Whakakiia te rerenga e whai ake nei: Kaua e pohehe te WNP-1/4 me te WNP-2 (ko Columbia Generating Station inaianei) me te tipu Skagit / Hanford kua whakaarohia. Ko Skagit / Hanford he tono i ahu whakamua e te roopu o nga taputapu i arahina e Puget Sound Power & Light (40% hea) ka uru atu ki a Portland General Electric (30%), Pacific Light and Power (20%) me Washington Water Power (10%) ki te hanga i tetahi tipu e rua-waewae ki te raki o Seattle i te Raorao Skagit. Ko te wāhi o Skagit i runga ake tonu i tētahi hapa nui o te ru. I muri i te
I te aitua o Three Mile Island i te tau 1979, i akiaki nga kaipōti o Skagit County i te roopu ki te neke i te tipu Skagit kua whakaarohia ki te papaanga o Hanford. Kaore a Skagit / Hanford i neke atu i nga waahanga hoahoa hangarau tuatahi i mua i te whakakorenga o te tipu. He pūrongo 1978 a Battelle Northwest i kī ai ka taea e te pae o Hanford te tautoko i te rua tekau, neke atu rānei o ngā pūkaha karihi.