SinkholeOdds

Sinkhole risk in Stanley 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 1,444 square miles, under one square mile of Stanley County maps onto soluble rock. With about 3,015 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 590 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Stanley County

The nearest county rated sinkhole country is Boyd County, NE, about 144 miles southeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Against the rest of South Dakota

Stanley County ranks 59 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.