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HEPWORTH - PAWLAK GEOTECHNICAL
January 11, 2012
Peter Robson
73 Corral Drive
Carbondale, Colorado 81623
rcdcon@yahoo.com
Hepworth-Pawlak Geotechnical, Inc.
5020 County Road 154
Glenwood Springs, Colorado 81601
Phone: 970-945-7988
Fax: 970.945-8454
email: hpgeo@lipkeorech.com
Job No. 1 1 1 348A
Subject: Observation of Excavation, Proposed Residence, Lot E-8, Aspen
Equestrian Estates, Equestrian Way, Garfield County, Colorado
Dear Mr. Robson:
As requested, a representative of Hepworth-Pawlak Geotechnical, Inc. observed the
excavation at the subject site on January 11, 2012 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 9, 2011, Job No. 111 348A.
At the time of our visit to the site, the foundation excavation had been cut in one level
from 3 to 5 feet below the adjacent ground surface. The soils exposed in the bottom of
the excavation consisted of slightly silty sandy gravel with cobbles. No free water was
encountered in the excavation and the soils were moist. Excavation of the main house
area was complete and excavation of the garage area was almost complete at the time of
our site visit. Other areas of the excavation subgrade were being protected from frost
with insulating blankets.
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 2,000 psf. Loose and disturbed soils should
be compacted or removed in the footing areas to expose the undisturbed natural soils.
The bearing soils should be protected from frost and concrete should not be placed on
frozen soils. Other recommendations presented in our previous report which are
applicable should also be observed.
Parker 303-841-7119 • Colorado Springs 719-633-5562 • Silverthorne 970-468-1989
January 11, 2012
Page 2
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 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,
HEPWORTH — PAWLAK GEOTCHNICAL, INC.
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Daniel E. Hardin, P.
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Job No. 111 348A
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