Prairie Power, Inc. Becomes the 18th Member-Owner of ACES

Carmel, IN and Jacksonville, IL

Prairie Power, Inc. (PPI), an Illinois based wholesale power cooperative, has joined as the 18th Member-Owner of ACES, effective January 1, 2011. ACES is a 200 employee national energy risk management and trading services company headquartered in Carmel, Indiana.

ACES will provide Prairie Power a broad suite of energy risk management services related to portfolio modeling and risk analytics, transmission congestion evaluations, mid-term trading, and long-term origination. Prairie Power selected the specific services it initially needs from ACES, but will have the opportunity to select other services as its resource portfolio, energy markets, and fuel risks change.

“ACES demonstrated to us they deserved our business and that they have sound, cost-effective solutions to help us manage our wholesale energy needs and risk,” said
Jay Bartlett, Prairie Power President & CEO.

David Tudor, President & CEO of ACES added “Prairie Power gradually
changed its power supply portfolio over the last couple of years and was seeking more
sophisticated analytical tools and market intelligence. We are excited about the opportunity to complement Prairie Power’s fine staff with these services and look forward to a long term, growing relationship.”

About Prairie Power, Inc.
Prairie Power, Inc. is a Member-owned, not-for-profit electric generation and transmission
cooperative located in Jacksonville, IL. PPI produces, purchases, and delivers over 1.5 million megawatt-hours of electricity to its 10 Member-owned electric distribution cooperatives. PPI’s distribution cooperatives provide retail electric service to over 78,000 residential, agricultural, commercial and industrial consumer-members throughout central Illinois. PPI is one of more than 60 generation and transmission (G&T) cooperatives that supply wholesale electric power to rural electric utilities in the United States.

PPI owns and operates approximately 574 miles of transmission at 138 kV, 69 kV, and 34.5 kV serving 78 distribution and transmission substations. PPI owns and operates 22 MW of coal fired base load generation, 150 MW of oil and gas-fired peaking units, and has an 8.2 percent joint ownership interest in the 1,600 MW Prairie State advanced clean-coal technology plant under development in Southern Illinois. PPI is also one of over 700 Touchstone Energy® Cooperatives in the United States. See http://www.ppi.coop/assets.htm for more information.

Questions for Prairie Power can be directed to Greg Nieman, Director Administrative Services, at 217-245-6161 or gnieman@ppi.coop.