Sinkhole risk in Telfair 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 437 of Telfair County's 437 square miles on soluble rock. With about 11,000 residents (25 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 563 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 Telfair County

The nearest county rated sinkhole country is Pulaski County, GA, about 39 miles northwest, close enough that the same rock may run under the county line. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Wheeler County, GA 18 mi northeast · 0% at surface
Ben Hill County, GA 19 mi southwest · 0% at surface
Jeff Davis County, GA 19 mi east · 0% at surface
Dodge County, GA 22 mi northwest · 6% at surface
Coffee County, GA 26 mi south · 0% at surface
Montgomery County, GA 29 mi northeast · 0% at surface

Which formation it is

The largest mapped soluble unit here is the "Hawthorn Formation" (sand), Miocene in age, covering about 91% of the county. Next is the Suwannee Limestone and its residuum at 9%.

Against the rest of Georgia

Telfair County ranks 146 of 159 in Georgia for soluble rock at the surface, and sits above 0% of US counties on that measure.