HomeMy WebLinkAboutObservation of Excavation 07.29.24Kumar &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@kumanasa.com
An Employ" Owned Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
July 29, 2024
Ram Development
Attn: Bobby Almazan
P.O. Box 1387
Carbondale Colorado 81623
bobbykramdev.build Project No. 23-7-189
Subject: Observation of Excavation, Proposed Residence, 12730 Highway 82, East of
Carbondale, Garfield County, Colorado
Dear Bobby:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on July 23, 2024 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 March 29, 2023, Project No. 23-7-189.
At the time of our visit to the site, the foundation excavation had been cut in four levels from 3
to 6 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of relatively dense, silty sand gravel with cobbles. 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 previously encountered
on the site and suitable for support of spread footings designed for the recommended allowable
bearing pressure of 3,000 psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural soils. 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 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
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.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
Danie
Rev. t
DEH/