pln20140023-Harter-ADU.pdfMEMORANDUM
Date: July 16, 2014
To: Kernen Lien, Planner
From: Jeanie McConnell, Engineering Program Manager
Subject: PLN20140023 — ADU
Harter — 9630 2381h St SW
The comments provided below are based upon review of the application and documents
submitted for an accessory dwelling unit at 9630 2381h St SW. Additional information is
requested from the applicant at this time. Please ask the applicant to respond to the following.
1. A new rockery has been shown along the west side of the proposed driveway. The
driveway would place a surcharge on the rockery which is prohibited by ECDC
18.45.020. Please revise the plans to show an engineered retaining wall instead of a
rockery. The retaining wall design does not to be submitted until the building permit
stage of the project.
2. Plans indicate an addition and new asphalt drive will be constructed for the ADU, which
will create a significant amount of new impervious surface area. City code requires
stormwater management (SWM) to be provided when impervious surface areas created
after 1977 exceed 2000sf. This aspect of the project will also be reviewed in detail during
the building permit phase of the project. It is requested at this time, however, that you
revise the plans for the ADU to include approximate impervious surface area calculations.
If the proposed areas exceed 2000sf please also note that SWM will be provided.
Thank you.
City of Edmonds