Clark County, AR Shrink-Swell Risk

What Clark County, AR's soil means for a foundation

Moderate

USDA's SSURGO data puts Clark County, AR's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.09% across 55.2% of the county's surveyed land. 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.

This is a county figure, not a lot figure

USDA's survey covers the whole of Clark County, AR 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, AR 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, Clark County, AR is the 1,127-most-constrained of 3,085 rated counties for shrink-swell soil. Within Arkansas alone it ranks 35 of 75. Clark County, AR is 866 square miles with a population of 20,920.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Irwin County, GA and Owyhee County, ID 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 Arkansas

Every county in Arkansas is on this site, including Jefferson County, AR and Howard County, AR. The full underlying dataset is downloadable directly, one row per county.