Sinkhole risk in Tattnall 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%

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 481 of Tattnall County's 481 square miles on soluble rock. With about 24,275 residents (50 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 475 map points about 1.0 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Tattnall County

The nearest county rated sinkhole country is Hampton County, SC, about 74 miles northeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Evans County, GA 12 mi northeast · 0% at surface
Toombs County, GA 17 mi west · 0% at surface
Candler County, GA 25 mi north · 0% at surface
Appling County, GA 25 mi southwest · 0% at surface
Long County, GA 28 mi southeast · 0% at surface
Montgomery County, GA 29 mi west · 0% at surface

Which formation it is

The largest mapped soluble unit here is the "Hawthorn Formation" (sand), Miocene in age, covering about 97% of the county. Next is the Charlton Formation and Duplin Marl at 3%.

Against the rest of Georgia

Tattnall County ranks 144 of 159 in Georgia for soluble rock at the surface, and sits above 0% of US counties on that measure.