Sinkhole risk in Campbell County, TN: Pockets of it

Pockets of it

Soluble rock at the surface or under thin cover in part of the county.

On soluble rock: 28%
At or near the surface: 28%
Buried under cover: 0%

What this means before you buy

Check the parcel against your state survey sinkhole map, and ask for an inspection if cracks, depressions or sticking doors show up.

That works out to roughly 136 of Campbell County's 480 square miles on soluble rock, 136 of them with the rock at or near the surface. With about 40,238 residents (84 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 265 map points about 1.3 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: the signs to look for and how an inspection works, and how these percentages are measured.

Counties around Campbell County

The nearest county rated sinkhole country is Union County, TN, about 20 miles southeast, close enough that the same rock may run under the county line. None of the 6 closest counties land in the same band, so Campbell County stands out from its surroundings.

Scott County, TN 19 mi west · 0% at surface
Union County, TN 20 mi southeast · 89% at surface
Anderson County, TN 20 mi south · 50% at surface
Whitley County, KY 25 mi north · under 1% at surface
Claiborne County, TN 29 mi east · 75% at surface
McCreary County, KY 29 mi northwest · 7% at surface

The rock underneath

The largest mapped soluble unit here is the Copper Ridge Dolomite (dolostone (dolomite)), Cambrian in age, covering about 14% of the county. Next is the Chickamauga Group at 5%.

Against the rest of Tennessee

Campbell County ranks 59 of 95 in Tennessee for soluble rock at the surface, and sits above 78% of US counties on that measure.