HomeMy WebLinkAboutObservation of Excavation
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
email: kaglenwood@kumarusa.com
www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
June 11, 2025
Ted and Karen Miller
1248 Rimrock Drive
Rifle, Colorado 81650
ted@tedmillerconsulting.com
Project No. 25-7-114.A
Subject: Observation of Excavation, Proposed Residence, Parcel 13, High Aspen Ranch,
1422 High Aspen Drive, Garfield County, Colorado
Ted and Karen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on June 10, 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 25, 2025, Project No. 25-7-114.
The proposed residence has been designed to be supported on spread footings placed on the
natural soils below the topsoil and sized for the recommended allowable bearing pressure of
2,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in multiple levels to
design bearing level. The soils exposed in the bottom of the excavation mainly consisted of silty
to clayey sand and gravel. A small area in the downhill, southeast corner had been backfilled
with the onsite soils to reestablish design bearing level. The results of an in place density test
taken on the backfill, attached report, indicate adequate compaction to support the design
bearing pressure. No free water was encountered in the excavation and the soils were slightly
moist to 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 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
determining the presence, prevention or possibility of mold or other biological contaminants