| Arizona |
| Anaconda Copper Smelting | Tucson (south of) |
| Anamax Copper Smelting | Ajo |
| Magma Copper Smeltering Plant | San Manuel |
| Phillips-Dodge Copper Plant | Morenci |
| |
| California |
| Alcan Aluminum Plant | Riverside |
| Kaiser Steel Mill | Fontana |
| U.S. Steel Mill | Fontana |
| U.S. Steel Mill | Pittsburg |
| U.S. Steel Mill (formerly Kaiser Steel) | Ontario |
| |
| Oregon |
| Cascade Rolling Mills | McMinnville |
| Columbia Steel Castings | Portland |
| ESCO Steel Foundry | Portland |
| Hannah Nickel Smeltering Plant | Riddle |
| Harvey Aluminum Plant | The Dalles |
| Oregon Steel Mill | Portland |
| Precision Cast Parts Plant | Milwaukie |
| Reynolds Metals Alum. Plant | Troutdale |
| Teledyne Wah Chang Metals Plant | Albany |
| |
| Utah |
| Kennicott Copper | Salt Lake City |
| |
| Washington |
| Alcoa Aluminum Plant | Vancouver |
| Alcoa Aluminum Plant | Wenatchee |
| Columbia Aluminum | Goldendale |
| Harvey Aluminum | Goldendale |
| INTALCO Aluminum | Cherry Point |
| INTALCO Aluminum | Ferndale |
| Kaiser Aluminum | Spokane |
| Kaiser Aluminum | Tacoma |
| Martin-Marietta Corp. | Goldendale |
| Reynolds Metals Alum. Plant | Longview |
| |
