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:
# PLN200500064-10686 11/21/2007
nd
Project Name/Address:
Short Plat/16208 72 Avenue W
nd
Contact Person/Address/Fax:
Phillip Lehn/16202 72 Ave W Edmonds, 98026/(425)
__
745-8949
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 engineer needs to clearly show that the existing drainage system is sized
to detain all (new and old post 1977) of the impervious area that will be
flowing into it.
2.
The Geotechnical report from AMEC, on April 27, 2005, indicates that there
is some cracks in the area and the proposed short plat will likely be considered
as an erosion hazard area. The report from AMEC also recommends that a
more site specific geotechnical engineering study be completed. Based upon
the findings and recommendations from the AMEC report the city needs a
more site specific geotechnical engineering study of the detention site that
addresses the stability of the slope and the existing detention pipes/pond. The
report needs to also consider if the additional drainage will have a negative
affect on the slope or detention system.
3.
A detention system maintenance and monitoring plan and schedule will need
to be developed for the use by the future homeowners.
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.