+ Advanced Power Alliance

+ American Clean Power Association

+ Arizona Public Service Company

+ Basin Electric Power Cooperative

+ Black Hills Colorado Electric

+ Black Hills Power, Inc.

+ Bonneville Power Administration

+ Chelan (PUD No.1 of Chelan County)

+ Cheyenne Light, Fuel & Power Co.

+ Clean Energy Buyers Association

+ Colorado Independent Energy Association

+ Interwest Energy Alliance

+ Liberty Utilities (Calpeco Electric)

+ Municipal Energy Agency of Nebraska

+ Natural Resources Defense Council

+ Northwest & Intermountain Power Producers Coalition (NIPPC)

+ NW Energy Coalition

+ Powerex Corp.

+ Public Generating Pool

+ Public Power Council

+ Public Service Company of Colorado

+ PUD No. 2 of Grant County, Washington

+ Puget Sound Energy

+ Renewable Northwest

+ Salt River Project

+ Sierra Club

+ Snohomish Public Utility

+ Tacoma Power

+ The Energy Authority

+ Tri-State

+ Tucson Electric Power Company

+ Western Energy Freedom Action

+ Western Power Trading Forum

+ Western Resource Advocates