20-101386-Stormwater Pollution Prevention Plan-04-22-2021-V2
Construction Stormwater General Permit
Stormwater Pollution Prevention Plan
(SWPPP)
for
Proposed Woodbridge Building A
337XX Weyehausder Way S
Federal Way, Washington 98003
Prepared for:
Federal Way Campus, LLC
Permittee / Owner Developer Operator / Contractor
Federal Way Campus, LLC
11100 Santa Monica Blvd,
Suite 850
Los Angeles, CA 90025
(310) 261-4382
Federal Way Campus, LLC
11100 Santa Monica Blvd,
Suite 850
Los Angeles, CA 90025
(310) 261-4382
Federal Way Campus, LLC
11100 Santa Monica Blvd,
Suite 850
Los Angeles, CA 90025
(310) 261-4382
Certified Erosion and Sediment Control Lead (CESCL)
Name Organization Contact Phone Number
TBD TBD TBD
SWPPP Prepared By
Name Organization Contact Phone Number
Laura Bartenhagen, P.E. ESM Consulting Engineers (253) 838-6113
SWPPP Preparation Date
4/16/2021
Project Construction Dates
Start Date End Date
January 2021 December 2022
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Table of Contents
1 Project Information .............................................................................................................. 4
1.1 Existing Conditions ...................................................................................................... 4
1.2 Proposed Construction Activities .................................................................................. 5
2 Construction Stormwater Best Management Practices (BMPs) ........................................... 6
2.1 The 13 Elements .......................................................................................................... 6
2.1.1 Element 1: Preserve Vegetation / Mark Clearing Limits ........................................ 6
2.1.2 Element 2: Establish Construction Access ............................................................ 7
2.1.3 Element 3: Control Flow Rates ............................................................................. 9
2.1.4 Element 4: Install Sediment Controls ...................................................................10
2.1.5 Element 5: Stabilize Soils ....................................................................................12
2.1.6 Element 6: Protect Slopes....................................................................................14
2.1.7 Element 7: Protect Drain Inlets ............................................................................16
2.1.8 Element 8: Stabilize Channels and Outlets ..........................................................17
2.1.9 Element 9: Control Pollutants ...............................................................................18
2.1.10 Element 10: Control Dewatering ..........................................................................22
2.1.11 Element 11: Maintain BMPs .................................................................................23
2.1.12 Element 12: Manage the Project ..........................................................................24
2.1.13 Element 13: Protect Low Impact Development (LID) BMPs .................................26
3 Pollution Prevention Team .................................................................................................27
4 Monitoring and Sampling Requirements ............................................................................28
4.1 Site Inspection ............................................................................................................28
5 Reporting and Record Keeping ..........................................................................................28
5.1 Record Keeping ..........................................................................................................28
5.1.1 Site Log Book ......................................................................................................28
5.1.2 Records Retention ...............................................................................................28
5.1.3 Updating the SWPPP ...........................................................................................29
5.2 Reporting ....................................................................................................................29
5.2.1 Discharge Monitoring Reports ..............................................................................29
5.2.2 Notification of Noncompliance ..............................................................................29
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List of Tables
Table 1 – Summary of Site Pollutant Constituents ..................................................................... 4
Table 2 – Pollutants ..................................................................................................................18
Table 3 – pH-Modifying Sources ...............................................................................................20
Table 4 – Dewatering BMPs ......................................................................................................22
Table 5 – Management .............................................................................................................24
Table 6 – BMP Implementation Schedule .................................................................................25
Table 7 – Team Information ......................................................................................................27
List of Appendices
Appendix/Glossary
A. Site Map
B. BMP Detail
C. Correspondence
D. Site Inspection Form
E. Construction Stormwater General Permit (CSWGP)
F. 303(d) List Waterbodies / TMDL Waterbodies Information
G. Contaminated Site Information
H. Engineering Calculations
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List of Acronyms and Abbreviations
Acronym / Abbreviation Explanation
303(d) Section of the Clean Water Act pertaining to Impaired Waterbodies
BFO Bellingham Field Office of the Department of Ecology
BMP(s) Best Management Practice(s)
CESCL Certified Erosion and Sediment Control Lead
CO2 Carbon Dioxide
CRO Central Regional Office of the Department of Ecology
CSWGP Construction Stormwater General Permit
CWA Clean Water Act
DMR Discharge Monitoring Report
DO Dissolved Oxygen
Ecology Washington State Department of Ecology
EPA United States Environmental Protection Agency
ERO Eastern Regional Office of the Department of Ecology
ERTS Environmental Report Tracking System
ESC Erosion and Sediment Control
GULD General Use Level Designation
NPDES National Pollutant Discharge Elimination System
NTU Nephelometric Turbidity Units
NWRO Northwest Regional Office of the Department of Ecology
pH Power of Hydrogen
RCW Revised Code of Washington
SPCC Spill Prevention, Control, and Countermeasure
su Standard Units
SWMMEW Stormwater Management Manual for Eastern Washington
SWMMWW Stormwater Management Manual for Western Washington
SWPPP Stormwater Pollution Prevention Plan
TESC Temporary Erosion and Sediment Control
SWRO Southwest Regional Office of the Department of Ecology
TMDL Total Maximum Daily Load
VFO Vancouver Field Office of the Department of Ecology
WAC Washington Administrative Code
WSDOT Washington Department of Transportation
WWHM Western Washington Hydrology Model
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1 Project Information
Project/Site Name: Woodbridge Building A
Street/Location: 337XX Weyehausder Way S
City: Federal Way State: WA Zip code: 98003
Subdivision: N/A
Receiving waterbody: East Branch Hylebos Creek
1.1 Existing Conditions
Total acreage (including support activities such as off-site equipment staging yards, material
storage areas, borrow areas).
Total site acreage: ±15.46 ac
Disturbed acreage: ±15.46 ac
Existing structures: The site is mostly undeveloped, with gravel trails and
maintenance roads throughout, along with storage areas for
landscape materials (topsoil, gravel, etc.)
Landscape
Topography:
There is approximately 40 feet of fall across the property from
the northwest corner to the southeast corner of the site (to
Stream EA).
Drainage patterns: The proposed onsite stormwater conveyance system will collect
and convey runoff from the developed Building A project site
south through the existing 24-inch diameter CMP culvert
beneath highway 18, which is a natural discharge location for
the project site.
Existing Vegetation: The existing site is generally forested with a mix of large
evergreen and deciduous trees.
Critical Areas: There are eight small wetlands and a stream located
onsite.
List of known impairments for 303(d) listed or Total Maximum Daily Load (TMDL) for the
receiving waterbody: East Branch Hylebos Creek is not a 303(d) listed water body.
Table 1 includes a list of suspected and/or known contaminants associated with the construction
activity.
Table 1 – Summary of Site Pollutant Constituents
Constituent
(Pollutant) Location Depth Max. Concentration
Detected (mg/kg)
Hydraulic Fluid
(potential)
Anywhere on site resulting from a Spill
or leak from equipment maintenance
Surface
Soil
N/A
Diesel (potential) Anywhere on site resulting from a Spill
or leak from equipment maintenance
Surface
Soil
N/A
Motor Oil
(potential)
Anywhere on site resulting from a Spill
or leak from equipment maintenance
Surface
Soil
N/A
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1.2 Proposed Construction Activities
Description of site development:
The proposed development consists of a single-story warehouse building with parking &
landscaped areas around the building structure on a 15.46-acre parcel.
Additionally, there will be pedestrian connectivity improvements along the west side of
Weyerhaeuser Way S (landscape planter and sidewalk). The 50-foot wide managed forest
buffer that extends along the property frontage on Weyerhaeuser Way S will be preserved with
this development, with the exception of one driveway and one sidewalk penetration for access.
The remainder of the frontage improvements will be deferred until Building B’s development.
The remaining area south of the proposed Building A will be developed at a later date, as
Building B.
Description of construction activities:
Construction activities include site clearing, site preparation, erosion and sedimentation control
installation, building construction, stormwater and other utility appurtenance installation, asphalt
paving and landscaping.
Description of site drainage including flow from and onto adjacent properties. Must be
consistent with Site Map in Appendix A:
During the inspection it was found that the project site has no apparent upstream offsite areas
draining to the property. The flows from the project site drain to an offsite stream (East Branch
Hylebos Creek). There did not appear to be any flooding issues over any of the roadways
adjacent to the project site.
Description of final stabilization (example: extent of revegetation, paving, landscaping):
The proposed development consists of a single-story warehouse building with parking &
landscaped areas around the building structure on a 15.46-acre parcel.
Contaminated Site Information:
Proposed activities regarding contaminated soils or groundwater (example: on-site
treatment system, authorized sanitary sewer discharge):
Contaminated soils are not anticipated to be present on site.
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2 Construction Stormwater Best Management Practices (BMPs)
The SWPPP is a living document reflecting current conditions and changes throughout the life
of the project. These changes may be informal (i.e., hand-written notes and deletions). Update
the SWPPP when the CESCL has noted a deficiency in BMPs or deviation from original design.
2.1 The 13 Elements
2.1.1 Element 1: Preserve Vegetation / Mark Clearing Limits
To protect adjacent properties and reduce the area of soil exposed to construction, the limits of
construction will be clearly marked before land-disturbing activities begin. All wetland and
stream buffers shall be clearly delineated, both in the field and on the plans. A silt fence will be
installed around the perimeter of the project site to mark the limits of construction as well as
protect surrounding properties from any possible sediment laden runoff. Grading will occur
around the perimeter of the disturbed area to insure there is no runoff of any ponded
stormwater.
List and describe BMPs:
BMP C233: Silt Fence
Installation Schedules: Beginning of Project
Inspection and Maintenance plan:
Silt Fence Maintenance
• Repair any damage immediately.
• Intercept and convey all evident concentrated flows uphill of the silt fence to a sediment
pond.
• Check the uphill side of the fence for signs of the fence clogging and acting as a barrier
to flow and then causing channelization of flows parallel to the fence. If this occurs,
replace the fence or remove the trapped sediment.
• Remove sediment deposits when the deposit reaches approximately one-third the height
of the silt fence, or install a second silt fence.
• Replace filter fabric that has deteriorated due to ultraviolet breakdown.
Responsible Staff: Contractor/CESCL
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2.1.2 Element 2: Establish Construction Access
Access points shall be stabilized to minimize the tracking of sediment onto public roads, street
sweeping, and street cleaning shall be employed to prevent sediment from entering state
waters. Two quarry spall entrances consistent with BMP C105 will be installed so there is
access to the site from Sidney Road and Hovde Road. Street sweeping and street cleaning may
be necessary, in which case the roads shall be swept daily should sediment collect on them. On
site designated areas will be used for construction equipment and storage in order to keep
equipment on paved areas as much as possible.
