National Quarries

AbandonedDimension GraniteSurfaceMSHA

Location

StateCalifornia
CountySan Diego
Nearest TownSan Marcos
Coordinates33.17972, -117.15722

Commodities

PrimaryDimension Granite

Mine Details

StatusAbandoned
TypeSurface
OperatorSuperior Ready Mix Concrete L.P.
Data SourceMSHA
Source ID0400204

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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