17-101601 (2).,: R =r-PERMIT PPLICATION
CITY OF - PU V L N w�
Federal Way RECEIVED
I I S F- APR 0 7 2017
PERMIT NUMBER � � _ ` O I Go l _
T ri WAYA
SITE ADDRESS SUITE/UNIT #
PROJECT VALUATION ZONING ASSESSOR'S TAX/PARCEL #
$ 00 003�
TYPE OF PERMIT BUILDING J�_PLUMBING Y�_MECHANICAL ❑ DEMOLITION ❑ ENGINEERING ❑ FIRE PREVENTION
NAME OF PROJECT LL ffi6kl1x1:i `it>,GL+(�s-�`� LL C i�cN-� /ate � -7-
PROJECT DESCRIPTION
Detailed description of work to e g"`"
be included on this permit only
- - - --.. NAME
�-
PROPERTY OWNER MAILING ADDRESS C
CITY �PcW L. STATE ZIq Zr�
.PL'%a. � ` WA
CONTRACTOR
APPLICANT
PROJECT CONTACT
(The individual to receive and
respond to all correspondence
concerning this application)
PROJECT FINANCING
When value is $5,000 or more
(RCW I9.2ZO95)
NAME
MAILING ADDRESS
'2.I-4C1 t s i oqi - ok�.2
�kfyss �s � •t�
CITY
V_e�_�
WA STATE CONTRACTOR'S LICENSE #
402 $�� �3( Gard
NAME
c.,�_ l-c L
MAILING ADDRESS
CITY
NAME r
MAILING ADDRESS
L2_?-i,1,4 2-<
CITY
NAME N� �
MAILING ADDRESS, CITY, STATE, ZIP
5E
STATE ZIP
�.Jiq 9gC-3
EXPIRATION DATE
S iJ 11 / o g / I ,
i0-k- _J� 4
STATE
ZIP
: L
Ak --1-
STATE
vwa
ZIP
g80r 3
PRIMARY PHONE
Zc,(.=. _ 2!&- i- 3-4 2,8")
E-MAIL
�otL� •Jr"FiGI?i�ION �*k;YAU,s�I C�
PHONE
251,- 5 4- aZW 2-
E-MAIL
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FAX
FEDERAL WAY BUSINESS LICENSE #
PRIMARY PHONE
E-MAIL
FAX
PRIMARY PHONE
E-MAIL n
ce✓Ic%� E �O.Cit,%, c
FAX
- OWNER -FINANCED
PHONE
I certify under penalty of perjury that I am the property owner or authorized agent of the property owner. I certify that to the best
of my knowledge, the information submitted in support of this permit application is true and correct. I certify that I will comply with
all applicable City of Federal Way regulations pertaining to the work authorized by the issuance of a permit. I understand that the
issuance of this permit does not remove the owner's responsibility for compliance with local, state, or federal laws regulating
construction or environmental laws.
I further agree to hold harmless the City of Federal Way as to any claim (including costs, expenses, and attorneys' fees incurred in
the investigation and defense of such claim), which may be made by any person, including the undersigned, and filed against the city,
but only where such claim arises out of the reliance of the city, including its officers and employees, upon the accuracy of the
information supplied to the city apart of this application.
SIGNATURE: - DATE
PRINT NAME: 6 `J CDs — --
Bulletin #100 - February 22, 2016 Page 1 of 2 k:\Handouts\Permit Application
VALUE OF MECHANICAL WORK
MECHANICAL PERMIT
$
Indicate how mart of each Qjpe o
to be installed or relocated as art v this ro'ect. Do noxtudee;cisiin_QjidureStorernain.
AIR HANDLING UNITS
FANS
GAS PIPE OUTLETS
OTHER (Describe)
AIR CONDITIONER
FIREPLACE INSERTS
HOODS (c.--ig
BOILERS
I . FURNACES
HOT WATER TANKS (Gas)
COMPRESSORS
GAS LOG SETS
REFRIGERATION SYST
1 DUCTING
GAS PIPING
WOODSTOVES
VALUE OF PLUMBING WORK
PLUMBING PERMIT
� �
Indicate how nmqy of each (tipe o
ure to be installed or relocated as
art o this roj . Do not include exist' Ixtr4res to remain.
