Sinkhole risk in Walworth 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 707 square miles, under one square mile of Walworth County maps onto soluble rock. With about 5,270 residents (7 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 319 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: how these percentages are measured, and the warning signs that apply anywhere.
Counties around Walworth County
The nearest county rated sinkhole country is Boyd County, NE, about 186 miles south. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.
- Campbell County, SD 25 mi north · 0% at surface
- Potter County, SD 26 mi south · 0% at surface
- Edmunds County, SD 40 mi east · 0% at surface
- Dewey County, SD 44 mi southwest · 0% at surface
- McPherson County, SD 47 mi northeast · 0% at surface
- Sully County, SD 49 mi south · 0% at surface
Against the rest of South Dakota
Walworth County ranks 64 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.
- Lawrence County 42%
- Fall River County 37%
- Custer County 30%
- Gregory County 17%
- Pennington County 13%