Sinkhole risk in Lee County, GA: Sinkhole country

Sinkhole country

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

On soluble rock: 75%
At or near the surface: 75%
Buried under cover: 0%

The next step for one property

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

That works out to roughly 266 of Lee County's 356 square miles on soluble rock, 266 of them with the rock at or near the surface. With about 34,073 residents (96 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 309 map points about 1.1 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: the signs to look for and how an inspection works, and how these percentages are measured.

Counties around Lee County

The closest county with no soluble rock mapped is Webster County, GA, about 29 miles northwest. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Sumter County, GA 16 mi north · 8% at surface
Terrell County, GA 17 mi west · 16% at surface
Dougherty County, GA 20 mi south · 90% at surface
Crisp County, GA 24 mi east · 50% at surface
Worth County, GA 25 mi southeast · 28% at surface
Webster County, GA 29 mi northwest · under 1% at surface

What Lee County is built on

The largest mapped soluble unit here is the Ocala Limestone (limestone), Eocene in age, covering about 75% of the county.

Against the rest of Georgia

Lee County ranks 7 of 159 in Georgia for soluble rock at the surface, and sits above 94% of US counties on that measure.