Clay County, AR Shrink-Swell Risk
Clay County, AR's soil, for shrink-swell risk
Moderate
Clay County, AR: USDA's soil survey rates 65.3% of the county "Moderate" for shrink-swell potential (4.01% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
What Clay County's reading doesn't cover
Two lots a mile apart in Clay County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
What it costs to find out, versus to ignore it
With Clay 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, Clay County, AR is the 560-most-constrained of 3,085 rated counties for shrink-swell soil. Within Arkansas alone it ranks 22 of 75. Clay County covers 639 square miles and counts 14,112 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Lowndes County, GA and Ashland County, OH 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 Mississippi County, AR and Ashley County, AR. The full underlying dataset is downloadable directly, one row per county.