Sinkhole risk in Alleghany County, NC: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

The next step for one property

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 235 square miles, under one square mile of Alleghany County maps onto soluble rock. With about 11,379 residents (48 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 244 map points about 1.0 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 Alleghany County

The nearest county rated sinkhole country is Wythe County, VA, about 28 miles north, close enough that the same rock may run under the county line. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Grayson County, VA 12 mi north · 0% at surface
Galax city, VA 17 mi northeast · 0% at surface
Wilkes County, NC 19 mi south · 0% at surface
Ashe County, NC 21 mi west · 0% at surface
Surry County, NC 25 mi east · 12% at surface
Carroll County, VA 28 mi northeast · under 1% at surface

Against the rest of North Carolina

Alleghany County ranks 66 of 100 in North Carolina for soluble rock at the surface, and sits above 0% of US counties on that measure.