EXELON CORPORATION
10 S. Dearborn Street
37th Floor
Chicago, IL 60603
312-294-7398

INTEGRYS ENERGY GROUP INC.
130 E. Randolph Street
Chicago, IL 60601
800-699-1269

MIDWEST GENERATION EME LLC
An Edison International Company
440 S. LaSalle Street
Suite 3500
Chicago, IL 60605

NICOR
1844 W. Ferry Road
Naperville, IL 60563
630-305-9500

NISOURCE, INC.
801 E. 86th Ave.
Merrillville, IN 46410

PEOPLE'S GAS & NORTH SHORE GAS
130 E. Randolph Street
Chicago, IL 60601

ILLINOIS COMMERCE COMMISSION
527 E. Capitol Avenue
Springfield, IL 62701

CITIZEN'S UTILITY BOARD
309 W. Washington, Suite 800
Chicago, IL 60606
312-263-4282