HomeMy WebLinkAboutObservation of Excavation 09.29.2022lGrt#ffiåffi*ffii#ü'-"
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5020 Counfy Road I 54
Glenwootl Springs, CO 8i601
phone: (970) 945-7988
fax: (970) 945-8454
email : kaglenrvood@kurnanrsa.com
www.kuruarusa.cqlnAn Employec Otmod Compsny
Ofïice L¡sations: Denver {HQ), Parker, Cìolorado Springs, Fort Collins. Clenrvood Springs, and Sunrmit Count-v, Colorado
September 29,2022
Crystal Constructors
Att¡r: John Placek
68 Scutter Ridge Road
Rifle, Colorado 81650
crvstal const(¿usonris.net
Project No.22-7-622
Subject: Observati'on of Excavation, Proposed Residence, 284 Wood Nymph Road, Lot4,
Filing 6, Elk Springs Subdivision, Garfield County, Colorado
Dear Mr. Placek:
As requested, a representative of Kumar & Associates, Inc. observed the excavation at the
subject site on September 20,2022 to evaluate the soils exposed for foundation support. The
findings of our observations and recommendations for the foundation design are presented in this
report. H-P Geotech previously conducted a subsoil study for design of foundations at the site
and presented their findings in a report dated May 25,2006, Project No. 106-463.
At the time of our visit to the site, the foundation excavation had been cut in four levels from2Yz
to 6 feet below the adjacent ground surface. The soils exposed in the bottom ofthe excavation
consisted of basalt rocks with a whitish, silty sand matrix. 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 2,500 psf. Loose and disturbed soils should be removed in the footing areas
to expose the undisturbed natural basalt rock 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
contaminants (MOBC) developing in the frrture. 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,
Kurnar & Associates, Inc.
s
Daniel E. Hardin, P.E.
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