21-105282_10 Final TIR_12-17-2021-V1RECEIVED
Jan 03 2022
CITY OF FEDERAL WAY
COMMUNITY DEVELOPMENT
Commons at Federal Way
Pad
Water Quality Treatment Update
Final Modified Technical Information Report
G;°vnr�/FNr
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2i0WAL
7/2021
December 17, 2021
Prepared for
Merlone Geier Partners
457 SW 148th Street Suite #202
Burien, WA 98166
Submitted by
ESM Consulting Engineers, LLC
33400 8th Avenue S, Suite 205
Federal Way, WA 98003
253.838.6113 tel
253.838.7104 fax
C� M
www.esmcivil.com
Table of Contents
1. Project Overview...............................................................................................................1
2. Conditions and Requirements Summary...........................................................................3
3. Off -Site Analysis................................................................................................................5
4. Flow Control & Water Quality Facility Analysis and Design................................................6
5. Conveyance System Analysis and Design.........................................................................7
6. Special Reports and Studies.............................................................................................8
7. Other Permits....................................................................................................................9
8. ESC Analysis and Design................................................................................................10
9. Bond Quantities, Facility Summaries, and Declaration of Covenant................................11
10. Operations and Maintenance.........................................................................................12
Appendix A: Reference Maps..............................................................................................13
Appendix B: Developed Site Conditions..............................................................................14
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1. Project Overview
The purpose of this report is to encapsulate the documents and analysis required by the City
of Federal Way (City) in the form of a Final Modified Technical Information Report (report) for
Pad I within Sub -Basin #14 of The Commons at Federal Way. Sub -Basin #1 has been recently
upgraded from Basic to Enhanced Water Quality Treatment as documented in a previously
submitted Final Modified Technical Information Report by ESM Consulting Engineers, LLC.,
dated November 23, 2021 (November 23, 2021, TIR) and will treat the necessary portions of
the proposed Sub -Basin #14 improvements. The project is considered a redevelopment site
because the existing impervious surface coverage is more than 35%.
Existing Site:
The Commons at Federal Way - Sub -Basin #14 (Commons) project site is located in the
NW quarter of Section 16, Township 21, Range 04E, W.M., at 1701 S Commons in the City
of Federal Way, WA. The site is located on King County parcel 7622400015 (11.48 acres)
and is zoned CC-C. See Figure 1.1 for the vicinity map and the existing site conditions.
Existing Site Hydrology:
The project site is currently developed as parking lot with landscaping, lighting, and storm
drainage facilities. The area in and around the project site is generally flat and is located in
the Hylebos Creek drainage basin (WRIA number: 10). See Section 3 for more information
and Appendix D for soils information. Stormwater runoff from the parking lot area is
collected an existing conveyance system.
Proposed Site Improvements:
The proposed development includes the demolition of existing parking lot and the
construction of a building (identified as Pad 1), parking, utility services, and landscape
islands on 0.42 acres. See Appendix B for the proposed site improvements.
Proposed Site Hydrology:
Stormwater will continue to generally flow as it is currently routed in the existing stormwater
drainage system.
Flow Control:
Flow control for the entire Commons property (which includes the proposed improvements
in the project site) is provided by existing detention facilities. Since this project is considered
a redevelopment site, flow control mitigation is not required.
Flow Control BMP's:
Since flow control is not required for this redevelopment project, Flow control BMPs are also
not required.
Water Quality Treatment:
The entire Commons property was updated to (at the time) current water quality standards
between 2005 and 2014 to meet the standards of the 2009 King County Surface Water
Design Manual (SWDM). The property was divided into 14 water quality sub -basins and
Sub -Basin #1 was recently upgraded to meet the Enhance Water Quality Treatment criteria
of the 2009 (and 2016) SWDM, which is the current water quality mitigation standard for the
project site.
The project site is located within water quality Sub -Basin #14 and will use the recently
upgraded existing water quality treatment facility within Sub -Basin #1 to provide mitigation
for runoff from the pollution generating surfaces of the project site. Refer to the November
23, 2021, TIR and Section 4 of this report for more information.
