins sc:.son'' �es �7 �'ater Marks: ves �h Scdimcnt Dcposits: yes �rto
��'�' V on
Based on4�-f��� soil cemp lrecord temp ) Drift Lines: >�es o Draina==e P:,iterns: yes no
other(ex lainl
Dcpt.oi inund�tion: `— inchcs Oxidiz�d Root(fi��e roo Loca! Soil Su;ti•e�•: yes "o
� q- Channels<12 in_��zs
Dcpth to fr�t w'ater in pir. '�' inchts /� � FAC Neutral: ycs no Wacer-stainzd Lca�-es y�s no
th to satura�ed soii_ --inches
Chcck all that appiy &esplain below•: Other(ezpfain):
Su-cam,Lakc or gagc da�a:
Aer.al hoto�ra hs: Ocher:
Wedand h��drolo��� present° }'es no
Ra�ionalc for dccisionJFtzmar�:s:
'
i
lnit :�ame Drainase Class
, ;s 8: Phase)
Field observations con�irm Yes �;o �
Taronon:�� i sub�rou 1 map d tv e'' �
Profle Descrippon
I}`pth Honzon 11a[riz color Mottie colors �fotti: abvndance Ttxture, concretionc. Dr���in� of:oil
linches) (Munsell (Munsell �ize � contrast structure, ete. profilr
moistl moist) lmatch dcscription►
��?��� � l6`�K3/� ✓v
S-- / l� R 3 � S
� � \�\
�
;
, � � � �
, I
H��dric Soil In�icators: (chcck all that apply}
His�osol Matrix chcoma <_� with mottics
Histic Epipcdon M�or�z Concrtions
Sulfiaic Odor Hi�h Oroanic Content in Surfacc L��•cr of Sand��Soils
' Aquic Moisture Rcgimt Or�anic StreakinQ in Sand�� Soils
R{ducinQ Conditions Listed on \a[ionaULoc.al H�dric S��ils Li�t
Gltvtd or Low-Chroma(=1 matrix Other(zx lain in reinark5?
H��dric soiLs present? �•es no .
Rationalz for decision/Remarks:
«�etland Determirtation (circic)
Hydroph�tic vz�etation present? c no
Hydric soiis present? yes n ` Is the sampiin� point �es �
�'z[land h��droio�v resent? es o ��'ithin a wetland'' ���'
�
RationaleJRemarks:
?�OTES;
Revised 4/97
�
D�T.a F'OR\I 1 (Rrti•ued)
Routine��'etland Determination
t«�.a State ���etland Dclineaaon Manual or
148i Co s «�ed�nd Delineation Manuall
PniccUSi�c: �/� t�j Latt: � � / � � � `'�'
<{,�� /
Appiic�n:;owTcr ' County: �
Staic: � ���
Intes�i_ator(sl: G"�OU� S�,R:
Do!�c�rmal Circumstanccs tzist on thc site^. ���'' no Communit� ID� . _
Ls thc sitt si�nificantl�•discu;�d �a���ical situa�ionti.' yt> o T,-ansr:� iD: �� �� -.
Is �h-arca a poirnti�l Problcm Area' yc� no, �r(� Plor ID: ` _
E��►ar.�tion of ac�•�i��l or roblcm arca: tJ
�'EGET.aTtON (For stra:a, indicate T=vice: S = shrub: H =hcrb:V-vine)
Domin�nt Pian: S �cics S;ratum 4c co�cr indicaror pomir.ant Plant Svccia Str�ium �ic co�•cr [ndi�ator
_� � r� �TC I
�
, 1J � � �:��';
� � � � ,�� ��;�' ;
�\(n.�"vt. I ,,l( �` ��:L-�'"�
� �
�
Fi1'DROPEi1TIC �'EGETATIO'� I\DIC�TORS:
�'2 of dominancs OBL.F.�+C�?.',� F:�C�
Chtck all indi;ators that zppf}•c� txptain bcio«:
Visuai obs�n�ation of plant spe:izs�ro�ti�in� ir, Ph�-siolo�icaUrcproducti�•c adapta�ions
are�c of prolonsed inundation/:�tur�tior, �l�ztland ptant database
Jvlo�hoio�i:a1 adaptations Pzrsonal knowlcdgc of re_ional piant rnmmur.itics
Te�hnical Litzraturc Othcr{cc lain)
H��droph}2ic �egetation present7 �•es no
Racionalc fo:decision/R:marl:s:
HZ'DROLOGY
is it tf�z gro�in� scson' �-zs no �'aier hlarks: vcs no Stdim:nt Dtposits: yes o
on
B�d on: soil tzmp(record ttmp ) Drift Lines; ��cs no Drain���e P:,tterns: ves no
othzr(tz laini
Degt.'of inundation: �' inches Oxiaized Root{ii•�c root Local Soil Sur�e��: yes n�
1� �,� n Channels<12 in. ��es n
D:pth to fret k•ater in pit: � inch.s�/i' w r"`"" FAC!vwtral: y�es no Wa�er-stained Lea�•es yc no
th io saturaced soii: �— inches
Chcck all that apply &e�plain belo��: Oeher(ezplain):
Stream,Lake or gage daca:
Aer,al hoto�ra hs' Other
We[land h�'drolog�� present' }�es no
Rationale for dccision/Remari:s:
� -
cotLS i
�lap Unit '�ame Drainage Class
(Serics g Phase)
Field obsen•ations conCirm Yes r;o
T�.ronom�• (suoorou ) ma d tvpe"'
Profle Description
D�pth Horizon Matrix color '�tottle color �lotti: abundance T-xture,concretionc. Dra��in� of:oil
tinches) (MunseU (Mun«II size 8: contrast � structure, ctc. profilr
moist) mois[) (match dcscriotion�
�'=7� �-5� 3 - � - �'�� �
,
�
r
f f �
I �
�
Hydric Soi1 Indicators: (chcck all chac apply)
Histosol 'vSa�rix chrom� <_ ? with mottles
Histic Epip�don Mg or Fe Concretior.s
Sulfidic Odot HiQh O:�anic Contcnt in Surfacc L���cr ot"Sandv Soils
Aquic Mois[ure Rcgimz Oroanic Stre�kinQ in Sand}' Soils .
Re�ucins Condi�ions L:sted on \acionat/Loca! H�dric S��ils Li�t
Glzvtd or Low-Chroma !=1} matri� Other(e� lain in rernarks) .
H��dric soits present' �•es o .
