Rock County, MN Shrink-Swell Risk

Rock County, MN's soil, for shrink-swell risk

Moderate

Rock County, MN: USDA's soil survey rates 85.1% of the county "Moderate" for shrink-swell potential (4.11% 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 Rock County's reading doesn't cover

Two lots a mile apart in Rock County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Rock County will actually do.

What it costs to find out, versus to ignore it

With Rock County, MN 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.

Rock County's rank among Minnesota counties

Nationally, Rock County, MN is the 518-most-constrained of 3,085 rated counties for shrink-swell soil. Within Minnesota alone it ranks 6 of 87. Rock County covers 482 square miles and counts 9,525 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Waushara County, WI and Webster County, MS 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 Minnesota

Every county in Minnesota is on this site, including Yellow Medicine County, MN and Dakota County, MN. The full underlying dataset is downloadable directly, one row per county.