HomeMy WebLinkAboutObservation of Excavation 05.02.2019Kumar & Asocial, his.'
Geotet;hniccl and Materials Engineers
and Environmental Scientists
An Employee Owned Company
5020 County Road 154
Glenwood Springs, CO 81601
phone: (970) 945-7988
fax: (970) 945-8454
email: kaglenwood@kumarusa.com
www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
May 2, 2019
Viccos, LLC
Attn: Bart Victor
0607 Westbank Road
Glenwood Springs, Colorado 81601
view 1 @comcas t. net
Subject:
Gentlemen:
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Project No. 18-7-639
Observation of Excavation, Proposed Vehicle Barn, 45755 US Highway 6,
Garfield County, Colorado
As requested by Jeremy Davis, a representative of Kumar & Associates, Inc. observed the
excavation at the subject site on April 30, 2019 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 November 9, 2018, Project No. 18-7-639.
The proposed bam is located adjacent the existing barn. Shallow spread footings placed on the
natural soils and sized for an allowable bearing pressure of 1,000 psf were recommended for the
foundation support.
At the time of our visit to the site, the perimeter footing trench excavation had been cut in 2
levels from 1 %2 to 51/2 feet below the adjacent ground surface. The thickened slab foundation of
the existing barn was exposed in the excavation side. The soils exposed in the bottom of the
excavation consisted of silty clayey sand with scattered gravel which appeared medium dense.
Sandy silt soils were exposed on the cut faces of the foundation excavation. Localized areas of
standing water were observed in the excavation from recent heavy precipitation.
The soil conditions exposed in the excavation are generally consistent with those previously
encountered on the site and suitable for support of spread footings designed for the
recommended allowable bearing pressure of 1,000 psf. Loose disturbed soils should be removed
in the footing areas to expose the undisturbed natural soils. The standing water in the excavation
should be collected and diverted away from the footing areas and any softened soils and mud
removed before concrete placement. 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 limited 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
Viccos, LLC
May 2, 2019
Page 2
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.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
Steven L. Pawlak,
SLP/kac
Kumar & Associates, Inc. Project No. 16-7-639