Walworth County, SD Shrink-Swell Risk

Walworth County's SSURGO shrink-swell reading

Moderate

In Walworth County, SD, 71.5% of the surveyed soil carries a "Moderate" shrink-swell rating, 4.63% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Walworth 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 Walworth County.

Budgeting for Walworth County, SD

Walworth 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.

Walworth County's rank among South Dakota counties

Among the 3,085 rated counties on this site, Walworth County, SD ranks 364 most-constrained nationally, and 24 of 66 within South Dakota. Walworth County covers 707 square miles and counts 5,270 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Oklahoma County, OK and Rockland County, NY 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 South Dakota

Every county in South Dakota is on this site, including Yankton County, SD and Ziebach County, SD. The full underlying dataset is downloadable directly, one row per county.