Moultrie County, IL Shrink-Swell Risk

What Moultrie County, IL's soil means for a foundation

Moderate

USDA's SSURGO data puts Moultrie County, IL's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.39% across 91.2% of the county's surveyed land. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

This is a county figure, not a lot figure

USDA's survey covers the whole of Moultrie County, IL 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 Moultrie County, IL 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.

Moultrie County's rank among Illinois counties

Nationally, Moultrie County, IL is the 412-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 9 of 101. Moultrie County covers 336 square miles and counts 14,365 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Navarro County, TX and Posey County, IN 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 Illinois

Every county in Illinois is on this site, including Pope County, IL and Lake County, IL. The full underlying dataset is downloadable directly, one row per county.