HomeMy WebLinkAboutObservation of Excavation 09.18.23IV —An
Geol c i; Associates, Inc.
Geotehnical 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
M Empjo"o 8d C4tYlpany www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
September 18, 2023
Ada Chavez
71 Ridge View Place
Battlement Mesa, Colorado 81635
adachavez6(& gmail. com
Project No. 23-7-220
Subject: Observation of Excavation, Proposed Residence, Lot 15, Block 4, Battlement
Creek Village, 195 Boulder Ridge Drive, Garfield County, Colorado
Dear Ada:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on September 14, 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 16, 2023, Project No. 23-7-220.
At the time of our visit to the site, the foundation excavation had been cut in three main levels
from 3 to 10 feet below the adjacent ground surface. The soils exposed in the bottom of the
excavation consisted of medium dense, very silty sand. 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. The lowest level of the excavation had not yet been compacted at
the time of our site visit. Loose and disturbed soils should be compacted or 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, 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 mop REOj�
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Daniel E. Hardin, P. 14-
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