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June22,2020
Desiree Attebury
195 North Meadow Drive
Rifle, Colorado 81650
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Project No. 19-7-548
Subject: Observation of Excavation, Proposed Residence, 878 County Road227 (Miller
Lane), Garfield CountY, Colorado
Dear Desiree:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on June 19, 2020 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 October 11, 2019, Project No. l9-7-548.
The proposed residence will be a two-story wood frame structure over a full basement. We
understand that the basement foundation was designed for an allowable soil bearing pressure of
2,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in fwo levels komS'/z
to I 1 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of medium dense, silty sand with gravel. No free water was encountered in the
excavation and the soils were moist.
The soil conditions exposed in the excavation are consistent with those previously encountered
on the site and suitable for support of spread footings designed for the recommended allowable
bearing pressure of 2,000 psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural soils. 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
detennining the presence, prevention or possibility of mold or other biological contaminants
Desiree Attebury
J.sne22,2020
Page2
(MOBC) developing in the future. If the client is concemed about MOBC, then aprofessional in
this special field of practice should be consulted.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associateso Inc.
Daniel E. Hardin,
Rev. by: SLP
DEHlkac
Cc: Jim Rorneo
Kumar & Associates, lnc. o Project No, 19.7-548