Treasure County, MT Shrink-Swell Risk

What Treasure County, MT's soil means for a foundation

Moderate

USDA's SSURGO data puts Treasure County, MT's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.53% across 37.3% 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 Treasure County, MT at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Treasure County will actually do.

Report cost vs. repair cost

With Treasure 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.

Treasure County's rank among Montana counties

Nationally, Treasure County, MT is the 381-most-constrained of 3,085 rated counties for shrink-swell soil. Within Montana alone it ranks 5 of 54. Treasure County, MT is 978 square miles with a population of 739.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Madison County, IL and Latah County, ID 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 Big Horn County, MT and Carter County, MT. The full underlying dataset is downloadable directly, one row per county.