HomeMy WebLinkAboutObservation of Excavationrcrt l(umr & Assoclato$, lnc. I
Geotechnical and Malerials Engineers
and Environmental Scientists
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
email : kaglenwood@kumarusa.com
www.kumarusa.com
All llrplol'ta olmcd ComPanY
ffice Locations: Denver(HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
July 14,2025
Tom Lester
P.O. Box 2329
Basalt, Colorado 81621
tom l@lesterdevelopment.com
Project No. 25-7-162.06
Subject Observation of Excavation, Proposed Residence, Lot 6, Whitecloud Ridge,
Garfield CountY, Colorado
Dear Tom:
As requested, a representative of Kumar & Associates, lnc. observed the excavation at the
subject site on July 1 1, 2025 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 February 27, 2025, Project No. 25-7-162.06'
The proposed residence will be a two-story wood frame structure over a partial basement level.
The residence has been designed to be supported on spread footings sized for an allowable
bearing pressure of 2,000 Psf.
At the time of our visit to the site, the foundation excavation had been cut in four levels from 3 to
I feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of medium dense, sandy silty clay with scattered gravel and cobbles. No free water
was encountered in the excavation and the soils'were slightly 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
novement. 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. lf the client is concerned about MOBC, then a professional in
this special field of practice should be consulted.