As reported, the 472MW power unit was shut for planned reasons.
Located in Redlands in San Bernardino County, the 944MW Mountainview power station has two 472MW combined-cycle units 3 and 4. Each unit has two 142MW combustion turbines. The units entered service in 2005 and 2006.
Southern California Edison is an electric utility, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.
Headquartered in Rosemead, California, Edison International, through its subsidiaries, generates and distributes electric power and invests in infrastructure and energy assets.