Sinkhole risk in Calhoun 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 Calhoun County

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

Across 629 square miles, under one square mile of Calhoun County maps onto soluble rock. With about 4,690 residents (7 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 257 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Calhoun County

The nearest county rated sinkhole country is Izard County, AR, about 178 miles north. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Bradley County, AR 21 mi east · 12% at surface
Ouachita County, AR 21 mi west · 0% at surface
Union County, AR 28 mi south · 0% at surface
Dallas County, AR 29 mi north · 0% at surface
Cleveland County, AR 30 mi northeast · 33% at surface
Drew County, AR 46 mi east · 18% at surface

Against the rest of Arkansas

Calhoun County ranks 37 of 75 in Arkansas for soluble rock at the surface, and sits above 0% of US counties on that measure.