Figure 1.1 -Vicinity Map
I
SITE
kA yA S.W. 320th ST. coi
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S. 336th ST. S
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S. 348th ST.
J �
S. 349th S'
VICINITY MAP
2
2. Conditions and Requirements Summary
Review of the 9 Core Requirements and 5 Special Requirements
This section describes howthe project will meet the SWDM Core and Special Requirements
(as applicable).
Core Requirement No. 1 Discharge at the Natural Location
The entire site is fully developed and will continue to drain to the natural discharge location
upon project completion.
Core Requirement No. 2 Off -site Analysis
The off -site analysis has been documented in Section 3 of the November 23, 2021, TIR.
Core Requirement No. 3 Flow Control
Flow Control is not required for this project because it is a redevelopment site.
Core Requirement No. 4 Conveyance System
Stormwater conveyance will perform as it does in the existing condition because the net
impervious area onsite will be slightly reduced from the original design conditions for the
existing conveyance system and the proposed system will use components (pipes,
catchbasins, etc.) of equal or greater capacity. No conveyance calculations are needed for
this project.
Core Requirement No. 5 Erosion and Sediment Control
Erosion and sediment controls to prevent the transport of sediment from the project site to
downstream drainage facilities, water resources, and adjacent properties is provided in
Section 8 of this report and on the construction plans.
Core Requirement No. 6 Maintenance and Operations
The Operations and Maintenance manual is included in Section 10 of this report.
Core Requirement No. 7 Financial Guarantees and Liability
All drainage facilities constructed or modified for projects will comply with the financial
guarantee requirements as provided in the King County Bond Quantities Worksheet. Bond
Quantities will be provided upon request.
Core Requirement No. 8 Water Quality
Enhanced Basic Water Quality Treatment will be provided by a recently upgraded water
quality filter vault within Sub -Basin #1. See Section 4 of this report and the November 23,
2021, TIR for details.
Core Requirement No. 9 Flow Control BMP's
Since flow control is not required for this redevelopment project, Flow control BMPs are also
not required.
Special Requirement No. 1 Other Adopted Area -Specific Requirements
This project does not have any Adopted Area -Specific Requirements; therefore, Special
Requirement No. 1 does not apply.
Special Requirement No. 2 Flood Hazard Area Delineation
The developed project site location is not in a 100-year floodplain. Special Requirement No.
2 does not apply.
Special Requirement No. 3 Flood Protection Facilities
The developed project site is not protected by an existing flood protection facility. The
proposed site improvements do not include the modification of an existing flood protection
facility. Special Requirement No. 3 does not apply.
Special Requirement No. 4 Source Control
No source control measures are being proposed at this time for the site.
Special Requirement No. 5 Oil Control
The project does not have a "high -use site characteristic" and is not a redevelopment of a
high -use site. Special Requirement No. 5 does not apply.
4
3. Off -Site Analysis
A complete downstream analysis of the Creekside Commons development per Core
Requirement #2 has been documented in Section 3 of the previously submitted November 23,
2021, TI R.
4. Flow Control & Water Quality Facility Analysis and Design
Existing Site Hydrology:
The project site is currently developed as parking lot with landscaping, lighting, and storm
drainage facilities. The existing impervious area is 0.30 acres and the existing landscaped
area is 0.12 acres for a total project site acreage of 0.42.
Developed Site Hydrology:
The developed condition of this project will drain to the same location as existing with very
similar flow rates due to the similarity in the land use type proportion. Since the project site
will remain predominantly impervious and match the existing stormwater drainage
characteristics, the site will have hydrology that matches the existing conditions.
Sub -Basin #1 will remain approximately the same in total area but will grow to absorb the
changes to Sub -Basin #14.
Sub -Basin #14 will be reduced and there are no longer any pollution generating surfaces
within Sub -Basin #14, as shown on the exhibit in Appendix A of this report.
