SinkholeOdds

Sinkhole risk in Greater Bridgeport Planning Region, CT: 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
1%
At or near the surface
0%
Buried under cover
1%

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 2 of Greater Bridgeport Planning Region's 140 square miles on soluble rock. With about 335,666 residents (2,394 per square mile), most of the county is built up, so a mapped unit is likely to sit under somebody's street. The figures come from 539 map points about 0.5 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Greater Bridgeport Planning Region

The nearest county rated sinkhole country is Union County, PA, about 201 miles west. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

What Greater Bridgeport Planning Region is built on

The largest mapped soluble unit here is the Basal member [of The Straits Schist] (schist), Silurian in age, covering about 1% of the county.

Against the rest of Connecticut

Greater Bridgeport Planning Region ranks 2 of 9 in Connecticut for soluble rock at the surface, and sits above 0% of US counties on that measure.