Henry County, IL Shrink-Swell Risk

Shrink-swell potential in Henry County, IL

Moderate

Soil across 75.4% of Henry County, IL comes back "Moderate" in USDA's shrink-swell data, averaging 3.68% linear extensibility. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Henry County, IL - never a reading for one specific parcel. 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 Henry County.

Henry County: the real numbers

Henry County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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.

How Henry County, IL compares

Among the 3,085 rated counties on this site, Henry County, IL ranks 735 most-constrained nationally, and 46 of 101 within Illinois. The county spans 823 square miles, home to 48,177 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Humboldt County, CA and Pettis County, MO 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

Elsewhere in Illinois

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