Rationalz for de�ision/Remarks:
�i'etEand Determination (circle)
H�droph�-tic ve?ecation prexnt° ycs no
Hydric soils present? yes . Is the samplin� point �zs no
Vr'ettand h�•drolo�v resent? vcs �t�ithin a wetland^
RationalelRemarks:
_ ' j
tiOTES:
Revised 4/97
'
A�'PENDIX 2
WETLAND RATII�IG FOR1Vt - WEST�R.N WASHII�IGTON
(DRAFr -ALIGUST 2004)
Page 11
'
�'�'F.TL��D RATING FORM- W�STER'v VVASHINGTON
Name of wetland(if know-n): ���G�it_� /-(�- ff 1ti�-� �`��^11 'v��l �/�L'`-�'—.
. ,
Location: SEC: _TVvNSHI': _R�jGE: _(attach map with outline of wetland to rating form)
Person(s)Rating�T�'etland: ��Jo� Affiliation. 1/1/�.5 Date of site visit: ��S/d �f�
DI�F�' 5�.�����' OF' It.�T'I'_�1 G
��tegQ�-� b�s�� on �i�TIO?�S �rovided bd wetland
I � III �
Score for��'ater Quality Functions ; �
Categor�� I= Score >70 � �
Category II= Scare 51-69 Score for Hydrologic Functions � �
Cate�ory ll[ = Score 30-50 Score for Habitat Functions � �U
Cate�ory 11� = Score < 30 'I'Q,'�'A�, score for fuuctions i
� �
�aQe�ory b�sed on SPL,��I, C'��AC"�"E�STICS of wetland �
I II �Aoes not Appl�-
�lI�a� C����O�'�' (choose the "hig�est" category from al�o��e) �
Check the appropriate type and class of wetland being rated.
'�'��p1 '�u• �, "-rF.f���.�?�2 �` � `-� � �� C-�,(�{y•�p.�e'�� as _ ��• _ ;�"�3'r
Y��a�A '4 f e Y«. ��� }�'hy.�'i� �'„'MM�,#„' A,.
Estuarine De ressional
Natural Herita e VVet{and Riverine
Bo Lake-frin e
Mature Forest Slo e
Old Grow�th Forest Ftats
Coastal La oon Freshrvater Tidal
Interdunal
None of the above
�k�etl�nd i ating Form- western�k'ashin�ton : August ZOU4
'
Does the �i�etlaud being rated meet any of tt�e criteria below?
Lf you answe.r YES to any of the questions below you ��ill need to protect tlle ��etland
according to the regulations regarding the special characteristics found in the wetland.
I __ (.'heck List �or �'�etlan�s Tl�at�eed S�ecii�l P1•otection, ai�� YES I`'O �
Tliat_-�►•e �'bt Inclucled in tl�e,Ratin� -
� „ — � ;
.SP1. HGS Zj1L' 11'Et/Q'1�7 'JfC!� G7�C>C7i111E'):tBC�QS Cl /.'U�7i��U1.�Ut" (lfZl� I'f'�CYUi1l l�7STBC� ��
Threatened or Endan�erea'plartt or anilr.al species (TiE species�"' �
For the purposes of this rating system, "documented" means the wetland is on tlie I/ �
appropriate state or federal database. I
SP2. Has the �vetland been documenied as habitat for any State lrsted Threatened or
F.ndangered plant or a��imal species? V�
For the purposes of this rating system, "documented" means the wetland is on the �
i appropriate state database.
SP3. Does the wetland contain individuals of Prioriry species listed by the l�TDFi3%
1�or-the state? �'�
SP4. Does the ia-etland have a local signrficance in additio�z to its functions? For
example, the wetland l�as been identified in the Shoreline Master Program, V�
the Critical Areas Urdinance, or in a locat management plan as having
�pecial si�nificance. '�
To contplere tlze t1�xt pa�rt ot�the data sl�eet ��ou lvill �ieed to deler�nine tite
Hvdro eornorphic Class o�the wetland bein rated.
The hydrogeomorphic classification groups wetlands into those that function in similar«-ays. This
simplifies the questions needed to answer how well the wetland functions. The Hydrogeomoiphic
Class of a wetland can be deternuned usuig the key below. See p. 24 for more detailed instructions
on classifying wetlands.
' '�
.- '
I � ;
i �
i
I .
�Vetland Rating Form—westem VJashington 2 August 2004
Classificatio� of Vegetated Wetlands for VVestern Washington
��'etland �ame: Date:
1. .�i�-�a ���:ter le�ei> in the���etland usually controlled by tides (i.e. except during floods)? ,
,,?��� go to �' I'ES—the��etland class is Tidal Fringe ��,
I f yes, is the salinity of the water during periods of annual lo��flo��-below 0.5 ppt(parts per ,
tilousand}? YES—Fresh�i�ater Tidal Fringe NO—Saltwater Tidal Fringe (Estuarine)
l;:vour n etland can be classifzed as a Freshlrater Tidal Fr�inge use the forms for River•ine
,�etlands. If it is Salt�vater Tidal Fringe it is r•ared as ar�Estunrine wetland. Wetlands that
«�ere called esivarine in the first and second editions of the rating sy�stem are called Salt
��'aler Tidal Fringe in the Hydrogeomorphic Classification. Estuarine�-etlands were
categorized separately in ihe earlier editions,and tlus separation is beii�g kept in this
revision. To maintain consistency between editions,tl�e terrn"Estuarine" wetland is kept.
Please note, howe`-er,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 so�uce {>90%)of water to it.
NO—go to 3 YES The wetland class is I'lats
If your wetland can be classified as a"Fla[s"wetland, use the fonn for Depressional
wetlands.
3. L)oes the���etland meet both of the followin2 criteria?
_The vegetated part of the wetland is on the shores of a body of open water (wit�iout 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)?
NO—go to 4 Y�ES—The wetland class is Lake-fringe (Lacustrine Fringe)
4. Dues the wetland meet all of the following criteria?
The tiTetiand is on a slope (slope can 6e very gradz�a�,
The water flows through the wetland in one directian (unidirectional) a�Id usually
comes from seeps. It ma�- flow subsurface, as sheetflow, or in a swale «,�ithout distinct
L�anks.
The water leaves the wetland without being impounded?
�OTE: Surface water does not pond in these type of wetlands except occasionallv in
very small and shallow depressions or behind hummocks(depressions are usually
�3ft diameter and less than 1 foot deep).
NO - go to 5 YES —The w�etland class is Slope
S. Is the wetland in a valley, or stream channel, where it gets inundated by overbank flooding from
that stream or river? Tl�e floading should occur at least once every tt�vo years, on the average,to
ans��er "yes." The wetland can contain depressions that are filled tirith�-ater��hen the river is
�7ot flooding.
NO - ffo to 6 1'ES—The v�etland class is Riverine
'��'e'land Kat:ng Fvrm - ���stern�'�asl�inet��� _ ,tiugtis: 200-�
6. ls the ��etlancl in a topographic depression in ���hic11 v��ater ponds, or is saturated to the surface, at
soine time of the year. Tlzis rnea��s tlzat any outlet, if p�•eserat, is higher than the inte?�io�•of the
���elland.
