Sinkhole risk in Colonial Heights city, VA: 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: 12%
At or near the surface: 12%
Buried under cover: 0%

What to do about a house in Colonial Heights city

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

Across 8 square miles, under one square mile of Colonial Heights city maps onto soluble rock. With about 18,674 residents (2,484 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 436 map points about 0.1 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Colonial Heights city

The nearest county rated sinkhole country is Hertford County, NC, about 66 miles south. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Petersburg city, VA 4 mi south · 17% at surface
Hopewell city, VA 6 mi east · 14% at surface
Prince George County, VA 11 mi southeast · 13% at surface
Chesterfield County, VA 13 mi northwest · 2% at surface
Henrico County, VA 13 mi northeast · 7% at surface
Dinwiddie County, VA 18 mi southwest · under 1% at surface

What Colonial Heights city is built on

The largest mapped soluble unit here is the Lower Tertiary Deposits (sand), Tertiary in age, covering about 9% of the county. Next is the Chesapeake Group at 3%.

Against the rest of Virginia

Colonial Heights city ranks 54 of 133 in Virginia for soluble rock at the surface, and sits above 69% of US counties on that measure.