Sinkhole risk in Gallia County, OH: 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 Gallia County

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

Across 467 square miles, under one square mile of Gallia County maps onto soluble rock. With about 28,886 residents (62 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 592 map points about 0.9 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Gallia County

The nearest county rated sinkhole country is Fleming County, KY, about 82 miles west. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Mason County, WV 15 mi east · 0% at surface
Lawrence County, OH 19 mi southwest · 0% at surface
Jackson County, OH 22 mi northwest · 0% at surface
Meigs County, OH 24 mi northeast · 0% at surface
Cabell County, WV 28 mi south · 0% at surface
Putnam County, WV 30 mi southeast · 0% at surface

Against the rest of Ohio

Gallia County ranks 33 of 88 in Ohio for soluble rock at the surface, and sits above 0% of US counties on that measure.