TOP PLANTS West County Energy Center, Palm Beach County, Florida Owner/Operator: Florida Power & Light Co. The 3,600-MW West County Energy Center, with two recently commissioned power blocks and a third just entering start-up, is the first " greenfield " combined-cycle plant constructed by FPL since the 1970s. Thanks to FPL's long history with repowering projects, the project team commissioned Unit 2 seven months early, with no operator errors during start-up. At just over $600/kW, the cost of the plant was a bargain.http://www.powermag.com