NO— go to 7 ��S —The ��vetland class is Depression�l
7. Is the wetland located in a ti�ery flat area�i�ith no ob�ious depression and no stream or river
ruiuling through it and pro�-iding water. The wetland seems to be maintained b�� high
groundwater in the area. The wetland may be ditched, but has no obvious natural outlet.
NO— go to 8 I'�S—The wetland class is Depressional
8. Your wetland seems to be difficult to classify. For example, seeps at the base of a siope may
grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of
flooding along its sides. Sometimes we fmd characteristics of several different hydrogeomorphic
classes �.rithin one wetland boundary. Use the following table to identify the appropriate class to
use for the rating systein if you have several HG?v1 classes present within your wetland. NOTE:
L se this table only if tlie class that is recommende.d in the second column represents 10% or more
of the total area of the �i�etland being rated. If the area of the second class is less than 10% classify
ti�e wetland using the first class.
H�11%I CJ`asses �IfITZ�3l�DE�I72Cfl1�'E����LlYtll�.${�9173C1�1�1,��, C�A'��'t0` ,�� rtz;�a�r�aa �.�,.,�;���,�t
� Slope + Riverine Riverine
I Slope + Depressional Depressional
Slope +Lake-fi-inge Lal:e-fringe
Depressional +Riverine aiong stream within boundary Depressional
I�epressional+ Lake-fringe Depressional
' Salt ���ater Tidal Fringe and any other class of freshwater Treat as ESTUARINE under
���etland w�e2lands with special
�
characteristics
li you are unable still to determine which of the above criteria apply to your wetland, or you have
�i�ore than 2 HGM classes ��ithin a���etland boundary, classify the wetland as Depressioual for
the ratulg_
��':tluud Rating ro:m— western '���a�liin�ux� =1 August?004
D;;,. Depressior�ai:and Flats L�'etlands :�Y ,; - : '��Po�nts�::=i I
� r,: _ .. .., -� . . �
� ` V�;�TER QU,ALI7`�"I'L�C"I�(C)I�iS - lndi�ators that �vetland functions*fo imprc��-e . . I
i
, ���afer qualit�- _ _ - I
]� �� D 1. Does the H�etland ha��e the �otential to improve nater quatit��? (sce p. 3b') � ��
� -
� D 1.1 Characteristics of surface �i�ater flo�vs out of the wetland:
' Wetland is a depression with no surface water outlet points =
i D VJetland has an internuttently flowing, or highly constricted, outlet points `2
� Wetland has an unconstricted surface outlet points= 1 ''
Wetland is flat and has no obvious outlet and/or outlet is a ditch oints = 1 I
D 12 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 Characteristics of persistent vegetation(emergent, shrub, and/or forest class):
� V��etland has persistent, ungrazed, vegetation>= 95% of area points—
i � Wetland has persistent, ungrazed,vegetation> = 1/2 of area points Z3�
i Z��etland has persistent,ungrazed vegetation> = 1/10 of area points= 1
Wetland has persistent,ungrazed vegetation<1/10 of area points= 0
Dl.4 Characteristics of seasonal ponding or inundation.
D This is the area of the welland that is ponded for at least 2 months, but dries out
sometime during the year. Do nox count the area that is permanently ponded.
Eslimate area as the cn�erage condition � out of 10 yrs.
Area.seasonally ponded is > 1/2 total area of wetland points=��
Area seasonally ponded is> '/4 total area of wetland points=2
Area seasonally ponded is<'/4 total area of wetland points= 0
NOTE: See text for•indicators of seasonal and permanent inundation..
D Total for D 1 Add the points in the boxes above � �
D D 2. Does the wetland ha��e the opportunitv to improve water qualit��? (see p. 44)
Ans�ler YES if you know or believe there are pollutants in groundwater or surface
water coming into the�;retland that would othervvise reduce water quality in
streams, lakes or groundwater downgradient from the wetland?h`ote which of the
follotivin conditions provide the sources of pollurants.
�azing in the wetland or within 150$
� Untreated stormwater discharges to wetland
— Tilled fields or orchards within 150 ft of wetland
— A stream or culvert discharges into wetland that drains developed areas,
residentiai areas, farmed fields,roads, or clear-cut logging
— Residential, urban areas, golf courses are within 150 $ 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 Dl by D? �/'
Add score to table on . 1 ��
��'etlaud Rating Form-tivestem�l ashington � .4ugust 20U4
� j� lle�ressional and Tlats !'4'etlal�d5 � �` � ; # Po�nts,
_ �4 " 'R' -� r ,h.
. . s� - -�... .c � � . ,. .1�'r`- �+ ,u#,o,,ery^.,,Y .�S.�': ��: � � �z.Jr`�r..l�����a- ..`<�.
! HYDROLOGIC FI.7NCTI()NS - Indicators tt�at we2laud functions,to�reduce " .
"�loodin�and stream dc�rada�on `�
ll 3. lloes t}�e ���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«�ater outlet points=4
Wetland has an intermittently flowing, or highly constricted, outlet points �?j
V4'etland is flat and has no ob�-ious outlet and:�or outle2 is a sinall ditch points �� �,
Vti'etland has an unconstricted surface outlet oints=0 d—
D D 3.2 Depth of storage during wet periods
Estimate the height ofponding above the bottom of the outlet
Marks of ponding are 3 ft or more abo��e the surface points= 7
The wetland is a "headwater"wetland" points=5
Marks of ponding betvveen 2 ft to<3 fr from surface points�$
�
Marks are at least 0.5 ft to <2 ft from surface points �`�
Wetiand is flat but has small depressions on the surface that trap v�-ater 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 upstream basin contributing surface��ater•to the �
wetland to the area of the u%etdar2d itself. I
The area of the basin is less than 10 times the area of wetland points= 5 �
IThe 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� �
� Wetland is in the FLATS class (basin=the�vetland, by defmition) points = 5
� D Total for D 3 Add the points in the boxes above �'
j� D 4. Does the wetland have the opnortunity to reduce flooding and erosion?
(see p. 49)
Answer YES if the wetland is in a location in the watershed where the flood
storage, or reduction in water velocity, it provides helps protect downstrezm
� propertv and aquatic resources from flooding or excessive and/or erosive flows.
Ansv��er NO if the water 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.
R�ote tivhich of the following indicators of opportunity apply.
