HomeMy WebLinkAboutObservation of Excavation 06.17.20221f+AKumar aAssecllate%Inc. ®
Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
An Employee OwMd ConVany www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
June 17, 2022
Uriel Mellin
144 Cliffrose Way
Glenwood Springs, Colorado 81601
uriel.mellin(c_0otmail.con i
Project No. 21-7-900.A
Subject: Observation of Excavation, Proposed Residence, 64 Cliffrose Way, Lot 44,
Pinyon Mesa, Garfield County, Colorado
Dear Uriel:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on June 13, 2022 to evaluate the soils exposed for foundation support. The findings
of our observations and recommendations for the foundation design are presented in this report.
We previously conducted a subsoil study for design of foundations at the site and presented our
findings in a report dated January 17, 2022, Project No. 21-7-900.
At the time of our visit to the site, the foundation excavation had been cut in three levels from 3
to 12 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of medium stiff, sandy silt and clay. No free water was encountered in the excavation
and the soils were moist. Excavation was about complete and the subgrade was being compacted
prior to placement of structural fill.
The soil conditions exposed in the excavation are consistent with those previously encountered
on the site and suitable for support of spread footings placed on 5 feet of on -site structural fill
and designed for the recommended allowable bearing pressure of 1,500 psf. Density testing of
the structural fill will be provided separately. Other recommendations presented in our previous
report which are applicable should also be observed.
The recommendations submitted in this letter are based on our observation of the soils exposed
within the foundation excavation and the previous subsurface exploration at the site. Variations
in the subsurface conditions below the excavation could increase the risk of foundation
movement. We should be advised of any variations encountered in the excavation conditions for
possible changes to recommendations contained in this letter. Our services do not include
determining the presence, prevention or possibility of mold or other biological contaminants
(MOBC) developing in the future. If the client is concerned about MOBC, then a professional in
this special field of practice should be consulted.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
L
Daniel E. Hardin, P.E. "�_"'
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cc: Brian Kurtz (kurtzenLom