Gallatin County, IL Shrink-Swell Risk

Gallatin County's SSURGO shrink-swell reading

Moderate

In Gallatin County, IL, 48.2% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.58% linear extensibility on average. 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.

Before you rely on this for one address

Gallatin County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Gallatin County.

Budgeting for Gallatin County, IL

Gallatin 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Gallatin County, IL ranks 794 most-constrained nationally, and 55 of 101 within Illinois. The county spans 323 square miles, home to 4,690 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Rusk County, WI and Clinton 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

Elsewhere in Illinois

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