Sinkhole risk in Bullock County, AL: Pockets of it

Pockets of it

Soluble rock at the surface or under thin cover in part of the county.

On soluble rock: 31%
At or near the surface: 31%
Buried under cover: 0%

What to do about a house in Bullock County

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 194 of Bullock County's 623 square miles on soluble rock, 194 of them with the rock at or near the surface. With about 9,901 residents (16 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 251 map points about 1.6 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 Bullock County

The nearest county rated sinkhole country is Houston County, AL, about 70 miles south. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Macon County, AL 20 mi north · 8% at surface
Barbour County, AL 24 mi southeast · 14% at surface
Pike County, AL 25 mi southwest · 31% at surface
Montgomery County, AL 29 mi west · 49% at surface
Russell County, AL 34 mi northeast · 3% at surface
Lee County, AL 41 mi northeast · 0% at surface

What Bullock County is built on

The largest mapped soluble unit here is the Selma Group; Mooreville Chalk (carbonate), Cretaceous in age, covering about 24% of the county. Next is the Selma Group; Demopolis Chalk at 7%.

Against the rest of Alabama

Bullock County ranks 20 of 67 in Alabama for soluble rock at the surface, and sits above 80% of US counties on that measure.