Edmonds Way-665_bld20080635_Anderson Office_storm_2.pdf
DATE: October 23, 2008
TO: File
FROM: Jerry Shuster, P.E., Stormwater Engineering Program Manager
RE: Application #: bld20080635
Project: Andersen Office Building
Project Address: 665 Edmonds Way
During review of the above noted application, it was found that the following information,
corrections, or clarifications are needed.
Stormwater Review 1 September 25, 2008
Items reviewed:
Drainage report dated June 10, 2008
·
Plan sheets C1-C3
·
Stormwater Review 2 October 23, 2008, 2008
Items reviewed:
Drainage report dated June 10, 2008, revised October 3, 20008
·
Plan sheets C1-C3 dated October 7, 2008
·
Stormwater Pollution Prevention Plan dated June 13, 2008.
·
- Most items in the comments dated September 25, 2008 have been addressed
10/23/2008
except for the following that were detailed in the Stormwater Management Review
Checklist:
Item 1(C) Page 2, last paragraph of the Drainage Report states that "The major
·
conveyance has a potential head water depth of 15.0 ft." Provide more explanation
of this statement and how backwater effects may affect project drainage, if any.
Item 3(A) Stormwater Pipe materials not specified on sheet C2
·
10/23/2008 - The bulleted items in page 3 of the Stormwater Pollution Prevention Plan need
to be updated to match the revived valued in the most recent Drainage Report
.
9/25/2008 - The major items regarding site drainage that require revising include: the
predevelopment site assumptions used in the model, the precipitation values used in the model,
and the piping plan for roof water. In the erosion and sediment control plan, several steps in the
construction sequence need to be added as well as relocation of the silt fence (or the limits of
clearing).
These items and minor revisions are detailed in the enclosed checklists.
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