HomeMy WebLinkAboutObservation of Excavation 03.12.25Kumar & 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@kumamsa.com
An Employee Owned Compony www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
March 12, 2025
Burkholder Construction
Attn: Todd Burkholder
P.O. Box 400
Carbondale, Colorado 81623
todd.bci 14(&P- nail.com
Project No. 19-7-570.A
Subject: Observation of Excavation, Proposed Residence, Lot F-13, Aspen Glen,
191 Mountain Meadow Circle, Garfield County, Colorado
Dear Todd:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on March 6, 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 October 11, 2019, Project No. 19-7-570.
The proposed residence will be a one- and two-story wood frame structure with attached garage.
The residence has been designed to be supported on spread footings sized for an allowable
bearing pressure of 3,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in one level from 2 to
3 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of relatively dense, silty sandy gravel and cobbles. No free water was encountered
in the excavation and the soils were slightly 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 disturbed soils should be removed in the footing areas to
expose the undisturbed natural soils. The bearing soils should be protected from frost and
concrete should not be placed on frozen 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
Burkholder Construction
March 12, 2025
Page 2
(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,
James H. Parsons, P
Reviewed by:
Daniel E. Hardin, P.E.
JHP/kac
Kumar & Associates, Inc. 0 Project No.19-7-570.A