Partial List of Customers

Alabama Power
AES
Alliant Energy
Celanese
Chevron USA
City Water, Light, & Power
Consumers Energy
Duke
Dynegy
El Paso Natural Gas
Entergy
Kansas City Power & Light
Georgia Power
Grand River Dam Authority
Luminant
Mississippi Power
Nevada Power
NRG
Oklahoma Gas & Electric
PacifiCorp
Portland General Electric
Salt River Project
Sierra Pacific Power Company
Tucson Electric
Unocal