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​Project Overview
BPA proposed to build a 500-kilovolt (kV) lattice-steel-tower transmission line that would have run from a new 500-kV substation near Castle Rock, Wash., to a new 500-kV substation near Troutdale, Ore. After initially identifying a large number of route segments, BPA combined those segments into four action alternatives (each with options): West, Central, East, and Crossover. The action alternatives and the No Action Alternative were analyzed in the project's environmental impact statement.
BPA’s preferred alternative was the Central Alternative using Central Option 1. BPA accepted comments on the draft EIS from Nov. 13, 2012 through March 25, 2013. BPA responded to all comments received and documented them in Volume 3 (Volume 3A through 3H) of the final EIS. The comments and responses can also be searched online. 
Project decision
BPA Administrator Elliot Mainzer announced his decision to not build the project on May 18, 2017. The decision concludes a comprehensive public process to determine whether building a new transmission line was the best solution to address an electrical reliability issue along a transmission corridor in southwestern Washington and northwestern Oregon. The decision to not build the transmission line reflects BPA’s commitment to implement new planning and management of its transmission system and commercial business practices. You can read more in BPA's letter to the region.