HomeMy WebLinkAboutObservation of Excavationtrrtl and Environmental Scientists
An f;nqrlcyec {ttf,fiGd CornPonY
Glenwood Springs, CO 81601
phone: Q7q945-7988
faxr (970) 945-8454
email: kaglenwood@kumarusa.com
www.kumarusa.cotll
Offce Locations: Denver (HQ), Parkeq Colorado Springs, Fort Collins, Glenwood Springs, and Summit County'C-olorado
March 28,2025
Ted Vickerman
P.O. Box 342
Avon, Colorado 81620
tcdvic(aicomcast.net
Pdect No. 24-7-559
Subject:Observation of Excavation, Proposed Residence, Parcel No. 186323200099'
914 Sweetwater Road, Garfield County, Colorado
Dear Ted:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on March 27,2025 to evaluate the soils exposed for foundation support. The
findings of our observations and recofilmendations 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 13,2024, Project No. 24-7-559.
The proposed residence will be a one-story wood-frame structure over a lower walkout basement
level. The lower level will be primarily garage space with living space on the main level above.
The residence has been designed to be supported on spread footings bearing on the natural soils
sized for an allowable soil bearing pressure of 2,500 psf,
At the time of our visit to the site, the foundation excavation had been cut in two levels from 3
to 9 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of relatively dense, basalt cobbles and boulders in a gravelly silty sand matrix. 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 2,500 psf. Loose 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 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.
March 28,2025
PageZ
If you have any questions or need further assistance, please call our office'
Sincerely,
Kumar & Associates, lnc.
James H. Parsons, P
Rev. by: RLD
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