1 EMS User’s Group Meeting Deregulation Session Midwest ISO Status Update June 7, 1999 Findlay, Illinois Walter O.Stadlin KEMA Consulting, Horsham, PA

2 Fair Competition

3 Control Areas - Track Layout

4 Transmission (Track) Owners Allegheny Power Ameren Companies Central Illinois Light Company Cinergy Services, Inc. Commonwealth Edison Hoosier Energy Rural Electric Cooperative Illinova Corporation LG&E Corporation Southern Indiana Gas & Electric Company Wabash Valley Power Association, Inc. Wisconsin Electric Power Company

5 Track Comparisons

6 Track Comparisons (Continued)

7 Municipals/Cooperatives/ Transmission & Distribution Utilities Independent Power Producers/ Exempt Wholesale Generators Power Marketers/Brokers End-User Customers MISO Customers (The Drivers)

8 Wisconsin Public Power, Inc. Illinois Municipal Electric Agency Cleveland Public Power, Department of Public Utilities American Municipal Power-Ohio, Inc. Southern Illinois Power Cooperative Munis/Coops/T & D Utilities

9 IPPs/EWGs U.S. Generating Co. and PG&E Energy trading Reliant Energy Wholesale Group Electric Clearinghouse, Inc./Dynegy

10 Power Marketers/Brokers Citizens Power Sales FirstEnergy Corp. Constellation Power Source, Inc. Automated Power Exchange, Inc. American Electric Power Co. Detroit Edison Co. Consumers Energy Co.

11 Caterpillar Corp. with Granite City Steel Division of National Steel Corp. and LTV Air Products & Chemicals, Inc. End-User Customers

12 MISO Market Model - No Speed Limit

13 No Crashes - Info/Data Exchange

14 Driver ~ Pit Crew Comm Services ICCP FTP Auditable HTTP Webserver Special Communications Service Applications OASIS

15 The Pit Crew - 24x7x365 Service

16 Midwest ISO Responsibilities Wide Area Security & Reliability Transmission Service Reservations Inter- & Intra-change Transactions Transmission Congestion Relief Ancillary Services Settlement, Accounting & Billing Transmission & Generation Maintenance Transmission Planning

17 Generation Control Area Responsibilities Local Area Security & Reliability SCADA Control Area Operation (ACE) Generator MW and Voltage Control Load Forecasting Coordination with Midwest ISO Coordination with Power Market

18 Track Administration Facilities Temporary Office & Interim Backup Primary Control Center Permanent Backup Control Center (Future)

19 Schedule Track Preparation - In Progress Speed Trials - January 1, 2001 Drivers Start Your Engines - June 1, 2001