—�VVetland 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 water that might
otherwise flow into a river or stream that has flooding problems �
ther
multiplier is 2 NO multi lier is 1
D TOTAL -Hydrologic Funcdons Multiply the score from D 3 by D 4 � �
Add score to table on p. 1 �
��'etland Rating Form—western���ashington 6 August�00�1
Tli�se. �uesfiorrs a 1 fa�ti�e�lnnds U .<tll I�G'YT classec� �: �`; �'�"n�� '
- - _. . ._ ..- . _•._.. .,. ,.�•�r_..._ t::
• '
:I.
y , , P�3 .. ..-. .� _ . .f._. -; � . _._. . ......z. . . . : _ _
I-3Af3TI:AT F�;:tiCTIO'ti`S - Cndicaiors that���etland I�uzlctions to pro�'ide im�ortant habii�it
�� -
H 1. Does the �►etland ha�-e tl�e potential to pro�ide habitat for man� species°
H 1.1 Ve�etation structure (see p. 72)
Check the types of vege.tation classes present (as de��ied by Cowardin) i�the class
covers more than 10% of the area of the wetland or j/ acre.
�'Aquatic bed
mergent plants
Scrub/shrub (areas where shrubs have >30% cover)
Forested(areaswhere trees have >30% cover)
Forested areas have 3 out of 5 strata(canopy, sub-canopy, shrubs,herbaceous,
moss,�ground-cover)
Add the number of vegetation types that qualify. If you have:
4 types or more points=4
3 types points—
2 types points � l
� 1 t�pe points=0
H 1_2. Hvdroperiods (see p. 73)
Check the t�.pes of��ater regimes (hydroperiodsj present within the wetland. The
waler regime has to cover more than 10% of the wetland or'/ acre 10 count. (see text
for descriptions of hydroperiodsj
�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 wetland
Seasonaliy flowing stream in, or adjacent to,the wetland �.
Lake fringe wetlanri =2 points
Freshwater tidal wetland=2 points
' H 13. 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 meet the size threshold)
You do not have to name the species.
Do not include Eurasian Milfoil, reed canarygrass,purple loosestrife, Canadian
Thistle
If you counted: > 19 species points =2
List species below if you K�ant to: 5 - 19 species points�
<5 species points= 0
l
4L�Ctland Rating Fonn—���estem ���ashin�on 13 Augiist 2004
H 1.4. Interspersion of habitats (see p. ;6)
Decide from the diagrams belo�;��;�hether interspersion bet«�een t}pes of vegetation �
(described in H 1.1), or vegetation types and unvegetated areas (can include open
,
vc�ater or mudflats} is high, medium,low, or none. i
, ,:,_�
None= 0 points Lo�� = 1 �c�int :�ioderate = 2 points I
��: �����
����;.
/�� F,�'t��:s' 4t�.,Y.�'-:';�4.aY'.. _
� - r '
"�<
"; �' w�a�,",::
, � I
'� .r�:>��,r..
i �,.
i
_ I
�� [riparian braided channels]
High = 3 points
NOTE: If you have four or more vegetation t}pes or three vegetation types �
and open water the rating is always "high".
H 1.�. Special Habitat Features: (see p. 77)
Check 1he habitat features that are present in the wetland. The number of checks is I
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 bottoin> 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
��nning (>30degree slope) OR signs of recent beaver activity are present
t least �/4 acre of thin-stemmed persistent vegetation or woody branches are present
in areas that are permanently or seasonall�inundated(structures for•egg-laying by
amphibiansj
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
VVetland Rating Form—westem Vtiashington 14 August 2004
H 2. Does the wettand t�a�e tlie opportunity to provide habitat for many species? �
H 2.1 Buffers (see p. 80) �
Choose the description that best represents condition of buffer of wetland. The highest �
scoring criterion that applies to the x�etland is to be used in the rating. See text for
de�nition of"undisturbed. " �
— 100 m (330ft) of relatively undisturbed vegetated areas, rocky areas, or open water j
>95% of circumference. No developed areas within undisturbed part of buffer. M
(relatively� undisturbed also means no-grazing) Points=5 i
— 100 m (330 ft) of relatively undisnubed vegetated areas, rocky areas,or open water !
> 50% circumference. Poiuts =4
— 50 m(170ft) of relatively undisturbed �-egetated areas,rocky areas,or open water I
>95% circwnference. Points=4
— 100 m(330$} of relatively undisturbed vegetated areas, rocky areas, or open water
> 25% circumference, . Points =3 I
— 50 m (170ft) of relatively undisturbed ��egetated areas,rocky areas,or open water
for> ti0% circumference. Points= 3 i
If buffer does not meet any of the criteria above �
— ?�'o paved areas (exc.ept paved trails)or buildings within 25 m(80ft) of vvetland> i
95°�o circumference. Light to moderate grazing, or lav�rns are OK. Points = 2
— No paved areas or buildings within 50m of wetland for>504% circumference. ,
L'� t to moderate grazing,or la�ims are OK. Points = 2 i
— eavy grazing in buffer. Points = 1 �
�– Vegetated buffers are<2m wide (6.68) for more than 95%of the circumference �
(e.g. tilled fields,paving, basalt bedrock extend to edge of��etland Points=0. i
— Buffer does not meet any of the criteria above. Points = 1 � �
H 2.2 Corridors and Connections (see p. 81) j
H 22.1 Is the wetland part of a relatively undisturbed and unbroken vegetated
corridor (either riparian or upland)that is at least 150 $wide,has at least 30% cover
of shrubs, forest or native undisturbed prauie,that cormects to estuaries, other ,
wetlands or undisturbed uplands that are at least 2�0 acres in size? (dams in riparian
corridors, hem�ily used gravel roads,paved f•oads, are con.sidered breaks in the
corridor).
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
comdor(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
undishubed corridor as in the question above?
YES =2 points (go to H 2.3) NO=H 2.2.3
H 2.2.3 Is the wetland:
within � 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?
i
YES = 1 point O�0 oints
Wetland Rating Form-westem�Vashington 15 August 2004
�H �.� �e..r or adjacent to o:her priorit�� habitats listed b�� ���'DT«� (see p. S') �
VVhich of the following priorit}�habitats are within 330ft(100m1 of the wetland? �
(see text for a more detailed description of these priorin�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: Greater 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, fornung a multi-layered canopy v4�ith occasional small openings;with at '
least 20 treesr'ha (8 trees/acre)> 8l cm (32 in} dbh or>200 years of age.
1��Tature forests: Stands with average diameters exceeding 53 cm(21 in) dbh; crovvn
�
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-gro��th; 80- 200 years old west of the Cascade crest.
Prairies: Relatively undisturbed areas(as indicated by doininance of native plants)
where grasses and/ar forbs form the natural climax plant community. ;
Talus: Homogenous areas of rock rubble ranging in average size 0.15 - 2.0 m(0.5 - �
6.5 ft), composed of basalt,andesite, and'or sedimentar��rock, including riprap �
slides and mine tailings. R•1ay be associated with cliffs.
Caves: A naturally occurring cavity,recess, void, or system of interconnected
passages
Oregon white Oak: Woodlands Stands of pure oak or oak/conifer associations
where canopy co�erage of the oak component of the stand is 25%.
