Sinkhole risk in Okfuskee 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 Okfuskee County

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

That works out to roughly 62 of Okfuskee County's 618 square miles on soluble rock, 62 of them with the rock at or near the surface. With about 11,364 residents (18 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 298 map points about 1.4 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 Okfuskee County

The nearest county rated sinkhole country is Cherokee County, OK, about 81 miles east. None of the 6 closest counties land in the same band, so Okfuskee County stands out from its surroundings.

Okmulgee County, OK 24 mi northeast · under 1% at surface
Seminole County, OK 26 mi southwest · 34% at surface
Hughes County, OK 29 mi south · 0% at surface
Creek County, OK 31 mi north · 15% at surface
Lincoln County, OK 35 mi northwest · 28% at surface
McIntosh County, OK 38 mi east · 0% at surface

The rock underneath

The largest mapped soluble unit here is the Nellie Bly Formation and Hogshooter Limestone (shale), Middle Pennsylvanian in age, covering about 10% of the county. Next is the Dewey Formation or Dewey Limestone at under 1%.

Against the rest of Oklahoma

Okfuskee County ranks 46 of 77 in Oklahoma for soluble rock at the surface, and sits above 68% of US counties on that measure.