1 | HLPX | Otter Tail Power Co. | added 1/2005; 7/2005 | | NAKINA |
2 | HLPX | Houston Lighting & Power Co. | 1/1950-1/1980; eliminated 5/1983 | | NAKINA |
3 | HLPX | Houston Lighting & Power Co. | 1/52-1/80; eliminated 5/83 | | NRHS |
4 | HLPX | *HOUSTON LIGHTING & POWER CO. | | | PWRC |
5 | HLPX | +OTTER TAIL POWER CO. | | | PWRC |
6 | HLPX | Houston Lighting and Power | | | RSRV |
7 | HLPX | OTTER TAIL POWER CO | | | SCAC4 |