Marshall County, TN Shrink-Swell Risk

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

Moderate

USDA's SSURGO data puts Marshall County, TN's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.81% across 52.4% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

This is a county figure, not a lot figure

USDA's survey covers the whole of Marshall 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 Marshall County.

Report cost vs. repair cost

With Marshall County, TN rating "Moderate", 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, Marshall County, TN is the 672-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 5 of 95. Marshall County, TN is 375 square miles with a population of 37,847.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Early County, GA and Jackson County, OR 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 Hardeman County, TN and Perry County, TN. The full underlying dataset is downloadable directly, one row per county.