Sinkhole risk in Campbell County, SD: 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 Campbell County

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

Across 734 square miles, under one square mile of Campbell County maps onto soluble rock. With about 1,342 residents (2 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 330 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Campbell County

The nearest county rated sinkhole country is Boyd County, NE, about 209 miles south. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Walworth County, SD 25 mi south · 0% at surface
McIntosh County, ND 34 mi northeast · 0% at surface
Emmons County, ND 36 mi north · 0% at surface
McPherson County, SD 38 mi east · 0% at surface
Edmunds County, SD 46 mi southeast · 0% at surface
Potter County, SD 51 mi south · 0% at surface

Against the rest of South Dakota

Campbell County ranks 19 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.