WNP-1 and WNP-4 were, along with the Columbia Generating Station (formerly called WNP-2) and WNP-3 and WNP-5, two of the five nuclear power plants on which construction was started by Energy Northwest in the 1970s. In the end, WNP-1 was mothballed when 63% constructed, WNP-3, -4, and -5 abandoned, and only the Columbia Generating Station was completed and operated. WNP-1 and -4 are located on the Hanford Reservation in the U.S.