Sinkhole risk in Franklin County, WA: 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 1,242 square miles, under one square mile of Franklin County maps onto soluble rock. With about 101,238 residents (82 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 571 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 Franklin County
The nearest county rated sinkhole country is Emery County, UT, about 665 miles southeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.
- Walla Walla County, WA 28 mi southeast · 0% at surface
- Benton County, WA 36 mi southwest · 0% at surface
- Adams County, WA 38 mi northeast · 0% at surface
- Columbia County, WA 50 mi east · 0% at surface
- Grant County, WA 54 mi northwest · 0% at surface
- Garfield County, WA 65 mi east · 0% at surface
Against the rest of Washington
Franklin County ranks 18 of 39 in Washington for soluble rock at the surface, and sits above 0% of US counties on that measure.
- San Juan County 4%
- Stevens County 3%
- Pend Oreille County 2%
- Okanogan County under 1%
- Ferry County under 1%