Marshall County, MS Shrink-Swell Risk

Marshall County, MS's soil, for shrink-swell risk

Low

Marshall County, MS: USDA's soil survey rates 95.4% of the county "Low" for shrink-swell potential (1.74% linear extensibility). 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.

What Marshall County's reading doesn't cover

Two lots a mile apart in Marshall County can carry different soil, even though they share one countywide reading. 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.

What it costs to find out, versus to ignore it

With Marshall County, MS 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, Marshall County, MS is the 2,230-most-constrained of 3,085 rated counties for shrink-swell soil. Within Mississippi alone it ranks 61 of 82. Marshall County, MS is 706 square miles with a population of 34,374.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Dade County, GA and Pottawattamie County, IA 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 Mississippi

Every county in Mississippi is on this site, including Claiborne County, MS and Clay County, MS. The full underlying dataset is downloadable directly, one row per county.