Christian County, IL Shrink-Swell Risk

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

Moderate

USDA's SSURGO data puts Christian County, IL's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.81% across 94.8% of the county's surveyed land. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

This is a county figure, not a lot figure

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

Report cost vs. repair cost

With Christian 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.

Where this sits nationally

Nationally, Christian County, IL is the 329-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 3 of 101. Christian County, IL is 709 square miles with a population of 33,247.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Tarrant County, TX and Union County, KY 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 Edwards County, IL and Pulaski County, IL. The full underlying dataset is downloadable directly, one row per county.