HomeMy WebLinkAboutObservation of Excavation 05.02.2022K+AKumar & Associates, Inc. 0
Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
L 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
May 2, 2022
Larry Mauldin
85 Rapids View Lane
New Castle, Colorado 81647
laM(a)melsplumbingandsheeting com
Project No. 22-7-330
Subject: Observation of Excavation, Proposed Barn, Lot 5, Rapids on the Colorado, 85
Rapids View Lane, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on April 30, 2022 to evaluate the soils exposed for foundation support. The findings
of our observations and recommendations for the foundation design are presented in this report.
Hepworth-Pawlak Geotechnical (now Kumar & Associates) previously conducted a subsoil
study for design of foundations at the site and presented the findings in a report dated March 31,
2004, Job No. 103 198.
The proposed barn is located in the southwestern part of the building envelope and designed for
footing pads placed on the gravel soils sized for an allowable bearing pressure of 3,000 psf.
Perimeter grade beam foundation walls will be placed on the footing pads at frost depth.
At the time of our visit to the site, the foundation excavation had been cut in one level from 2 to
3 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of dense, slightly silty sand, gravel and cobbles. There was about 2 to 2'/z feet of
topsoil and silty sand soil above the gravel bearing soils exposed in the cut face. No free water
was encountered in the excavation and the soils were slightly moist.
The gravel 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 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
Larry Mauldin
May 2, 2022
Page 2
(MOBC) developing in the future. If the client is concerned about MOBC, then a professional in
this special field of practice should be consulted.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc. _,zsm,
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Steven L. Pawlak, P.E.I$ .Ci*'
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Kumar & Associates, Inc. -,' Project No. 22-7-330