The basin areas are summarized below:
Proposed Area (acres)
Pad I Roof
0.09
Sidewalk
0.11
Pavement
0.10
Total Impervious
0.30
Landscaping
0.12
Tota I Area
0.42
Flow Control:
Flow control for the entire Commons property (which includes the proposed improvements
in the project site) is provided by existing detention facilities. Since this project is considered
a redevelopment site, flow control mitigation is not required.
Flow Control BMP's:
Since flow control is not required for this redevelopment project, Flow control BMPs are also
not required.
Water Quality System:
The existing water quality treatment system for Pad I within Sub -Basin #14 provides basic
treatment for the existing parking lot area that is currently collected by the stormwater
system in that area. That system includes a flow splitter to bypass flows that exceed the
allowable treatment flow rate for the 3-cartidge Stormfilter unit.
The proposed pollution generating parking lot area within the original Sub -Basin #14 will
now drain to (and be treated by) Sub -Basin #1, as described in the November 23, 2021,
TIR. During final design, it was determined that the remaining proposed improvements
within the reduced Sub -Basin #14 include landscaping, sidewalk, and building roof which
are all considered to be non -pollution generating surfaces and do not require treatment. The
existing basic water quality treatment facility within Sub -Basin #14 is to be removed and
does not require replacement since that area consists entirely of non -pollution generating
surfaces. Refer to the exhibit on the following page for more information.
M
Sub -Basin break
moved due to
necessary grading
p I II \
o around proposed
/ co bulldin
------------ :�Z� U---------- ----------------------
Sub -Basin #1 -- - Sub -Basin #14 C a a '
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H1f10SilbMHJIH JI�IJbd _ o�� a PACIFIC HWY S EX CB, RIM=404.50 X CB, RIM=404.46 ® S= .89%
0 0 , E=401.50 12"0 CONC S
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Pollution Non -Pollution
FGenerating Surfaces Generatin Surfaces
Existing Conditions Proposed Conditions
5. Conveyance System Analysis and Design
Since Sub -Basin #14 is being reduced overall, the existing stormwater conveyance system is
anticipated to continue to operate as under current conditions; therefore, conveyance or
backwater calculations are not provided.
The total area draining to Sub -Basin #1 will be increased by 0.24 acres (approximately 3%)
from Sub -Basin #14. Since this increase is negligible, the existing stormwater conveyance
system for Sub -Basin #1 is anticipated to continue to operate as under current conditions;
therefore, conveyance and backwater calculations are not provided.
7
6. Special Reports and Studies
The Geotechnical Engineering Report by GeoTest Services, Inc., dated July 23, 2019 has
been previously submitted with the November 23, 2021, TIR.
The following reports were used as a reference in preparing this Final Modified Technical
Information Report.
• Commons at Federal Way by ESM Consulting Engineers, LLC, dated March 2005
• Future Pads C, D, E, F, & G: Commons at Federal Way by ESM Consulting Engineers,
LLC, dated February 2006.
• Memorandum to Kevin Peterson, City of Federal Way, by ESM Consulting Engineers,
LLC, dated March 13, 2013.
• Final Modified Technical Information Report by ESM Consulting Engineers, LLC, dated
November 23, 2021.
7. Other Permits
Building and NPDES permits will be required for this project, together with permits for utility
connections.
8. ESC Analysis and Design
The project disturbance area will be delineated with high -visibility fencing. Since the proposed
improvements will only expose soils below the existing pavement surface in the surrounding
area, the following BMPs are proposed to limit the amount of potential sediment transport
during construction:
• Construction Entrance
• High visibility fence
• Silt Fence
• Catch Basin Inlet Protection
The Erosion and Sedimentation Control Analysis is provided on the construction plans for Pad
1.
10
9. Bond Quantities, Facility Summaries, and Declaration of Covenant
The Bond Quantities worksheet will be provided upon request.
11
10. Operations and Maintenance
The Operations and Maintenance manual for the proposed Pad I project are provided in this
section of the report.
