Port Costa, CA Mines
Mines in Port Costa, California
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Main Mine & Mill | Unknown | Stone, Crushed | ||
| Mcnears | Stone, Dimension | |||
| Mcnears | Unknown | Stone | ||
| Port Costa Clay Products Co | Porta Costa Materials, Inc. | Unknown | Stone, Crushed | |
| Port Costa Clay Products Co. | Stone | |||
| Unnamed Location | Unknown | Clays |
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