J. Lamar Stall Unit at Arsenal Hill

SWEPCO's J. Lamar Stall Unit at Arsenal Hill, a 508-megawatt (MW) combined-cycle natural gas unit, began commercial operation in June 2010. The Stall Unit was strategically placed at the Arsenal Hill Power Plant location in Shreveport, La., to serve SWEPCO's customers in three states and to access existing natural gas pipelines and electric transmission lines.

Combined-cycle plants generate electricity more efficiently and consume less fuel per kilowatt-hour of output than conventional gas-fueled generators. The Stall Unit generates electricity with a gas-fueled turbine and recovers exhaust heat from that process to produce additional electricity in a steam turbine.

SWEPCO announced the Stall Unit as part of its new generation plans in May 2006. The plans also included 300 MW of natural gas peaking generation from the Harry D. Mattison Power Plant in Northwest Arkansas, which came on line in 2007, and 440 MW (SWEPCO's ownership share) of coal-fueled base load generation from the 600-MW John W. Turk, Jr. Power Plant, which began commercial operation in December 2012. As an intermediate load facility, the Stall Unit provides power that is quickly available as customers' usage increases or decreases between base load (24/7 power available to meet basic system needs) and peak load (the highest demand on the electric system, such as summer afternoon).

Location: Shreveport, La.
Capacity: 508 megawatts (MW)
Fuel: Natural gas
Technology: Combined-cycle
Owner/Operator: SWEPCO
Commercial Operation Date: June 16, 2010
Named For: J. Lamar Stall, SWEPCO President & CEO, 1971-1983