Hanson County, SD Shrink-Swell Risk

Hanson County, SD's soil, for shrink-swell risk

Moderate

Hanson County, SD: USDA's soil survey rates 63.7% of the county "Moderate" for shrink-swell potential (3.48% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Hanson County's reading doesn't cover

Two lots a mile apart in Hanson County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Hanson County will actually do.

What it costs to find out, versus to ignore it

With Hanson County, SD 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.

Hanson County's rank among South Dakota counties

Nationally, Hanson County, SD is the 860-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Dakota alone it ranks 58 of 66. Hanson County, SD is 435 square miles with a population of 3,477.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Essex County, NY and Madison County, GA 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 South Dakota

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