Sinkhole risk in York County, NE: 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: 11%
At or near the surface: 0%
Buried under cover: 11%

The next step for one property

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

That works out to roughly 61 of York County's 573 square miles on soluble rock. With about 14,375 residents (25 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 391 map points about 1.2 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around York County

The nearest county rated sinkhole country is Kearney County, NE, about 75 miles west. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Polk County, NE 22 mi north · 2% at surface
Hamilton County, NE 22 mi west · 80% at surface
Seward County, NE 24 mi east · 0% at surface
Fillmore County, NE 24 mi south · 0% at surface
Merrick County, NE 31 mi northwest · 79% at surface
Clay County, NE 34 mi southwest · 60% at surface

Which formation it is

The largest mapped soluble unit here is the Niobrara Formation (limestone), Late Cretaceous in age, covering about 11% of the county.

Against the rest of Nebraska

York County ranks 93 of 93 in Nebraska for soluble rock at the surface, and sits above 0% of US counties on that measure.