Sinkhole risk in Traill County, ND: 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 862 square miles, under one square mile of Traill County maps onto soluble rock. With about 7,989 residents (9 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 377 map points about 1.5 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 Traill County

The nearest county rated sinkhole country is Boyd County, NE, about 324 miles south. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

• Steele County, ND 26 mi west · 0% at surface
• Norman County, MN 34 mi east · 0% at surface
• Grand Forks County, ND 36 mi north · 0% at surface
• Cass County, ND 36 mi south · 0% at surface
• Polk County, MN 42 mi northeast · 0% at surface
• Clay County, MN 49 mi southeast · 0% at surface

Against the rest of North Dakota

Traill County ranks 50 of 53 in North Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.

• Cavalier County 2%
• Ransom County under 1%
• Dunn County under 1%
• Barnes County under 1%
• Slope County under 1%