Sinkhole risk in Sioux County, ND: 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 Sioux County
No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.
Across 1,094 square miles, under one square mile of Sioux County maps onto soluble rock. With about 3,713 residents (3 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 483 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: how these percentages are measured, and the warning signs that apply anywhere.
Counties around Sioux County
The nearest county rated sinkhole country is Fall River County, SD, about 233 miles southwest. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.
- Corson County, SD 30 mi south · 0% at surface
- Grant County, ND 32 mi northwest · 0% at surface
- Emmons County, ND 41 mi east · 0% at surface
- Morton County, ND 43 mi north · 0% at surface
- Campbell County, SD 56 mi southeast · 0% at surface
- Burleigh County, ND 66 mi northeast · 0% at surface
Against the rest of North Dakota
Sioux County ranks 45 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%