Nelson Geotech Field Report 2 Binder 9.24.2020FIELD REPORT
N ELSON Project:
GEOTECHNICAL Owner:
ASSOCIATES, INC Location:
17311 135th Ave. NE #A-500 Weather:
Woodinville, WA 98072 Purpose of
(425) 486-1669 FAX 481-2510
105 Palouse Street Visit:
Wenatchee, WA 98801
(509) 665-7696
COE # BLD2020-0412
Binder Residence Development
Deborah Binder & Gaetan Veilleux
8912 —192nd St SW, Edmonds, WA
Rain, 587
Geotechnical Consultation and
Construction Monitoring
NGA File: 115441320
Date: 9/24/2020
Report No: 2
Page 1 of 2
By: CTC
We visited the site today on behalf of the owners to observe the drainage system installation and temporary cut
conditions located at the above address in partial fulfilment of the permit requirements. Upon arrival we met with
John the contractor to discuss the current status of the project.
Upon arrival to the site, we observed that foundations had been completely constructed, and that footing drains
had been installed around the lowest exterior portions of the structure in temporary excavations. Drain board was
installed on subsurface walls above footing drains. Footing drains were properly oriented and connected, and
were connected on either side of foundations with sleeve 'culverts' beneath the footings where necessary. We
understand the contractor intends to place drain rock above the footing drains, which was partially stockpiled on -
site. Other areas of backfill are intended to utilize select, native excavation spoils.
While on site, we also observed the cut stability of the basement excavations. Temporary excavation cuts were
roughly 8 feet in height and consisted completely of the native, glacial till. We observed no signs caving or signs
of imminent failure while on site. Temporary cuts appeared stable at the time of our site visit.
We are currently experiencing significant precipitation. We documented the presence of erosion control in the
form of silt fencing on the downhill, western portion of the site. We recommended covering soil stockpiles to
retain optimum moisture content, due to their fine-grained nature. If stockpiles are exposed to too much
precipitation, they may not function adequately as backfill until dried back to optimum conditions.
We have been providing geotechnical consultation and construction monitoring services on a part-time basis. Our
findings and conclusions are based on specific observations made while on site. In our opinion, the drainage
installed around the perimeter of the foundations appeared to be installed correctly. We will continue to monitor
the construction, specifically backfill compaction processes in accordance with permit requirements, and are
available to return to the site upon request to provide additional consultation.
Attachment: Site Plan
Signed: t.,4
Distribution: Carston T. Curd, GIT
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All drawings approximate