Hayward, CA Mines
Mines in Hayward, California
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| American Salt Co. | Private | Sodium | ||
| Ideal Cement Co. | Private | Stone, Crushed Stone, Dimension |
||
| Oliver Bros. Salt Co. | Private | Sodium | ||
| Unnamed Location | Unknown | Stone |
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