Sinkhole risk in Perquimans County, NC: 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
- 3%
- At or near the surface
- 3%
- Buried under cover
- 0%
What to do about a house in Perquimans County
Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.
That works out to roughly 6 of Perquimans County's 247 square miles on soluble rock, 6 of them with the rock at or near the surface. With about 13,460 residents (54 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 569 map points about 0.7 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: how these percentages are measured, and the warning signs that apply anywhere.
Counties around Perquimans County
The nearest county rated sinkhole country is Bertie County, NC, about 32 miles west, close enough that the same rock may run under the county line. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.
- Pasquotank County, NC 10 mi northeast · 0% at surface
- Chowan County, NC 12 mi west · 15% at surface
- Camden County, NC 17 mi northeast · 0% at surface
- Gates County, NC 25 mi northwest · 46% at surface
- Washington County, NC 25 mi south · 11% at surface
- Tyrrell County, NC 25 mi southeast · 0% at surface
Which formation it is
The largest mapped soluble unit here is the Yorktown Formation and Duplin Formation, Undivided (clay or mud), Tertiary in age, covering about 3% of the county.
Against the rest of North Carolina
Perquimans County ranks 55 of 100 in North Carolina for soluble rock at the surface, and sits above 59% of US counties on that measure.
- Duplin County 93%
- Jones County 92%
- Scotland County 91%
- Pender County 89%
- Robeson County 89%