GeotechnicalAddendum.pdfJuly 14, 2008
HWA Project No. 2006-171-21
Gray & Osborne, Inc.
701 Dexter Avenue Norh Suite 200
Seattle, Washington 98109
.Attn: Ms. Tarsi :Stafford, P.E.
Proj ect Manager
RI
JUL 21 1008
®EI/ELOPMENT SERVICEq
COUNTER
LOGICAL HAZARDS ASSESSWNT
76TH AVENUE WEST AND 75TH PLACE WEST WALKWAY IMPROVEMENTS
EDMONDS; WASWNGTON
Dear Tani:
This letter is an addendum to the original geotechnical report as requested by the Hearing
Examiner. In compliance with the City of Edmonds Critical Areas Ordnance ECDC 23.,80.060;
Development Standards, we offer the following:.
The proposed 76th Avenue West and 75th Place West Walkway Improvements Project,
intluding the proposed park at 162nd Street has been designed in such a way that it will not
increase surface water discharge or Sedimentation to adjacent properties beyond predevelopment
:conditions; it will not decrease slope stability on adjacent properties; and it will not adversely
impact other critical areas. The proposed construction will result in. increased stability in soiree
areas, including the stabilization of an existing landslide on the park property; with no impact in
other areas.; In out opinion buffers are not applicable to this project as the work will include
construction of retaining walls and fill placement to increase the stability of steep slopes.
We appreciate the opportunity to provide geotechnical services on this project.
Sincerely,
HWA GwSlcmNCES IN,
Ralph -M Boirunn, P.E.
Geotechnical Engineer,. Principal