BATHTUBS (orTub/Sho—Combo)
LAVS (Hand Sinks)
TOILETS
WATER PIPING
DISHWASHERS
RAINWATER SYSTEMS
URINALS
OTHER (Describe)
DRAINS
_L SHOWERS
VACUUM BREAKERS
DRINKING FOUNTAINS
SINKS (%;then/utility)
WATER HEATERS (Electric)
HOSE BIBBS
_�
SUMPS ' Z WASHING MACHINES
TOTAL FIXTURES
GENERAL INFORMATION
CRITICAL AREAS ON PROPERTY? WATER PURVEYOR SEWER PURVEYOR VALUE OF EXISTING IMPROVEMENTS
y.e Ce W v+- L9 (A,� $
EXISTING/PREVIOOUUS USE LOT SIZE (In Squa a Feet) EXISTING FIRE SPRINKLER SYSTEM? PROPOSED FIRE SUPPRESSION SYSTEM?
v(,tw" %S --2 'E:� -)- ❑ Yes j' No ❑ Yes >!L,No
r
RESIDENTIAL -NEW OR ADDITION
AREA DESCRIPTION (in square feet)
EXISTING
PROPOSED
TOTAL
FOR OFFICE USE
BASEMENT
(t�
'zI)
FIRST FLOOR (or Mobile Home)
SECOND FLOOR
COVERED ENTRY
3 ��
DECK
GARAGE -16, CARPORT ❑
OTHER (describe)
Area Totals
MUSTlnG
�PROZ7,1
TOTAL
"ArEw �roxEs
olv r
ESTIMATED SELLING PRICE $ ��
#
OF BEDROOMS
COMMERCIAL — NEW/ADDITION
AREA DESCRIPTION Area in Occupancy Group(s)
Square Feet
NEW BUILDING
ADDITION
COMMERCIAL — REMODEL/TENANT IMPROVEMENTS
AREA DESCRIPTION Area in Occupancy Group(s)
Square Feet
TOTAL BUILDING
TENANT AREA ONLY
PROJECT AREA ONLY
Construction # of Additional Information
Tvne Stories
Construction # of Additional Information
TV TAe Stories
Bulletin #100 — February 22, 2016 Page 2 of 2 k:\Handouts\Permit Application
STORM DRAINAGE
SMALL SITE
TECHNICAL INFORMATION REPORT
For
New LL Management LLC
Located at
XXXX S 337' Place, Federal Way, WA 98001
PARCEL # 4420600035
FOR
LL Management LLC
PHONE: 206-861-3728
Date: April 6, 2016
Prepared by:
Anstey Engineering
CIVIL ENGINEERING/CONSULTING
8627 NE 1801h Street
Bothell, Washington 98011
Phone: (206) 303-7639
fax (425) 658-9203
e-mail: benanstey@ansteyengineering.com
RECEIVED
APR 0 Z 2017
CITYCOMMUNITY DEVELGPMEiVT
LL MANAGEMENT LLC TIR
Pagel of 12 AE 17-28
LL MANAGEMENT LLC Residence
Table of Contents Technical Information Report (TIR)
Project Overview 3
Conditions and Requirements Summary
1. Discharge at the Natural Location 4
2.Offsite Analysis
4
Task 1: Study Area Definition and Maps
4
Task 2: Resource Review
Task 3: Field Inspection
Task 4:Drainage System Description and Problem Descriptions
Task S:Mitigation of Existing or Potential Problems
6
3.Flow Control and Water Quality Facility Analysis and Design
Part A: Existing Site Hydrology
7
Part B: Developed Site Hydrology
6
Part C: Performance Standards
6
Part D: Flow Control System
6
Part E: Water Quality System
6
4. Conveyance System Analysis and Design
7
5. Erosion Control
Part A:ESC Plan Analysis and Design
7
Part B:SWPPS Plan Design
7
6. Maintenance and Operations
7
7.Financial Guarantee
7
8.Water Quality
7
9.Flow Control BMPs
7
Special Requirements
8
Appendix
Imap
9
Figure C.2.1.1) DISPERSAL TRENCH
10
Maintenance Instructions for Basic Dispersion and Pervious Pvmt
11
LL MANAGEMENT LLC TIR
Paget of 12 AE 17-28
Project Overview
This storm drainage technical information report has been prepared to address the 2016 King
County and City of Federal Way site development and storm drainage requirements for the
proposed single family residence located in Federal Way, WA on tax parcel number 4420600035
at xxxx South 337t' Place, Federal Way, WA 98001 in King County, WA. in the NE % Section
21, Township 21, Range 4 East, WM.
