BLD20160695_ENG comments 1.pdf
CITY OF EDMONDS
PLAN REVIEW COMMENTS
ENGINEERING DIVISION
(425) 771-0220
City Website: www.edmondswa.gov
DATE:July 22, 2016
TO:Alexandra Immel
Alexandra@alexandraimmeldesign.com
FROM:Jennifer Lambert, Engineering Technician
Jennifer.lambert@edmondswa.gov
RE:Application #: BLD20160695
Project: Schuler -Addition
Project Address: 932 Alder St
During review of the above noted application, it was found that the following information,
corrections,or clarifications are needed. Reviews by other divisions, such as Planning, Building,or
Fire may result in additional comments. Please redline plans or submit three (3) sets of revised
plans/documents with a written response to each of the items below to a permit coordinator.
nd
floor of City Hall.
Resubmittals can be made at the Development Services Department on the 2
Permit Center hours are M, T, Th & F from 8am-4:30pmand on Wednesdays from 8:30am-noon.
City of Edmonds handouts, standard details and development code can be referenced on the City
website.
COVER SHEET & SITE PLAN
1)The water and sewer are shown as the same line. Please revise the plans accordingly.
2)Show how the surface water runoff from the new impervious area will be collected and
discharged to the onsite stormwater management system.
Stormwater review commentsfromHerrera:
1.The Infiltration Sizing Summary (4/5/16) is missing the following information:
a.Project category (Category 1 Small Site Project)
b.Drainage basin/Watershed name
2.The Infiltration Sizing Summary (4/5/16) and Site Plan A1.0 (5/26/16) contain different
areas for the proposed walkway and total impervious area. Please update for consistency.
Infiltration Sizing Site Plan A1.0
Summary (4/5/16)(5/25/16)
Walkway129.61 sf142.9 sf
Total Impervious4014.23 sf4,027.52 sf
3.Please verify that the depth of aggregate for the existing infiltration trench is 3 feet. If the
existing infiltration trench has a 3’ aggregate depth, the existing trench was slightly
oversized and the proposed infiltration trench system length could be decreased slightly.
Based on the total impervious area (4,014.23 sf), the total infiltration trench system length
would need to be 72.25 LF (using a 1.8% sizing factor and a 3’ aggregate depth). The
additional infiltration trench length needed would be 12.25 LF, instead of the proposed 21.16
LF.
4.The Section II calculations include a typo (2828.55 sf should be 2838.55 sf); however, the
calculated result (1,176 sf) is based on the correct value of 2838.55 sf.
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