List and describe BMPs:
BMP C105: Stabilized Construction Entrance
BMP C107: Construction Road/Parking Area Stabilization
Installation Schedules: Beginning of Project
Inspection and Maintenance plan:
Stabilized Construction Entrance Maintenance
• Quarry spalls shall be added if the pad is no longer in accordance with the specifications.
• If the entrance is not preventing sediment from being tracked onto pavement, then
alternative measures to keep the streets free of sediment shall be used. This may include
replacement/cleaning of the existing quarry spalls, street sweeping, an increase in the
dimensions of the entrance, or the installation of a wheel wash.
• Any sediment that is tracked onto pavement shall be removed by shoveling or street
sweeping. The sediment collected by sweeping shall be removed or stabilized on site. The
pavement shall not be cleaned by washing down the street, except when high efficiency
sweeping is ineffective and there is a threat to public safety. If it is necessary to wash the
streets, the construction of a small sump to contain the wash water shall be considered. The
sediment would then be washed into the sump where it can be controlled.
• Perform street sweeping by hand or with a high efficiency sweeper. Do not use a non-high
efficiency mechanical sweeper because this creates dust and throws soils into storm
systems or conveyance ditches.
• Any quarry spalls that are loosened from the pad, which end up on the roadway shall be
removed immediately.
• If vehicles are entering or exiting the site at points other than the construction entrance(s),
fencing (see BMP C103) shall be installed to control traffic.
• Upon project completion and site stabilization, all construction accesses intended as
permanent access for maintenance shall be permanently stabilized.
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Construction Road/Parking Area Stabilization Maintenance:
• Inspect stabilized areas regularly, especially after large storm events.
• Crushed rock, gravel base, etc. shall be added as required to maintain a stable driving
surface and to stabilize any areas that have eroded.
• Following construction, these areas shall be restored to pre-construction condition or
better to prevent future erosion.
• Perform street cleaning at the end of each day or more often if necessary.
Responsible Staff: Contractor/CESCL
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2.1.3 Element 3: Control Flow Rates
In order to protect the properties and waterways downstream of the project site, stormwater
from the site will be controlled by construction of a temporary sediment pond as one of the first
items of construction along with installation of silt fence around the downstream property
boundary areas. Once the pond is constructed, stormwater during construction will be captured
through v-ditches with rock check dams in order to control the flow of stormwater runoff before
reaching the temporary sediment pond. The temporary pond is located at the low point on the
site with adequate surface area for sediment settlement per the DOE requirements from BMP
C241. The sediment pond will infiltrate onsite. The facility must be functioning properly before
construction of site improvements.
Will you construct stormwater retention and/or detention facilities?
Yes No
Will you use permanent infiltration ponds or other low impact development (example: rain
gardens, bio-retention, porous pavement) to control flow during construction?
Yes No
List and describe BMPs:
BMP C207: Check Dams
BMP C241: Temporary Sediment Pond
Installation Schedules: Beginning of Project
Inspection and Maintenance plan:
Sediment Pond Maintenance
• Sediment shall be removed from the pond when it reaches 1-foot in depth.
• Any damage to the pond embankments or slopes shall be repaired.
Check Dam Maintenance
• Check dams shall be monitored for performance and sediment accumulation during and
after each runoff producing rainfall.
• Sediment shall be removed when it reaches one half the sump depth.
• Anticipate submergence and deposition above the check dam and erosion from high
flows around the edges of the dam.
• If significant erosion occurs between dams, install a protective riprap liner in that portion
of the channel.
Responsible Staff: Contractor/CESCL
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2.1.4 Element 4: Install Sediment Controls
Constructing the silt fence and the sediment control pond are the first steps to create the
necessary gradients for flow to the pond and to prevent off site discharge of sediment. Rock
check dams and v-ditches will be used to convey stormwater runoff into the sediment pond and
to collect out sediment as well. The sediment pond is expected to be adequate for sediment
control prior to discharge to the sewer. The surface area requirements for the TESC pond are
met with the designed TESC plan and it is not expected that further treatment or other sediment
controlling measures are necessary.
However, if the proposed sediment controls are ineffective as determined by the CESCL, they
will promptly initiate the implementation of one or more of the alternative BMPs listed in
Appendix B.
List and describe BMPs:
BMP C207: Check Dams
BMP C233: Silt Fence
BMP C241: Temporary Sediment Pond
Installation Schedules: Beginning of Project
Inspection and Maintenance plan:
Silt Fence Maintenance
• Repair any damage immediately.
• Intercept and convey all evident concentrated flows uphill of the silt fence to a sediment
pond.
• Check the uphill side of the fence for signs of the fence clogging and acting as a barrier
to flow and then causing channelization of flows parallel to the fence. If this occurs,
replace the fence or remove the trapped sediment.
• Remove sediment deposits when the deposit reaches approximately one-third the height
of the silt fence, or install a second silt fence.
• Replace filter fabric that has deteriorated due to ultraviolet breakdown.
Sediment Pond/Trap Maintenance
• Sediment shall be removed from the trap/pond when it reaches 1-foot in depth.
• Any damage to the pond embankments or slopes shall be repaired.
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Check Dam Maintenance
• Check dams shall be monitored for performance and sediment accumulation during and
after each runoff producing rainfall.
• Sediment shall be removed when it reaches one half the sump depth.
• Anticipate submergence and deposition above the check dam and erosion from high
flows around the edges of the dam.
• If significant erosion occurs between dams, install a protective riprap liner in that portion
of the channel.
Responsible Staff: Contractor/CESCL
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2.1.5 Element 5: Stabilize Soils
Exposed and unworked soils shall be stabilized with the application of effective BMPs to prevent
erosion throughout the life of the project. In general, cut and fill slopes will be stabilized as soon
as possible and soil stockpiles will be stabilized through hydroseeding. All stockpiled soils shall
be stabilized from erosion, protected with sediment trapping measures, and where possible, be
located away from storm drain inlets, waterways, and drainage channels. To minimize soil
compaction, a construction entrance will be used as well as keeping heavy equipment and
machinery off unpaved areas as much as possible. There will be designated areas used for
construction staging to keep machinery off unpaved areas as much as possible.
West of the Cascade Mountains Crest
Season Dates Number of Days Soils Can
be Left Exposed
During the Dry Season May 1 – September 30 7 days
During the Wet Season October 1 – April 30 2 days
Soils must be stabilized at the end of the shift before a holiday or weekend if needed based on
the weather forecast.
Anticipated project dates: Start date: January 2021 End date: December 2022
Will you construct during the wet season?
Yes No
List and describe BMPs:
BMP C120: Temporary and Permanent Seeding
BMP C121: Mulching
BMP C140: Dust Control
Installation Schedules: After grading where the number of days soils can be left exposed is 7
days during the dry season and 2 days during the wet season.
Inspection and Maintenance plan:
Temporary and Permanent Seeding Maintenance:
• Reseed any seeded areas that fail to establish at least 80 percent cover (100 percent
cover for areas that receive sheet or concentrated flows). If reseeding is ineffective, use
an alternate method such as sodding, mulching, or nets/blankets. If winter weather
prevents adequate grass growth, this time limit may be relaxed at the discretion of the
local authority when sensitive areas would otherwise be protected.
• Reseed and protect by mulch any areas that experience erosion after achieving
adequate cover. Reseed and protect by mulch any eroded area.
• Supply seeded areas with adequate moisture, but do not water to the extent that it
causes runoff.
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Dust Control Maintenance
• Respray area as necessary to keep dust to a minimum.
Mulching Maintenance
• The thickness of the cover must be maintained.
• Any areas that experience erosion shall be remulched and/or protected with a net or
blanket. If the erosion problem is drainage related, then the problem shall be fixed and
the eroded area remulched.
Responsible Staff: Contractor/CESCL
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2.1.6 Element 6: Protect Slopes
All cut and fill slopes will be designed, constructed, and protected in a manner that minimizes
erosion. It is required that any temporary pipe slope drains must handle the peak 10-minute flow
rate from a Type 1A, 10-year, 24-hour frequency storm for the developed condition.
Alternatively, the 10-year, 1-hour flow rate predicted by an approved continuous runoff model,
increased by a factor of 1.6, may be used. The hydrologic analysis must use the existing land
cover condition for predicting flow rates from tributary areas outside the project limits. For
tributary areas on the project site, the analysis must use the temporary or permanent project
land cover condition, whichever will produce the highest flow rates. For modeling the condition
with the Western Washington Hydrology Model (WWHM) to predict flows, bare soil areas have
been modeled as “landscaped area”. Scouring will be reduced by using v-ditches with rock
check dams to convey stormwater to the sediment pond on site. However, if the proposed
BMPs to protect slopes are ineffective as determined by the CESCL, they will promptly initiate
the implementation of one or more of the alternative BMPs listed in Appendix B. The 10-year
flow from WWHM is 1.72 cfs; therefore, temporary pipe must accommodate (1.72 cfs * 1.6) 2.75
cfs.
Will steep slopes be present at the site during construction?
Yes No
List and describe BMPs:
BMP C120: Temporary and Permanent Seeding
BMP C207: Check Dams
Installation Schedules: Beginning of Project and/or after grading where the number of days
soils can be left exposed is 7 days during the dry season and 2 days during the wet season.
Inspection and Maintenance plan:
Temporary and Permanent Seeding Maintenance
• Reseed any seeded areas that fail to establish at least 80 percent cover (100 percent
cover for areas that receive sheet or concentrated flows). If reseeding is ineffective, use
an alternate method such as sodding, mulching, or nets/blankets. If winter weather
prevents adequate grass growth, this time limit may be relaxed at the discretion of the
local authority when sensitive areas would otherwise be protected.
• Reseed and protect by mulch any areas that experience erosion after achieving
adequate cover. Reseed and protect by mulch any eroded area.
• Supply seeded areas with adequate moisture, but do not water to the extent that it
causes runoff.
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Check Dam Maintenance
• Check dams shall be monitored for performance and sediment accumulation during and
after each runoff producing rainfall.
• Sediment shall be removed when it reaches one half the sump depth.
• Anticipate submergence and deposition above the check dam and erosion from high
flows around the edges of the dam.
• If significant erosion occurs between dams, install a protective riprap liner in that portion
of the channel.
Responsible Staff: Contractor/CESCL
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2.1.7 Element 7: Protect Drain Inlets
All storm drain inlets and culverts made operable during construction shall be protected to
prevent unfiltered or untreated water from entering the drainage conveyance system. However,
the first priority is to keep all access roads clean of sediment. Storm Drain Inlet Protection (BMP
C220) will be implemented for all drainage inlets and culverts that could potentially be impacted
by sediment-laden runoff on and near the project site. If this is deemed ineffective by the
CESCL, additional BMPs may be necessary, as listed in Appendix B. Inlet protection is the last
component of a treatment train and protection of drain inlets include additional sediment and
erosion control measures. Inlet protection devices will be cleaned (or removed and replaced),
when sediment has filled the device by one third (1/3) or as specified by the manufacturer.