The Legal Description is: LOUISES NORTH LAKE TRS LOT # 7
The 15,757 SF undeveloped, site is located on the north side of S 337th Place and South of
North Lake. The project consists of the creation of a new 2,244.4sf single family residence and
garage (roof area) with a 747 SF driveway. The total new impervious surface area will be:
2,991.4 SF or 19% of the site. The new house will be set near S 337th Place to maximize open
space and to provide maximum dispersal over the lot before any water would reach the lake. As
less than 5,000sf (2991.4 SF) of impervious area is created and the project is in the Urban
Growth Area the project falls under Small Lot Simplified Drainage Review per CA of the 2016
KDSWDM. A site location and sensitive areas I -map can be seen in the Appendix. This map
shows that the site is not located near sensitive areas, except for the lake. The runoff from the
site will travel north to North Lake. Drainage Basin = Hylebos Creek.
Watershed: Puyallup River
Per the 2016 King County Surface Water Design Manual CA this lot meets SIMPLIFIED
DRAINGE REVIEW STANDARDS as less than 5,000sf (2991.4SF) of impervious area is created and
it is in an Urban Area with Till Soil and is a small Lot less than 22,000sf. A roof downspout basic
dispersion trench per Figure C.2.1.D will be used using FULL dispersion over a 100 foot minimum
flow path.
FULL dispersion is practical as there is a 100' foot + Natural vegetated flow path
available on the lot.
Full Infiltration cannot be used as the Till soil on the site is not suitable for Stormwater
infiltration. Per the Sheet 15 of the King County SCS Soil map the soils are Alderwood, AgB Till
Soils. This was verified by the Anstey Engineering field investigation on 3-19-2017 which found
till soil, and groundwater at 12 inches below the surface.
2. Conditions and Requirements Summary
The nine core requirements in Section 1.2 will be addressed in this TIR along with the 5
special requirements:
LL MANAGEMENT LLC TIR
Page3 of 12 AE 17-28
CORE REQUIREMENT#1 DISCHARGE AT THE NATURAL LOCATION
The flows on this site will be collected and routed to a dispersion trench on the north
side of the lot. The flow will continue to flow to the natural downhill flow path to the north to
North Lake.
CORE REQUIREMENT #2 OFFSITE ANALYSIS
This is a sub -urban area and the properties are large and lightly developed. There are no
significant on site flows onto this property. Runoff from the site sheet flows to the north. There
is no defined downstream drainage course. No significant flows enter the property or leave the
property.
Task 1. Study Area Definition and Maps
The properties to the west, and east of this site are vacant with large grass and forested
areas, and do not discharge any significant amount of runoff onto this site. South 337th Place to
the South does not drain much onto the site. No other significant flows enter the site. North
Lake is to the North of the Site
No concentrated surface water runoff will be discharged off -site. There are no
downstream effects anticipated from the proposed development. The downstream flowpath of
stormwater runoff during very large storms is to flow North to North Lake. A site map and
topographical map with downstream flow path can be found in the Appendix on page 11.
Task 2: Resource Review
Using the King County iMap interactive tool, it was found that there are no immediate
critical areas upstream or downstream of the property. The iMap also confirmed that there are
no mitigating rivers, floodplain issues, there are no adopted basin plans.
Task 3: Field Inspection
There are no reported problems to be investigated. The amount of space and soil types
present on the property clearly support the flow control BMPs being implemented. There will
not be any destruction of aquatic habitat on -site or downstream. The Site was visited on March
19, 2017 and a 1/4 mile downstream investigation was made. There are no defined drainage
systems in the area.
From SCS Soul Map Sheet 15, Soil is AgB Till and Anstey Engineering on -site investigation
LL MANAGEMENT LLC TIR
Page4 of 12 AE 17-28
Task 4: Drainage System Description and Problem Descriptions
For drainage control basic dispersion and pervious pavement will be implemented to
comply with basic flow control of Core Requirement #3. In order to do that, the site will comply
with CA flow control standard for Small Sites to match the existing site conditions using Full
dispersion for the roof and pervious pavement for the driveway. These BMPs are the best
available for the site as other BMPs have been found to be impractical. Runoff from the roof
downspouts will be collected and then dispersed through a 32 foot long dispersal trench with
notchboard per C.2.4.13 on the north side of the site.
Task 5: Mitigation of Existing or Potential Problems
There are no existing or potential drainage problems and water quality problems.
CORE REQUIREMENT #3 FLOW CONTROL.
Part A: Existing Site Hydrology
The parcel is vacant, and is gently sloped with slopes of about 2%+/- sloping down to the
north. The storm water runoff from the site currently disperses across the site. There does not
appear to be any significant surface flow. Any runoff from a large storm event will drain to the
north to North Lake. The site does not receive any significant off -site flows from the adjacent
properties.
