Frank Sam Mine (u S Pumice Mine)

AbandonedPumiceSurfaceMSHA

Location

StateCalifornia
CountyMono
Nearest TownLee Vining
Coordinates37.95500, -119.10083

Commodities

PrimaryPumice

Mine Details

StatusAbandoned
TypeSurface
OperatorUnited States Pumice Company
Data SourceMSHA
Source ID0404225

What This Means

This mine is listed as abandoned or sealed in federal records. Abandoned mines can pose safety and environmental risks, including unstable ground, toxic gas accumulation, flooded shafts, and potential groundwater contamination from heavy metals or acid mine drainage. Never enter an abandoned mine. If you live near this site, consider checking with your state environmental agency about any ongoing remediation or monitoring programs.

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