The $427m Langley Gulch Power Plant is scheduled for completion in December 2012. The facility is expected to support the company’s goal to augment its baseload volume of power.

The commission said: “The company has a statutory obligation to provide electric service and, since 2004, has forecast a need for a baseload generation resource in 2012.”

The power plant would be constructed on 137 acres of undeveloped range land, which is adjacent to Interstate 84, immediately southwest of Exit 9 in rural Payette County. Idaho Power commenced promoting the project to residents and government officials earlier this year.