Sinkhole risk in Henry County, OH: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 58%
At or near the surface: 0%
Buried under cover: 58%

What to do about a house in Henry County

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 241 of Henry County's 416 square miles on soluble rock. With about 27,536 residents (66 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 324 map points about 1.1 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why the 58% under cover still counts, and how these percentages are measured.

Counties around Henry County

The nearest county rated sinkhole country is Monroe County, MI, about 50 miles northeast. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.

Fulton County, OH 19 mi north · 0% at surface
Putnam County, OH 21 mi south · 0% at surface
Defiance County, OH 22 mi west · 0% at surface
Wood County, OH 23 mi east · 0% at surface
Paulding County, OH 30 mi southwest · 0% at surface
Hancock County, OH 31 mi southeast · 0% at surface

What Henry County is built on

The largest mapped soluble unit here is the Dundee Limestone (limestone), Devonian in age, covering about 24% of the county. Next is the Traverse Group at 16%.

Against the rest of Ohio

Henry County ranks 39 of 88 in Ohio for soluble rock at the surface, and sits above 0% of US counties on that measure.