ACES Opens West Regional Trading Center

WECC Expansion Driven by Member Needs Expected to Enhance Growth Opportunities

Carmel, Indiana

ACES – a nationally recognized wholesale energy risk management and transaction execution service company – significantly expanded its presence in the western U.S. electricity market on May 1st by opening its West Regional Trading Center (WRTC) in Benson, AZ. In conjunction with this opening, nine staff members have transitioned from Arizona Electric Power Cooperative (AEPCO) to become ACES staff, and ACES modified its service agreement with AEPCO to expand the services provided to include electricity and natural gas trade execution services (on an as-agent basis).

Furthermore, on October 1st, 2011, AEPCO will begin providing trade execution services to the Central Arizona Water Conservation District (CAWCD) to support approximately 475MW of peak load, in addition to AEPCO’s existing 575MW of firm peak load. ACES, as AEPCO’s agent in the WECC market, will play a pivotal role in supporting AEPCO’s service agreement with CAWCD, including expanding the trading operations at the new WRTC.

Patrick Ledger, Executive Vice President and CEO of AEPCO stated “Our Board and senior management thoroughly evaluated the decision to leverage our membership in ACES more fully. We feel that blending our existing trading staff into the ACES culture will result in a more efficient and sophisticated trading operation and will benefit AEPCO’s members and customers for a long time to come.”

“Establishing a Regional Trading Center in Arizona has benefits for both ACES and AEPCO. It meets our strategic goal of expanding our business in the West while assisting AEPCO with their business goals,” explained David J. Tudor, President and CEO of ACES.

AEPCO owns and operates the 600 MW (gross rated) Apache generating station in Cochise, Arizona, east of Benson and south of Willcox. AEPCO is the generating entity of Arizona’s G&T Cooperatives ( which also includes Southwest Transmission Cooperative, Inc., (SWTC), the transmission side of operations, and Sierra Southwest Cooperative Services, Inc., (Sierra) which provides the manpower and support services for the three cooperatives. . Arizona’s G&T Cooperatives are members of Touchstone Energy ( with “The Power of Human Connections.”

Questions for Arizona Electric Power Cooperative can be directed to Geoff Oldfather, Communications and Public Relations Manager at (520) 586-5465 or