HomeMy WebLinkAboutObservation of Excavation 10.03.2022LKP Engineeringo Inc.
CTVIL/GEOTECHMCAL
October 3,2022
Brent Scott
P.O. Box 5559
Eagle, CO 81631
Brent. S cott@mountainbeverage. com
RE: Open Hole Observation
Main House - 4C Ranch
9023 County Road 312, New Castle
Garfield County, Colorado
Project No. 22-3619
Dear Brent,
At the request of Pat Brown and Jeff Beaumont, Beaumont Excavating, Inc., on
September 2l and29,2022, we visited the construction site for the proposed main residence on
your ranch - 4C Ranch,at9023 County Road 312, New Castle, Garfield County, Colorado. The
pu{pose of our site visits was to observe the soils exposed in the foundation excavations for the
proposed main residence and to observe the compaction of the structural fil1by proof-rolling, in
accordance with the recommendations of the Revised Soil and Foundation Investigation Report,
nnder the same project number, dated August 8,2022.
The bench for the foundation excavation was about 40 feet by 70 feet, with an additional
5+ feet on the exterior of the foundation. The foundation excavation was overexcavated four feet
for the placement of the structural fill. The soil exposed at the bottom of the foundation
excavation consisted of moist, brown, silty-sandy clay with gravel. Around the excavation were
large piles of excavated cobbles and large boulders that were excavated from the foundation
excavation.
The structural fill consisted of an initial, 6-inch layer of minus 3-inch road base covered
with the first layer of Tensar TriAX TX140 Geogrid, followed by two, 9-inch layers of minus 3-
inch road base, covered with geogrid, another two, 9-inch layers of minus 3-inch road base,
covered with geogrid with a final 6-inch layer of minus 3-inch road base.
The only equipment available forproofing the compaction of the strucfural fill was Link
Belt Trackhoe 210 lx with alarge bucket. 'We observed the compaction test after the fîrst set of
two, f-inch lifts were constructed. Photographs and videos were sent to us by Jeff from the
P.O. Box 724,Eagle, CO 81631 www.LKPEnginee!¡g.com
4C Ranch - Main House
Page2 of 2
October 3,2022
Project No. 22-3619
remainder of the structural fill construction and testing. Soft spots were not observed or reported.
The soil exposed in thefoundation excavation is suitableþr the recommended design
bearing pressure of 2000 psf
We recommend compliance with the recommendations of the above-named soils report
during the remainder of the construction, specifically with the sections on drainage, grading and
irrigation.
This report has been prepared according to locally accepted Professional Geotechnical
Engineering standards for similar methods of testing and soil conditions at this time. The
findings and recommendation stated above are based on the soil conditions observed and tested
in the foundation excavation onIy. There is no other warcanty either expressed or implied.
If you have any questions, please do not hesitate to call.
Sincerely,
LKP Engineering,Inc.
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P.O. Box 724,Eagle, CO 81631 www.LKPEngineering.com