08.11.10-14_St_SW-810-Driveway_waiver.pdfCITY OF EDW)NDS GARY HAAKENSON
MAYOR
121 5TH AVENUE NORTF] - EDMONDS, VVA 98020 - 425-771-0220 - FAX 425-771-0221
Wabsilp: www.cl.edmoncbsW2 LIS
PUBLIC WORK;DEPARTMENT
Engineering Division
August 11, 2010
Jofm C. Gilbert
Gilbert Construction
23415 Timber Lane
Woodway, WA 98020
RE: Single Family Residence permit #W2009078S, 810-14"' St SW
Request to Exceed Driveway Slope of 14%
John,
This letter is being sent in response to your request to exceed the maximum allowed
driveway slope of 14% for a short section of the driveway serving 810-14t" St SW. The
request is to allow for a 20% driveway slope over a distance of approximately 5-10 feet.
The remaining driveway section will fall below 14% slope.
The driveway slope was modified from the original plat -is to provide for better collection
of the storniwater runoff and to direct a majority of the driveway surface runoff to the on-
site storm detention system. In addition, in order to meet minimum cover requirements
over the storm detention pipe located within the driveway, the as -constructed elevations
had to be maintained. Lowering the storm detention pipe would prevent construction of a
storn-i detention system with gravity outfall to the City storm system in 14t" St SV
Given the above considerations, your request to exceed a driveway slope of 14%, but not
more than 20%, for the first 5-10 feet of driveway area has been approved.
Sincerely,
ROBERT S. ENGLISH, P.E.
City Engineer
c. file fibld20090785
Incorporated August 11, 1890
Sistet, City - Hekinan, Japan
GILBERT
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CONSTRUCTION
Edmonds Engineering Division 7/30/10
Attn: Jeanie McConnell
Re: 810 14"h St. SW Edmonds
I Request that a waiver granting approval for a driveway slope greater than
14% be issued for my new construction site at above address.
The overall slope average of this driveway is under 10% but the first five
feet of drive is closer to 20% as a result of raising a hump to make sure all
site runoff went into our retention system and not onto the street.
All efforts were made to minimize this slope and still maintain working
grades for the retention system. The driveway is broom finished concrete.
Thank You,-
John
ou,John G. Gilbert
23415 Timber l .aue, Woodway, WA 98020 (206) D42-7171
REG.rGIL6ECC976DI