HomeMy WebLinkAboutObservation of Excavation 10.25.2023Kumar & Assoelates, lnc.®
K 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 Employso Owrod Company www.kumarusa.com
Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado
October 25, 2023
Domoplex, LLC
Attn: Slawek Wojciuch
2550 Highway 82, Unit 108A
Glenwood Springs, Colorado 81601
slawek(&domoplex.com
Project No. 22-7-530
Subject: Observation of Excavation, Proposed Residence, Lot 49, Filing 9, Elk Springs,
0034 Vista Place, Garfield County, Colorado
Gentlemen:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on October 23, 2023 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 15, 2022, Project No. 22-7-530.
The proposed residence is similar to that described in our previous report and has been designed
to be supported by spread footings sized for an allowable bearing pressure of 2,500 psf.
At the time of our visit to the site, the foundation excavation had been cut in one level from
about 4 to 8 feet below the adjacent ground surface. The soils exposed in the bottom of the
excavation mainly consisted of basalt rock in a calcareous silt matrix. The middle to south part
had been covered with a leveling course of well compacted road base. 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 2,500 psf. Loose disturbed soils in the footing areas should be 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 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.
Domoplex, LLC
October 25, 2023
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Assoc
Steven L. Pawl
SLP/kac
Kumar & Associates, Inc. 1 Project No. 22-7-530