DOE’s Bonneville Power Administration (BPA) prepared an EIS that evaluates the potential environmental impacts of the proposed Kangley-Echo Lake Transmission Line Project in King County, Washington. The proposal includes constructing and operating a new 500-kilovolt (kV) transmission line from a tap point on an existing 500-kV line near Kangley, Washington, to BPA’s existing Echo Lake Substation, and expanding and modifying that substation to accommodate the proposed new transmission line.