Sinkhole risk in Union 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 to do about a house in Union County

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

Across 1,039 square miles, under one square mile of Union County maps onto soluble rock. With about 37,008 residents (36 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 314 map points about 1.8 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Union County

The nearest county rated sinkhole country is Izard County, AR, about 206 miles north. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Union Parish, LA 27 mi southeast · 0% at surface
Calhoun County, AR 28 mi north · 0% at surface
Bradley County, AR 32 mi northeast · 12% at surface
Claiborne Parish, LA 33 mi southwest · 0% at surface
Ouachita County, AR 33 mi northwest · 0% at surface
Columbia County, AR 37 mi west · 0% at surface

Against the rest of Arkansas

Union County ranks 71 of 75 in Arkansas for soluble rock at the surface, and sits above 0% of US counties on that measure.