HomeMy WebLinkAboutObservation of Excavation 05.08.20231(+A Kum ni Ciates,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 ftooyee Owned Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
May 8, 2023
Steve Beckley
2645 County Road 241
New Castle, Colorado, 81647
sbeckley@glenwoodcavems.com
Project No. 22-7-748
Subject: Observation of Excavation, Proposed Barn, 2645 County Road 241, Garfield County,
Colorado
Dear Steve:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on May 5, 2023 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 May 8, 2023, Project No. 22-7-748.
We understand the proposed barn has been designed to be founded on spread footings bearing on
the natural soils and sized for an allowable bearing pressure of 1,500 psf.
At the time of our visit to the site, the foundation excavation had been cut in one level from 4 to
5 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of relative stiff/dense clayey to very clayey silty sand with scattered gravel. 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 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
(MOBC) developing in the future. If the client is concerned about MOBC, then a professional in
this special field of practice should be consulted.
Steve Beckley
May 8, 2023
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates,
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Robert L. Duran, 0 s /l/W
Rev. by: SLP �2��./s..••
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Kumar & Associates, Inc. -'� Project No. 22-7-748