SW_Review_Comments.pdf
City of Edmonds
TH
121 5 AVENUE NORTH
EDMONDS, WA 98020
(425) 771-0220
FAX(425) 771-0221
Website: www.ci.edmonds.wa.us
DEVELOPMENT SERVICES DEPARTMENT
Planning Building Engineering
Stormwater Review Comments
Permit : Date:
# BLD20070669 12/12/2007
Project Name/Address:
Edmonds Elementary School/1215 Olympic Ave, Edmonds
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Contact Person/Address/Fax:
Michael Spano/CG Engineering 250 4 Avenue S Suite
200, Edmonds, WA 98020/(425)778-5536
Reviewer: Division:
Blaine Chesterfield Engineering
During review of the subject submittal it was found that the following information,
corrections, or clarifications will need to be addressed:
1.
The drainage report only included detention calculations but did not include the
SBUH calculations for the 2-yr, 10-yr, and 100-yr, 24-hr storm event for current or
developed conditions. The Time of Concentration assumptions and calculations also
were not in the drainage report. In order to complete this review a complete set of
drainage calculations is needed including a list of all assumptions.
2.
The amount of drainage flowing into the detention pipe needs to more closely match
the facilities design capacity. In other words the detention facility is designed for
10900 sq ft of impervious area and should have the flows from approximately that
much area routed into it or the excess flows should bypass the system entirely.
Please resubmit three copies of the revised plans/documents to a Development
Services Coordinator. You may contact me at 425-771-0220 if you have specific
questions regarding these plan corrections.