Alabama Power

Allegheny Power Service Corporation
Arizona Public Service Company

Aquila
Chevron USA
Duke Energy Power Services
Duquesne Light Company
El Paso Natural Gas
Entergy Operations Inc.
GPU Genco
Georgia Power
Houston Lighting & Power Company
Mirant Mid-Atlantic
Nevada Power Company
New York Power Authority
NRG Corp

Oklahoma Gas & Electric
Pacific Gas & Electric
PG&E Diablo Canyon Nuclear Station
PacifiCorp
Potomac Electric Power Company
Reliant Energy
Salt River Project
San Diego Gas & Electric
San Juaquin Refining
SCE San Onofre Nuclear Station
Sierra Pacific Power Company
Southern California Edison Company
Southern California Gas Company
Texas Utilities
Tucson Electric
United Illuminating Company
Unocal Refining / Tosco
Wisvest