12
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES
NO.5 - CATCH BASINS AND MANHOLES
Maintenance
Defect or Problem
Condition When Maintenance is Needed
Results Expected When
Component
Maintenance is Performed
Structure
Sediment
Sediment exceeds 60% of the depth from the
Sump of catch basin contains no
bottom of the catch basin to the invert of the
sediment.
lowest pipe into or out of the catch basin or is
within 6 inches of the invert of the lowest pipe
into or out of the catch basin.
Trash and debris
Trash or debris of more than Y-i cubic foot which
No Trash or debris blocking or
is located immediately in front of the catch basin
potentially blocking entrance to
opening or is blocking capacity of the catch basin
catch basin.
by more than 10%.
Trash or debris in the catch basin that exceeds
No trash or debris in the catch
1/3 the depth from the bottom of basin to invert
basin.
the lowest pipe into or out of the basin.
Dead animals or vegetation that could generate
No dead animals or vegetation
odors that could cause complaints or dangerous
present within catch basin.
gases (e.g., methane).
Deposits of garbage exceeding 1 cubic foot in
No condition present which would
volume.
attract or support the breeding of
insects or rodents.
Damage to frame
Corner of frame extends more than % inch past
Frame is even with curb.
and/or top slab
curb face into the street (If applicable).
Top slab has holes larger than 2 square inches
Top slab is free of holes and cracks.
or cracks wider than '/4 inch.
Frame not sitting flush on top slab, i.e.,
Frame is sitting flush on top slab.
separation of more than % inch of the frame from
the top slab.
Cracks in walls or
Cracks wider than '/z inch and longer than 3 feet,
Catch basin is sealed and is
bottom
any evidence of soil particles entering catch
structurally sound.
basin through cracks, or maintenance person
judges that catch basin is unsound.
Cracks wider than '/z inch and longer than 1 foot
No cracks more than inch wide at
at the joint of any inlet/outlet pipe or any
the joint of inlet/outlet pipe.
evidence of soil particles entering catch basin
through cracks.
Settlement/
Catch basin has settled more than 1 inch or has
Basin replaced or repaired to design
misalignment
rotated more than 2 inches out of alignment.
standards.
Damaged pipe joints
Cracks wider than '/z-inch at the joint of the
No cracks more than'/4-inch wide at
inlet/outlet pipes or any evidence of soil entering
the joint of inlet/outlet pipes.
the catch basin at the joint of the inlet/outlet
pipes.
Contaminants and
Any evidence of contaminants or pollution such
Materials removed and disposed of
pollution
as oil, gasoline, concrete slurries or paint.
according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Inlet/Outlet Pipe
Sediment
Sediment filling 20% or more of the pipe.
Inlet/outlet pipes clear of sediment.
accumulation
Trash and debris
Trash and debris accumulated in inlet/outlet
No trash or debris in pipes.
pipes (includes floatables and non-floatables).
Damaged
Cracks wider than''/z-inch at the joint of the
No cracks more than'/4-inch wide at
inlet/outlet pipes or any evidence of soil entering
the joint of the inlet/outlet pipe.
at the joints of the inlet/outlet pipes.
2016 Surface Water Design Manual — Appendix A 4/24/2016
A-9
APPENDIX A MAINTENANCE REQUIREMENTS FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES
NO. 5 - CATCH BASINS AND MANHOLES
Maintenance
Defect or Problem
Condition When Maintenance is Needed
Results Expected When
Component
Maintenance is Performed
Metal Grates
Unsafe grate opening
Grate with opening wider than 7/8inch.
Grate opening meets design
(Catch Basins)
standards.
Trash and debris
Trash and debris that is blocking more than 20%
Grate free of trash and debris.
of grate surface.
footnote to guidelines for disposal
Damaged or missing
Grate missing or broken member(s) of the grate.
Grate is in place and meets design
Any open structure requires urgent
standards.
maintenance.
Manhole Cover/Lid
Cover/lid not in place
Cover/lid is missing or only partially in place.
Cover/lid protects opening to
Any open structure requires urgent
structure.
maintenance.
Locking mechanism
Mechanism cannot be opened by one
Mechanism opens with proper tools.