Part B: Developed Site Hydrology
When the new house and driveway are constructed it can use pervious pavement and
Full dispersion with a dispersion trench and notch board per Figure C.2.1.D. House roof
downspouts will drain to the dispersion trench. The Driveway and walk will be made of pervious
pavement per C.2.7.
Part C: Performance Standards
Flow control BMPs are used on this site to control Stormwater to the extent feasible.
Basic Dispersion will be used. This is a single family residence and as such does not pose any
significant threat for pollution. No pollution generating activities are planned. This is not a 'High
Use Site'. It is a single family residence. Per C-1 the site has less than S,OOOsf of new
impervious surface (747sf) and the new Pervious surface is 8,197.6 sf which is less than the
14,941-(2991.4sf Imp x 1.88) = 9317.17sf allowed so it meets the pervious area standard.
BMP Analysis:
Full Dispersion can be used due to availability of a 100 foot+ natural Vegetated flow path
available on -site.
Full Infiltration cannot be used as the Alderwood AgB Till soils are not suitable for full
infiltration. Groundwater was found at 12 inches below the surface.
LL MANAGEMENT LLC TIR
Pages of 12 AE 17-28
The Site does meet the requirements for the Restricted Footprint. The 2,244sf house and 747sf
pavements totaling 2,991.4sf is less than the 4,OOOsf which could be installed for a credit of
1,008.6sf.
The site does meet the requirements for the Native Growth Protection Easement and a 4,568sf
Native Growth Protection Easement will be created on the north 100 of the lot to provide the
100 foot Native Vegetated Flow Path to the Lake.
Raingardens and Limited Infiltration will not work due to lack of space and no outlet.
Basic Dispersion will work but Full Dispersion is the preferred method of flow control.
A perforated Pipe connection cannot be used as there is no available drainage connection.
Pervious pavement will be used for the driveway.
Part D: Flow Control System
The Erosion and Sediment Control Plans along with the Site Plans include the locations
of the flow control systems. In addition, cross -sections of the flow control BMPs can be found in
the Appendix.
DEVELOPED GROUND COVER AREA TABLE JOTAL SITE = 9,OOOsf = 0.2 ACRES
LAWN OR DISTURBED AREA (not counting
imp)
IMPERVIOUS AREA HOUSE AND DRIVE
Part E: Water Quality System
0.188 ACRES (8,197.65 SF)
2991.4sf = 0.0686 ACRES
Downturned Elbows in the Catch Basins will provide additional protection.
Flow control BMPs are used on this site to control stormwater. Pervious Pavement and
basic Dispersion will be used. Total Impervious area = 2,991.4 SF
1 Roof to dispersion trench 2,244.4sf Use 32 foot trench
@ 10LF TRENCH PER 700 SF ROOF
2 1 Driveway
Total Impervious
747sf Use Pery Pvmt
1 2,991.4sf
LL MANAGEMENT LLC TIR
Page6 of 12 AE 17-28
CORE REQUIREMENT #4 CONVEYANCE SYSTEM
No conveyance piping is needed on this project
Core Requirement #5 EROSION AND SEDIMENT CONTROL
Temporary ESC measures will be required as there will be disturbance of the soil to
construct the driveway, and house. A silt fence around the construction area and construction
entrance should be provided at a minimum.
Part A: ESC Plan Analysis and Design
In compliance with Core Requirement #5, Temporary ESC measures will be required as
there will be disturbance of the soil to construct the driveway and house. All of the flows from
the driveway and house will flow onto the lot so no adjacent properties will be affected. A silt
fence around the downslope side of the construction area and construction entrance should be
provided at a minimum. No special requirements are needed as no runoff will enter any
drainage channel or other property.
Part B: SWPPS Plan Design
There are very little to no pollution -generating activities anticipated for this project. All
construction BMPs will be followed including updates or revisions that may take place in the
future.
CORE REQUIREMENT #6 MAINTENANCE AND OPERATION
The dispersion trench and pervious pavement will require little maintenance.
See instructions in Appendix
CORE REQUIREMENT #7 FINANCIAL GUARANTEES AND LIABILITY
There is no Financial Guarantee or Liability associated with this project. The property
owner will be responsible to insure that the project is constructed to the approved plans and
that the drainage does not cause any problems.
CORE REQUIREMENT #8 WATER QUALITY
There is less than 5000sf of Pollution generating surface so no water quality treatment is
required.
