Davison County, SD Shrink-Swell Risk

Davison County's SSURGO shrink-swell reading

Moderate

In Davison County, SD, 51.8% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.27% linear extensibility on average. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

Before you rely on this for one address

Davison County's reading is an average across the whole county, not a promise about any one lot inside it. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Davison County will actually do.

Budgeting for Davison County, SD

Davison 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, Davison County, SD ranks 998 most-constrained nationally, and 62 of 66 within South Dakota. The county spans 436 square miles, home to 19,907 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. San Benito County, CA and Valley County, ID 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 Marshall County, SD and Clay County, SD. The full underlying dataset is downloadable directly, one row per county.