HomeMy WebLinkAboutC_Redline_Summary_of_Review_1_Comments_180510_v3D08-053B17005052V3REVISION Received: 05/10/2018 / aalexanderBUILDING DIVISIONAPPROVEDBUILDING DIVISIONTHIS SET OF
APPROVED
PLANS
MUST BE ON
THE
JOB
A
T ALLTIMES
DUR
ING CONS
TRUCT
ION
. TH
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ILDING
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IV
IS
ION
AND
RECEIPT
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ICATE OFOCCUPANCY.APPROVAL SHALL
NOT
BE CONSTRUED
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AUTHOR
ITY
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ISIONS OF
CODES
, ORDINANCES,OR OTHER REGULATIONS ENFORCED BY TH
IS
C
ITY.DATE: 05
/23/2018
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
B17005052D08-053V1 Lot 12B17005052RECEIVED10/27/2017aalexanderBUILDING DIVISION
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
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install perforated
pipe connection
prior to entering
system
Provide Declaration of Covenant for reduced impervious surface as well
as perforated pipe connection. these can be on shown on the same
declaration of covenant. also please include exhibit B for each BMP.
Reduced
Impervious
Surface
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>
>
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NOTICE: INSPECTOR VERIFY THAT
THE WINDOW AND DOOR CARRY A
MAXIMUM U-.28 TO SATISFY
ENERGY CODE.
Provide architectural
details around colors and
materials.
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ELECTRICAL PER FIELD
INSPECTOR
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B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
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B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
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Provide breakdown of
impervious surface as
follows:
Roof overhangs:
Driveway:
Sidewalks:
TOTAL:
Percentage of lot: %
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ION
B17005052D08-053V1 Lot 12RECEIVED10/27/2017aalexanderBUILDING DIVISION
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C.E.S. NW Inc.
P:\13040.0\!Filing - Chelan Creek PUD-16 Lot\Site Development\Drainage Assessment Lot 12.doc Page | 1
310 29th St. NE, Suite 101
Puyallup, WA 98372
Phone: (253) 848-4282
Fax: (253) 848-4278 Civil Engineering & Surveying
February 24, 2017
City of Renton
Planning Division
Development Engineering Section
1055 S. Grady Way
Renton, WA 98057
Project: Chelan Creek - Lot 12
Permit No.: Not Assigned
Subject: Drainage Assessment
Project Narrative
The project is located on Lot 12 of the Chelan Creek PUD (parent APN 102305-9106) with a lot
area of 5,507 sq.ft. The lot slopes from north to the south at approximately 1.0% to 5.0% and is
surrounded by residential parcels on all sides. The proposed onsite improvements include: 1,248
sq. ft. of driveway and concrete areas, 1,923 sq. ft. of roof area, and 2,336 sq. ft. of landscaped
areas.
A geotechnical engineering study has been prepared for Chelan Creek PUD by Associated Earth
Sciences, Inc., dated June 20, 2013. Exploration test pit EP-1 is proximity of Lot 12. The test
pit discovered approximately 1-foot of topsoil overlying 2-feet of Outwash, underlain by dense
Vashon till. Till soils are generally not suitable for infiltration. A copy of the geotechnical
engineering study is included with the building permit submittal.
Flow Control BMP Description
The Chelan Creek project utilizes the Flow Control BMP C2.9 Reduced Impervious Surface
Credit for the impervious surface on each lot. According to the approved Chelan Creek
Technical Information Report the plat is contained within a single drainage basin. This basin
accounts for a 65% impervious lot coverage, which is a 10% reduction of the maximum
allowable impervious area per the zoning (R-8). The proposed Lot 12 impervious lot coverage is
58%.
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P:\13040.0\!Filing - Chelan Creek PUD-16 Lot\Site Development\Drainage Assessment Lot 12.doc Page | 2
In addition, the Chelan Creek project utilizes the Flow Control BMP C2.4 Basic Dispersion for
the roof surface. A dispersion trench exists south of the lot which will disperse the roof area into
a 50-foot native vegetated flow path within the existing wetland/stream buffer.
The Chelan Creek PUD also provides combined water quality and detention pond for water
quality treatment and detention for the residential driveways and roadway elements associated
with the project.
Erosion and Sediment Control Measures
In order to prevent erosion and trap sediment within the project site, the following BMPs will be
used approximately as shown on Exhibit “C”:
Clearing limits will be marked by fencing. Clearing shall remain within this limits. The
contractor shall not clear any more area than what can be stabilized in a single day.
The driveway will be constructed and graveled immediately.
Cleared areas sheet flowing onto the proposed driveway shall be seeded and mulched.
Runoff shall not be allowed to concentrate and no water will be allowed to point discharge
onto any slopes. Silt fencing will be placed following the contours at the downslope limit of
clearing.
Mulch will be spread over all cleared areas of the site when they are being worked.
Stockpiles shall be covered or stabilized to prevent sediment laden runoff.
Operation and Maintenance Standards
The drainage facilities shall be maintained as per the maintenance covenants on file with the City
of Renton. A copy of the Chelan Creek PUD Operations and Maintenance Manual can be
provided upon request.
This Drainage Assessment and Erosion Control Plan for Chelan Creek PUD Lot 12 has been
prepared by me or under my supervision and meets the standard of care and expertise which is
usual and customary in this community of professional engineers. I understand that the City of
Renton does not and will not assume liability for the sufficiency, suitability or performance of
drainage facilities prepared by me.
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