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5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
May 4, 2023
Rick Farr
1310 West Spruce Court
Rifle, Colorado 81650
farr9599@msn.com
Project No. 21-7-895
Subject: Observation of Excavation, Proposed Residence, Lot 2, Block 6, Stone Ridge,
Battlement Mesa, 91 Lodge Pole Circle, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on April 5, 2023 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 8, 2022, Project No. 21-7-895.
At the time of our visit to the site, the foundation excavation had been cut in one level from
about 2 to 6 feet below the adjacent ground surface. The soils exposed in the bottom of the
excavation consisted of sandy silt and clay. Results of swell-consolidation testing performed on
a sample taken from the site, shown on Figure 1, indicate the soils are compressible under
conditions of loading and wetting. 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 1,200 psf with a risk of settlement mainly if the bearing soils are wetted.
Loose disturbed soils should be removed and the exposed soils in the footing areas moistened
and compacted. Due to the hydro-compressibility of the bearing soils, a perimeter subdrain
should not be provided to help limit wetting of the bearing 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
determining the presence, prevention or possibility of mold or other biological contaminants
Kumar & Associates