Not Working
maintenance person with proper tools. Bolts
cannot be seated. Self-locking cover/lid does not
work.
Cover/lid difficult to
One maintenance person cannot remove
Cover/lid can be removed and
Remove
cover/lid after applying 80 lbs. of lift.
reinstalled by one maintenance
person.
4/24/2016 2016 Surface Water Design Manual — Appendix A
A-10
APPENDIX A MAINTENANCE REQUIREMENTS FOR FLOW CONTROL, CONVEYANCE, AND WQ FACILITIES
NO. 6 - CONVEYANCE PIPES AND DITCHES
Maintenance
Defect or Problem
Conditions When Maintenance is Needed
Results Expected When
Component
Maintenance is Performed
Pipes
Sediment & debris
Accumulated sediment or debris that exceeds
Water flows freely through pipes.
accumulation
20% of the diameter of the pipe.
Vegetation/roots
Vegetation/roots that reduce free movement of
Water flows freely through pipes.
water through pipes.
Contaminants and
Any evidence of contaminants or pollution such
Materials removed and disposed of
pollution
as oil, gasoline, concrete slurries or paint.
according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Damage to protective
Protective coating is damaged; rust or corrosion
Pipe repaired or replaced.
coating or corrosion
is weakening the structural integrity of any part of
pipe.
Damaged
Any dent that decreases the cross section area
Pipe repaired or replaced.
of pipe by more than 20% or is determined to
have weakened structural integrity of the pipe.
Ditches
Trash and debris
Trash and debris exceeds 1 cubic foot per 1,000
Trash and debris cleared from
square feet of ditch and slopes.
ditches.
Sediment
Accumulated sediment that exceeds 20% of the
Ditch cleaned/flushed of all
accumulation
design depth.
sediment and debris so that it
matches design.
Noxious weeds
Any noxious or nuisance vegetation which may
Noxious and nuisance vegetation
constitute a hazard to County personnel or the
removed according to applicable
public.
regulations. No danger of noxious
vegetation where County personnel
or the public might normally be.
Contaminants and
Any evidence of contaminants or pollution such
Materials removed and disposed of
pollution
as oil, gasoline, concrete slurries or paint.
according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Vegetation
Vegetation that reduces free movement of water
Water flows freely through ditches.
through ditches.
Erosion damage to
Any erosion observed on a ditch slope.
Slopes are not eroding.
slopes
Rock lining out of
One layer or less of rock exists above native soil
Replace rocks to design standards.
place or missing (If
area 5 square feet or more, any exposed native
Applicable)
soil.
2016 Surface Water Design Manual — Appendix A 4/24/2016
A-11
Appendix A: Reference Maps
A PORTION OF NW 1/4 OF SECTION 15 AND THE NE 1/4 OF SECTION 16, T. 21 N., R. 4 E., W.M. KING COUNTY, WASHINGTON
SITE DATA:
SITE ADDRESS
PARCEL NUMBER
SITE AREA:
PROJECT AREA:
ZONING:
TO BE DETERMINED
FEDERAL WAY. WA 98003
762240-0015
500,223 S.F. (11.48 AC.)
69,866 S.F. (1.60 AC.)
