Logan County, AR Shrink-Swell Risk

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

Low

USDA's SSURGO data puts Logan County, AR's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.01% across 79% of the county's surveyed land. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

This is a county figure, not a lot figure

USDA's survey covers the whole of Logan 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 Logan County will actually do.

Report cost vs. repair cost

With Logan 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.

Where this sits nationally

Nationally, Logan County, AR is the 1,974-most-constrained of 3,085 rated counties for shrink-swell soil. Within Arkansas alone it ranks 59 of 75. Logan County, AR is 709 square miles with a population of 21,457.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Hand County, SD and Trempealeau County, WI 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 Sevier County, AR and Miller County, AR. The full underlying dataset is downloadable directly, one row per county.