Roosevelt County, MT Shrink-Swell Risk

Roosevelt County, MT's soil, for shrink-swell risk

Moderate

Roosevelt County, MT: USDA's soil survey rates 59.9% of the county "Moderate" for shrink-swell potential (3.23% 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 Roosevelt County's reading doesn't cover

Two lots a mile apart in Roosevelt 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 Roosevelt County will actually do.

What it costs to find out, versus to ignore it

With Roosevelt County, MT 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.

Where this sits nationally

Nationally, Roosevelt County, MT is the 1,027-most-constrained of 3,085 rated counties for shrink-swell soil. Within Montana alone it ranks 32 of 54. Roosevelt County covers 2,355 square miles and counts 10,197 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Randolph County, AR and Schley County, GA 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 Montana

Every county in Montana is on this site, including Broadwater County, MT and Musselshell County, MT. The full underlying dataset is downloadable directly, one row per county.