Duchesne County, UT Shrink-Swell Risk
What Duchesne County, UT's soil means for a foundation
Low
USDA's SSURGO data puts Duchesne County, UT's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.91% across 84.4% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.
This is a county figure, not a lot figure
USDA's survey covers the whole of Duchesne County, UT at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Duchesne County will actually do.
Report cost vs. repair cost
With Duchesne County, UT rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.
Where this sits nationally
Nationally, Duchesne County, UT is the 2,063-most-constrained of 3,085 rated counties for shrink-swell soil. Within Utah alone it ranks 27 of 29. The county spans 3,236 square miles, home to 20,803 people.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Tippecanoe County, IN and Barbour County, WV are worth a look for comparison.
How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil
More of Utah
Every county in Utah is on this site, including Weber County, UT and Beaver County, UT. The full underlying dataset is downloadable directly, one row per county.