Sinkhole risk in Carroll County, MO: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 6%
At or near the surface: 0%
Buried under cover: 6%

What to do about a house in Carroll County

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 41 of Carroll County's 695 square miles on soluble rock. With about 8,414 residents (12 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 289 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why the 6% under cover still counts, and how these percentages are measured.

Counties around Carroll County

The nearest county rated sinkhole country is Pettis County, MO, about 50 miles south. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Livingston County, MO 24 mi north · 0% at surface
Saline County, MO 26 mi southeast · 10% at surface
Ray County, MO 28 mi west · 0% at surface
Chariton County, MO 29 mi east · 0% at surface
Lafayette County, MO 30 mi southwest · 32% at surface
Caldwell County, MO 30 mi northwest · 0% at surface

Which formation it is

The largest mapped soluble unit here is the Kansas City Group (limestone), Late Pennsylvanian-Upper Series-Missourian Stage in age, covering about 6% of the county.

Against the rest of Missouri

Carroll County ranks 82 of 115 in Missouri for soluble rock at the surface, and sits above 0% of US counties on that measure.