HomeMy WebLinkAboutObservation of Excavation 09.25.24Ilk1-11 Kumar &Associates, Inc. ®
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 Employ" Chwwd Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
September 25, 2024
Jesus H. Salinas
P.O. Box 1799
Glenwood Springs, Colorado 81602
Salinasj esus23 (a,p,mail. com
Project No. 22-7-12LA
Subject: Observation of Excavation and Backfill Compaction Results, Proposed
Residence, Lot 3, Mineota Estates, Mineota Drive, Garfield County, Colorado
Gentlemen:
As requested by Jose Gonzales, a representative of Kumar & Associates, Inc. observed the
excavation at the subject site on September 12, 2024 for foundation bearing soils and backfill
compaction testing. The findings of our observations and compaction test results 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 March 28, 2022, Project No. 22-7-121.
The proposed residence has been designed to be supported by spread footings placed on a
minimum 3 feet of compacted structural fill supported by the natural 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 down into the natural
clay soils. The sub -excavated depth of 3 feet was then backfilled with compacted 3/-inch road
base to design footing grade. The results of in -place moisture and density tests performed on
September 12, 13 and 18, 2024 (reported separately) indicate compaction to the recommended
minimum relative density of 98% standard Proctor density suitable for support of spread footings
designed for the recommended allowable bearing pressure of 2,000 psf. Other recommendations
presented in our previous report which are applicable should also be observed.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
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