Sinkhole risk in Miller County, GA: Sinkhole country

Sinkhole country

Soluble rock at or near the surface across much of the county.

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

What this means before you buy

Get a sinkhole or geotechnical inspection before buying, building or adding weight to a foundation.

That works out to roughly 282 of Miller County's 282 square miles on soluble rock, 282 of them with the rock at or near the surface. With about 5,824 residents (21 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 382 map points about 0.9 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Miller County

The closest county with no soluble rock mapped is Randolph County, GA, about 41 miles north. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Early County, GA 15 mi northwest · 81% at surface
Seminole County, GA 18 mi southwest · 86% at surface
Baker County, GA 20 mi northeast · 93% at surface
Decatur County, GA 21 mi southeast · 55% at surface
Calhoun County, GA 26 mi north · 40% at surface
Mitchell County, GA 32 mi east · 66% at surface

Which formation it is

The largest mapped soluble unit here is the Ocala Limestone (limestone), Eocene in age, covering about 100% of the county.

Against the rest of Georgia

Miller County ranks 1 of 159 in Georgia for soluble rock at the surface, and sits above 99% of US counties on that measure.