Sinkhole risk in McPherson 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%

The next step for one property

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

Across 1,137 square miles, under one square mile of McPherson County maps onto soluble rock. With about 2,307 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 408 map points about 1.7 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 McPherson County

The nearest county rated sinkhole country is Boyd County, NE, about 201 miles south. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

McIntosh County, ND 24 mi northwest · 0% at surface
Edmunds County, SD 26 mi south · 0% at surface
Campbell County, SD 38 mi west · 0% at surface
Dickey County, ND 41 mi northeast · 0% at surface
Brown County, SD 44 mi east · 0% at surface
Walworth County, SD 47 mi southwest · 0% at surface

Against the rest of South Dakota

McPherson County ranks 48 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.