Grant County, SD Shrink-Swell Risk

Grant County's SSURGO shrink-swell reading

Moderate

In Grant County, SD, 67.1% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.8% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Grant 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 Grant County will actually do.

Budgeting for Grant County, SD

Grant 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 Grant County, SD compares

Among the 3,085 rated counties on this site, Grant County, SD ranks 677 most-constrained nationally, and 42 of 66 within South Dakota. Grant County, SD is 681 square miles with a population of 7,618.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Grant County, KS and Obion County, TN 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 McCook County, SD and Meade County, SD. The full underlying dataset is downloadable directly, one row per county.