HomeMy WebLinkAboutObservation of Excavation 11.30.20211(+AKmw & Associates, Inc.,*
Geotechnical and Materials Engineers 5020 County Road 154
and Environmental Scientists Glenwood Springs, CO 81601
phone: (970) 945-7988
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
November 30, 2021
Peak 3 Construction + Development
Attn: Jeff Claflin
601 East Hopkins Avenue, Suite 202
Aspen, Colorado 81611
jeffgpeak3aspen. com
Project No. 21-7-493
Subject: Observation of Excavation, Proposed Residence, Lot 8, Coryell Ranch,
437 Coryell Ranch Road, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on November 4, 2021 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 July 19, 2021, Project No. 21-7-493.
At the time of our visit to the site, the foundation excavation had been cut in 2 levels from 2%2 to
5 feet below the adjacent ground surface. The step between the shallower garage footing
trenches and the main building area was about 2 feet. The soils exposed in the bottom of the
excavation consisted of silty sandy gravel and cobbles. No free water was encountered in the
excavation and the soils were slightly moist to 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 3,000 psf. Loose disturbed soils in the footing areas should be moistened and
compacted or removed 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 (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
Peak 3 Construction + Development
November 30, 2021
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. 21-7-493