REVIEWED PLN RESUB1 BLD2022-0076 +UPDATED GEOTECH LETTER+3.16.2022_10.30.16_AM+2740828Robert M. Pride, LLC Consulting Engineer
February 29, 2022
Mr. Jason Duncombe
c/o Richard Okimoto AIA
9924 225th Place SW
Edmonds, WA 98020
Re: Final Geotechnical Plan Review
Proposed Residence Addition
18426 79th Place SW
Edmonds, Washington
Dear Mr. Okimoto,
This report is in response to the city of Edmonds requirements regarding overall slope
stability and appropriate building setback distances from the top of the existing slope
located on the west side of this property. As previously stated the final plans have been
reviewed and they are approved from the geotechnical point of view. As required they
comply with ECDC 23.80.060.
Detailed observations were made of the steep slope area to determine overall stability
conditions of this slope. There was no evidence of any landslide activity or shallow slope
instability on or adjacent to this property due to the dense glacial soils that have main-
tained long term stability on this steep slope. Assessment of this 14 to 16 foot high steep
slope area showed that it exceeded a factor of safety of 2.2 and would maintain
permanent lateral and vertical support to the proposed residence addition and the new
storage shed that will be 12 feet from the top of the slope on the south side of this site.
Storm water will be collected from the roof areas and be discharged into the storm drain
system along 79th Place NW. Rainfall that drops onto the flat rear and side yard areas
will be absorbed by the upper topsoils and vegetation growth, and all this storm water
has been acceptably discharged since this property was developed for residential use.
Respectfully,
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Robert M. Pride, P. E.
dist: (1) Addressee
Robert M. Pride, LLC
13203 Holmes Point Drive NE
rmp: Duncombe79thRes4
Page 1
Kirkland, WA 98034