Sinkhole risk in Ramsey County, ND: 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
- 6%
- At or near the surface
- 0%
- Buried under cover
- 6%
What this means before you buy
Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.
That works out to roughly 76 of Ramsey County's 1,185 square miles on soluble rock. With about 11,510 residents (10 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 295 map points about 2.0 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: why the 6% under cover still counts, and how these percentages are measured.
Counties around Ramsey County
The nearest county rated sinkhole country is Boyd County, NE, about 371 miles south. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.
- Benson County, ND 31 mi southwest · 0% at surface
- Nelson County, ND 34 mi southeast · 0% at surface
- Cavalier County, ND 37 mi north · 2% at surface
- Towner County, ND 37 mi northwest · 0% at surface
- Eddy County, ND 38 mi south · 0% at surface
- Walsh County, ND 47 mi east · under 1% at surface
Which formation it is
The largest mapped soluble unit here is the Niobrara and Carlile Formations, Undivided (limestone), Cretaceous in age, covering about 6% of the county.
Against the rest of North Dakota
Ramsey County ranks 39 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%