Energy Northwest
（重定向自WPPSS）
Energy Northwest (formerly Washington Public Power Supply System) is a United States public power joint operating agency formed by State law in 1957 to produce at-cost power for Northwest utilities. Headquartered in Richland, Washington, the WPPSS became commonly known as "Whoops" due to over-commitment to nuclear power in the 1970s which brought about financial collapse and the second largest municipal bond default in U.S. history. WPPSS was renamed Energy Northwest in November 1998. Agency membership includes 28 public power utilities, including 23 of the State’s 24 public utility districts.