Day County, SD Shrink-Swell Risk

Day County's SSURGO shrink-swell reading

Moderate

In Day County, SD, 70.5% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.68% 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

Day 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 Day County.

Budgeting for Day County, SD

Day 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.

How Day County, SD compares

Among the 3,085 rated counties on this site, Day County, SD ranks 740 most-constrained nationally, and 48 of 66 within South Dakota. Day County, SD is 1,028 square miles with a population of 5,408.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Labette County, KS and Wythe County, VA 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 Corson County, SD and Roberts County, SD. The full underlying dataset is downloadable directly, one row per county.