Urban �atural Opeu 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; andlor the open space is an isolated remnant of natural
habitat larger than 4 ha(10 acres) and is surrounded by urban development.
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal��vetlands,usualiy
semi-enclosed by land but with open,partly obstructed or sporadic access to the
open ocean, and in vvhich 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 0.5ppt. during the period of average annual
lowr flow. Includes both estuaries and lagoons.
�'Iarine/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 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 priority habitats=3 points �
If wetland has 1 prioritv habitat= 1 point I�To habitats=0 points
VS%etland Rating Form—westem Washington 16 August 2004
. I
�'--� � �
H 2.4 Wetland Landsc�e (choose the one description of the landscape around ihe
ivetland that best fits) (see p. 84)
There are at least 3 other wetlands «�ithin li�mile, and the connections between them
are relatively undisturbed(light grazing between v��etlands OK, as is Iake share v��ith
some boating, but connections should NOT be bisected by pa�-ed roads,fill, fields,
or other de�relopment. points= 5
The wetland is Lake-fringe on a lake with little disturbance and there are 3 o#her lake-
fringe wetlands within 1/�mile points=5
There are at least 3 other wetlands «�ithin 1/z mile,BL�the connections between t
are disturbed points�
The wetland is Lake-fringe on a lake�r�itt� disturbance and there are 3 other lake-
fi-inge wetland within 1/2 mile points =3
There is at least 1 wetland��ithin 1/2 mile. � points=2
There are no «-etlands within%z 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 l,H 2 and record the result on
� p. 1 i�
;
ti�'etlan�Rating Form—v�-este�Vv ashington ;7 August 2004
I
I I�
,
I
CATEG4RIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if tlie wetland meets the attributes descrrbed below and circle the
appropf•iate ar:swers artd Categor��.
�'4'etland:T��pe ,< _ � _ .;, -Category '�
C'heck o�f af�ti�.ct-ite��ia tliat a�plt�ra tlte tii�etlaj�c�.� Car cle tl�e cippropt�2ute.Categor-yt; _ _ �
, : _ 1
�tiaihen 17�e a r-o. ric�fe cr�iteria a,-e met. � � � �� _
SC 1.0 Estuarine wetlands (see p. 86�
Does the wetland meet the follawing criteria for Estuarine wetlands? _
— The dominant water regime is tidal, �
� — Vegetated,and
— V�'ith a salinity geater than 0.� ppt. �
YES = Go to SC 1.1 I`TO
SC 1.1 Is the wetland within a National VVildlife Refuge,National Park,
National Estuar�Resen�e,Natural Area Preserve, State Park or Educational, Cat. I
Environmental,or Scientific Reserve designated under VVAC 332-30-151?
YES = Categorv 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
following three conditions? YES = Category I NO= Category II , Cat. I '
—The wetland is relatively undisturbed (has no diking, ditching,filliug, Cat. II
culti�ration,grazing, and has less than 10% cover of non-native plant
species. If the non-native Spar�tina spp. are the only species that cover
more than 10% of the wetland, then the wetland should be given a dual Duai
rating (I/II). The area of Spartina would be rated a Category Il while tlie rafing
relatively undisturbed upper marsh with native species would be a � L,�
Category I. Do not,ho�rever, exclude the area of Spartina in
detennining the size tlu�eshold 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 following features: tidal channels,
depressions with open��ater, or contiguous freshwater�retlands.
•�.,Y�r.:�s ...rta.3^^ $. '4''�--.�i, „4,41...s:u.¢ ..1:�'; wi .S�a`�'ioo::`P.pr�?_;Sa
�
�
I �
_..1 '
.�
Wetlaud Rating Form—westem Washington 18 August 2004
WETLAND RATING FORM—�'4'ESTERN �'VASHL'VGTON
I�Tame of wetland (if l:nown): _ ��/�Q/12�� � l 1/L� / S � ''�'�i.� ;��'.�`E'—
Location: SEC: _TV41v SHP: _RNGE: _(a'ttach map with outline of wetland to rating form)
Person(s) Rating Wetland: �=�o��� Affiliation: ��-S Date of site visit: ���j��
DI�F'I' S�T?���RY �F 12�T`I'_v1�
Categorg� b�se� o� 1�i�1C'I'TONS p�-o��ded by wetland
I II III IV
Score for VJater Quaiity FuncCions
Category I= Score>70
Category II= Score 51-69 Score for Hydrologic Functions
Category = Score 30-50 Score for Habitat�unctions
Cate�or 'TV — Score < 30 ����, score for f'unctions 2�
�ategor3� �asec� ot� SPEC'�L CHA.I�r�C�'�l�S�TICS of wetla�d
I II IDoes no# Apply
��a� Category (choose the "highest" categor-y from aUove) �
Check the appropriate type and class of wetland being rated. I
rs ��A�-�4� �� � � - •� �,A� � �.
� + � .� �: ...+�. r. ...�.
Estuarine De ressional�
Natural Heritage VVetland Riverine
Bo Lake-frivae
Mature Forest Slo e
Old Growth Forest Flats
Coastal La oon Freshwater TidaI
Interdunal
None of the above
V�'ecland Ratine Form—�i�estem Washington l August?G04
Does tl�e wetland beiug rated meet any of tlie criteria below?
If}-ou ans���er YES to any or the questions below}�ou���ill need to protect the wetland
accordin�to the regulations regas•ding the special characteristics found in the ���etland.
= � Check List�for «�etl.�nds Tliat Need�Special Protection, aud����'ES ���� N0 �
,..: That�re '\`ot Includc� in the Ratin� �
� +
SPl. flas the �vetla��d bee��i cz'ucul�7e�uc�f czs a habitat for ar�;�Feder�al�v��sted
Threatened or Endarr�ered planr or a�limal species (7;�E species)? I
For the purposes of this rating system, "documented" means the wetland is on the
�
appropriate state or federal database.
SP2. Has the wetland been documented as habitatfor any State listed Threatened or
Endangered plant or anin�al species?
For the puiposes of this rating system, "documented" means the wetland is on the
ap ropriate state database. i
SP3. Does the welland coiztain individuals of Priority species listed dy the Y�DFW
for the state? ,
SP4. Does the �vetlancl have a local signifrcance in addition to its functions? For ;
, example, the wetland has been identified in the Shoreline Master Program,
the Ccitical Areas Ordinance, o:•in a local manageinent plan as ha�,ring
� Special significance. , ;
T'o co��7��lete ��l�e next part ot�tlze data slzeet 1�oi� 11•ill f�eed to dete�•r�lifze rize
H�dr•ogeor��os•pl�ic Class of tl�e tivetla�id berf�.� ;�ated.
