Sinkhole risk in Logan County, OK: 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 744 square miles, under one square mile of Logan County maps onto soluble rock. With about 53,860 residents (72 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 326 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Logan County

The nearest county rated sinkhole country is Canadian County, OK, about 39 miles southwest, close enough that the same rock may run under the county line. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.

• Oklahoma County, OK 25 mi south · 11% at surface
• Kingfisher County, OK 27 mi west · 15% at surface
• Payne County, OK 29 mi northeast · 18% at surface
• Noble County, OK 35 mi north · 0% at surface
• Lincoln County, OK 35 mi southeast · 28% at surface
• Garfield County, OK 37 mi northwest · 8% at surface

Against the rest of Oklahoma

Logan County ranks 72 of 77 in Oklahoma for soluble rock at the surface, and sits above 0% of US counties on that measure.

• Delaware County 94%
• Adair County 79%
• Caddo County 79%
• Harmon County 77%
• Cherokee County 66%