HomeMy WebLinkAboutEvaluation of Bearing Conditions 12.06.20231(+A Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
--`, phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
An Employee CWned Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
December 6, 2023
Charles Carter
77 Puma Lane
Carbondale, Colorado 81623
cmcarterl0 a,aol.com
Project No. 17-7-247.01
Subject: Evaluation of Bearing Conditions for Residence Foundation Support, Lot El 1,
Filing 1, Aspen Glen, 77 Puma Lane, Garfield County, Colorado
Mr. Carter:
As requested, the undersigned representative of Kumar & Associates met with you and observed
the construction at the subject site on December 5, 2023 for evaluation of the 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 April 14, 2017, Project No. 17-7-247. The current
observation was performed in accordance with our agreement for professional services with you
dated December 5, 2023.
The construction consists of a one and two-story, single-family residence above crawlspace and
slab -on -grade floors. Spread footings placed on the natural gravel soils and sized for an
allowable bearing pressure of 2,000 psf were designed for the foundation support. The previous
subsoil study recommended an allowable bearing pressure of 3,000 psf.
At the time of our visit to the site, the building was nearing completion. The terrain is relatively
flat with a gentle slope and about one foot of elevation difference across the building footprint.
The footing depth of the crawlspace is around 4 feet and in the slab -on -grade areas is around
3 feet. The soils encountered in the exploratory borings drilled at the site consisted of about
one-half foot of topsoil above dense gravel. Photos provided by Mr. Carter of the building
excavation during footing construction reviewed as part of our current bearing conditions
evaluation showed the excavation to be down into the natural gravel soils.
Based on our review of the building and site conditions and the project photos, the soil
conditions exposed in the excavation are consistent with those previously encountered on the site
and suitable for support of spread footings sized for the design allowable bearing pressure of
2,000 psf. Other conditions, recommendations and precautions presented in our previous report
which are applicable should also be considered and observed.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associ
Steven L. Pawk
SLP/kac