pln20160054-Westgate Village Design Review-Memo of compliance.pdfDate:
To:
From:
Subject:
MEMORANDUM
March 31, 2017
Kernen Lien, Senior Planner
Jeanie McConnell, Engineering Program Manager
PLN20160054 —Design Review Westgate Mixed Use Zone
Westgate Village -10032 Edmonds Way
Engineering has reviewed the design review application for the Westgate Village property at
10032 Edmonds Way. The information provided is consistent with Title 18 Edmonds
Community Development Code & Engineering standards.
Compliance with Engineering codes and construction standards will be reviewed with the
building permit application for development of the site. Approval of the design review phase
of the project does not constitute approval of the improvements as shown on the submitted
plans.
A preliminary storm drainage report was submitted to the City to confirm project feasibility.
While project feasibility was confirmed, the following is being provided to assist in providing
a complete report with building permit submittal. If you have questions about these specific
comments, please contact Robert Edwards, City Stormwater Engineer —
robert.edwardsgedmondswa.gov or 425-771-0220, x 1323.
Background
This is classified as a Large Project because it involves 1 or more acres of land disturbing
activity.
Large Projects are subject to Small Site Minimum Requirements 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, and 11.
This is a stormwater feasibility review as part of a design review application.
Based on this submittal, the project appears feasible. Additional work will be necessary
for the final design.
Minimum Requirement #1— Preparation of Stormwater Site Plan
Comments:
1. There are several inconsistencies in the Storm Drain Report with respect to the
applicable storm water code, design manual, and associates requirements.
a. The project was submitted in 2016. As such, the project is subject to the
City of Edmonds 2010 stormwater code, 2010 stormwater supplement, and
City of Edmonds
the 2005 DOE stormwater manual. The Storm Drain Report references the
new code and manual.
b. WWHM modeling under the 2010 code is to use the Puget East rain gage,
not the Everett rain gage. This is accessible by selecting the WS-DOT data
on the project screen.
2. Several of the selected BMPs rely on infiltration. The geotechnical report did not
perform an infiltration evaluation. An infiltration evaluation needs to be performed
and infiltration rate(s) need to be determined for final design of these BMPs.
3. WWHM porosities should be 0.30 for rock strata in stormwater storage BMPs.
Minimum Requirement #2
— Construction Stormwater Pollution Plan
Comments: None
Minimum Requirement #3
— Source Control of Pollution
Comments: None
Minimum Requirement #4
— Preservation of Natural Drainage Systems
Comments: None
Minimum Requirement #5
— Onsite Stormwater Management
Comments: None
Minimum Requirement # 6 — Runoff Treatment
Comments: None
Minimum Requirement #7 — Flow Control
Comments: None
Minimum Requirement #8 — Wetland Protection
Comments: None
Minimum Requirement #9 — Operation and Maintenance
Comments: None
Minimum Requirement # 10 — Offsite Analysis and Mitigation
Comments: None
Minimum Requirement #11 — Financial Liability
Comments: None
Thank you.