HomeMy WebLinkAboutObservation of Excavation 11.08.23Kumar & Asaaciates, Inc.®
K Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
Z - email: kaglenwood@kumamsa.com
An Employee Chemed Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
November 8, 2023
Red House Architecture
Attn: Bruce Barth
815 Blake Avenue
Glenwood Springs, Colorado 81601
brute(&_,redhousearchitecture.com
Project No. 16-7-521.A
Subject: Observation of Excavation, Proposed Residence, Lot 29, Coryell Ranch,
140 Spirit Mountain Road, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on November 8, 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 November 8, 2016, Project No. 16-7-521. The current
observation was performed in accordance with our agreement for professional services with
Red House Architecture dated November 7, 2023.
At the time of our visit to the site, the foundation excavation had been cut in one level about
2'h feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of relatively dense, silty sandy gravel and cobbles. 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 3,000 psf. Loose disturbed soils in the footing areas should be compacted
or removed 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.
Red House Architecture
November 8, 2023
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Assoi
Steven L. Paw
SLP/kac
Kumar & Associates, Inc. � Project No.16.7-521.A