One third less energy produced, and that is supposed to be a good thing?
check it out:

The largest coal-fired power plant in the West will produce one-third less energy by 2020 and is on track to cease operations in 2044 under a proposal that the federal government adopted to cut haze-causing emissions of nitrogen oxide at places like the Grand Canyon.

The U.S. Environmental Protection Agency announced Monday that the owners of the Navajo Generating Station could either shut down one of the plant’s 750-megawatt units or reduce power generation by an equal amount by 2020. The owners would have until 2030 to install pollution controls that would cut nitrogen-oxide emissions by 80 percent.