HomeMy WebLinkAboutObservation of Excavation 06.22.2026CTL THOMPSON
June 22, 2026
Andy Frantz
730 East 5th Street
Rifle, CO 81650
Attention: Andy Frantz
Subject: Footing Subgrade Observation
Frantz Residence
1711 County Road 331
Garfield County, Colorado
Project No. GS07096.00OF-305-1_1
CTLIThompson, Inc. (CTLIT) visited 1711 County Road 331 on June 22, 2026, The pur-
pose of our site visit was to observe the footing subgrade soils in the foundation excavation for
the residence. The soils exposed at proposed footing elevation consist of natural, sandy clays
with scattered gravels, and are consistent with the soils encountered during our geotechnical
investigation. Photographs taken at the time of our site visit are attached.
CTLIT performed a geotechnical engineering investigation for 1711 County Road 331
(Project No. GS07096.000-120; report dated April 30, 2026). Our report recommended that the
footings should be supported by the undisturbed, natural, sandy clay soil or densely compacted,
granular, structural fill.
Based on our observations, we judge the natural soils exposed at proposed footing
grade are suitable for support of footings designed for a maximum allowable bearing pressure of
1,200 psf.
We are available to discuss the contents of this letter. Please contact us if you have
questions or need additional information.
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CTLITHOMPSON, INC �5.. Reviewedby:
Thomas Downing
Lab & Field Manager
tdowning(d_)ctlthompson.com
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Attachments: Figures 1-4, Site Photographs
Via email: afrantz4(cD_msn.com
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James A. Parker, P.E., P.G.
Principal Engineer
iaparker .ctlthompson.com
CTLJThompson, Inc.
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