Conway County, AR Shrink-Swell Risk
What Conway County, AR's soil means for a foundation
Low
USDA's SSURGO data puts Conway County, AR's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.08% across 79.1% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.
This is a county figure, not a lot figure
USDA's survey covers the whole of Conway County, AR at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Conway County will actually do.
Report cost vs. repair cost
With Conway County, AR rating "Low", 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.
Conway County's rank among Arkansas counties
Nationally, Conway County, AR is the 1,906-most-constrained of 3,085 rated counties for shrink-swell soil. Within Arkansas alone it ranks 57 of 75. Conway County, AR is 552 square miles with a population of 21,422.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Mercer County, MO and Powhatan County, VA 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 Chicot County, AR and Clark County, AR. The full underlying dataset is downloadable directly, one row per county.