List and describe BMPs:
BMP C220: Storm Drain Inlet Protection
Installation Schedules: Beginning of Project
Inspection and Maintenance plan:
Storm Drain Inlet Protection Maintenance
• Inspect catch basin filters frequently, especially after storm events. Clean and replace
clogged inserts. For systems with clogged stone filters: pull away the stones from the
inlet and clean or replace. An alternative approach would be to use the clogged stone as
fill and put fresh stone around the inlet.
• Do not wash sediment into storm drains while cleaning. Spread all excavated material
evenly over the surrounding land area or stockpile and stabilize as appropriate.
• Inlets to be inspected weekly and a minimum of daily during storm events.
Responsible Staff: Contractor/CESCL
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2.1.8 Element 8: Stabilize Channels and Outlets
For construction stormwater conveyance, v-ditches with rock check dams will be installed to
stabilize channels. Stabilization, including armoring material, adequate to prevent erosion of
outlets, adjacent streambanks, slopes, and downstream reaches shall be provided at the outlets
of all conveyance systems. The project site is located west of the Cascade Mountain Crest. As
such, all temporary on-site conveyance channels shall be designed, constructed, and stabilized
to prevent erosion from the expected peak 10 minute velocity of flow from a Type 1A, 10-year,
24-hour frequency storm for the developed condition. Alternatively, the 10-year, 1-hour flow rate
predicted by an approved continuous runoff model, increased by a factor of 1.6, may be used.
The hydrologic analysis must use the existing land cover condition for predicting flow rates from
tributary areas outside the project limits. For tributary areas on the project site, the analysis
must use the temporary or permanent project land cover condition, whichever will produce the
highest flow rates. If using the WWHM to predict flows, bare soil areas should be modeled as
“landscaped area”.
Provide stabilization, including armoring material, adequate to prevent erosion of outlets,
adjacent stream banks, slopes, and downstream reaches, will be installed at the outlets of all
conveyance systems.
List and describe BMPs:
BMP C207: Check Dams
Installation Schedules: Beginning of Project and/or after grading where the number of days
soils can be left exposed is 7 days during the dry season and 2 days during the wet season.
Inspection and Maintenance plan:
Check Dam Maintenance
• Check dams shall be monitored for performance and sediment accumulation during and
after each runoff producing rainfall. Sediment shall be removed when it reaches one half
the sump depth.
• Anticipate submergence and deposition above the check dam and erosion from high
flows around the edges of the dam.
• If significant erosion occurs between dams, install a protective riprap liner in that portion
of the channel.
Responsible Staff: Contractor/CESCL
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2.1.9 Element 9: Control Pollutants
The following pollutants are anticipated to be present on-site:
Table 2 – Pollutants
Pollutant (List pollutants and source, if applicable)
Hydraulic fluid - May be present on site with construction equipment.
Diesel - May be present on site with construction equipment.
Motor Oil - May be present on site with construction equipment.
All pollutants, including waste materials and demolition debris, that occur onsite shall be
handled and disposed of in a manner that does not cause contamination of stormwater. Good
housekeeping and preventative measures will be taken to ensure that the site will be kept clean,
well-organized, and free of debris. Chemicals, liquid products, petroleum products, and other
polluting materials will be kept covered, stored appropriately, and locked when not in use to
prevent vandalism or misuse of these materials that may pollute state waters.
If required, BMPs to be implemented to control specific sources of pollutants are discussed
below. Vehicles, construction equipment, and/or petroleum product storage/dispensing:
• All vehicles, equipment, and petroleum product storage/dispensing areas will be
inspected regularly to detect any leaks or spills, and to identify maintenance
needs to prevent leaks or spills.
• On-site fueling tanks and petroleum product storage containers shall include
secondary containment.
• Spill prevention measures, such as drip pans, will be used when conducting
maintenance and repair of vehicles or equipment.
• In order to perform emergency repairs on site, temporary plastic will be placed
beneath and, if raining, over the vehicle.
• Contaminated surfaces shall be cleaned immediately following any discharge or
spill incident.
• Storm drain inlets vulnerable to stormwater discharge carrying dust, soil, or
debris will be protected using Storm Drain Inlet Protection (BMP C220 as
described above for Element 7).
• Process water and slurry resulting from sawcutting and surfacing operations
will be prevented from entering the waters of the State by implementing
Sawcutting and Surfacing Pollution Prevention measures (BMP C152).
Concrete and grout:
• Process water and slurry resulting from concrete work will be prevented from
entering the waters of the State by implementing Concrete Handling
measures (BMP C151).
List and describe BMPs:
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BMP C151: Concrete Handling
BMP C152: Sawcutting and Surfacing Pollution Prevention
Installation Schedules: As concrete/sawcutting and surfacing occurs
Inspection and Maintenance plan:
Concrete Handling Maintenance
• Check containers for holes in the liner daily during concrete pours and repair the same
day.
Sawcutting and Surfacing Pollution Prevention
• Continually monitor operations to determine whether slurry, cuttings, or process water
could enter waters of the state. If inspections show that a violation of water quality
standards could occur, stop operations and immediately implement preventive measures
such as berms, barriers, secondary containment, and vacuum trucks.
Responsible Staff: Contractor/CESCL
Will maintenance, fueling, and/or repair of heavy equipment and vehicles occur on-site?
Yes No
In order to prevent spills and minimize risk, the following list should be applied
• Temporary storage area should be located away from vehicular traffic, near the
construction entrance(s), and away from waterways or storm drains.
• Material Safety Data Sheets (MSDS) should be supplied for all materials stored.
Chemicals should be kept in their original labeled containers.
• Hazardous material storage on-site should be minimized.
• Hazardous materials should be handled as infrequently as possible.
• During the wet weather season (Oct 1 – April 30), consider storing materials in a
covered area.
• Materials should be stored in secondary containments, such as earthen dike, horse
trough, or even a children’s wading pool for non-reactive materials such as detergents,
oil, grease, and paints. Small amounts of material may be secondarily contained in “bus
boy” trays or concrete mixing trays.
• Do not store chemicals, drums, or bagged materials directly on the ground. Place these
items on a pallet and, when possible, and within secondary containment.
• If drums must be kept uncovered, store them at a slight angle to reduce ponding of
rainwater on the lids to reduce corrosion. Domed plastic covers are inexpensive and
snap to the top of drums, preventing water from collecting.
• Liquids, petroleum products, and substances listed in 40 CFR Parts 110, 117, or 302
shall be stored in approved containers and drums and shall not be overfilled. Containers
and drums shall be stored in temporary secondary containment facilities.
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List and describe BMPs:
BMP C153: Material Delivery, Storage and Containment
Installation Schedules: As material delivery, storage, and containment occur
Inspection and Maintenance plan:
The spill kit should include, at a minimum:
• 1-Water Resistant Nylon Bag
• 3-Oil Absorbent Socks 3”x 4’
• 2-Oil Absorbent Socks 3”x 10’
• 12-Oil Absorbent Pads 17”x19”
• 1-Pair Splash Resistant Goggles
• 3-Pair Nitrile Gloves
• 10-Disposable Bags with Ties
• Instructions
Responsible Staff: Contractor/CESCL
Will wheel wash or tire bath system BMPs be used during construction?
Yes No
Will pH-modifying sources be present on-site?
Yes No
Table 3 – pH-Modifying Sources
None
Bulk cement
Cement kiln dust
Fly ash
Other cementitious materials
New concrete washing or curing waters
Waste streams generated from concrete grinding and sawing
Exposed aggregate processes
Dewatering concrete vaults
Concrete pumping and mixer washout waters
Recycled concrete
Recycled concrete stockpiles
Other (i.e., calcium lignosulfate) [please describe: ]
List and describe BMPs:
BMP C151: Concrete Handling
BMP C152: Sawcutting and Surfacing Pollution Prevention
Installation Schedules: TBD
P a g e | 21
Inspection and Maintenance plan:
Concrete Handling Maintenance
• Check containers for holes in the liner daily during concrete pours and repair the same
day.
Sawcutting and Surfacing Pollution Prevention
• Continually monitor operations to determine whether slurry, cuttings, or process water
could enter waters of the state. If inspections show that a violation of water quality
standards could occur, stop operations and immediately implement preventive measures
such as berms, barriers, secondary containment, and vacuum trucks.
Responsible Staff: Contractor/CESCL
Concrete trucks must not be washed out onto the ground, or into storm drains, open ditches,
streets, or streams. Excess concrete must not be dumped on-site, except in designated
concrete washout areas with appropriate BMPs installed.
Will uncontaminated water from water-only based shaft drilling for construction of building, road,
and bridge foundations be infiltrated provided the wastewater is managed in a way that prohibits
discharge to surface waters?
Yes No
P a g e | 22
2.1.10 Element 10: Control Dewatering
Dewatering is not anticipated to be needed for the construction site however, BMPs from
Appendix B may be implemented by the CESCL if needed.
Table 4 – Dewatering BMPs
Infiltration
Transport off-site in a vehicle (vacuum truck for legal disposal)
Ecology-approved on-site chemical treatment or other suitable treatment technologies
Sanitary or combined sewer discharge with local sewer district approval (last resort)
Use of sedimentation bag with discharge to ditch or swale (small volumes of localized
dewatering)
List and describe BMPs: BMP C251: Construction Stormwater Filtration
Installation Schedules: As dewatering is needed
Inspection and Maintenance plan:
• Screen, bag, and fiber filters must be cleaned and/or replaced when they become
clogged.
• Sediment shall be removed from the storage and/or treatment ponds as necessary.
Typically, sediment removal is required once or twice during a wet season and at the
decommissioning of the ponds.
Responsible Staff: Contractor/CESCL
P a g e | 23
2.1.11 Element 11: Maintain BMPs
All temporary and permanent Erosion and Sediment Control (ESC) BMPs shall be maintained
and repaired as needed to ensure continued performance of their intended function.
Maintenance and repair shall be conducted in accordance with each particular BMP
specification (see Volume II of the SWMMWW or Chapter 7 of the SWMMEW).
Visual monitoring of all BMPs installed at the site will be conducted at least once every calendar
week and within 24 hours of any stormwater or non-stormwater discharge from the site. If the
site becomes inactive and is temporarily stabilized, the inspection frequency may be reduced to
once every calendar month.
All temporary ESC BMPs shall be removed within 30 days after final site stabilization is
achieved or after the temporary BMPs are no longer needed.
