HomeMy WebLinkAboutObservation of Excavation 09.09.20211(+Aandni ia,mc.0
Geotechnical and Materials Engineers 5020 County Road 154
Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
1 fax: (970) 945-8454
email: kaglenwood@kumarusa.com
An Employee Uwned Co�,-uipany www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
September 9, 2021
David Rowley
8310 Banpo Bridge Way
Delray Beach, Florida 33446
dsrowley .gmail.com
Project No. 21-7-444
Subject: Observation of Excavation, Proposed Residence, Lot 25, Callicotte Ranch, 1121
Callicotte Ranch Road, Garfield County, Colorado
Dear Mr. Rowley:
As requested, the undersigned representative of Kumar & Associates, Inc. observed the
excavation at the subject site on September 9, 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 June 21, 2021, Project No. 21-7-444.
At the time of our visit to the site, the foundation excavation had been cut in two levels from 11/Z
to 7 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of hard, sandy silt and clay. 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 limited subsurface exploration at the site.
Variations in the subsurface conditions below the excavation could increase the risk of
David Rowley
September 9, 2021
Page 2
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.
Dani
Revif
cc: RM Construction — Billy Shank (billy(a,buildwithrm.com)
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Kumar & Associates, Inc. 0 Project No. 21-7-444