Niobrara County, WY Shrink-Swell Risk

What Niobrara County, WY's soil means for a foundation

Low

USDA's SSURGO data puts Niobrara County, WY's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.94% across 60.8% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

This is a county figure, not a lot figure

USDA's survey covers the whole of Niobrara County, WY at once, not any single address. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Niobrara County.

Report cost vs. repair cost

With Niobrara County, WY rating "Low", 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.

Niobrara County's rank among Wyoming counties

Nationally, Niobrara County, WY is the 1,239-most-constrained of 3,085 rated counties for shrink-swell soil. Within Wyoming alone it ranks 8 of 23. Niobrara County covers 2,626 square miles and counts 2,301 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Stearns County, MN and Scotland County, 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

More of Wyoming

Every county in Wyoming is on this site, including Albany County, WY and Sheridan County, WY. The full underlying dataset is downloadable directly, one row per county.