Sinkhole risk in Pottawatomie County, OK: 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: 10%
At or near the surface: 10%
Buried under cover: 0%

What to do about a house in Pottawatomie County

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

That works out to roughly 81 of Pottawatomie County's 788 square miles on soluble rock, 81 of them with the rock at or near the surface. With about 74,446 residents (94 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 291 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Pottawatomie County

The nearest county rated sinkhole country is Grady County, OK, about 54 miles west. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Seminole County, OK 20 mi east · 34% at surface
Cleveland County, OK 21 mi west · 3% at surface
McClain County, OK 31 mi southwest · 0% at surface
Lincoln County, OK 34 mi north · 28% at surface
Oklahoma County, OK 35 mi northwest · 11% at surface
Pontotoc County, OK 37 mi southeast · 28% at surface

Which formation it is

The largest mapped soluble unit here is the Vanoss Group (shale), Late Pennsylvanian in age, covering about 10% of the county.

Against the rest of Oklahoma

Pottawatomie County ranks 45 of 77 in Oklahoma for soluble rock at the surface, and sits above 68% of US counties on that measure.