1. POTENTIAL IMPACTS OF FEDERAL REGULATIONS ON MISSOURI ELECTRIC UTILITIES LEWIS MILLS MISSOURI PUBLIC COUNSEL November 11, 2012

2. MISSOURI OFFICE OF THE PUBLIC COUNSEL 2 MISSOURI PSC’S ORDER The Commission wants to determine the potential impact on Missouri's electric utilities' electric generation plants of current and future EPA rules under the Clean Air and Clean Water Acts. Specifically the Commission wants to determine the potential impact on reliability and costs. The Commission wants to determine the potential impact on Missouri's electric utilities' electric generation plants of current and future EPA rules under the Clean Air and Clean Water Acts. Specifically the Commission wants to determine the potential impact on reliability and costs.

3. MISSOURI OFFICE OF THE PUBLIC COUNSEL 3 MISSOURI IOUs AT A GLANCE AMEREN MISSOURI KANSAS CITY POWER & LIGHT KCP&L GREATER MISSOURI OPERATIONS EMPIRE DISTRICT ELECTRIC COMPANY

4. MISSOURI OFFICE OF THE PUBLIC COUNSEL

6. 6 SO2 COMPLIANCE OPTIONS  FUEL SWITCHING  ALLOWANCE PURCHASES  REDUCTION IN GENERATION  DRY SORBENT INJECTION  SCRUBBERS

7. MISSOURI OFFICE OF THE PUBLIC COUNSEL 7 NOX COMPLIANCE OPTIONS  TUNING EXISTING UNITS  ALLOWANCE PURCHASES  REDUCTION IN GENERATION  SCRs OR SNCRS  LOW NOX BURNERS  OVER-FIRED AIR

8. MISSOURI OFFICE OF THE PUBLIC COUNSEL 8 MATS COMPLIANCE OPTIONS  ESP UPGRADES  BAGHOUSES  SCRUBBERS  DRY SORBENT INJECTION  ACI  FUEL ADDITIVES

9. MISSOURI OFFICE OF THE PUBLIC COUNSEL 9 316(a)-(b) COMPLIANCE OPTIONS  ENHANCED SCREENS  REDUCED WATER VELOCITY  COOLING TOWERS  THERMAL AND BIO STUDIES  REDUCED GENERATION

10. MISSOURI OFFICE OF THE PUBLIC COUNSEL 10 COAL ASH COMPLIANCE OPTIONS Huge disparities depending on which path EPA chooses. I don’t have good information on compliance options or costs.

11. MISSOURI OFFICE OF THE PUBLIC COUNSEL 11 MISSOURI IOUs AT A GLANCE AMEREN MISSOURI KANSAS CITY POWER & LIGHT KCP&L GREATER MISSOURI OPERATIONS EMPIRE DISTRICT ELECTRIC COMPANY

12. MISSOURI OFFICE OF THE PUBLIC COUNSEL 12 SOME ACRONYMS FGD – Flue Gas Desulfurization SCR – Selective Catalytic Reduction BH – Bag House ACI – Activated Carbon Injection CT – Wet Cooling Tower

13. MISSOURI OFFICE OF THE PUBLIC COUNSEL 13 AMEREN MISSOURI

14. MISSOURI OFFICE OF THE PUBLIC COUNSEL 14 EMPIRE DISTRICT

15. MISSOURI OFFICE OF THE PUBLIC COUNSEL 15 KCPL AND KCPL-GMO

16. MISSOURI OFFICE OF THE PUBLIC COUNSEL 16 THE BOTTOM LINE – SORT OF $5,859,000,000 $1,017,000,000 $6, 876,000,000

17. CONTACT INFORMATION Lewis Mills 200 Madison St., Suite 650 Jefferson City, Missouri 65101 Telephone: 573-751-4857 Toll free: 866-922-2959 Email: lewis.mills@ded.mo.govlewis.mills@ded.mo.gov www.opc.mo.gov MISSOURI OFFICE OF THE PUBLIC COUNSEL 17