Brookings County, SD Shrink-Swell Risk

Brookings County's SSURGO shrink-swell reading

Moderate

In Brookings County, SD, 75.3% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.58% 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

Brookings 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 Brookings County.

Budgeting for Brookings County, SD

Brookings 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 Brookings County, SD compares

Among the 3,085 rated counties on this site, Brookings County, SD ranks 792 most-constrained nationally, and 53 of 66 within South Dakota. Brookings County covers 792 square miles and counts 36,359 residents.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Brooks County, GA and Polk 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 South Dakota

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