HomeMy WebLinkAboutObservation of Excavation 05.12.2022
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 12, 2022
MMME-WG, LLC
Attn: Matt Petrak
P.O. Box 130
Glenwood Springs, Colorado 81602
mpetrak@gouldconstruction.com
Project No. 19-7-437.01
Subject: Observation of Excavation, Proposed Employee Housing Building, West of
Ami’s Acres, Highway 6, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on May 9, 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.
We previously provided recommendations for design of foundations at the site in a report dated
January 4, 2022, Project No. 19-7-437.
Footings placed on the natural soils and sized for an allowable bearing pressure of 2,000 psf
were designed for the foundation support.
At the time of our visit to the site, the foundation excavation had been cut in one level from 2½
to 3½ feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of silty sand and gravel with cobbles. The results of a gradation analysis performed on
a sample of the exposed soil (minus 5-inch fraction) obtained from the site are presented on
Figure 1. 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 2,000 psf. Loose disturbed soils in the footing areas should be removed or
moistened and compacted. 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