Trapped sediment shall be stabilized on-site or removed. Disturbed soil resulting from removal
of either BMPs or vegetation shall be permanently stabilized.
Additionally, protection must be provided for all BMPs installed for the permanent control of
stormwater from sediment and compaction. BMPs that are to remain in place following
completion of construction shall be examined and restored to full operating condition. If
sediment enters these BMPs during construction, the sediment shall be removed and the facility
shall be returned to conditions specified in the construction documents.
P a g e | 24
2.1.12 Element 12: Manage the Project
The project will be managed based on the following principles:
• Projects will be phased to the maximum extent practicable and seasonal work limitations
will be taken into account.
• Inspection and monitoring:
o Inspection, maintenance and repair of all BMPs will occur as needed to ensure
performance of their intended function.
o Site inspections and monitoring will be conducted in accordance with Special
Condition S4 of the CSWGP. Sampling locations are indicated on the Site Map.
Sampling station(s) are located in accordance with applicable requirements of
the CSWGP.
• Maintain an updated SWPPP.
o The SWPPP will be updated, maintained, and implemented in accordance with
Special Conditions S3, S4, and S9 of the CSWGP.
As site work progresses the SWPPP will be modified routinely to reflect changing site
conditions. The SWPPP will be reviewed monthly to ensure the content is current.
Table 5 – Management
Design the project to fit the existing topography, soils, and drainage patterns
Emphasize erosion control rather than sediment control
Minimize the extent and duration of the area exposed
Keep runoff velocities low
Retain sediment on-site
Thoroughly monitor site and maintain all ESC measures
Schedule major earthwork during the dry season
Other (please describe)
P a g e | 25
Table 6 – BMP Implementation Schedule
Phase of Construction
Project
Stormwater BMPs Date Wet/Dry
Season
Beginning of Project BMP C233: Silt Fence January 2021 Wet
BMP C105: Stabilized
Construction Entrance
BMP C107: Construction
Road/Parking Area
Stabilization
BMP C207: Check Dams
BMP C220: Storm Drain
Inlet Protection
BMP C241: Temporary
Sediment Pond
After Grading BMP C120: Temporary and
Permanent Seeding
January 2021-
December 2022
Dry
BMP C121: Mulchin
BMP C140: Dust Control
During
Concrete/Sawcutting
and Surfacing
BMP C151: Concrete
Handling
January 2021-
December 2022
Dry
BMP C152: Sawcutting and
Surfacing Pollution
Prevention
During material delivery,
storage, and
containment occur
BMP C153: Material
Delivery, Storage and
Containment
January 2021-
December 2022
Dry
If Dewatering is needed BMP C251: Construction
Stormwater Filtration
January 2021-
December 2022
Dry
P a g e | 26
2.1.13 Element 13: Protect Low Impact Development (LID) BMPs
There are no permanent stormwater BMPs for this project.
P a g e | 27
3 Pollution Prevention Team
Table 7 – Team Information
Title Name(s) Phone Number
Certified Erosion and
Sediment Control Lead
(CESCL)
TBD TBD
Resident Engineer Laura Bartenhagen (253) 838-6113
Emergency Ecology
Contact
Kendra Henderson (360) 873-6757
Emergency Permittee/
Owner Contact
TBD (206) 233-9600
Non-Emergency Owner
Contact
TBD (206) 233-9600
Monitoring Personnel TBD TBD
Ecology Regional Office Southwest Regional Office (360) 407-6300
P a g e | 28
4 Monitoring and Sampling Requirements
Monitoring includes visual inspection, sampling for water quality parameters of concern, and
documentation of the inspection and sampling findings in a site log book. A site log book will be
maintained for all on-site construction activities and will include:
• A record of the implementation of the SWPPP and other permit requirements
• Site inspections
• Stormwater sampling data
File a blank form under Appendix D.
The site log book must be maintained on-site within reasonable access to the site and be made
available upon request to Ecology or the local jurisdiction.
4.1 Site Inspection
Site inspections will be conducted at least once every calendar week and within 24 hours
following any discharge from the site. For sites that are temporarily stabilized and inactive, the
required frequency is reduced to once per calendar month.
The discharge point(s) to the sanitary sewer are indicated on the Site Map (see Appendix A)
and in accordance with the applicable requirements of the CSWGP.
5 Reporting and Record Keeping
5.1 Record Keeping
5.1.1 Site Log Book
A site log book will be maintained for all on-site construction activities and will include:
• A record of the implementation of the SWPPP and other permit requirements
• Site inspections
• Sample logs
5.1.2 Records Retention
Records will be retained during the life of the project and for a minimum of three (3) years
following the termination of permit coverage in accordance with Special Condition S5.C of the
CSWGP.
Permit documentation to be retained on-site:
• CSWGP
• Permit Coverage Letter
• SWPPP
• Site Log Book
P a g e | 29
Permit documentation will be provided within 14 days of receipt of a written request from
Ecology. A copy of the SWPPP or access to the SWPPP will be provided to the public when
requested in writing in accordance with Special Condition S5.G.2.b of the CSWGP.
5.1.3 Updating the SWPPP
The SWPPP will be modified if:
• Found ineffective in eliminating or significantly minimizing pollutants in stormwater
discharges from the site.
• There is a change in design, construction, operation, or maintenance at the construction
site that has, or could have, a significant effect on the discharge of pollutants to waters
of the State.
The SWPPP will be modified within seven (7) days if inspection(s) or investigation(s) determine
additional or modified BMPs are necessary for compliance. An updated timeline for BMP
implementation will be prepared.
5.2 Reporting
5.2.1 Discharge Monitoring Reports
Cumulative soil disturbance is one (1) acre or larger; therefore, Discharge Monitoring
Reports (DMRs) will be submitted to Ecology monthly. If there was no discharge during a given
monitoring period the DMR will be submitted as required, reporting “No Discharge”. The DMR
due date is fifteen (15) days following the end of each calendar month.
DMRs will be reported online through Ecology’s WQWebDMR System.
5.2.2 Notification of Noncompliance
If any of the terms and conditions of the permit is not met, and the resulting noncompliance may
cause a threat to human health or the environment, the following actions will be taken:
1. Ecology will be notified within 24-hours of the failure to comply by calling the applicable
Regional office ERTS phone number (Regional office numbers listed below).
2. Immediate action will be taken to prevent the discharge/pollution or otherwise stop or
correct the noncompliance. If applicable, sampling and analysis of any noncompliance
will be repeated immediately and the results submitted to Ecology within five (5) days of
becoming aware of the violation.
3. A detailed written report describing the noncompliance will be submitted to Ecology
within five (5) days, unless requested earlier by Ecology.
Anytime turbidity sampling indicates turbidity is 250 NTUs or greater, or water transparency is 6
cm or less, the Ecology Regional office will be notified by phone within 24 hours of analysis as
required by Special Condition S5.A of the CSWGP.
• Miya Spratt at (360) 870-7853 for Kitsap County
P a g e | 30
Include the following information:
1. Your name and / Phone number
2. Permit number
3. City / County of project
4. Sample results
5. Date / Time of call
6. Date / Time of sample
7. Project name
In accordance with Special Condition S4.D.5.b of the CSWGP, the Ecology Regional office will
be notified if chemical treatment other than CO2 sparging is planned for adjustment of high pH
water.
P a g e | 31
Appendix/Glossary
A. Site Map
µ
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NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-01.dwg4/19/2021 2:04 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-01
LGB
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04/23/2021
ΦΘ,/0
6 34
SEE SHEET GR-03 FOR CONTINUATION
STRIPPING = 22,005 CY
CUT = 73,229 CY
FILL = 50,512 CY
APPROXIMATE EARTHWORK QUANTITIES
FOR PERMIT PURPOSES ONLY. QUANTITIES ARE "NEAT LINE"
YARDAGE'S WITHOUT ALLOWANCE FOR SHRINK OR SWELL. IT IS THE
CONTRACTOR'S RESPONSIBILITY TO CALCULATE ALL YARDAGE'S FOR
BID PURPOSES. 1.0' FT. OF STRIPPING WAS ASSUMED.
PERVIOUS AREA=236,966 SF
*IMPERVIOUS AREA=436,471 SF
*TOTAL ROW IMPROVEMENTS HAVE CHANGED SINCE THE
PRELIMINARY SUBMITTAL, THESE AREAS REFLECT THE
FINAL RECORDED AREAS.
ΒΝΜΡΣΘΤΒΣΗΝΜ Ρ∆ΠΤ∆ΜΒ∆
1. PRE-CONSTRUCTION MEETING.
2. POST SIGN WITH NAME AND PHONE NUMBER OF ESC SUPERVISOR
(MAY BE CONSOLIDATED WITH THE REQUIRED NOTICE OF CONSTRUCTION
SIGN).
3. FLAG OR FENCE CLEARING LIMITS.
4. INSTALL PERIMETER PROTECTION, SUCH AS FILTER FABRIC FENCE,
WHERE INDICATED.
5. GRADE AND INSTALL ROCK-LINED CONSTRUCTION ENTRANCE(S).
6. INSTALL SEDIMENT BARRIERS OVER EXISTING CATCH BASINS.
7. CLEAR TO LIMITS SHOWN ON PLANS AND INSTALL INTERCEPTOR
DITCHES.
8. CONSTRUCT SEDIMENT PONDS.
9. ROUGH GRADE PARKING AREA AND BUILDING PAD.
10. INSTALL SANITARY SEWER SYSTEM.
11. INSTALL STORM DRAINAGE SYSTEM AND STORMWATER CARTRIDGE
FILTERS.
12. INSTALL DOMESTIC WATER SYSTEM.
13. INSTALL SEDIMENT BARRIERS OVER CATCH BASINS.
14. FINE GRADE FOR CURB AND GUTTER, SIDEWALK, PAVEMENT, AND
LANDSCAPING.
15. INSTALL CURB, GUTTER, AND SIDEWALK.
16. PAVE PARKING AREA.
17. REMOVE SEDIMENT BARRIERS.
18. COMPLETE LANDSCAPING.
19. MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH CITY
OF FEDERAL WAY STANDARDS AND MANUFACTURER'S
RECOMMENDATIONS.
20. RELOCATE EROSION CONTROL MEASURES OR INSTALL NEW
MEASURES SO THAT AS SITE CONDITIONS CHANGE THE EROSION AND
SEDIMENT CONTROL IS ALWAYS IN ACCORDANCE WITH CITY OF FEDERAL
WAY STANDARDS.
21. COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN
DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON
WITH STRAW, WOOD FIBER MULCH, COMPOST, PLASTIC SHEETING OR
EQUIVALENT.
22. STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN SEVEN DAYS.
23. SEED OR SOD ANY AREAS TO REMAIN UNWORKED FOR MORE THAN 30
DAYS.
24. UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST
BE STABILIZED, HYDROSEEDED AND BMPS REMOVED IF APPROPRIATE.SEE SHEET GR-02 FOR CONTINUATION%%UNOTES
REDTOP BENTGRASS (Agrostis alba) 30%%%
PERENNIAL RYEGRASS (Lolium perenne) 20%%%
COLONIAL BENTGRASS (Agrostis tenuis) 20%%%
RED FESCUE (Festuca rubra) 15%%%
APPLICATION RATE: 30 LBS. / ACRE
%%UNAME
MIXTURE BELOW SPECIFIED AS A RATIO BY WEIGHT:
SEED ALL AREAS THAT ARE BARE GROUND AND AT LEAST 18" FROM ANY PLANTED TREE OR SHRUB.
FOR HYDROSEED, USE 7-8 LBS. OF SEED MIX PER 1,000 SQUARE FEET, APPROXIMATELY 9-10 LBS. OF 10-20-20
N-P-K FERTILIZER PER 1,000 SQUARE FEET, AND APPROXIMATELY 45-46 LBS. OF WOOD CELLULOSE FIBER MULCH
PER 1,000 SQUARE FEET IN ALL AREAS TO BE SEEDED. ADD APPROXIMATELY 1 LB. OF TACKIFIER PER 1,000
SQUARE FEET FOR SLOPES AS NECESSARY.
COMMON TIMOTHY (Phleum pratensis) 5%%%
COMMON VELVETGRASS (Holcus lanatus) 5%%%
ΤΟΚ≅ΜΧ Μ≅ΣΗΥ∆ Ρ∆∆Χ ΛΗΩΚΝΝΟ ΘΝ≅Χ(PRIVATE ROAD)\A1;50.0' FORESTED BUFFER
\A1;13.4' R/W DEDICATION
\A1;5.0' CONCRETE SIDEWALK (TYP.)
\A1;10.0' PROPOSED UTILITY EASEMENT
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EASTING ELEV.----BCR
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3/41/4NORTHING
=95%%D13'51"L=33.24'R=20.00'
ΒΤΘΑ Ε Σ≅ΑΚ∆Κ
112491.24 1277539.21 417.45
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416.03112466.48 1277555.33
1
EASTING ELEV.----BCR
1/2
ECR
3/41/4NORTHING
L=30.43'
ΒΤΘΑ Ε Σ≅ΑΚ∆Κ
112425.83 1277525.11 417.60
417.38
417.17
416.96
416.75112441.35 1277547.90
2
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
04/21/2021
H=1.5'H=1.3'H=1.2'H=0.9'H=2.2'H=1.4'H=0.9'µ
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0 ΡΣΝΘΞ < 34& ΓΗΦΓ Λ≅Ω−
ΕΕ Υ≅ΘΗ∆Ρ
< 3/0−18 , 3/3−60
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-02.dwg4/19/2021 2:07 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-02
LGB
JJH
04/23/2021
ΦΘ,/1
7 34
SEE SHEET GR-04 FOR CONTINUATIONSEE SHEET GR-01 FOR CONTINUATION\A1;5.0' CONCRETE SIDEWALK (TYP.)
ϑ∆Ξ Λ≅Ο
NOT TO SCALE
(PUBLIC RIGHT OF WAY)ς∆Ξ∆ΘΓ≅∆ΤΡ∆Θ ς≅Ξ Ρ−\pxqc;WETLAND DQ (CAT. III)
\A1;50.0' FORESTED BUFFER
ΡΝΗΚΡ Θ∆ΟΝΘΣ ΜΝΣ∆Ρ9
THE FOLLOWING SOILS REPORT NOTES FOR THE SITE SHALL BE CONSIDERED PART OF
THESE CONSTRUCTION DOCUMENTS:
SOILS INVESTIGATION:
AS PERFORMED BY:
GEOENGINEERS, INC
1101 SOUTH FAWCETT AVE, SUITE 200
TACOMA, WA 98402
FILE NUMBER 22247-001-02
DATED: MARCH 9, 2017
1. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO ENSURE THAT ALL
PROVISIONS OF THE SOILS REPORT FOR THE SITE BE OBSERVED AND COMPLIED WITH
DURING ALL PHASES OF THE SITE PREPARATION, GRADING OPERATIONS, FOUNDATION,
SLAB, AND PAVING CONSTRUCTION AS APPLICABLE FOR THE PROJECT.
2. ANY PROVISIONS OF THE SOILS REPORT WHICH CONFLICT WITH INFORMATION SHOWN
ELSEWHERE ON THESE DRAWINGS, OR WHICH REQUIRE FURTHER CLARIFICATION, SHALL
BE BROUGHT TO THE ATTENTION OF THE SOILS ENGINEER.
3. A REPRESENTATIVE FOR THE SOILS ENGINEER SHALL BE AVAILABLE TO OBSERVE AND
APPROVE THE EARTHWORK OPERATIONS AND TO VERIFY FIELD CONDITIONS AS WORK
PROCEEDS. THE SOILS ENGINEER SHALL SUBMIT FIELD REPORTS CERTIFYING THAT THE
METHODS AND MATERIALS OF THE EARTHWORK OPERATIONS WERE IN ACCORDANCE WITH
THE RECOMMENDATION OF THE SOILS INVESTIGATION AND THAT THE WORK WAS
PERFORMED TO THE SATISFACTION OF THE SOILS ENGINEER. THE SOILS ENGINEER SHALL
BE CONTRACTED DIRECTLY WITH OWNER AND COORDINATE SOILS WORK BETWEEN OWNER
AND CONTRACTOR.
4. THE CONTRACTOR SHALL MAKE ALL PROVISIONS FOR SOILS INSPECTIONS AS
RECOMMENDED WITHIN SOILS REPORT. AS A MINIMUM, THIS INCLUDES THE OBSERVATION
OF THE FOLLOWING BY A SOILS ENGINEER:
{· }PLACEMENT OF STRUCTURAL FILL MATERIAL BENEATH FUTURE BUILDINGS AND
PAVEMENT
{· }ROCKERIES OVER 4 FEET AND THE ASSOCIATED GEOGRID PLACEMENT, AND
CONSTRUCTION
{· }ANY SLOPES 3 TO 1 AND STEEPER
5. WHERE NEW STRUCTURAL FILL WILL BE PLACED ON SLOPES STEEPER THAN 5H:1V, THE
FILL SHOULD BE KEYED AND BENCHED INTO SUITABLE UNDERLYING NATIVE SOILS PER
∂
∂
∂
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
04/21/2021
TT H=4.3'H=4.3'H=4.4'H=4.5'µ
ΒΝΜΣΝΤΘ ΗΜΣ∆ΘΥ≅Κ < 1&
ΡΒ≅Κ∆9 0! <
0 10
1/&
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N
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A
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40111ANO
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N
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P
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114+771 ΡΕ
0 ΡΣΝΘΞ < 34& ΓΗΦΓ Λ≅Ω−
ΕΕ Υ≅ΘΗ∆Ρ
< 3/0−18 , 3/3−60
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-03.dwg4/19/2021 2:11 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-03
LGB
JJH
04/23/2021
ΦΘ,/2
8 34SEE SHEET VIEW AT RIGHT FOR CONTINUATIONΚΝΝΟ ΘΝ≅Χ(PRIVATE ROAD)\A1;5.0' CONCRETE SIDEWALK (TYP)
ϑ∆Ξ Λ≅Ο
NOT TO SCALE
SEE SHEET GR-01 FOR CONTINUATION
SEE SHEET VIEW AT LEFT FOR CONTINUATION
SEE SHEET GR-05 FOR CONTINUATION\A1;5.0' CONCRETE SIDEWALK (TYP)
114+771 ΡΕ
0 ΡΣΝΘΞ < 34& ΓΗΦΓ Λ≅Ω−
ΕΕ Υ≅ΘΗ∆Ρ
< 3/0−18 , 3/3−60
ΚΝΝΟ ΘΝ≅Χ(PRIVATE ROAD)1
2
EASTING ELEV.----BCR
1/2
ECR
3/41/4NORTHING
=99%%D28'41"L=34.72'R=20.00'
ΒΤΘΑ Ε Σ≅ΑΚ∆Κ
111639.77 1277560.34 405.81
405.43
405.06
404.69
404.31111615.91 1277579.38
1
EASTING ELEV.----BCR
1/2
ECR
3/41/4NORTHING
L=27.22'
ΒΤΘΑ Ε Σ≅ΑΚ∆Κ
111575.05 1277545.45 404.81
404.25
403.71
403.17
402.6311590.30 1277565.46
2
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
04/21/2021
AAA
µ
ΒΝΜΣΝΤΘ ΗΜΣ∆ΘΥ≅Κ < 1&
ΡΒ≅Κ∆9 0! <
0 10
1/&
4020
(PUBLIC RIGHT OF WAY)ς∆Ξ∆ΘΓ≅∆ΤΡ∆Θ ς≅Ξ Ρ−N
ETRAB
.G
A
RU
A
40111ANO
R
WFOE
A SH NGTO
N
T E R ED
SG
EN G
NEE
EFOR
P
TS
SS
TA
ER
N
A
E
G
H
114+771 ΡΕ
0 ΡΣΝΘΞ
< 34& ΓΗΦΓ Λ≅Ω− ΕΕ
Υ≅ΘΗ∆Ρ
< 3/0−18 , 3/3−60
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-04.dwg4/19/2021 2:14 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-04
LGB
JJH
04/23/2021
ΦΘ,/3
0/34
SEE SHEET GR-02 FOR CONTINUATION
\A1;5.0' CONCRETE SIDEWALK (TYP)
ϑ∆Ξ Λ≅Ο
NOT TO SCALE
SEE SHEET GR-05 FOR CONTINUATION
\A1;50.0' FORESTED BUFFER
WETLAND DR
(CAT. III)Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ
BOTTOM WIDTH
BOTTOM LENGTH
TOP WIDTH
TOP LENGTH
SIDE SLOPES
OVERFLOW ELEV.
TOP RISER PIPE ELEV
BOTTOM ELEV
0'
89.5'
42'
131.5'
3:1 (TYP.)
396
396390
TOP POND ELEV
ORIFICE DIAMETER (IN)
RISER SIZE (IN)
397
2.43"
∀0
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
POND DEPTH 7'
SURFACE AREA REQUIRED 3,583 SF
SURFACE AREA PROVIDED 5,523 SF
1"=
1"=ΡΒ≅Κ∆9 HORIZ.
VERT.
20'
5'
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ ∀0 ΒΘΝΡΡ Ρ∆ΒΣΗΝΜ ≅,≅
1"=
1"=ΡΒ≅Κ∆9 HORIZ.
VERT.
