McCook County, SD Shrink-Swell Risk

McCook County's SSURGO shrink-swell reading

Moderate

In McCook County, SD, 47.5% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.65% linear extensibility on average. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

Before you rely on this for one address

McCook 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 McCook County.

Budgeting for McCook County, SD

McCook 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 McCook County, SD compares

Among the 3,085 rated counties on this site, McCook County, SD ranks 762 most-constrained nationally, and 50 of 66 within South Dakota. McCook County, SD is 574 square miles with a population of 5,771.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. El Dorado County, CA and Sussex County, NJ 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 Codington County, SD and Aurora County, SD. The full underlying dataset is downloadable directly, one row per county.