Sinkhole risk in Hamlin 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%

The next step for one property

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

Across 507 square miles, under one square mile of Hamlin County maps onto soluble rock. With about 6,596 residents (13 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 390 map points about 1.1 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 Hamlin County

The nearest county rated sinkhole country is Knox County, NE, about 146 miles south. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Codington County, SD 20 mi north · 0% at surface
Deuel County, SD 25 mi east · 0% at surface
Kingsbury County, SD 27 mi southwest · 0% at surface
Brookings County, SD 28 mi southeast · 0% at surface
Clark County, SD 29 mi northwest · 0% at surface
Grant County, SD 39 mi northeast · 0% at surface

Against the rest of South Dakota

Hamlin County ranks 33 of 66 in South Dakota for soluble rock at the surface, and sits above 0% of US counties on that measure.