Sinkhole risk in Campbell County, KY: Pockets of it

Pockets of it

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

On soluble rock: 27%
At or near the surface: 26%
Buried under cover: 1%

The next step for one property

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 41 of Campbell County's 151 square miles on soluble rock, 39 of them with the rock at or near the surface. With about 94,008 residents (621 per square mile), most of the county is built up, so a mapped unit is likely to sit under somebody's street. The figures come from 502 map points about 0.5 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: 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 Kenton County, KY, about 8 miles west, close enough that the same rock may run under the county line. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Kenton County, KY 8 mi west · 59% at surface
Clermont County, OH 14 mi northeast · 0% at surface
Pendleton County, KY 17 mi south · 9% at surface
Boone County, KY 19 mi west · 16% at surface
Hamilton County, OH 19 mi northwest · 2% at surface
Bracken County, KY 23 mi southeast · 33% at surface

What Campbell County is built on

The largest mapped soluble unit here is the Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (limestone), Ordovician in age, covering about 25% of the county. Next is the Point Pleasant Formation at 1%.

Against the rest of Kentucky

Campbell County ranks 62 of 120 in Kentucky for soluble rock at the surface, and sits above 78% of US counties on that measure.