HomeMy WebLinkAboutObservaton 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
July 22, 2025
Rosemary Patterson
228 County Road 343
Silt, Colorado 81652
ranchocostaplenty@yahoo.com
Project No. 25-7-115
Subject: Observation of Excavation, Proposed Deck Addition to Existing Residence,
228 County Road 343, Silt, Colorado
Dear Ms. Patterson:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on July 15, 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 26, 2025, Project No. 25-7-115.
The proposed addition is located on the west side of the existing residence.
At the time of our visit to the site, the foundation excavation had been cut in one level about
2 feet below the adjacent ground surface. The conditions exposed in the bottom of the
excavation consisted of sandstone bedrock. No free water was encountered in the excavation
and the bedrock was slightly moist.
The bedrock exposed in the excavation are suitable for support of spread footings designed for
the recommended allowable bearing pressure of 3,000 psf. Loose and disturbed portions of
bedrock should be removed in the footing areas to expose the undisturbed natural soils. The
footings should be protected from frost. 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 conditions
exposed within the foundation excavation. 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.