HomeMy WebLinkAboutObservation of Excavation 12.17.2025Kumar & Associates, Inc.® 5020 County Road 154
K Geotechnical and Materials Engineers Glenwood Springs, CO 81601
and Environmental Scientists phone: (970) 945-7988
email: kaglenwood@kumarusa.com
Z www.kumarusa.com
An Employee Owned COMPOny
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
December 17, 2025
RM Construction
Attn: Loren McColley
5030 County Road 154
Glenwood Springs, Colorado 81601
Ioren4ftildwithrm.com
Project No. 25-7-449.A
Subject: Observation of Excavation, Proposed Residence, Lot 22, High Aspen Ranch,
966 Overlook Drive, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on December 16, 2025 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 August 21, 2025, Project No. 25-7-449. The current
observation was performed in accordance with our agreement for professional services with
RM Construction dated December 12, 2025.
The proposed residence has been designed to be supported on spread footings placed on
the natural soils and sized for the recommended allowable bearing pressure of 2,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in 3 levels from about
3 to 15 feet below the adjacent ground surface with steps between levels of about 2 to 3 feet
down to the southeast. The soils exposed in the bottom of the excavation consisted of silty
clayey volcanic sand and gravel with cobbles. No free water was encountered in the excavation
and the soils were slightly moist to moist and not frozen.
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 2,000 psf. Loose disturbed soils should be removed in the footing areas to
expose the undisturbed natural soils. The bearing soils should be protected from 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.
RM Construction
December 17, 2025
Project No. 25-7-449.A
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, I
Steven L. Pawlak,
SLP/kac
Cc
RM Construction —
Kumar & Associates, Inc