RESUB 2-BLD2023-1474+ENG STRM-Geotechnical_Letter+4.4.2024_10.17.40_AM+4176506BLD2023-1474 RESUB
Apr 04 2024
COBALT
G E 0 S C I E N C E S
April 3, 2024
Landsverk Quality Homes
Attn: Duane Landsverk & Joseph Rowett
24113 56th Avenue West
Mountlake Terrace, Washington
RE: Plan Review
Proposed Development
Maplewood Lot A, B, and C
8811, 8817, and 8823 194th Street SW
Edmonds, Washington
Cobalt Geosciences, LLC
P.O. Box 1792
North Bend, WA 98045
In accordance with your authorization, Cobalt Geosciences, LLC has prepared this letter to
discuss our plan review of the three building lots at or near the referenced address.
Permeable driveways and walkways/patios are proposed at each lot as shown in the provided
plans by Omega Engineering, Inc (March 2024). These systems are anticipated to be within 2 feet
of the ground surface, which will be in the weathered glacial till deposits. We recommend
stripping topsoils and vegetation and removal of any undocumented fill from these areas,
exposing stable, weathered glacial till. Areas must be protected from compaction or siltation.
We should be on site to verify relvent aspects of site development, including soil bearing
verification, foundation drainage placement, permeable pavement subgrade verification,
excavations, and fill compaction.
Sincerely,
Cobalt Geosciences, LLC
QP�WONY
OF WA
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4/3/2024
Phil Haberman, PE, LG, LEG
Principal
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www.cobaltgeo.com (2o6) 331-1097