HomeMy WebLinkAboutObservation of Excavation 10.11.20221(+AKumar ni Assocta etnc.®
Geo
Ceo#ecechnicai 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
October 11, 2022
Smith Mountain Builders
Attn: Zach Smith
1011 Heritage Drive
Carbondale, Colorado 81623
smithmountainbuilders(,4,gmai l . com
Project No. 21-7-852
Subject: Observation of Excavation, Proposed Residence, Lot H-8, 47 Spire Ridge Way,
Aspen Glen Subdivision, Garfield County, Colorado
Dear Mr. Smith:
As requested, the undersigned representative of Kumar & Associates, Inc. observed the
excavation at the subject site on October 11, 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 conducted a subsoil study for design of foundations at
the site and presented our findings in a report dated January 17, 2022, Project No. 21-7-852.
The proposed residence will be a one and two-story wood frame structure over a crawlspace.
The attached garage will have a slab -on -grade floor.
At the time of our visit to the site, the foundation excavation had been cut in one level from 31/2
to 61/2 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of stiff sandy silty clay. 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 1,500 psf. Loose and 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
(MOBC) developing in the future. If the client is concerned about MOBC, then a professional in
this special field of practice should be consulted.
Smith Mountain Builders
October 11, 2022
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates, Inc.
Dai
Rei
DE
Kumar & Associates, Inc.' Project No. 21-7-852