Gibson County, TN Shrink-Swell Risk

What Gibson County, TN's soil means for a foundation

Low

USDA's SSURGO data puts Gibson County, TN's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.53% across 96.8% 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 Gibson County, TN 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 Gibson County will actually do.

Report cost vs. repair cost

With Gibson County, TN 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, Gibson County, TN is the 2,462-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 77 of 95. Gibson County covers 603 square miles and counts 51,422 residents.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Oregon County, MO and Crosby County, TX 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 Tennessee

Every county in Tennessee is on this site, including Decatur County, TN and Hamblen County, TN. The full underlying dataset is downloadable directly, one row per county.