HomeMy WebLinkAboutObservation of Excavation 06.14.2023
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
June 14, 2023
Jimmy Polowchena
745 County Road 127
Glenwood Springs, Colorado 81601
Jimbobpolo17@gmail.com
Project No. 23-7-317
Subject: Observation of Excavation, Proposed Addition, 245 CR 127, Garfield County,
Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on June 1, 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.
The services were conducted according to our agreement for professional services with Jimmy
Polowchena dated May 30, 2023.
We understand the proposed addition has been designed to be founded on spread footings
bearing on the natural granular soils and 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 one level about
10 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of silty sand with gravel and cobbles. The results of a gradation analysis performed on
a sample of silty sand with gravel (minus 5-inch fraction) obtained from the site are presented on
Figure 1. 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 typical of the area 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
The recommendations submitted in this letter are based on our observation of the soils exposed
within the foundation excavation 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 (MOBC) developing in the future. If the
client is concerned about MOBC, then a professional in this special field of practice should be
consulted.
Kumar & Associates