Sinkhole risk in Manassas Park city, VA: No soluble rock mapped

What this means before you buy

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

Across 3 square miles, under one square mile of Manassas Park city maps onto soluble rock. With about 16,611 residents (5,491 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 396 map points about 0.1 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 Manassas Park city

The nearest county rated sinkhole country is Clarke County, VA, about 38 miles northwest, 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.

• Manassas city, VA 3 mi southwest · under 1% at surface
• Prince William County, VA 5 mi southwest · 2% at surface
• Fairfax city, VA 10 mi northeast · 0% at surface
• Fairfax County, VA 10 mi northeast · 2% at surface
• Falls Church city, VA 16 mi northeast · 0% at surface
• Alexandria city, VA 20 mi east · 0% at surface

Against the rest of Virginia

Manassas Park city ranks 127 of 133 in Virginia for soluble rock at the surface, and sits above 0% of US counties on that measure.

• Lexington city 100%
• Salem city 100%
• Roanoke city 98%
• Winchester city 90%
• Bristol city 89%