Prairie County, MT Shrink-Swell Risk

Prairie County's SSURGO shrink-swell reading

Low

In Prairie County, MT, 69.6% of the surveyed soil carries a "Low" shrink-swell rating, 2.63% linear extensibility on average. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

Before you rely on this for one address

Prairie County's reading is an average across the whole county, not a promise about any one lot inside it. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Prairie County will actually do.

Budgeting for Prairie County, MT

Prairie County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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.

Prairie County's rank among Montana counties

Among the 3,085 rated counties on this site, Prairie County, MT ranks 1,463 most-constrained nationally, and 36 of 54 within Montana. Prairie County, MT is 1,737 square miles with a population of 1,112.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Orange County, FL and St. Louis city, 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

Elsewhere in Montana

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