20'
5'
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ ∀0 ΒΘΝΡΡ Ρ∆ΒΣΗΝΜ Α,Α
BOTTOM=390.00
TOP=397.00
\A1;4.0'\A1;4.0'
\A1;89.5'3:13:1\A1;4.0'\A1;4.0'
\A1;131.5'
\A1;42.0'
BOTTOM=390.00
TOP=397.00
3:13:1≅
≅
\A1;42.0'\A1;131.5'ΑΑ
04/21/2021
GAS
XFMRPIV
H=8.4'H=7.4'H=6.0'H=8.7'H=7.9'H=5.4'H=4.0'H=2.5'µ
ΒΝΜΣΝΤΘ ΗΜΣ∆ΘΥ≅Κ < 1&
ΡΒ≅Κ∆9 0! <
0 10
1/&
4020(PUBLIC RIGHT OF WAY)ς∆Ξ∆ΘΓ≅∆ΤΡ∆Θ ς≅Ξ Ρ−N
ETRAB
.G
A
RU
A
40111ANO
R
WFOE
A SH NGTO
N
T E R ED
SG
ENG
NEE
EFOR
P
TS
SS
TA
ER
N
A
E
G
H
114+771 ΡΕ
0 ΡΣΝΘΞ < 34& ΓΗΦΓ Λ≅Ω−
ΕΕ Υ≅ΘΗ∆Ρ
< 3/0−18 , 3/3−60
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-05.dwg4/19/2021 2:19 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-05
LGB
JJH
04/23/2021
ΦΘ,/4
00 34SEE SHEET GR-03 FOR CONTINUATION\A1;5.0' CONCRETE SIDEWALK (TYP)
ϑ∆Ξ Λ≅Ο
NOT TO SCALE
SEE SHEET GR-04 FOR CONTINUATION
\A1;50.0' FORESTED BUFFER
SEE SHEET GR-06 FOR CONTINUATION
\A1;EX. 30.0' TELEPHONE EASEMENT
WETLAND DT
(CAT. III)
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ
BOTTOM WIDTH
BOTTOM LENGTH
TOP WIDTH
TOP LENGTH
SIDE SLOPES
OVERFLOW ELEV.
TOP RISER PIPE ELEV
BOTTOM ELEV
0'
105'
42'
147'
3:1 (TYP.)
399
398393
TOP POND ELEV
ORIFICE DIAMETER (IN)
RISER SIZE (IN)
400
2.58"
∀1
Ε
Ε
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
POND DEPTH 6'
SURFACE AREA REQUIRED 2,208 SF
SURFACE AREA PROVIDED 6,174 SF
1"=
1"=ΡΒ≅Κ∆9 HORIZ.
VERT.
20'
5'
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ ∀1 ΒΘΝΡΡ Ρ∆ΒΣΗΝΜ Β,Β
BOTTOM=393.003:11"=
1"=ΡΒ≅Κ∆9 HORIZ.
VERT.
20'
5'
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ ∀1 ΒΘΝΡΡ Ρ∆ΒΣΗΝΜ Χ,Χ
BOTTOM=393.00
TOP=400.00
TOP=400.003:1\A1;4.0'\A1;147.0'\A1;4.0'
\A1;105.0'
\A1;4.0'\A1;42.0'\A1;4.0'3:13:1Χ
ΒΒ
Χ
\A1;42.0'
\A1;147.0'
04/21/2021
P
P
µ
ΒΝΜΣΝΤΘ ΗΜΣ∆ΘΥ≅Κ < 1&
ΡΒ≅Κ∆9 0! <
0 10
1/&
4020
N
ETRAB
.G
A
RU
A
40111ANO
R
WFOE
A SH NGTO
N
T E RED
SG
ENG
NEE
EFOR
P
TS
SS
TA
ER
N
A
E
G
H
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-06.dwg4/19/2021 2:23 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-06
LGB
JJH
04/23/2021
ΦΘ,/5
01 34
SEE SHEET GR-05 FOR CONTINUATION
SEE VIEW AT RIGHT FOR CONTINUATION
SEE VIEW AT LEFT FOR CONTINUATION
SEE SHEET GR-07 FOR CONTINUATIONϑ∆Ξ Λ≅Ο
NOT TO SCALE
\A1;15.0' STORM DRAINAGE EASEMENT
\A1;100.0' FORESTED BUFFER
\A1;100.0' FORESTED BUFFER
ΡΣ≅
Σ
∆
Θ
Ν
Τ
Σ
∆ 07
\A1;EX. 30.0' TELEPHONE EASEMENT
\A1;EX. 15.0' SANITARY SEWER EASEMENT
\A1;15.0' TEMPORARY GRAVEL ACCESS ROAD
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
04/21/2021
C.B.P
P
P
P
µ
ΒΝΜΣΝΤΘ ΗΜΣ∆ΘΥ≅Κ < 1&
ΡΒ≅Κ∆9 0! <
0 10
1/&
4020
N
ETRAB
.G
A
RU
A
40111ANO
R
WFOE
A SH NGTO
N
T E R ED
SG
ENG
NEE
EFOR
P
TS
SS
TA
ER
N
A
E
G
H
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-07.dwg4/19/2021 2:25 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING PLANWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-07
LGB
JJH
04/23/2021
ΦΘ,/6
02 34SEE SHEET GR-06 FOR CONTINUATIONϑ∆Ξ Λ≅Ο
NOT TO SCALEΚΝΝΟ ΘΝ≅Χ(PRIVATE ROAD)\A1;6.0' BENCH
\A1;100.0' FORESTED BUFFER
\A1;15.0' GRAVEL ACCESS ROAD
\A1;6.0' BENCH
≅
≅
\A1;15.0' ACCESS ROAD
ΑΑ
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
R
04/21/2021
N
ETRAB
.G
A
RU
A
40111ANO
R
WFOE
A SH NGTO
N
T E R ED
SG
ENG
NEE
EFOR
P
TS
SS
TA
ER
N
A
E
G
H
NO.DESCRIPTION/DATE BY
REVISIONS
DWG. NAME:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
DATE:
OF SHEETS
JOB NO.:
PRINT:
DATE OF
\\\\esm8\\engr\\esm-jobs\\1886\\001\\016-0015\\plots\\construction plans\\GR-08.dwg4/19/2021 2:47 PMPlotted:File:Plotted By: Greg FedoreEVERETTFEDERAL WAYΒ Ν Μ Ρ Τ Κ Σ Η Μ Φ ∆ Μ Φ Η Μ ∆ ∆ Θ ΡΚ Κ ΒCivil EngineeringProject ManagementLand SurveyingLandscape ArchitectureLand Planningwww.esmcivil.com(253) 838-6113(425) 297-9900Public WorksΕδχδθκ ςξ+ ς≅ 87//2223// 7σγ ≅υδ Ρ+ Ρτησδ 1/4≅ ΟΝΘΣΗΝΜ ΝΕ Ρ∆ΒΣΗΝΜ 10+ Σ−10 Μ−+ Θ− 3 ∆−+ ς−Λ−Ε∆Χ∆Θ≅Κ ς≅Ξ Β≅ΛΟΤΡ+ ΚΚΒςΝΝΧΑΘΗΧΦ∆ ΑΤΗΚΧΗΜΦ !≅!T.E.S.C. AND GRADING NOTES AND DETAILSWASHINGTONCITY OF FEDERAL WAY1886-001-016
GR-08
LGB
JJH
04/23/2021
ΦΘ,/7
03 34
NOT TO SCALE
ΘΝΒϑ,ΚΗΜ∆Χ ΒΝΜΡΣΘΤΒΣΗΝΜ ∆ΜΣΘ≅ΜΒ∆ Χ∆Σ≅ΗΚ
R = 25' MIN. (OPTIONAL)
8" THICK MIN.
4" - 8" QUARRY SPALLS
100' (MIN.)
EXISTING ROADWAY
20' MIN.(22' - 24' TYP.)
∆ΘΝΡΗΝΜ.Ρ∆ΧΗΛ∆ΜΣ≅ΣΗΝΜ ΒΝΜΣΘΝΚ ΜΝΣ∆Ρ9
WITH SEDIMENT
RUNOFF WATER
CATCH BASIN W/GRATE
OVERFLOW
FILTER FABRIC
GEOTEXTILE MATERIAL
FILTERED WATER
NOT TO SCALE
ΗΜΚ∆Σ ΟΘΝΣ∆ΒΣΗΝΜ Χ∆Σ≅ΗΚ
0.5' MIN.
1
3"1' FREEBOARD MIN.SWALE FLOW LINE
KEY ROCK INTOSWALE 3" MIN.
* DEPENDING ON SOIL CONDITIONS
VARIES *
VARIES *2' MIN.B
2
1
2
2
1
A
ELEVATION
1
2
2" TO 4" QUARRY SPALLS
3" MIN.
SPACING BETWEEN CHECK DAMS:
L = THE DISTANCE SUCH THAT
POINTS A & B ARE OF EQUAL
%%uROCK CHECK DAM X-SECTION
%%UINTERCEPTOR SWALE X-SECTION & ROCK CHECK DAM
ΗΜΣ∆ΘΒ∆ΟΣΝΘ Ρς≅Κ∆ ϖ. ΘΝΒϑ ΒΓ∆Βϑ Χ≅Λ
3' MIN.
NOTE:
IF THE IDS OR SCC DO NOT REGULARLY
RETAIN STORM RUNOFF, THE CAPACITY
AND/OR FREQUENCY OF THEM SHALL BE
INCREASED.
ALL OF THE FOLLOWING PROVISIONS FOR WET SEASON CONSTRUCTION ARE DETAILED IN THE REFERENCED SECTIONS. THESE REQUIREMENTS ARE LISTED HERE FOR THE CONVENIENCE
OF THE DESIGNER AND THE REVIEWER.
1. THE ALLOWED TIME THAT A DISTURBED AREA MAY REMAIN UNWORKED WITHOUT COVER MEASURES IS REDUCED TO TWO CONSECUTIVE WORKING DAYS, RATHER THAN SEVEN.
2. STOCKPILES AND STEEP CUT AND FILL SLOPES ARE TO BE PROTECTED IF UNWORKED FOR MORE THAN 12 HOURS.
3. COVER MATERIALS SUFFICIENT TO COVER ALL DISTURBED AREAS SHALL BE STOCKPILED ON SITE.
4. ALL AREAS THAT ARE TO BE UNWORKED DURING THE WET SEASON SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON.
5. MULCH IS REQUIRED TO PROTECT ALL SEEDED AREAS.
6. FIFTY LINEAR FEET OF SILT FENCE (AND THE NECESSARY STAKES) PER ACRE OF DISTURBANCE MUST BE STOCKPILED ON SITE.
7. CONSTRUCTION ROAD AND PARKING LOT STABILIZATION ARE REQUIRED FOR ALL SITES UNLESS THE SITE IS UNDERLAIN BY COARSE-GRAINED SOIL.
