Sinkhole risk in Calloway County, KY: 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: 3%
At or near the surface: 3%
Buried under cover: 0%

The next step for one property

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

That works out to roughly 10 of Calloway County's 385 square miles on soluble rock, 10 of them with the rock at or near the surface. With about 38,975 residents (101 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 379 map points about 1.0 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 Calloway County

The nearest county rated sinkhole country is Trigg County, KY, about 26 miles northeast, close enough that the same rock may run under the county line. None of the 6 closest counties land in the same band, so Calloway County stands out from its surroundings.

Marshall County, KY 18 mi north · under 1% at surface
Henry County, TN 20 mi south · under 1% at surface
Graves County, KY 22 mi west · 0% at surface
Trigg County, KY 26 mi northeast · 75% at surface
Stewart County, TN 29 mi southeast · 71% at surface
Lyon County, KY 30 mi north · 58% at surface

The rock underneath

The largest mapped soluble unit here is the Warsaw Limestone (limestone), Mississippian in age, covering about 3% of the county.

Against the rest of Kentucky

Calloway County ranks 86 of 120 in Kentucky for soluble rock at the surface, and sits above 59% of US counties on that measure.