HomeMy WebLinkAboutObservation of Excavation 06.10.2021Komar & Assockdes, 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 Employee Owned Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
June 10, 2021
Todd and Katie Hundertmark
c/o Daybreak Construction
Attn: Dana Yerian
P.O. Box 587
Glenwood Springs, Colorado 81602
daybreakconst(a,hotmail. com
Project No. 20-7-547
Subject: Observation of Excavation, Proposed Residence, 11707 County Road 245
(Buford Road), Garfield County, Colorado
Dear Dana:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on June 4, 2021 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 30, 2020, Project No. 20-7-547.
The proposed construction is similar to that discussed in that report. Spread footings bearing on
the natural granular soils were designed for foundation support of the building based on
recommendations provided in our previous report.
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 medium dense, silty clayey sand with gravel. 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 1,500 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
Todd & Katie Hundertmark
c/o Daybreak Construction
June 10, 2021
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, Inc.
6f!
Shane M. Mello, Staff Engineer
Reviewed by:
Danis
SM1V
Kumar & Associates, Inc. Project No. 20-7-547