Sinkhole risk in Bibb County, GA: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 6%
At or near the surface: 6%
Buried under cover: 0%

The next step for one property

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 15 of Bibb County's 249 square miles on soluble rock, 15 of them with the rock at or near the surface. With about 157,056 residents (630 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 560 map points about 0.7 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Bibb County

The nearest county rated sinkhole country is Peach County, GA, about 18 miles southwest, close enough that the same rock may run under the county line. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Jones County, GA 17 mi northeast · 11% at surface
Crawford County, GA 18 mi west · 7% at surface
Peach County, GA 18 mi southwest · 59% at surface
Twiggs County, GA 18 mi southeast · 39% at surface
Monroe County, GA 20 mi northwest · 0% at surface
Houston County, GA 24 mi south · 61% at surface

The rock underneath

The largest mapped soluble unit here is the Lower Tertiary-Cretaceous undifferentiated (sand), Lower Tertiary-Cretaceous in age, covering about 6% of the county.

Against the rest of Georgia

Bibb County ranks 52 of 159 in Georgia for soluble rock at the surface, and sits above 64% of US counties on that measure.