HomeMy WebLinkAboutObservation of Excavation 07.03.2023GRA02490- OOOIND JUNCTION
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'rftr f LINCOLN DeVORE, Inc.
GEOTECIlNICAL ENGINEERS - GEOLOGISTS
2191 Canyon Ct. W.
Grand Junction, CO 81507 Cell: (970) 260-3332
E-Mail: gildcm(d carthlink_nct
Mr. Tyler DiDonato July 3, 2023
Shining Light Services
P.O. Box 75%
Fruita, Colorado 81521
Re: Foundation Observations, Garfield County Building Permit # BLRE-03-23-8044,
224 Limberpine Circle, Battlement Mesa, Colorado
Mr. DiDonato:
Edward M. Morris, P.E. of Grand Junction Lincoln DeVore, examined the open excavation on this site on 5-
26-2023. In -place probing and soil density testing of the reworked subgrade soils was performed. The in -
place soil densities were found to range from 106 to 109 pounds per cubic foot. These soils are similar to the
surface soils described in the Huddleston-Berry Engineering & Testing, LLC, Report of Geotechnical
Investigation for this site, Project #02490-0001, dated June 21, 2022. The reworked subgrade soils were
judged to be capable of supporting the structural fill. It was determined that a geotextile fabric for either
separation or reinforcement was not required.
Rex Goodrich, P.E. representing Grand Junction Lincoln DeVore, observed the recently placed structural fill
on the above -referenced site on 6-3-2023. The structural fill was found to consist of approximately 12 inches
of reworked native clayey silty and 12 inches of imported gravelly sand (ABC). In -place soil density tests
taken on the structural fill indicated that compaction was either equal to or in excess of 90% of the modified
proctor density (ASTM D-1557) for these materials. The structural fill appears to meet the minimum
recommendations in the Report of Geotechnical Investigation performed by Huddleston-Berry Engineering
& Testing, LLC and the foundation design prepared by Grand Junction Lincoln DeVore.
At the request of Mr. DiDonato, the foundation concrete footing was checked for the maximum allowable
bearing and the minimum allowable width. Assuming the Foundation Loads are to be computed as Dead Load
+'/2 Live Load, the maximum allowable bearing will be 1500 psf for the soils, the minimum footing width
would be 12" wide, producing a footing bearing range of 862psf to 1338 psf for the main load -bearing walls.
The GJLD Foundation Design a minimum 14" wide footing as as that dimension is typically required to set
a wide variety of concrete forms for an 8" stemwall. If construction allows the 12" wide footing, than Edward
M. Moms, P.E. of Grand Junction Lincoln DeVore, Inc. will allow it for this structure.
We hope this letterhas provided you with the information required. If questions arise, or if further information
is needed, please feel free to contact Grand Junction Lincoln DeVore at any time.
Respectfully submitted, Z�vdn1
GRAND JUNCTION r�
LINCOLN DeVORE, INC. N w C" 5
by: Edward "orris-, P.E.
Principal Engineer
GJLD Job No. 95758-GJ