Piedmont, CA Mines
Mines in Piedmont, California
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Ada Sand and Gravel Pit No 2 | Ada Sand And Gravel, Inc. | Unknown | Sand and Gravel | |
| Alma | Underground | Copper Sulfur |
||
| Moller Pit | Unknown | Sand and Gravel | ||
| Quarry | Sand and Gravel | |||
| Sanderling Dredge | Unknown | Sand and Gravel |