HomeMy WebLinkAboutObservation of Excavation 05.03.2023Kumar Associates, Inc.1(+Aand
Geotechninicai and Materials Engineers 5020 County Road 154
Environmental Scientists Glenwood Springs, CO 81601
_�— phone: (970) 945-7988
fax: (970) 945-8454
Z 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
May 3, 2023
Mic Mount
580 Weidman Court
Lake Oswego, Oregon 97034
micmount cr,comcast.net
Project No. 21-7-397
Subject: Observation of Excavation, Proposed Residence, Lot H19, The Homestead,
Aspen Glen Subdivision, 55 Horseshoe Lane, Garfield County, Colorado
Dear Mic:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on April 21, 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 July 2, 2021, Project No. 21-7-397.
At the time of our visit to the site, the foundation excavation had been cut in three levels from 3
to 11 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation
consisted of stiff, sandy silty clay, similar to those described in our previous report. 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 with the risk of post -construction movement mainly if the bearing
soils are wetted. 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.
Mic Mount
May 3, 2023
Page 2
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associates,
Daniel E. Hardin,
Rev. by: SLP
DEH/kac
cc: Terraverde Builders — Scott Dittman(scott(d�terraverdebuilders.com)
Kumar & Associates, Inc. ` Project No. 21-7-397