SinkholeOdds

Sinkhole risk in Ouachita County, AR: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

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

What this means before you buy

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 733 square miles, under one square mile of Ouachita County maps onto soluble rock. With about 21,684 residents (30 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 300 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Ouachita County

The nearest county rated sinkhole country is Izard County, AR, about 181 miles north. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Against the rest of Arkansas

Ouachita County ranks 62 of 75 in Arkansas for soluble rock at the surface, and sits above 0% of US counties on that measure.