8. SEDIMENT RETENTION IS REQUIRED UNLESS NO OFFSITE DISCHARGE IS ANTICIPATED FOR THE SPECIFIED DESIGN FLOW.
9. SURFACE WATER CONTROLS ARE REQUIRED UNLESS NO OFFSITE DISCHARGE IS ANTICIPATED FOR THE SPECIFIED DESIGN FLOW.
10. PHASING AND MORE CONSERVATIVE BMPS MUST BE EVALUATED FOR CONSTRUCTION ACTIVITY NEAR SURFACE WATERS.
11. ANY RUNOFF GENERATED BY DEWATERING MAY BE REQUIRED TO DISCHARGE TO THE SANITARY SEWER (WITH APPROPRIATE DISCHARGE AUTHORIZATION), PORTABLE SAND FILTER
SYSTEMS, OR HOLDING TANKS.
12. THE FREQUENCY OF MAINTENANCE REVIEW INCREASES FROM MONTHLY TO WEEKLY.
ς∆Σ Ρ∆≅ΡΝΜ ΡΟ∆ΒΗ≅Κ ΟΘΝΥΗΡΗΝΜΡ
SEE GR-01 FOR
INFLOW
SILT FENCE OR EQUIVALENT DIVIDER
KEY DIVIDER INTO SLOPE TO
PREVENT FLOW AROUND SIDES
POND LENGTH SHALL BE 3
TO 4 TIMES THE MAXIMUM
POND WIDTH
POND DIMENSIONS
POND PLAN VIEW
≅
≅
Α
Α
RISER PIPE, SEE DETAIL ABOVE
VARIES
\A1;6'W.S. ELEV.TOP ELEV.
BOTTOM ELEV.
3:1 3:1 3:13:1SEE SEDIMENT POND TABLE ON
SHEET GR-04 AND GR-05 FOR ELEVATIONS\A1;6'ANTI-SEEP COLLARS
WEIGHTED BASE TO PREVENT FLOATATION
3.58" DEWATERING OUTLET
12" CORRUGATED METAL RISER PIPE, OPEN AT TOP (PRINCIPAL SPILLWAY)
PROVIDE A REBAR TRASH RACK
WIRE BACKED SILT FENCE,
STAKED HAYBALES, WRAPPED
WITH FILTER FABRIC, OR
EQUIVALENT APPROVED EQUAL.
6' MIN.
12" %%C S.D.3:11' FREEBOARD
3
1
MIN. 2' SETTLING DEPTH
SEDIMENT STORAGE1.5' MAXIMUM DEPTH
6"%%C DEWATERING DEVICE
(SEE
GEOTECHNICAL ENGINEERS RECOMENDATIONS.
ALL BERMS SHALL BE CONSTRUCTED PER
DISCHARGE PER PLAN
CROSS SECTION A-A
CROSS SECTION B-B
EMBANKMENT COMPACTED TO 95%.
PERVIOUS MATERIALS SUCH AS GRAVEL OR CLEAN SAND
SHALL NOT BE USED.
DISCHARGE PER PLAN
RISER DETAIL
COUPLING
MAY BE USED TO PREVENT FLOTATION
ALTERNATIVELY, METAL STAKES AND WIRECONC. BASE
6" MIN.
TACK WELDWATERTIGHT
WITH ASTM F667 AND AASHTO M294.
ORIFICE. TUBING SHALL COMPLY
POLYETHYLENE PERFORATED
DRAINAGE TUBING, DIAMETER MIN.
2" LARGER THAN DEWATERING
STRAPPING
METAL RISER PIPE
CORRUGATED
OPEN TOP
PROVIDE ADEQUATE
DIAMETER PER PLANS.
WRAP W/ FILTER FABRIC FULL LENGTH.3.58"%%C DEWATERING ORIFICE, SCHEDULE 40 STEEL STUB MINIMUM.
EMERGENCY OVERFLOW SPILLWAY
W/ RIP-RAP PAD
NOT TO SCALE
Ρ∆ΧΗΛ∆ΜΣ ΟΝΜΧ
NOT TO SCALE
\A1;6'
RIP-RAP PAD=12' MIN.
ROCK LINING=8' MIN.
RIP-RAP PAD=2 FEET DEEP
ROCK LINING=1 FOOT DEEP
OUTLET PIPE
PLAN
PROFILE 1. ROCK LINING SHALL BE QUARRY SPALLS WITH GRADATION AS FOLLOW:
PASSING 8-INCH SQUARE SIEVE: 100%
PASSING 3-INCH SQUARE SIEVE: 40 TO 60% MAXIMUM
PASSING 3/4-INCH SQUARE SIEVE: 0 TO 10% MAXIMUM
2. RIP-RAP SHALL BE REASONABLY WELL GRADED WITH GRADATION AS
FOLLOWS:
MAXIMUM STONE SIZE: 24 INCHES (NOMINAL DIAMETER)
MEDIAN STONE SIZE: 16 INCHES
MINMUM STONE SIZE: 4 INCHES
\A1;6"
ΝΤΣΕ≅ΚΚ ΘΝΒϑ ΚΗΜ∆Χ
ΘΗΟ,Θ≅Ο Ο≅Χ Χ∆Σ≅ΗΚ
STEEL POSTS)
OF FILL SLOPES WITH
(4' MAX AT BOTTOM12" MIN.2' MIN.6' MAX.IN 4"x4" TRENCH
BURY BOTTOM OF FILTER MATERIAL
USE STAPLES, WIRE RINGS OR EQUIVALENT TO ATTACH
JOINTS IN FILTER FABRIC SHALL BE SPLICED AT POSTS.
FABRIC TO POSTS.
STANDARD FILTER FABRIC MATERIAL
FLOW 2' MIN.ΣΞΟΗΒ≅Κ ΝΘ≅ΜΦ∆ Ε≅ΑΘΗΒ Ε∆ΜΒ∆ Χ∆Σ≅ΗΚ
ANY DAMAGE SHALL BE REPAIRED IMMEDIATELY.
IF CONCENTRATED FLOWS ARE EVIDENT UPHILL OF THE FENCE, THEY MUST BE INTERCEPTED AND CONVEYED TO A
IT IS IMPORTANT TO CHECK THE UPHILL SIDE OF THE FENCE FOR SIGNS OF THE FENCE CLOGGING AND ACTING AS
A BARRIER TO FLOW AND THEN CAUSING CHANNELIZATION OF FLOWS PARALLEL TO THE FENCE. IF THIS OCCURS,
REPLACE THE FENCE AND/OR REMOVE THE TRAPPED SEDIMENT.
IF THE FILTER FABRIC HAS DETERIORATED DUE TO ULTRAVIOLET BREAKDOWN, IT SHALL BE REPLACED.
SEDIMENT MUST BE REMOVED WHEN THE SEDIMENT IS 6" HIGH.
SEDIMENT TRAP OR POND.
5.
3.
4.
2.
1.12" MIN.8"
4"
2" BY 2" BY 14 GA. WIRE OR EQUIVALENT. IF STANDARD STRENGTH FABRIC USED. FABRIC TO BE .02 PERMITTIVITY.
2" BY 4" WOOD POSTS, STEEL FENCE POSTS, REBAR OR EQUIVALENT
.02 PERMITTIVITY FABRIC OR EQUIV.
FILTER FABRIC FENCES SHALL BE INSTALLED ALONG CONTOUR WHENEVER POSSIBLE.
MINIMUM 4"x4" TRENCH BACKFILL TRENCH WITH NATIVE SOIL
(ONLY ADJACENT TO CRITICAL AREAS)
ORANGE FILTER FABRIC MATERIAL
Φ∆Μ∆Θ≅Κ ΜΝΣ∆Ρ
1. APPROVAL OF THIS EROSION/SEDIMENTATION CONTROL (ESC) PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (I.E.
SIZE AND LOCATION OF ROADS, PIPES, RESTRICTORS, CHANNELS, RETENTION FACILITIES, UTILITIES, ETC.)
2. THE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE ESC FACILITIES IS THE
RESPONSIBILITY OF THE APPLICANT/CONTRACTOR UNTIL ALL CONSTRUCTION IS APPROVED.
3. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE CLEARLY FLAGGED IN THE FIELD PRIOR TO CONSTRUCTION. DURING THE
CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE FLAGGED CLEARING LIMITS SHALL BE PERMITTED. THE FLAGGING SHALL BE MAINTAINED BY THE
APPLICANT/CONTRACTOR FOR THE DURATION OF CONSTRUCTION.
4. THE ESC FACILITIES SHOWN ON THESE PLAN MUST BE CONSTRUCTED IN CONJUNCTION WITH ALL CLEARING AND GRADING ACTIVITIES, AND IN SUCH A MANNER
AS TO INSURE THAT SEDIMENT LADEN WATER DOES NOT ENTER THE DRAINAGE SYSTEM OR VIOLATE APPLICABLE WATER STANDARDS.
5. THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE
ESC FACILITIES SHALL BE UPGRADED (I.E. ADDITIONAL SUMPS, RELOCATION OF DITCHES AND SILT FENCES, ETC.) AS NEEDED FOR UNEXPECTED STORM EVENTS.
6. THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/CONTRACTOR AND MAINTAINED AS NECESSARY TO ENSURE THEIR CONTINUED
FUNCTIONING.
7. ANY AREA STRIPPED OF VEGETATION, INCLUDING ROADWAY EMBANKMENTS, WHERE NO FURTHER WORK IS ANTICIPATED OR A PERIOD OF 15 DAYS, SHALL BE
IMMEDIATELY STABILIZED WITH TH APPROVED ESC METHODS (I.E. SEEDING, MULCHING, NETTING, EROSION BLANKETS, ETC.)
8. ANY AREA NEEDING ESC MEASURES, NOT REQUIRING IMMEDIATE ATTENTION, SHALL BE ADDRESSED WITHIN 15 DAYS.
9. THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN THE 48 HORS FOLLOWING A STORM
EVENT.
10. AT NO TIME SHALL MORE THAN ONE FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES
SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT-LADEN WATER INTO THE DOWNSTREAM SYSTEM.
11. STABILIZED CONSTRUCTION ENTRANCES AND WASH PADS SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION
OF THE PROJECT. ADDITIONAL MEASURES MAY BE REQUIRED TO INSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT.
12. WET SEASON REQUIREMENTS AS DESCRIBED IN APPENDIX D, SECTION D.5.2 OF THE KCSWDM ARE IN EFFECT BEGINNING OCTOBER 1 THROUGH APRIL 30.