CORE REQUIREMENT #9 FLOW CONTROL BMP'S
A Dispersion trench per C.2.1.1) will be used to control Stormwater. Other BMP's were
determined to be infeasible in Core Requirement #3 flow control
All small lot BMP requirements were followed per Section C.2.4 of the 2016 KCSWDM. These
were accomplished by using Full dispersion per Figure C.2.1.1) and pervious pavement per C.7
LL MANAGEMENT LLC TIR
Pagel of 12 AE 17-28
SPECIAL REQUIREMENT #1 OTHER ADOPTED AREA -SPECIFIC REQUIREMENTS
There are no known area specific requirements for this site.
SPECIAL REQUIREMENT #2 FLOOD HAZARD AREA DELINEATION
This site is not located in a Flood Hazard Zone
SPECIAL REQUIREMENT #3 FLOOD PROTECTION FACILITIES
There are no Flood Protection Facilities associated with this project
SPECIAL REQUIREMENT #4 SOURCE CONTROLS
This is a single family residence and as such does not pose any significant threat for
pollution. No Pollution generating activities are planned.
SPECIAL REQUIREMENT #5 OIL CONTROL
This is not a High Use Site. It is a single family residence. The minimal amount of oil drips
on the driveway will be treated by the dispersion over the grassed lawn.
LL MANAGEMENT LLC TIR
Page8 of 12 AE 17-28
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LL MANAGEMENT LLC TIR
Page9 of 12 AE 17-28
❑ TEXT OF INSTRUCTIONS
Your property contains a stormwater management flow control BMP (best management practice) called '"full
dispersion." Full dispersion is a strategy for minimizing the area disturbed by development (.e., impervious
or non-native pervious surfaces, such as concrete areas, roofs, and lawns) relative to native vegetated
areas (e.g., forested surface) together with the application of dispersion techniques that utilize the natural
capacity of the native vegetated areas to mitigate the stormwater runoff quantity and quality impacts of the
developed surfaces. This flow control BMP has two primary components that must be maintained: (1) the
devices that disperse runoff from the developed surfaces and (2) the native vegetated area.
Dispersion Devices
The dispersion devices used on your property include the following as indicated on the flow control BMP
site plan: ❑ splash blocks, ❑ rock pads, ❑ gravel filled trenches, ❑ sheet flow. The size, placement,
composition, and downstream flowpaths of these devices as depicted by the flow control BMP site plan and
design details must be maintained and may not be changed without written approval either from the King
County Water and Land Resources Division orthrough a future development permit from King County.
Dispersion devices must be inspected annually and after major storm events to identify and repair any
physical defects. When native soil is exposed or erosion channels are present, the sources of the erosion
or concentrated flow need to be identified and mitigated. Bare spots should be re -vegetated with native
4l24R016 2016 Surface Wawr Design Manual —Appendix C
C-46
LL MANAGEMENT LLC TIR
Pagel of 12 AE 17-28
SEC PION C 2 FLOW CONTROL BMPs
11 FIGURE C.2.1.D 50-FOOT DISPERSION TRENCH WITH NOTCHED BOARD 11
1'- 0
MIN.
A
—PIPE O D
11-0
MIN
50' I
LLL---
■
NOTCHED
GRADE BOARD
PLAN
2" X 2" NOTCHES
NTS
18"OC'
GALVANIZED —
BOLTS
2"x12"
Z GRADE
BOARD
Nr„p
4" X 4"
SUPPORT
POST
6"
MIN
4!24,2016
11-0
MIN
END CAP OR PLUG
FLOW TO SECOND
DISPERSALTRENCH
CLEAN OUT WYE FROM PIPE
IF NECESSARY
MIN 6" PERFORATED PIPE
LAID FLAT/LEVEL
TYPE I CB
TYPE I CB W/SOLID
WISOLID
COVER (LOCKING)
COVER
A
INFLUENT PIPE (MAX DESIGN
FLOW <0 5 CFS PER TRENCH)
CLEAN OUT WYE FROM PIPE
FLOW TO OTHER BRANCHING
CB'S AS NECESSARY
�181, OC-�
42"1�
PIPE O D
20°b MAX, 2" GRADE BOARD
MIN ' SEE NOTE 5 NOTCHES'
'FOR WATER QUALITY FACILITIES,
SEE SECTION 6 2 6 1, OPTION A FOR
NOTCH DIMENSIONS AND SPACING
FILTER FABRIC TRENCH LINER
olo
CLEAN (c5% FINES)
1"WASHED ROCK
MIN 6" PERFORATED PIPE LAID FLAT
NOTES:
0.
