Sinkhole risk in Evans County, GA: Pockets of it

Pockets of it

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

On soluble rock: 100%
At or near the surface: 0%
Buried under cover: 100%

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 183 of Evans County's 183 square miles on soluble rock. With about 10,869 residents (59 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 252 map points about 0.9 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why the 100% under cover still counts, and the signs to look for and how an inspection works.

Counties around Evans County

The nearest county rated sinkhole country is Hampton County, SC, about 61 miles northeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Tattnall County, GA 12 mi southwest · 0% at surface
Bulloch County, GA 19 mi northeast · 13% at surface
Candler County, GA 20 mi northwest · 0% at surface
Toombs County, GA 26 mi west · 0% at surface
Bryan County, GA 28 mi east · under 1% at surface
Long County, GA 29 mi south · 0% at surface

Which formation it is

The largest mapped soluble unit here is the "Hawthorn Formation" (sand), Miocene in age, covering about 96% of the county. Next is the Charlton Formation and Duplin Marl at 4%.

Against the rest of Georgia

Evans County ranks 96 of 159 in Georgia for soluble rock at the surface, and sits above 0% of US counties on that measure.