The I�ydrogean�orphic classification groups ���etlands into tl�o�e that f.�nction in similar «-avs. Tliis
simplifies the questions needed to answer hovv well the w�etland functions. The Hydrogeomorphic
Class of a wetland can be determined using the key below. See p. 24 for more detailed instructions
on clas�if��in� «�etlands.
�':"etland hatinc torm— �,�c�tem ���'aslungtor. _ ,^�ugust 20U4
Classification of Vegetated VVetlands for Western 'w'ashiugton
WetlandName: �.��(,(/�}�_�j__ Date: �����'
1. Are the ��ater levels in the wetiand usuall��controlled by tides (i.e. except during flaods}^
I�O— Do to 2 YES—the wetland class is Tidal Fringe
If yes, is the salinitl�of the water during pe�-iods � ual low flaw below 0.5 ppt (parts per
thousand)? YES—Freshwater Tidal Fringe NO Saltwater Tidal Fringe(Estuarine)
ff yoi�r�vetland can be class f ed as a Freshivater Tidal Fringe use the forms_for Riverine
wetlancls. If it is Salt�%ater Tidal Fringe it is rated as an Estuarine lvetland. ti'4'etlands that
were called estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fruige in the Hydrogeomor�hic Classification. Estuarine wetlands were
categorized separately in the earlier editions, and this separation is being kept in this
re�ision. To maintain consistency betu�een editions, the term"Estuarine" wetland is kept.
Please note, ho�vever,that rhe characteristics that define Category I and II estuarine
�.
wetlands have changed (see p. ).
2. Is�iie t ography within the wetland flat an�precipitation is only- source (>90%) of«�ater to it.
�NO go to 3 YES—The wetland class is Flats
If your v��etland can Ue classified as a "Flats"�retland, use the form for Depressional
vt�etlands.
, 3. Does the wetland meet both of the following criteria?
_The vegetated part of tlie ���etland is on the shores of a bodv 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°�0 of the open v�:ater area is de.eper tiian 6.6 ft(2 m)?
� N — go to 4 YES—The t��etland class is Lake-fringe (Lacustrine Fringe)
4. Does the etland meet all of the following criteria?
�The wetland is on a slope (sZope can be very gradual},
�'The water flows through the wetland in one direction (unidirectional) and usually
�comes fr•om seeps. It may flow subsurface, as sheetflow, or in a swale without distinct
banl:s.
The water leaves the wetland without being impounded?
NOTE: Surface �vater does not pond in these t�-pe o.f wetlands except occasianally in
very sn1a11 and shallotiv depressions or behind hunzmocks{depressions ar-e usz�ally
<3ft di ��and less than 1 foot deep).
NO - go to � YESi The wetland class is Slope
S. Is the wetland in a ley, or stream channel, where it gets inundated by overbank flooding from
that siream or river? The flooding should occur at Ieast once every t��o years, on the average,to
answer "yes." The wetland can contain depressions that are filled with�vater when the river is
rzot flooding.
NO - go to 6 YES—The u etland class is Riverine
«-etland Rating F�ornl—���estern�Vashing:on 3 August 2(1'14
6. Is the wetland in a topographic depression in wl�ich water ponds, or is saturated to the surface, at
some time of the year. 7'his means that any outlet, if presef�t, is 17ighe;�tha�� tl�e intef�ior o{tl:e
wetland. �
NO— go to 7 YES —The wetland class is Depressional
7. Is the wetland located in a very flat area wit1�no obvious depression and no stream or river
running throu�h it and pro�riding water. The wetland seems to be maintained by high
groundwater in the. area. T1�e uretland may be ditched,but has no ob�-ious natural outlet.
I`O—go to 8 YES—The«�etland class is Depi•essional
8. Your wetland seems to be difficult to classify. For example, seeps at the base of a slope ma�
grade into a riverine floodplain, or a small stream w�ithin a depressional wetland has a zone of
flooding along its sides. Sometimes we fmd characteristic's of several different hydrogeomor�:hic
classes withui one wetland boundary. Use the following table 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 coIumn represents 10% or more
of the total area of the wetland being rate.d. If the area of the second class is less than 10% classify
the �vetland using the first class.
:HGtti�C7ri,�ses �it�z�z a,��Izn�atec�,Wet�and Biiundai� ,_ r; -" ClrrsS to.�'s��?�Rrrt;n ; _ •
Slope + Riverine Riverine
Slope + Depressional Depressional
Slope+ Lake-fruige Lake-fringe
Depressional +Riverine along st��eam���ithui boundary Depressional
Depressional +Lake-fringe Depressional �
Salt VJater 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 wTetland; or you have
inore than 2 HGI�T classes within a wetland boundary, classify the ��etland as Depressional for
the rating.
W edand Rating Form—western VUashington 4 August 2004
� �lope�'�'etl�inds . e
��'x �; � x �� Prixnrs i
- r' e " -. `z
ti. � � __ �
(. ..._. ..� :-_ -'+. ,. '_., . �� ... '_ . . . _ .�.4 i�.... _ _ '-, < . -.,;o. ��,. ,- ,_.,.� ^y^:',3 t F ,�,i
� �-� WAT�R QU AI,1'FY �LT��;CT10NS �- Indicators�thaf wetland funefions to� ;._�
impro�-e water qualit� . _ �;,,,I
S S l. Doe� tl�e ��etland lia�e tl�e potential to impro��e Nater qualit��:' (see p. 64� _ ;>: �
i
S S 1.1 Cbaracteristics of average slope of wetland:
Slope isl% or less (a 1%slope has a 1 foot vertical drop in elevation for every
100�t horizontal distance} ....... .............................. points�
. Slope is 1% - 2% points – �
Slope is 2% - S% points = 1
Slope is greater than 5°io points=0 �;
i
S S 12 The soil 2 inches below the surface is clay, organic, or smells anoxic '
(hydrogen sulfide or rotten eggs). �
YES = 3 oints NO=0 points
S S 1.3 Characteristics of the vegetation in the wetland that trap sed'unents and
pollutants:
Choose the points appropriate for the description that best fits the vegetation in
the wetland. Dense vegetation means ti�ou have trouble seeirzg the soil surface.
Dense, ungrazed,herbaceous vegetation>90% of the wetland area points= 6 ',
Dense,ungrazed,herbaceous vegetation> 1/2 of area points= 3 I
Dense, woody, vegetation> '/2 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 know or believe there are poilutants in groundwater or surface
water caming into the wetland that would otherwise reduce water quality in
streams, lakes or groundwater downgradient from t1�e wetland?11�'ote 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 150 feet of vvetland
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
a'eUand Rating Form—westem Washington 11 August 2004
� Slope ti'�etlauds , < �.�� f P{�znts
e- 4 r.F ro °� � � S�, k r ``- r ��.} -��c.--f v�
�� a � �
. .�e,�;;:.
