Mines in Concord, California
| Mine |
Owner |
Land Status |
Work Type |
Minerals |
| Cowell |
|
Unknown |
|
Stone, Dimension |
| Cowell Silver |
|
Unknown |
|
Silver |
| Cowell Silver Sand Co., Laws |
|
|
|
Silica |
| Harrison-Birdwell - Pacific Cement and Aggregates Co. |
|
|
|
Stone |
| Henry Cowell Lime & Cement Co. |
|
Unknown |
|
Calcium |
| Martin |
|
|
|
Stone, Crushed |
| Martin |
|
Unknown |
|
Stone, Crushed |
| Mt. Diablo Lime Marl Co. |
|
|
|
Limestone |
| Mt. Diablo Lime Marl Co. |
|
Unknown |
|
Calcium |
| Scott Pit |
|
Unknown |
|
Stone |
| Silver Sand |
|
Unknown |
|
Sand and Gravel |
| Unnamed |
|
|
|
Stone |
| Unnamed |
|
|
|
Stone |
| Unnamed |
|
|
|
Stone |
| Unnamed Location |
Ginochio Brothers |
|
|
Stone, Crushed |
| Unnamed Location |
|
Unknown |
|
Calcium |
