BPA is proposing to build a new 115-kilovolt (kV) transmission line and a new 138/115-kV substation, called Hooper Springs Substation in Caribou County, Idaho. The new transmission line and substation are needed to improve voltage stability on the transmission grid and to meet future load growth. BPA completed a preliminary environmental assessment for Hooper Springs in 2009, but will now prepare an environmental impact statement (EIS).
BPA accepted comments on the scope of the EIS through Aug. 9, 2010. BPA will prepare a draft EIS which would be available for public comment in summer 2012. BPA expects to release a final EIS addressing all public comments. If BPA and cooperating agencies decide to permit and build the line, construction could begin as early as 2013.