,.Z,+F ._...i.:t.e a, ,. . _a t�- 6:-x: `s;: �n,•- - - _ � „ � f'"P�_'3 , ✓. Y -�1 �.LF.� 7�3d,s��i.�'�:r�.c �
ay...,..., .. ..., , ...�r _, .:, .. .F,.. r.-; ,.< .,;.
`; �-IYDROLUGIC FL'�CTIONS� - Ineiicators that w�efland'fiuictions to reduce`�' �
' ' floociin� ard streatn erosivn �
S 3. Does the ��etland ha�e tt�e potential to rcduce floudin� and strcam 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 x�etland.
Dense,uncut, rigid vegetation covers > 90% of the area of the wetland.
(stems of plants should be thick enough (usually> I/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 points=0
S S 3.2 Characteristics of slope v�=etland that holds back small amounts of flood
flows:
The slope w�etland has small surface depressions that can retain water o at
least 10% of its area. YES points�2 ,�
NO points=0 v/
S Add the paints in the boxes above '
� S S 4. Does the wetland have tLe opportunit�- to reduce flooding and erosion?
� (see p. 70)
Is the�vetland in a landscape position where the reduction in water velocity it
providQs helps protect downstream property and aquatic resources from flooding
� or e_x�essive andlor erosive flows? Note which o_f the followrng conditions apply.
�� Wetland has surface runoff thai drains to a river or stream that has flooding
problems
— Other multiplier
(Answer 1'�''O if the major source of water is controlled by a resen>oir(e.g. wetland is �
� a e hat is on the dox�nstream side of a damj
! S multiplier is 2 NO multiplier is 1
i
! S TOTAL -Hydrologic FuncNons 117u1tipl}�the score from S 3 by S 4
i Add score to table on p. 1
Comments
��'etland Xating Form—western�'ashington 1^ August 2004
I_ �I
i ' . i
_ , �
Tlies� qrxestia�s apply to ireflai�tls o.f rrll ht`Gl'�7 classes: � � : �`� 4��; � �'O1°��=` i
. .._..x_' _ "._ ..1....._._,�._.. . .. . _,.1. ...�._. ...-_ ,_., _.- .�:�_� ..,... ._, ��;i2.. xy:.�, i ,�S.�iN>_..�. �. . _ �. ���
��ABiTt�.T FL��TCTIC�NS =.Tndicatois that�i�etland fiuictic�ns ta p%ovide important ha�itat , �
�
�^::
H 1. Does the «�etland ha��e thc potential to pro�-ide habitat for man�- species? ` J:=
. ,
H 1.1 Vegetation siructure (see p. 72)
Check the n�pes of vegetation classes pf•esent (as defined by Cowardin) if the class
covers more than 10% of the area of the wetland or '/acre.
—�Aquatic bed
�//Emergent piants
�Scrub/shrub (areas where shrubs have >30% cover)
Forested(areas where trees have >30% cover)
Forested areas have 3 out of 5 strata(canopy, sub-canopy, shrubs,herbaceous,
moss/ground-cover)
Add the number of i�egetation types that qual�. Ifyou hm�e:
4 types or 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 within the wetland. The
�t�ater regime has to cover more tha�i 10%of the wetland or ',e acre to count. (see text
for descriptions of hydroperiods)
Permanently flooded or inur�dated 4 or more types present points�
�Seasonally flooded or inundated 3 t}�pes present points_2
/Occasionally flooded or inundated 2 types present point— 1
✓ Saturated only
��Permanently flowing stream or river in, or adjacent to,the wetland
Seasonally flowing stream in, or adjacent to,the wetland �
Lake fringe wetland =2 points
Freshwater tidal wetland=2 points
H 1.3. Richness of Plant Spec.ies (see p. 75)
Count the number of plant species in the wetland that cover at least 10 ft2. {different
patches of the same species can be combined to meet the size threshold)
You do not hm%e to name the species.
Do not include Eurasian Milfoil, reed canarygrass,purple loosestrife, Canadian
Thistle
If you counted: > 19 species points —
List species below if you want to: 5 - 19 species points�
< 5 species points=0
�
Wetland Rating Form—westem Washington 13 August 2004
H 1.4. Interspersion of habitats {see p. ?6) ,
Decide from the diagams below whether interspersion between types of vegetation '
(described in H 1.1), or vegetation types and unvegetated areas(can include open
w�ater or mudflats) is high,medium, low, or none.
_ �
�
None =0 points Lo��� = 1 point I��loderate =2 points
Y
.�r���
� - , � i}��I.ris' � r '
C � � � � - Y�
.��- � �
� ���=
_ . f� 6 .�,��
'� ; s
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 ofpoints you put into the next column. i
Large, downed, woody debris within the wetland (>4in. diameter and 6 ft long).
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 33 ft(lm) over a stream for at least 33 ft(lOm)
Stable steep banks of fine material that inight be used by beaver or muskrat for
denning (>30degree slope) OR signs of recent beaver activity are present
At least 1/<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 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 _
Wetland Rating Form—westem Waslungton 14 August 2004
H 2. Does the wetland ha�:e the opportunity to pro��de habitat for many species?
H �.l Buffers (see p. 80)
Choose the description that best represents cond:tion of buffer oftivetland. The highest
scoring criterion that applies to the wetland is to be used in the rating. See text for
deftnition of"undisturbed. "
— 100 m (330ft) of relatively undisturbed vegetated areas, rock��areas, or open water
>95% of circumference. No de�-eloped areas w•ithin 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% circuinference. Points=4
— 50 m{170ft) of relatively undisturbed vegetated areas, rocky areas,or open water
>9�% circumference. Points=4
— 100 m (330ft) of relativeI�r undisturbed vegetated areas,rocky areas, or open vti�ater
>25% circumference, . Points =3
— 50 m{170ft) of relativel}�undisturbed vegetated areas, rocky areas,or open water
for> 50% circumference. Points=3
If buffer does not mcet any of the criteria above
— No paved areas (except paved trails} or buildings within 2� m(80ft) of wetland>
95% circumference. Light to moderate grazing, or lawns are OK. Points =2
— No paved areas or buildings within SOm of wetland for>50%circumference.
Light to moderate grazing, or lawns are OK. Points= 2
— Heavy grazing in buffer. Points = 1
— Vegetated buffers are<2m wide (6.6ft) for more than 95% of the circumference
' (e.g. tilled fields,paving; basalt bedrock extend to edge of wetland Points= 0. O
— 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 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 2�0 acres in size? (dams in riparian
corridors, heavily used gravel roads,paved roads, are considered breaks in the
corridor).
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 10 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
I within 3 mi of a large field or pasture (>40 acres) OR �
withu�► 1 mi of a iake greater than 20 acres?
YES = 1 oint NO=0 oints
Wetland Rating Form—westem Washington 15 August 2004
i
,_� . i,
,. f
I �
H 2.3 Near or adjacent to other prioritv habitats listed bv ���F�T�' (see p. 82)
V4'hich of the follo��ring priority habitats are within 330ft (100m)of the wetland?