13. ANY PERMANENT RETENTION/DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL BE MODIFIED WITH THE NECESSARY EROSION CONTROL
MEASURES AND SHALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE PERMANENT FACILITY IS TO FUNCTION ULTIMATELY AS AN INFILTRATION OR DISPERSION
SYSTEM, THE FACILITY SHALL {NOT} BE USED AS A TEMPORARY SETTLING BASIN. NO UNDERGROUND DETENTION TANKS OR VAULTS SHALL BE USED AS A
TEMPORARY SETTLING BASIN.
14. WHERE SEEDING FOR TEMPORARY EROSION CONTROL IS REQUIRED, FAST GERMINATING GRASSES SHALL BE APPLIED AT AN APPROPRIATE RATE (I.E. ANNUAL
OR PERENNIAL RYE APPLIED AT APPROXIMATELY 80 POUNDS PER ACRE).
15. WHERE STRAW MULCH FOR TEMPORARY EROSION CONTROL IS REQUIRED, IT SHALL BE APPLIED AT A MINIMUM THICKNESS OF TWO INCHES.
16. MANAGEMENT PRACTICES PROVIDING SIGNIFICANT TREE PROTECTION SHALL BE PROVIDED PER SECTION 22-1568 (C)(6)A-G) OF FWRC.
APPROVED
DATE
PERMIT NO. 20-101386-CO
CITY OF FEDERAL WAY INSPECTION 253-835-2700
Know what's below.
before you dig.Call
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1. PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED TO THE CITY PRIOR TO PRE-CONSTRUCTION MEETING.
2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE FEDERAL WAY REVISED CODE (FWRC), APPLICABLE ORDINANCES, AND THE CITY COUNCIL CONDITIONS OF PROJECT
APPROVAL. THESE DOCUMENTS ARE SUPPLEMENTED BY THE MOST RECENT VERSION OF THE STANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION
(WSDOT/APWA), THE KING COUNTY ROAD STANDARDS (KCRS), AND THE KING COUNTY SURFACE WATER DESIGN MANUAL (KCSWDM). IT SHALL BE THE SOLE RESPONSIBILITY OF THE
APPLICANT AND THE PROFESSIONAL ENGINEER TO CORRECT ANY ERROR, OMISSION, OR VARIATION FROM THE ABOVE REQUIREMENTS FOUND IN THESE PLANS. ALL CORRECTIONS
SHALL BE AT NO ADDITIONAL COST OR LIABILITY TO THE CITY OF FEDERAL WAY.
3. THE DESIGN ELEMENTS WITHIN THESE PLANS HAVE BEEN REVIEWED ACCORDING TO THE FEDERAL WAY ENGINEERING REVIEW CHECKLIST. SOME ELEMENTS MAY HAVE BEEN
OVERLOOKED OR MISSED BY THE CITY ENGINEERING PLAN REVIEWER. ANY VARIANCE FROM ADOPTED STANDARDS IS NOT ALLOWED UNLESS SPECIFICALLY APPROVED BY THE CITY
OF FEDERAL WAY, PRIOR TO CONSTRUCTION.
4. APPROVAL OF THIS ROAD, GRADING, AND DRAINAGE PLAN DOES NOT CONSTITUTE AN APPROVAL OF ANY OTHER CONSTRUCTION (I.E. DOMESTIC WATER CONVEYANCE, SEWER
CONVEYANCE, GAS, ELECTRICITY, ETC.)
5. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY, A PRECONSTRUCTION MEETING MUST BE HELD BETWEEN THE CITY OF FEDERAL WAY, THE APPLICANT, AND THE
APPLICANT'S CONSTRUCTION REPRESENTATIVE.
6. A SIGNED COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS.
7. ON-SITE CONSTRUCTION NOISE SHALL BE LIMITED AS PER FWRC (SECTION 19.105.040); NORMALLY THIS IS 7:00 A.M. TO 8:00 P.M., MONDAY THROUGH FRIDAY, AND 9:00 A.M. TO 8:00
P.M. ON SATURDAYS.
8. RIGHT-OF-WAY CONSTRUCTION IS ALLOWED 8:30 A.M. TO 3:00 P.M. MONDAY THROUGH FRIDAY. WRITTEN AUTHORIZATION TO WORK OUTSIDE OF THESE HOURS MUST BE GRANTED
BY THE PUBLIC WORKS DIRECTOR.
9. IT SHALL BE THE APPLICANT'S/CONTRACTOR'S RESPONSIBILITY TO OBTAIN ALL CONSTRUCTION EASEMENTS NECESSARY BEFORE INITIATING OFF-SITE WORK WITHIN THE ROAD
RIGHT-OF-WAY.
10. FRANCHISED UTILITIES OF OTHER INSTALLATIONS THAT ARE NOT SHOWN ON THESE APPROVED PLANS SHALL NOT BE CONSTRUCTED UNLESS AN APPROVED SET OF PLANS THAT
MEET ALL CITY REQUIREMENTS AND THE REQUIREMENTS OF KCRS CHAPTER 8 ARE SUBMITTED TO THE CITY OF FEDERAL WAY AT LEAST THREE DAYS PRIOR TO CONSTRUCTION.
11. VERTICAL DATUM SHALL BE KCAS OR NGVD-29.
12. GROUNDWATER SYSTEM CONSTRUCTION SHALL BE WITHIN A RIGHT-OF-WAY OR APPROPRIATE DRAINAGE EASEMENTS, BUT NOT UNDERNEATH THE ROADWAY SECTION. ALL
GROUNDWATER SYSTEMS MUST BE CONSTRUCTED IN ACCORDANCE WITH THE WSDOT/APWA STANDARD SPECIFICATIONS.
13. ALL UTILITY TRENCHES IN THE RIGHT-OF-WAY SHALL BE BACKFILLED 5/8{”} CRUSHED ROCK AND COMPACTED TO 95% DENSITY. WHEN TRENCH WIDTH IS 18 INCHES OR LESS, AND
IS WITHIN THE TRAVELED WAY, TRENCH WILL BE BACKFILLED WITH CONTROL DENSITY FILL (SELF-COMPACTED FLOWABLE FILL) AS DEFINED BY WSDOT 2-09.3(1)E. THE AGGREGATE
WILL BE 3/8-INCH MINUS.
14. ALL ROADWAY SUBGRADE SHALL BE BACKFILLED AND COMPACTED TO 95% DENSITY IN ACCORDANCE WITH WSDOT 2-06.3.
15. OPEN CUTTING OF EXISTING ROADWAYS IS NOT ALLOWED UNLESS SPECIFICALLY APPROVED BY THE PUBLIC WORKS DIRECTOR AND NOTED ON THESE APPROVED PLANS. ANY
OPEN CUT SHALL BE RESTORED IN ACCORDANCE WITH KCRS 8.03(B) 3.
16. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARDS, SAFETY DEVICES, PROTECTIVE EQUIPMENT, FLAGGERS, AND ANY OTHER NEEDED ACTIONS
TO PROTECT LIFE, HEALTH, AND SAFETY OF THE PUBLIC, AND TO PROTECT PROPERTY IN CONNECTION WITH THE PERFORMANCE OF WORK COVERED BY THE CONTRACTOR. ANY
WORK WITHIN THE TRAVELED RIGHT-OF-WAY THAT MAY INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE AT LEAST ONE FLAGGER FOR EACH LANE OF TRAFFIC AFFECTED. ALL
SECTIONS OF THE WSDOT STANDARD SPECIFICATIONS 1-07.23 - TRAFFIC CONTROL, SHALL APPLY.
17. CONTRACTOR SHALL PROVIDE AND INSTALL ALL REGULATORY AND WARNING SIGNS PER THE LATEST EDITION OF MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES.
18. ALL UTILITIES SHALL BE ADJUSTED TO FINAL GRADE AFTER PAVING ASPHALT WEARING COURSE.
19. ROCKERIES ARE CONSIDERED TO BE A METHOD OF BANK STABILIZATION AND EROSION ONLY. ROCKERIES SHALL NOT BE CONSTRUCTED TO SERVE AS RETAINING WALLS. ALL
ROCKERIES SHALL BE CONSTRUCTED IN ACCORDANCE WITH CFW DRAWING NUMBERS 3-22, 3-23. ROCKERIES MAY NOT EXCEED SIX FEET IN HEIGHT FOR CUT SECTIONS OR FOUR
FEET IN HEIGHT FOR FILL SECTIONS UNLESS DESIGNED BY A GEOTECHNICAL OR STRUCTURAL ENGINEER LICENSED IN THE STATE OF WASHINGTON.
”
04/21/2021
P a g e | 32
B. BMP Detail
Please see following pages for appropriate BMP details.
Below is a list of Alternative BMPs that can be used if the BMPs listed in the body of this
document are deemed ineffective by the CESCL.
Element #1 - Mark Clearing Limits
BMP C233: Silt Fence
Element #2 - Establish Construction Access
BMP C105: Stabilized Construction Entrance
BMP C107: Construction Road/Parking Area Stabilization
Element #3 - Control Flow Rates
BMP C207: Check Dams
BMP C241: Temporary Sediment Pond
Element #4 - Install Sediment Controls
BMP C207: Check Dams
BMP C233: Silt Fence
BMP C241: Temporary Sediment Pond
Element #5 - Stabilize Soils
BMP C120: Temporary and Permanent Seeding
BMP C121: Mulching
BMP C140: Dust Control
Element #6 - Protect Slopes
BMP C120: Temporary and Permanent Seeding
BMP C207: Check Dams
Element #7 - Protect Drain Inlets
BMP C220: Storm Drain Inlet Protection
Element #8 - Stabilize Channels and Outlets
BMP C207: Check Dams
Element #9 - Control Pollutants
BMP C151: Concrete Handling
BMP C152: Sawcutting and Surfacing Pollution Prevention
BMP C153: Material Delivery, Storage and Containment
Element #10 - Control Dewatering
BMP C251: Construction Stormwater Filtration
Element #11 - Maintain BMPs
BMP C160: Erosion and Sedimentation Control Lead
Element #12 - Manage the Project
BMP C160: Erosion and Sediment Control Lead
BMP C162: Scheduling
P a g e | 33
Element #13: Protect Low Impact Development
N/A
P a g e | 34
C. Correspondence
Please see following for any pertinent correspondence regarding this project.
P a g e | 35
D. Site Inspection Form
Please see following pages for the site inspection form.
P a g e | 36
E. Construction Stormwater General Permit (CSWGP)
Please see following attachment for the CSWGP
P a g e | 37
F. 303(d) List Waterbodies / TMDL Waterbodies Information
The project site is not listed as an impaired waterbody.
P a g e | 38
G. Contaminated Site Information
The project site has no known nor a history of contaiminates onsite.
P a g e | 39
H. Engineering Calculations
Please see following for calculations.