Sinkhole risk in Columbiana County, OH: No soluble rock mapped
No soluble rock mapped
No soluble bedrock mapped.
- On soluble rock
- under 1%
- At or near the surface
- 0%
- Buried under cover
- under 1%
What to do about a house in Columbiana County
No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.
That works out to roughly 4 of Columbiana County's 532 square miles on soluble rock. With about 99,823 residents (188 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 299 map points about 1.3 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: why gypsum and salt move faster than limestone, and how these percentages are measured.
Counties around Columbiana County
The nearest county rated sinkhole country is Monroe County, MI, about 161 miles northwest. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.
- Mahoning County, OH 17 mi north · 0% at surface
- Hancock County, WV 21 mi southeast · 2% at surface
- Carroll County, OH 21 mi southwest · 0% at surface
- Beaver County, PA 23 mi east · 9% at surface
- Jefferson County, OH 26 mi south · 31% at surface
- Lawrence County, PA 28 mi northeast · 6% at surface
The rock underneath
The largest mapped soluble unit here is the Allegheny and Pottsville Groups, Undivided (shale), Pennsylvanian in age, covering about under 1% of the county.
The county also lies over the Michigan Basin; Ohio Basin; Appalachian Basin, a deep salt or gypsum basin. Deep beds rarely cause surface collapse on their own, but wells and mining into them have.
Against the rest of Ohio
Columbiana County ranks 22 of 88 in Ohio for soluble rock at the surface, and sits above 0% of US counties on that measure.
- Adams County 35%
- Jefferson County 31%
- Harrison County 24%
- Belmont County 20%
- Brown County 9%