Sinkhole risk in Rock County, MN: 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 482 square miles, under one square mile of Rock County maps onto soluble rock. With about 9,525 residents (20 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 399 map points about 1.1 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 Rock County

The nearest county rated sinkhole country is Knox County, NE, about 109 miles southwest. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Lyon County, IA 20 mi south · 0% at surface
Pipestone County, MN 24 mi north · 0% at surface
Nobles County, MN 25 mi east · 0% at surface
Minnehaha County, SD 27 mi west · 0% at surface
Moody County, SD 31 mi northwest · 0% at surface
Murray County, MN 35 mi northeast · 0% at surface

Against the rest of Minnesota

Rock County ranks 69 of 87 in Minnesota for soluble rock at the surface, and sits above 0% of US counties on that measure.