CITY CENTER CORE (CC—C)
PROJECT CONTACTS:
CONSTRUCTION PLANS
for
THE COMMONS AT FEDERAL WAY
CIVIL ENGINEER / PLANNER / SURVEYOR LANDSCAPE ARCHITECT
ESM CONSULTING ENGINEERS, LLC URBAN ARENA
33400 8TH AVE S SUITE #205 11300 SORRENTO VALLEY ROAD SUITE #230
FEDERAL WAY, WA 98003 SAN DIEGO, CA 92121
CONTACT: LAURA BARTENHAGEN, PE, LEED AP CONTACT: BRICE CIABATTI
PHONE: 206-838-61 13 PHONE: 858-625-01 12
GEOTECHNICAL ENGINEER
GEOTEST, INC
20527 67TH AVE NE
ARLINGTON, WA 98223
CONTACT: KURT PARKER, LEG
PHONE: 360-435-1 141
ARCHITECT
MCG ARCHITECTURE
250 SUTTER STREET SUITE 500
SAN FRANCISCO, CA 94108
CONTACT: DAVID BLAIR
PHONE: 415-974-6002
OWNER/ DEVELOPER
MERLONE GEIER PARTNERS
457 SW 148TH STREET SUITE #202
BURIEN, WA 98166
CONTACT: GLENN GOODMAN
PHONE: 206-439-2330 EXT. 526
DEVELOPMENT STANDARDS:
CC—C CITY CENTER CORE
USE:
MINIMUM LOT AREA:
MAXIMUM LOT COVERAGE:
MAXIMUM BUILDING HEIGHT:
BUILDING SETBACKS:
FRONT:
SIDE:
REAR:
REQUIRED PARKING SPACES:
0 =
>
U
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o m
n
00
i�
0
0
/
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En
RETAIL AND ENTERTAIMENT
NONE
NONE
70' (95' WITH PROVISIONS IN FWRC19.115.110)
0'
0'
0'
RETAIL — 1 PER 300 SF
RESTAURANT — 1 PER 100 SF
Vicinity Map
NOT TO SCALE n
Q
SITE
S 320TH ST
S 324TH ST %
�� CELEBRATION O
W 330T T PARK
co
V) Q
Cl) U per, North Q �O
Q Lake
°- 5 _
a� 00
S 336TH ST
PANTHE LAKE N
Q S 340TH ST N 18
S 342ND ST
PANTHER LAKE PARK rn S 343RD
S 344TH ST
161 C
S 348TH ST
= HYLEBOS STATE PARK Ld C
:j
Cf) LAKE GENEVA
Q BROOK LAKE 99 LAKE KILARNEY S 352ND ST
Cn
0
S 356TH ST I \
- PAD
prepared for
M RLONE G I R PARTNERS
457 SW 148TH STREET SUITE #202
BURIEN, WA 98166
(206) 439-2330 EXT. 526
CONTACT: GLENN GOODMAN
prepared by
33400 8th Ave S, Suite 205
FEDERAL WAY, WA 98003
Phone: (253) 838-61 13
of WASH/;
a
%m7/2021
DATE: 12/ 17/2021
ESM JOB NO. 2013-001-018
SHEET 1 OF 11
Sheet Index
City of Federal Way
UTILITY PROVIDERS:
SEWER:
LAKEHAVEN UTILITY DISTRICT
WATER:
LAKEHAVEN UTILITY DISTRICT
POWER:
PUGET SOUND ENERGY
GAS:
PUGET SOUND ENERGY
TELEPHONE:
CENTURY LINK
CABLE:
COMCAST
FIRE:
FEDERAL WAY DISTRICT
#39
SCHOOL:
FEDERAL WAY SCHOOL
DISTRICT #210
PARKING
REGULAR STALLS =
7
COMPACT STALLS =
0
ADA PARKING
STALLS =
2
TOTAL
=
9
SHEET NO.
DRAWING NO.
DESCRIPTION
1
CV-01
COVER SHEET
2
EX-01
EXISTING CONDITIONS & DEMOLITION PLAN
3
LG-01
LEGEND
4
ST-01
HORIZONTAL CONTROL & SITE PLAN
5
GR-01
T.E.S.C. & GRADING PLAN
6
GR-02
T.E.S.C. & GRADING DETAILS
7
UT-01
COMPOSITE UTILITY PLAN
8
SD-01
PARKING & STORM DRAINAGE PLAN
9-10
DT-01 —
DT-02
DETAILS
11
DT-03
CURB RAMP DETAILS
Know what's below.
Call before you dig.
I
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A PORTION OF NW 1/4 OF SECTION 15 AND THE NE 1/4 OF SECTION 16, T. 21 N., R. 4 E., W.M. KING COUNTY, WASHINGTON
KEY NOTES
SEE SHEET DT-0 FOR DETAILS.
