HomeMy WebLinkAboutObservation of Excavation 04.16.2025rcn ****Uggg[r;i**
An Emplorpa Ornsd GotnPonY
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email : kaglenwood@kumarusa'com
www.kumarusa.com
Ofrcelocations: Denver(HQ), Parfter, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, C,olorado
Apil16,2O25
Giard Homes
Attn: Roger Giard
P. O. Box 1369
Glenwood Springs, Colorado 81602
ro eer. giard@ qiardhomes. com
Subject:
Project No.24-7-L69.4
Observation of Excavation, Proposed Residence, Lotl9,Coryell Ranch,29 Spirit
Mountain Road, Garfield County, Colorado
Dear Roger:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on April I I and 14,2025 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 March 20,2024, Project No.24'7'L69.
The proposed residence is similar to that described in our previous report and will be a l-story
structure with an attached gange. The ground floor will be structural over crawlspace except
in the slab-on-grad e garcge. The foundation is designed for and allowable bearing pressure of
4,000 psf.
At the time of our visit to the site, the foundation excavation had been cut in 2 levels from 2 to
6 feet below the adjacent ground surface. The soils exposed in the bottom ofthe excavation
consisted of relatively dense, silty sandy gravel and cobbles. Clay soils were exposed near the
middle of the excavation. The clay soils had a maximum depth of I foot and were removed and
replaced with onsite coarse-gtained soils. 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 4,000 psf. Loose and 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 recornmendations 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 fotrndation
movement. We should be advised of any variations encountered in the excavation conditions