Pacific Intertie (1970)
The federal government built a 846-mile high-voltage direct current transmission line from the Columbia River dams in Oregon to Los Angeles, connecting the hydropower-rich Pacific Northwest to Southern California's growing electricity demand. At the time, it was the world's longest HVDC line.
Los Angeles gained access to cheap hydroelectric power, reducing dependence on local fossil fuel generation.
The Pacific Intertie remains operational today, transmitting up to 3,100 megawatts and serving as a model for long-distance renewable energy transmission.
SunZia follows the Pacific Intertie template: connecting remote renewable resources to distant urban markets via HVDC technology. The six-year timeline from authorization to operation in the 1960s contrasts sharply with SunZia's 17-year development cycle.
