| Providers on WesTTrans |
|---|
| Provider Code | Provider Name |
|---|
| AZPS | Arizona Public Service Company |
| EPE | El Paso Electric |
| IPCO | Idaho Power Company |
| IID | Imperial Irrigation District |
| LDWP | Los Angeles Department of Water & Power |
| NEVP | Nevada Power Company |
| NWMT | Northwest Energy |
| PGE | Portland General Electric |
| PNM | Public Service Company of New Mexico |
| PSEI | Puget Sound Energy |
| SMUD | Sacramento Municipal Utility District |
| SRP | Salt River Project |
| SPP | Sierra Pacific Power Company |
| SWTC | Southwest Transmisison Coop. |
| TNP | Texas New Mexico Power |
| TSGT | Tri-State Generation & Transmission Association, Inc. |
| TEPC | Tucson Electric Power Company |
| WACM | Western Area Power Administration - CM |
| WALC | Western Area Power Administration - Desert Southwest Region |
| WALM | Western Area Power Administration - RMR |
| WAMP | Western Area Power Administration - Sierra Nevada Region |