Clark County, IN Shrink-Swell Risk
What Clark County, IN's soil means for a foundation
Moderate
USDA's SSURGO data puts Clark County, IN's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.12% across 53.2% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
This is a county figure, not a lot figure
USDA's survey covers the whole of Clark County, IN 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 Clark County, IN 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.
Clark County's rank among Indiana counties
Nationally, Clark County, IN is the 1,098-most-constrained of 3,085 rated counties for shrink-swell soil. Within Indiana alone it ranks 38 of 90. Clark County covers 372 square miles and counts 127,479 residents.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Rockland County, NY and Greer County, OK 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 Indiana
Every county in Indiana is on this site, including DeKalb County, IN and Perry County, IN. The full underlying dataset is downloadable directly, one row per county.