HomeMy WebLinkAboutOpen Hole Soils InspectionSeptember 29, 2015
Garfield County Building Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
RE: Open Hole Soils Inspection For 621 Elk Run Road, New Castle, CO
To Whom It May Concern:
The assumed soils for design purposes for the addition at the Whitaker Residence were Clayey Gravel
with an associated presumptive allowable bearing pressure of 2000 psf. Presumptive load-bearing values
shall apply to materials with similar physical characteristics and dispositions.
At the time of inspection by the undersigned, the foundation excavation was complete and the footing
sub -grade was prepared for placement of concrete. The soils observed were classified as Clayey Gravel
with numerous Sedimentary Cobble (6"-12") and Boulder (>12") present. The Clayey Gravel has
presumptive load-bearing values of 2000 psf for vertical foundation pressure and 150 psf/ft for Iateral
bearing pressure. The sedimentary rock has presumptive Ioad-bearing values of 4000 psf for vertical
foundation pressure and 400 psf/ft for lateral bearing pressure.
The observed material was as expected and as assumed for design purposes. Based on the open -hole soils
inspection the material observed supports the load-bearing assumptions used by the structural engineer for
design purposes.
If you have any questions, please feel free to give me a call at (970) 618-0373.
Sincerely,
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Bryan K. Whitaker
REGI
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