HomeMy WebLinkAboutSoil Investigation Report 11.04.2013CIVCO Engineering, Inc
Civil Engineering Consultants
P.O. Box 1758
365 West 50 North, Suite W-1
Vernal, Utah 84078
November 4, 2013
Richard Ruse
Clayton Homes
2394 Hwy 6 & 50
Grand Junction, CO 81505
Dear Shawn,
Subject: Soil Investigation — Bagley residence in Garfield County, Colorado
I am writing this letter to report the findings of a soil investigation that was conducted at the proposed
site for the new Bagley residence that is to be built in Garfield County, Colorado. The investigation
entailed the analysis of one soil sample that was taken from the proposed construction site at
approximately the bearing depth of the proposed foundation. Testing of the soil sample included a
sieve analysis and Atterberg Limits testing. The results of the soil testing were used to classify the soil
sample as sandy silt, or 'ML' soil according to the Unified Soil Classification System. Copies of the soil
data are included with this letter.
ML soils are sandy silts of low plasticity having nominal bearing capacities in the vicinity of 3000 psf for
medium to stiff soils. Erring on the side of caution, I recommend that foundations be designed using a
soil bearing capacity of 2000 psf.
Though no specific testing was done to precisely determine the expansion potential of the soil sample,
the Atterberg Limits test results indicate a non -expansive soil. A liquid limit of 50 or less is indicative of
a low degree of expansion. The tested soil sample had a liquid limit of 19. A plasticity index of 25 or
less is also indicative of a low degree of expansion. The sample was determined to be non -plastic.
Though the Atterberg Limits testing suggests a non -expansive soil, ML soils may be susceptible to frost
heave. Foundations should extend to below frost depth or be frost -protected by some other means.
Water should be kept away from the foundations. Walkways, driveways, and ground surfaces should
be graded to flow away from the foundation. Gutter down -spout outlets should be kept at least five feet
away from the foundation. Vegetation requiring significant watering should not be planted near the
foundation.
This concludes my report of the soil conditions at the site of the Bagley residence to be constructed in
Garfield County, Colorado. If you ;.;-,,;-stions regarding this report, please let me know.
Sincerely,
Vance V. King, PE
Engineer
CIVCO Engineering, Inc.
Enclosure
Cc: Project File
Phone (435)789-5448 * Fax (435)789-4485
Email: vanceking@civcoengineering.com