Idaho Power’s new $45-million Hemingway substation near Melba, Idaho, will be the terminus of two transmission lines. The lines, nearly 1,450 miles long, are components of a proposed 500-kV transmission path from a substation near Boardman, Ore., 300 miles away, and another substation near Glenrock, Wyo., 1,150 miles away.
Transmission lines move electricity from its generation point to power-company customers. Hemingway is a combination of switching, controlling and voltage step-down equipment that reduces the transmission voltage electricity and then distributes it to customers in Idaho’s Treasure Valley.