Bonneville Power Administration Bulletin, May 2014. (See page 1 of the PDF.)
http://www.bpa.gov/news/pubs/Journal/Journal-201405-May-2014.pdf

"BPA will begin constructing the Central Ferry-Lower Monumental transmission line this month. The new line is expected to carry more than 800 megawatts of renewable wind energy, enough to power about half a million Northwest homes when the wind is blowing."