| Bridgeburg Dredge and Mill |
|
Private |
|
Sand and Gravel |
| Continental Clay Company |
Continental Clay Product Co |
Private |
|
Clays |
| Continental Clay Prod. Clay Mine |
|
Private |
|
Clays |
| Drexel Mine |
|
Private |
|
Clays |
| Drexel Pit |
|
Private |
|
Clays |
| Drexel Refractories, Inc., Sub. Of |
Drexel Refractories Inc |
Private |
|
Clays |
| Kittanning Limestone Quarry |
Kittanning Limestone Co. |
|
|
Stone, Crushed |
| Limestone Dredge and Mill |
|
Private |
|
Sand and Gravel |
| Reynolds Limestone Quarry |
Ross Reynolds |
Private |
|
Stone, Crushed |
| Tarrtown Pit and Mill |
|
Private |
|
Sand and Gravel |
| Tarrtown Pit and Mill |
|
Private |
|
Sand and Gravel |
| Unnamed Limestone Mine |
|
Private |
|
Stone, Crushed |
