HomeMy WebLinkAboutObservation of Excavation 07.26.2023K � Kumar Associates, Inca
Geotechninical 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
July 26, 2023
Tito Ruiz
353 West Orchard Avenue
Silt, Colorado 81652
titoshandymanservicegyahoo.com
Project No. 22-7-736
Subject: Observation of Excavation, Proposed Barn, Lot 2, Ruiz South Minor Subdivision,
County Road 331, Garfield County, Colorado
Tito:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on July 24, 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 for a residence on Lot 2 and
presented our findings in a report dated February 21, 2023, Project No. 22-7-736.
The proposed barn consists of a pole structure designed to be supported on 12 isolated pads sized
for an allowable bearing pressure of 1,500 psf.
At the time of our, visit to the site, the twelve foundation pad excavations had each been cut in
one level about 3 feet below the adjacent ground surface. The soils exposed in the bottom of the
excavation consisted of very sandy silt and clay. No free water was encountered in the
excavation and the soils were 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 with a risk of settlement mainly if the bearing soils are wetted.
Loose 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
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,
Steven L. Pawlak, P.
SLP/kac