Abandoned Mines in Guam
6Abandoned & Historical
Abandoned Mining in Guam
Federal databases record 6 abandoned, sealed, and historically closed mine locations in Guam. These include mines officially abandoned under MSHA oversight and past producers documented in the USGS Mineral Resources Data System. Abandoned mines are a legacy of centuries of mineral extraction and can pose ongoing environmental and safety concerns for nearby communities.
Safety Warning: Abandoned mines are extremely dangerous. Hazards include cave-ins, toxic gases, flooded shafts, unstable ground, and hidden vertical drops. Never enter an abandoned mine. Many are on private property. If you discover an unsecured abandoned mine, report it to your state mining agency.
Top Counties
| County | Abandoned/Historical |
|---|---|
| Guam County | 6 |
Abandoned Mine Sites
| Mine | County | Commodity | Status | Source |
|---|---|---|---|---|
| Jmc Quarry | Guam | Dimension Limestone | Abandoned | MSHA |
| Mariana Stones Corporation | Guam | Crushed, Broken Limestone NEC | Abandoned | MSHA |
| Mount Santa Rosa Quarry | Guam | Crushed, Broken Limestone NEC | Abandoned | MSHA |
| R10 Quarry | Guam | Crushed, Broken Limestone NEC | Abandoned | MSHA |
| Various Locations | Guam | Construction Sand and Gravel | Abandoned | MSHA |
| Yigo, Raceway | Guam | Crushed, Broken Limestone NEC | Abandoned | MSHA |