HomeMy WebLinkAboutObservation of Excavation 09.16.25
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
September 16, 2025
David Dorr
P.O. Box 4783
Aspen, Colorado 81612
ddorr@hdaspen.com
Project No. 25-7-217
Subject: Observation of House Excavation, Proposed Residence, 555 Wooden Deer Road,
Lot 11, Wooden Deer, Garfield County, Colorado
Dear Mr. Dorr:
As requested, a representative of Kumar & Associates, Inc. observed the completed excavation
at the subject site on September 16, 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 June 13, 2025, Project No. 25-7-217.
At the time of our visit to the site, the foundation excavation had been completed and had been
cut in four levels from 2 to 12 feet below the adjacent ground surface. The materials exposed in
the bottom of the excavation consisted of siltstone bedrock of the Maroon Formation. No free
water was encountered in the excavation and the siltstone was slightly moist.
The subsurface 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 4,000 psf. Loose and disturbed bedrock should be
removed in the footing areas to expose the undisturbed natural bedrock. 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 limited 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