O - CEMENT CONCRETE SIDEWALK W/ INTEGRAL CURB
O - EXTRUDED CEMENT CONCRETE CURB
O - STANDARD PAVEMENT SECTION
O - CEMENT CONCRETE SIDEWALK
O - HEAVY DUTY ASPHALT PAVEMENT SECTION
a a
PACIFIC HWY S
(PUBLIC RIGHT OF WAY)
n
LEGEND
PROPOSED STORM DRAINAGE SCALE: 1 = 20'
PROPOSED SANITARY SEWER
PROPOSED WATER 20 10 0 20 40
- - -SD— - EXISTING STORM DRAINAGE CONTOUR INTERVAL = 1'
- - -ss- - - EXISTING SANITARY SEWER
- - -w- - EXISTING WATER
- - EXISTING GAS
LIGHT ASPHALT PAVING
CONCRETE PAVING
ASPHALT ENHANCED
PEDESTRIAN CROSSING
SEE SHEET DT-03
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DESCRIPTION/DATE
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2013-001 -018
D WG. NAME:
ST-01
DESIGNED BY:
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DRAWN BY:
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CHECKED
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DATE:
12/17/2021
DATE OF
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ST-01
4 OF 11 SHEETS
LEGEND
------------------------ DAYLIGHT LINE
CLEARING LIMITS
FILTER FABRIC FENCE
INTERCEPTOR DITCH
O■ INLET PROTECTION
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DETAIL A
SCALE: 1 "=10'
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CONSTRUCTION SEQUENCE
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. IDENTIFY AND PROTECT TREES TO BE RETAINED.
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.
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KEY NOTES
OEXISTING LANDSCAPE CURB, GUTTER AND SIDEWALK TO
1 REMAIN. PROTECT FROM DAMAGE OR DISTURBANCE.
ALONG PROPERTY FRONTAGE, CONTRACTOR SHALL
REPLACE SIDEWALK PANELS THAT DO NOT COMPLY
WITH ADA STANDARDS.
OITEM TO REMAIN. PROTECT FROM DAMAGE
OR DISTURBANCE.
EARTHWORK QUANTITIES
PAD I
CUT: 10 CY
FILL: 1,080 CY
NET: 1,070 CY (FILL)
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2013-001-018
DWG. NAME: GR-01
DESIGNED BY:
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DRAWN BY:
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CHECKED
BY:
DATE:
12/17/2021
DATE OF
PRINT:
GR-01
5 OF 11 SHEETS
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A PORTION OF NW 1/4 OF SECTION 15 AND THE NE 1/4 OF SECTION 16, T. 21 N., R. 4 E., W.M. KING COUNTY, WASHINGTON
KEY NOTES
SEE SHEET DT-0 FOR DETAILS.
O - CEMENT CONCRETE SIDEWALK W/ INTEGRAL CURB
O - EXTRUDED CEMENT CONCRETE CURB
O - STANDARD PAVEMENT SECTION
O - CEMENT CONCRETE SIDEWALK
O - HEAVY DUTY ASPHALT PAVEMENT SECTION
1. SEE SHEET DT-01 THRU DT-03 FOR DETAILS.
2. COORDINATE S.D.C.O. INVERTS ELEVATIONS WITH
BUILDING MECHANICAL CONTRACTOR.
3. ALL DIMENSION AND RADII ARE TO THE FLOW LINE OF
THE CURB & GUTTER OR THE BUILDING FOUNDATION.
LEGEND
LIGHT ASPHALT PAVING
CONCRETE PAVING
ASPHALT ENHANCED
PEDESTRIAN CROSSING
— — FOOTING DRAIN
--------------------- ROOF DRAIN
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2013-001-018
DWG. NAME: SD-01
DESIGNED BY:
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BA
CHECKED
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DATE:
12/17/2021
DATE OF
PRINT:
SD-01
8 OF 11 SHEETS
03
A PORTION OF THE NW 1/4 OF SECTION 16, TWP. 21 N., RGE. 4 E., W.M.
