Sinkhole risk in Richland County, MT: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

What to do about a house in Richland County

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 2,085 square miles, under one square mile of Richland County maps onto soluble rock. With about 11,028 residents (5 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 272 map points about 2.8 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Richland County

The nearest county rated sinkhole country is Fall River County, SD, about 319 miles south. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Dawson County, MT 39 mi southwest · 0% at surface
Roosevelt County, MT 40 mi northwest · 0% at surface
McKenzie County, ND 54 mi east · 0% at surface
McCone County, MT 57 mi west · 0% at surface
Wibaux County, MT 58 mi south · 0% at surface
Williams County, ND 63 mi northeast · 0% at surface

Against the rest of Montana

Richland County ranks 49 of 56 in Montana for soluble rock at the surface, and sits above 0% of US counties on that measure.