Clinton County, IL Shrink-Swell Risk

Clinton County, IL's soil, for shrink-swell risk

Moderate

Clinton County, IL: USDA's soil survey rates 78.2% of the county "Moderate" for shrink-swell potential (4.02% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Clinton County's reading doesn't cover

Two lots a mile apart in Clinton 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 Clinton County.

What it costs to find out, versus to ignore it

With Clinton 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.

Clinton County's rank among Illinois counties

Nationally, Clinton County, IL is the 552-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 29 of 101. Clinton County, IL is 474 square miles with a population of 37,087.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Baca County, CO and Washington County, TX 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 McDonough County, IL and Jefferson County, IL. The full underlying dataset is downloadable directly, one row per county.