75
-S. 320TH STREET ------- ---- -
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S. 324TH STREET_--_ =--=---- _ —
SCALE: 1" = 60'
CONTOUR INTERVAL = 1'
HOR. DATUM: CITY OF FEDERAL WAY
VERT. DATUM: KCAS=NGVD-29
60 30 0 60 120
LEGEND
�— CATCH BASIN TYPE 1
W— — EXISTING WATER
------W ---- EXISTING 60" WATER
— — S — — EXISTING SEWER
D EXISTING STORM
Q ----- G------ EXISTING GAS
- P EXISTING POWER
- - - - - - - - - SAWCUT
ril NOTE:
Ld 1. THE EXISTING FEATURES SHOWN ON THIS PLAN WERE
= TAKEN FROM PLANS PROVIDED TO E.S.M. LLC BY OTHERS.
(n E.S.M. LLC ASSUMES NO LIABILITY FOR THE ACCURACY OF
THAT INFORMATION AND HAS BASED THEIR DESIGN ON THAT
Ltd INFORMATION.
W 2. CONTRACTOR TO VERIFY EXISTING UTILITIES LOCATION, INVERT,
0 SIZE, AND TYPE PRIOR TO CONSTRUCTION AND NOTIFY ENGINEER
OF ANY DISCREPANCIES.
L LJ
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J STEADFAST COMPANIES
18100 VON KARMAN, SUITE 500
= IRVINE, CA 92612
QBASIS OF BEARING
HORIZONTAL DATUM BASED ON CITY OF FEDERAL WAY CONTROL.
STATE PLANE COORDINATES NORTH ZONE NAD-83 (91).
BENCHMARKS
VERTICAL DATUM BASED ON CITY OF FEDERAL WAY CONTROL
MONUMENT FW144. TOP OF MONUMENT INSIDE CASE LOCATED
IN THE CENTER LINE OF SOUTH 320th STREET, 0.20 MILES
EAST OF I-5 OVERPASS. ELEVATION = 462.93 (ft) NGVD-29.
T.B.M.
TOP N.E. BOLT OF SIGNAL POLE BASE LOCATED IN THE S.W.
CORNER OF 23rd AVE. SOUTH AND SOUTH 322nd STREET
ELEVATION = 412.21 (ft) NGVD-29.
AS -BUILT CERTIFICATION:
I HEREBY DECLARE TO THE BEST OF MY KNOWLEDGE
THAT THE INFORMATION SHOWN HEREON REFLECTS THE
AS -CONSTRUCTED CONDITIONS." THIS CERTIFICATION
IS BASED UPON WORK PREPARED IN ACCORDANCE WITH
GENERLLY PTPROFESSIONAL ENGINEERING
OA
AND/AJONAT KAR N, S. N0. 41959
DATE /� �! ,�
PERMIT NO. 13-100709-EN
C Y OF FEDERAL WAY
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APPROVAL DATE 111L It's
SIGNATURE
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DWG. NAME: AB-WO-02
DESIGNED BY: LGB
DRAWN BY: CJR
CHECKED BY:
DATE: 0 /13/2013
DATE OF
PRINT:
AB-WQ-02
2 OF 21 SHEETS
Appendix B: Developed Site Conditions
-S
A PORTION OF NW 1/4 OF SECTION 15 AND THE NE 1/4 OF SECTION 16, T. 21 N., R. 4 E., W.M. KING COUNTY, WASHINGTON
PACIFIC HWY S
(PUBLIC RIGHT OF WAY)
I_/\ \1U, I\I IVI—TV T..JV
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LEGEND
sc PROPOSED STORM DRAINAGE
s PROPOSED 8" 0 SANITARY SEWER
-W— PROPOSED 8"0 WATER
— — -SD— — EXISTING STORM DRAINAGE
— — -SS— — — EXISTING SANITARY SEWER SCALE: 1 " = 20'
— — —w— — — EXISTING WATER
20 10 0 20 40
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FREVISIONS
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2013-001-018
DWG. NAME:
UT-01
DESIGNED BY:
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DRAWN BY:
BA
CHECKED
BY:
DATE:
12/17/2021
DATE OF
PRINT:
UT-01
7 C:
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