Sinkhole risk in Pulaski County, IN: 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: 88%
At or near the surface: 0%
Buried under cover: 88%

What to do about a house in Pulaski County

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

That works out to roughly 382 of Pulaski County's 434 square miles on soluble rock. With about 12,421 residents (29 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 405 map points about 1.0 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: why the 88% under cover still counts, and how these percentages are measured.

Counties around Pulaski County

The nearest county rated sinkhole country is Barry County, MI, about 128 miles northeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Starke County, IN 17 mi north · 0% at surface
White County, IN 22 mi southwest · 0% at surface
Fulton County, IN 22 mi east · 0% at surface
Jasper County, IN 22 mi west · 0% at surface
Cass County, IN 27 mi southeast · 4% at surface
Marshall County, IN 29 mi northeast · 0% at surface

What Pulaski County is built on

The largest mapped soluble unit here is the Wabash Formation (limestone), Silurian in age, covering about 49% of the county. Next is the Muscatatuck Group at 39%.

Against the rest of Indiana

Pulaski County ranks 74 of 92 in Indiana for soluble rock at the surface, and sits above 0% of US counties on that measure.