HomeMy WebLinkAboutObservation of Excavation 07.13.2021An Employrc Oryncd Compony
5020 County Roacl 154
Glenwoocl Springs, CO 81ó0i
phone: (970) 945-7988
fax: (970) 945-8454
ernail : kaglenwood@kumarusa.corn
wwrv.kumarusa"com
OfIìce l¡cations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit Counfy, Colorado
July l3,2Ù2l
Mike Perdue
P.O. Box 476
Parachute, Colorado 81 635
perduecesm@msn.csm
Project No. 20-7-416
Subject:Observation of Excavation, Proposed Shop, 357 County Road 309,
Parachute/Rulison Road, Garfi eld Count5r, Colorado
Dear Mike:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on July 12, 2021to 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 Septembæ 23,2020, Project No. 20-7'416.
The shop will be a 60 foot by 100 foot, steel frame structure with a slab-on-grade floor
At the time of our visit to the site, the perimeter footing trench excavation had been cut in two
levels from 3 to 9 feet below the exterior adjacent ground surface. The soils exposed in the
bottom of the excavation consisted of stiffsandy to clayey silt. No free water was encountered
in the excavation and the soils were slightly moist. Footing forms were in place.
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 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
Mike Perdue
July 13,2021
Page2
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.
If you have any questions or need further assistance, please call our office.
Sincerely,
Kumar & Associateso Inc.
Daniel E. Hardin,
Rev. by: SLP
DEH/kac
Kumar & Associates, lnc. @ Proiect No. 20-7.416