Sinkhole risk in Grayson County, VA: 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%

What to do about a house in Grayson County

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

Across 442 square miles, under one square mile of Grayson County maps onto soluble rock. With about 15,265 residents (35 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 588 map points about 0.9 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Grayson County

The nearest county rated sinkhole country is Wythe County, VA, about 19 miles northeast, close enough that the same rock may run under the county line. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Alleghany County, NC 12 mi south · 0% at surface
Galax city, VA 17 mi east · 0% at surface
Wythe County, VA 19 mi northeast · 64% at surface
Ashe County, NC 21 mi southwest · 0% at surface
Smyth County, VA 22 mi northwest · 55% at surface
Carroll County, VA 28 mi east · under 1% at surface

Against the rest of Virginia

Grayson County ranks 106 of 133 in Virginia for soluble rock at the surface, and sits above 0% of US counties on that measure.