Hardin County, TN Shrink-Swell Risk

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

Low

USDA's SSURGO data puts Hardin County, TN's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.11% across 82% of the county's surveyed land. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

This is a county figure, not a lot figure

USDA's survey covers the whole of Hardin County, TN at once, not any single address. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Hardin County.

Report cost vs. repair cost

With Hardin 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.

Hardin County's rank among Tennessee counties

Nationally, Hardin County, TN is the 1,884-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 45 of 95. The county spans 577 square miles, home to 27,617 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Marion County, TX and Paulding County, OH 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 Wayne County, TN and Blount County, TN. The full underlying dataset is downloadable directly, one row per county.