Copiah County, MS Shrink-Swell Risk

What Copiah County, MS's soil means for a foundation

Low

USDA's SSURGO data puts Copiah County, MS's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.62% across 82.2% of the county's surveyed land. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

This is a county figure, not a lot figure

USDA's survey covers the whole of Copiah County, MS 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 Copiah County will actually do.

Report cost vs. repair cost

With Copiah 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.

Copiah County's rank among Mississippi counties

Nationally, Copiah County, MS is the 1,466-most-constrained of 3,085 rated counties for shrink-swell soil. Within Mississippi alone it ranks 30 of 82. The county spans 777 square miles, home to 27,536 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Jones County, GA and Monroe County, FL 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 Grenada County, MS and Attala County, MS. The full underlying dataset is downloadable directly, one row per county.