Carbon County, UT Shrink-Swell Risk

What Carbon County, UT's soil means for a foundation

Low

USDA's SSURGO data puts Carbon County, UT's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.32% across 72.4% 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 Carbon 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 Carbon County will actually do.

Report cost vs. repair cost

With Carbon 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, Carbon County, UT is the 1,710-most-constrained of 3,085 rated counties for shrink-swell soil. Within Utah alone it ranks 16 of 29. Carbon County, UT is 1,479 square miles with a population of 20,613.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Wayne County, KY and Strafford County, NH 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 Iron County, UT and Piute County, UT. The full underlying dataset is downloadable directly, one row per county.