("see text fos•a more detailed descripZion of these priority habitats)
Riparian: The area adjacent to aquatic systems w�ith flowing water that contains
elemeiits 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.
OId-gro��th forests: (Old-grow�th west of Cascade crest) Stands of at least 2 tree
species, forniuzg a inniti-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: 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,
decadenee, numbers of snags, and quantity of large dov��ned material is generally
less than that found in old-grow�th; 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 Uasait,andesite, and�`or sedimentary rock, including riprap I
slides and mine tailings. I�1ay be associated with cliffs. I
Caves: A naturally occurring cavity, recess, void, or system of interconnected '
passages
Oregon white Oak: Woodlands 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 adjaceut to the
open space and uses it for breeding ancUor regular feeding; and/or the open space
funetions 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(10 acres)and is surrounded by urban development.
Estuary/Estuary-tike: Deepwater tidal habitats and adjacent tidal wetlands, usuall�
semi-enclosed by land but with open,partly obstructed or sporadic access to the
open ocean, and in which 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 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 priority habitats=3 points
If wetland has i priority habitat= 1 point No habitats=0 points
Vdetland Rating Form—westem Washington 16 August 2004
� H 2.4 Wetland Landscape (choose the one description of the landscape around the
wetland that best_�ts) (see p. 84)
There are at least 3 other wetlands within %mile, and the connections between them
are relatively undisturbed(light grazing betu�een wetlands OK, as is lake shore with
some boating, but connections �hould NOT be bisected by paved roads, fill, fields,
or other development. points =5
The wetiand 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,BUT the connections between them
are disturbed points= 3
The wetland is Lal:e-fringe on a lake v►�ith disturbance and there are 3 other lake-
fringe wetland within %mile points= 3
There is at least 1 «�etland���ithin `i� mile. points=2
There are no wetlands within %2 mile. points=0 �
�
H 2. TOTAL Score - opportunity for pro��iding habitat �
� .�dd the scores in the column abo��e
Total Score for Habitat Functions —add the points for H l, H 2 and record the result on
p. 1
Wetland Rating Form-westen�\'�'a;hington 17 .4ugust 2G04
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Please determine if the wetland fneets the att�•ibutes described below and circle the
appropriate answers and Category.
`'4'.etland T��pe _ - �, Category-
Clteck:�j�'rrra,}yci-iteria tlaat n�plv to zhe lvellri���f.� Circle�the�rpproprirzte�Categon�
�i=he�i tF�e�ui���•o t�iate��c1•iterin�ar-e nret. � � � � �� � � � � �
SC LO Estuarine a�etlands (see p. 86) -
,
Does the��etland meet the fo1loNTing criteria for Estuarine wetlands?
— The dominant water regime is tidal, -
� — Vegetated, and �:
— With a salinity greater than 0.5 ppt. -
YES = Go to SC 1.1 NO
SC 1.1 Is the v�-etland within a National V��ildlife Refuge,National Park, �
National Estuary Reserve,I�;atural Area Preserve, State Park or Educational, Cat. I
Environmental,or Scientific Reserve designated under WAC 332-30-151?
YES = Catetory 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 = Category I NO = Cateeory 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 wetland, then the wetland should be given a dual Dual
rating (I/II). The area of Spartina would be rated a Category-II while the rating
relatively 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 3/< af the land«�ard 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, ar contiguous freshwater wetlands.
. , -
, .::. ?�..5....`x..;-.i._.«. `+.�`,Avi+'3. F::i�:. ....,4.;.�a ,. .� .„'t...o-...:"`_.�,:.,..�..s�::...,�;1� ..�T. '4'.5;:.. .E� .-.:�._a'�4��c`KV?�a-.3P�^_....�:'�� ,��r_aS�e� y�w"�,.µ
��etland Rating Form— westem �'ashingto❑ 1S Auguct 2004
�
APPENDIX G
Engineering Calculations
" ' �.
Project ��t7i�12 �!b�F� Project No. _��j ��.�.[�i � Page of
Subject S�'�< �G:'!-�� Phone ❑ Calculations ''■
❑ Fax _ _
With/To Fax# I� — _
I_; Memorandum
Address #Faxed Pages � .
) ❑ Meeting Minutes �
Date �� r�/�.JGs By �'! 1 (' ❑Telephone Memo
C�vi/Engineers
Structural Engineers
�Cl�i ���'t�i �Cup -`��iZi,�L�
Landscape Architects
�1��C� �E �(Z� 'l��:%�Cj�+.iC� 1Ji.:.wtit��"�i�`�
�ED�ruEr•y� �N�S ���u.C--r �i i-�r t�R��'►�,��Tt(� Community P/anners
G� �E �i i� � i I "vJ�;�D �ll>_ �ti'l A��
�� �� N/"7V�G � � �'li� I r�)!J�.� Vl�+�� Land Surveyors
(/l.� G�'"i �JG��� � � LL� ��� ��Z;R-'>I/�'.t Neighbors
f� �i i r}t 1� D'r�► D��A� i��ne'DS F)��.. �4� �
�f LL ��i tr2 !a `�` !l.-l.-11� Ay i 1-1� 1►�� tw A�Tc'�Z
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�� '�t�;�t3 [�(L �'e4i.-�i.�(.,J�i r t�iS:
Cu� - � g`r CFS
❑TACOMA
; 1.'z x �,(�� � --� �] Z 2215 N.30th St.
:,� : ; �= " / Q,(�CC�`�(p ' ��T`Y� �f Suite 300
Tacoma,WA
� 98403-3305
1����AE 2 ��l I n�l Ej ' ;D��tH
253.383.2422
I7RL''`f�f� �� ` +ca Y�G.I�►t �Tc�Q►A�a.r_— 253.383.2572 FAX
_ -:- _ , ��I�L.:i n1C�'1 ��f�Witi'1� = ��'+��� > = �� `f ��F/ � ❑SEATTLE
i - _ '_--_-
1200 6th Avenue
' ` � _ � ' ' Suite 1620
_ . ,-----— -- . _ __
, : , Seattle,WA
� ; : ,
? . __ �._ ' ; _ - -- -- __: _ -. ', - ..' ' _ ...__ , _ _ _ -- . 101-31
, ; , 98 23
' 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
`--1 � �
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1
;
APPENDIX H
FEMA Flood Insurance Map
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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 log 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.
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 Structurai Controls
Silt Fence
Has Silt Is Fence Is There Evidence of
Date Location Reached 1/3 properly Washout or
of Fence Secured? Overto in ?
Hei ht? pp 9"
�
Maintenance required for silt fence and straw bales:
To be performed by: On or before:
Cedar River Corp�rate 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
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:
� —