Faulk County, SD Shrink-Swell Risk

What Faulk County, SD's soil means for a foundation

Moderate

USDA's SSURGO data puts Faulk County, SD's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.82% across 88.5% of the county's surveyed land. 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.

This is a county figure, not a lot figure

USDA's survey covers the whole of Faulk County, SD at once, not any single address. 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 Faulk County.

Report cost vs. repair cost

With Faulk 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.

Faulk County's rank among South Dakota counties

Nationally, Faulk County, SD is the 671-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Dakota alone it ranks 41 of 66. The county spans 982 square miles, home to 2,136 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Casey County, KY and Dent County, MO 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 Yankton County, SD and Grant County, SD. The full underlying dataset is downloadable directly, one row per county.