Sinkhole risk in Lincoln County, AR: Pockets of it

Pockets of it

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

On soluble rock: 21%
At or near the surface: 21%
Buried under cover: 0%

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 116 of Lincoln County's 559 square miles on soluble rock, 116 of them with the rock at or near the surface. With about 12,868 residents (23 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 271 map points about 1.4 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: the signs to look for and how an inspection works, and how these percentages are measured.

Counties around Lincoln County

The nearest county rated sinkhole country is Izard County, AR, about 148 miles north. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Jefferson County, AR 25 mi northwest · 14% at surface
Drew County, AR 26 mi south · 18% at surface
Cleveland County, AR 26 mi west · 33% at surface
Desha County, AR 30 mi east · 0% at surface
Arkansas County, AR 31 mi northeast · 0% at surface
Bradley County, AR 42 mi southwest · 12% at surface

What Lincoln County is built on

The largest mapped soluble unit here is the Jackson Group (mixed clastic/carbonate), Late Eocene in age, covering about 21% of the county.

Against the rest of Arkansas

Lincoln County ranks 23 of 75 in Arkansas for soluble rock at the surface, and sits above 75% of US counties on that measure.