Oglala Lakota County, SD Shrink-Swell Risk

Oglala Lakota County, SD's soil, for shrink-swell risk

Moderate

Oglala Lakota County, SD: USDA's soil survey rates 60% of the county "Moderate" for shrink-swell potential (3.59% linear extensibility). 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.

What Oglala Lakota County's reading doesn't cover

Two lots a mile apart in Oglala Lakota County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

What it costs to find out, versus to ignore it

With Oglala Lakota 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.

How Oglala Lakota County, SD compares

Nationally, Oglala Lakota County, SD is the 787-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Dakota alone it ranks 51 of 66. The county spans 2,094 square miles, home to 13,360 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Mineral County, WV and White County, IN 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 Jerauld County, SD and Charles Mix County, SD. The full underlying dataset is downloadable directly, one row per county.