Sinkhole risk in Codington County, SD: 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 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 688 square miles, under one square mile of Codington County maps onto soluble rock. With about 29,278 residents (43 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 396 map points about 1.3 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Codington County

The nearest county rated sinkhole country is Boyd County, NE, about 163 miles southwest. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Hamlin County, SD 20 mi south · 0% at surface
Grant County, SD 25 mi northeast · 0% at surface
Clark County, SD 27 mi west · 0% at surface
Deuel County, SD 29 mi southeast · 0% at surface
Day County, SD 33 mi northwest · 0% at surface
Kingsbury County, SD 44 mi south · 0% at surface

Against the rest of South Dakota

Codington County ranks 22 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.