Lewis County, TN Shrink-Swell Risk

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

Low

USDA's SSURGO data puts Lewis County, TN's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.44% across 100% 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 Lewis County, TN at once, not any single address. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Report cost vs. repair cost

With Lewis 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.

How Lewis County, TN compares

Nationally, Lewis County, TN is the 2,576-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 84 of 95. Lewis County covers 282 square miles and counts 13,418 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Gove County, KS and Escambia County, AL 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 Monroe County, TN and Scott County, TN. The full underlying dataset is downloadable directly, one row per county.