1 THIS TRENCH SHALL M CONSTR UCTED TO
PREVENT POINT DISCHARGE AND/OR EROSION
2 TRENCHES MAY BE PLACED NO CLOSER THAN
50 FEET TO ONE ANOTHER (100 FEET ALONG
FLOWLINE)
3 TRENCH AND GRADE BOARD MUST BE LEVEL
ALIGN TO FOLLOW CONTOURS OF SITE
SECTION A -A
4 SUPPORT POST SPACING AS REQUIRED BY SOIL
NTS
CONDITIONS TO ENSURE GRADE BOARD
REMANS LEVEL
5 15% MAX UNLESS OTHERWISE EVALUATED AND
APPROVED, SEE SECTION C 2 1 1
C-42
'_U 16 SUdace Watu Dc m Munual — AppenJia �
LL MANAGEMENT LLC TIR
Pagel of 12 AE 17-28
❑ TEXT OF INSTRUCTIONS FOR NON -VEGETATED PERMEABLE PAVEMENT
Your property contains a stormwater management flow control BMP (best management practice) called
"permeable pavement," which was installed to minimize the stormwater quantity and quality impacts of
some or all of the paved surfaces on your property. Permeable pavements reduce the amount of rainfall
that becomes runoff by allowing water to seep through the pavement into a free -draining gravel or sand
bed, where it can be infiltrated into the ground.
The type(s) of permeable pavement used on your property is: 0 porous concrete, 0 porous asphaltic
concrete, ❑ permeable pavers, 0 modular grid pavement.
The area covered by permeable pavement as depicted by the flow control BMP site plan and design details
must be maintained as permeable pavement and may not be changed without written approval either from
the King County Water and Land Resources Division orthrough a future development permit from King
County
Permeable pavements must be inspected after one major storm each year to make sure it is working
properly. Prolonged ponding or standing water on the pavement surface is a sign that the system is
defective and may need to be replaced. If this occurs, contact the pavement installer orthe King County
Water and Land Resources Division for further instructions. A typical permeable pavement system has a
life expectancy of approximately 25-years. To help extend the useful life of the system, the surface of the
permeable pavement should be kept clean and free of leaves, debris, and sediment through regular
sweeping or vacuum sweeping. The owner is responsible for the repair of all ruts, deformation, and/or
broken paving units
LL MANAGEMENT LLC TIR
Pagel of 12 AE 17-28
4 UTY OF
Federal Way
April 27, 2017
LL MANAGEMENT LLC
Nazary Ivanchuk
24913 104" Ave SE
Kent, WA 98030
RE: Permit #17-101601-00-SF;
L L MANAGEMENT LLC, S 337`h Street, Federal Way
Dear Mr. Ivanchuk:
CITY HALL
33325 8th Avenue South
Federal Way, WA 98003-6325
(253) 835-7000
www.cityoffederalway.com
Jim Ferrell, Mayor
The Public Works Department has reviewed the drainage and site plans for the residence proposed on S. 337th
Street. The following items must be completed before a building permit can be issued:
Street Frontage:
1. As outlined in Federal Way Revised Code Section 19.135.030, the applicant is required to build
improvements along the property frontage on S 337th Street for a type `W' street, which requires 24' of
pavement, 4' planter strip, and 5' sidewalk within a 52' right-of-way. A right-of-way modification request
may be submitted to reduce or eliminate this requirement. Please see the enclosed information.
2. A right-of-way permit will be required for the driveway connection to the public street. Please contact the
permit desk at 253-835-2725 for additional information.
Storm Drainage:
Please refer to the 2016 King County Surface Water Design Manual (KCSWDM), Appendix C, for storm water
design requirements and options. The following items must be changed and/or added:
For the dispersion trench, show setbacks from the building and property lines. Dispersion trenches must be
a minimum of 10 feet from any building and 5 feet from property lines.
Orange construction fence (or orange silt fence) must be provided along clearing limits.
Provide a detail of the pervious concrete.
Please submit three revised drainage and erosion control plans for further review. If you have any questions, please
contact me at (253) 835-2732 or at ann.dower@cityoffederalway.com.
Sincerely,
G
Ann M. Dower
Senior Engineering Plans Reviewer
AD:mt
enc: Right -of -Way Improvement Modification Request
cc: Cole Elliott, P.E.; Development Services Manager
Becky Chapin, Associate Planner
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17-101601-00-SF
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