ENG Comments STORM2_BLD20200142_23517 75th Ave Wof EDM STO RM WATE R REVIEW COMMENTS
City of Edmonds
Engineering Division
To: Applicant
Date: April 24, 2020
Project Name: Lake Ballinger Lot 1
Permit Number: BLD2020-0142
Address: 23517 75t' Ave W
Review Type: Building (SFR)
Submittal Date: 4/9/2020
Reviewer: Zack Richardson, PE
City of Edmonds, Stormwater Engineer
Recommendation: It appears that none of the Drevious comments were responded to
and/or the additional information was not submitted: the comments below are repeated
in their entirety from the previous review letter dated 3/11/2020. The submitted
documents do not include sufficient storm information for the improvements to be
constructed or confirmed as sufficient. I recommend that BLD2020-0142 be withheld
until the comments below are adequately addressed.
Review Comments:
1. Prepare a drainage `report':
a. If this building permit proposal will rely on the existing civil plans, include a
simplified memo which establish the final propose impervious surfaces,
the approved impervious surfaces per the civil plans/plat drainage report,
and how the project remains consistent with previous approvals.
b. If not relying on the approved civil plans, prepare a full drainage report per
ECDC 18.30 which includes sizing information for any proposed BMPs.
2. Prepare storm water site plan:
a. If this building permit submittal is relying on the existing civil plans, include
copies of the plans with documents included with this permit submittal.
i. Coordinate with the engineering review to avoid conflicts with their
direction regarding other civil improvements/utilities.
b. If not relying on the approved civil plans, submit new drawing which show
all proposed storm drain improvements and include details (showing
dimensions, thicknesses, materials, etc) sufficient for construction of all
improvements (including a planting plan for bioretention areas and soils
amendment detail for BMP 5.13).
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3. It appears the `pervious walkway' is new feature; provide full details needed for
construction and include this area as a impervious hard surface in the impervious
totals.
a. If impervious surfaces exceed civil plans, this must include the full depth of
storage rock beneath the pavers in order to meet code requirements for
mitigation (see SD-623).
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