1) APEX CLEAN ENERGY MANAGEMENT LLC

2) CONSTELLATION NEWENERGY - GAS DIVISION LLC

3) DAIRYLAND POWER COOPERATIVE

4) EDF RENEWABLES, INC.

5) ENBRIDGE ENERGY PARTNERS LP

6) GREAT RIVER ENERGY

7) ITC HOLDINGS CORP (INTL TRANSMISSION CO)

8) MN STATE BUILDING & CONSTRUCTION TRADES COUNCIL

9) MN TRANSMISSION OWNERS

10) NATIONAL GRID RENEWABLES

11) ONEOK

12) OTTER TAIL POWER COMPANY

13) RANGER POWER LLC

14) SUMMIT CARBON SOLUTIONS

15) XCEL ENERGY SERVICES, INC.