Polk County, AR Shrink-Swell Risk

Polk County's SSURGO shrink-swell reading

Low

In Polk County, AR, 84.3% of the surveyed soil carries a "Low" shrink-swell rating, 1.62% linear extensibility on average. 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.

Before you rely on this for one address

Polk County's reading is an average across the whole county, not a promise about any one lot inside it. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Polk County.

Budgeting for Polk County, AR

Polk County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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

Among the 3,085 rated counties on this site, Polk County, AR ranks 2,364 most-constrained nationally, and 73 of 75 within Arkansas. Polk County covers 857 square miles and counts 19,434 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Crook County, OR and Wasco County, OR 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

Elsewhere in Arkansas

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