HomeMy WebLinkAboutObservation of Excavation 04.26.24Kumar & Associates, 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
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
April 26, 2024
Modfin Design Build
Attn: Keith Wittenberg
243 Elk Ridge Drive
Glenwood Springs, Colorado 81601
shag sg_09_(&yahoo.com
Project No. 24-7-160
Subject: Observation of Excavation, Proposed Residence, Lot 15, Springridge Place,
Deer Valley and Springridge Drive, Garfield County, Colorado
Dear Keith,
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on April 26, 2024 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 March 20, 2024, Project No. 24-7-160. The current observations were
performed in accordance with our agreement for geotechnical engineering services with you
dated February 20, 2024.
At the time of our visit to the site, the foundation excavation had been cut to 2 main levels from
about 5 feet to about 1'/2 feet below the adjacent ground surface with depth decreasing toward
the south. At all foundation levels the excavation exposed a slightly clayey silt and sand with
scattered gravel and the exposed soils had been compacted. 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. Any loose and disturbed soils should be removed in the footing
areas to expose the undisturbed natural soils prior to the placement of concrete. The bearing
soils should be protected against frost, and concrete should not be placed on frozen 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.
Modfin Design Build
May 8, 2024
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
David Noteboom, Staff
Reviewed by:
Daniel E. Hardin, P.
DEH/kac
Kumar & Associates, Inc. 0 Project No. 24-7-160