Sinkhole risk in Ziebach 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 this means before you buy

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

Across 1,961 square miles, under one square mile of Ziebach County maps onto soluble rock. With about 2,418 residents (1 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 284 map points about 2.6 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 Ziebach County

The nearest county rated sinkhole country is Fall River County, SD, about 153 miles southwest. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Dewey County, SD 42 mi east · 0% at surface
Haakon County, SD 49 mi south · 0% at surface
Perkins County, SD 52 mi northwest · 0% at surface
Corson County, SD 53 mi northeast · 0% at surface
Meade County, SD 58 mi southwest · 3% at surface
Stanley County, SD 60 mi southeast · 0% at surface

Against the rest of South Dakota

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