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The Draft Transmission Programmatic Environmental Impact Statement (EIS) was released on March 31, 2025. To review the document visit the Transmission PEIS webpage. 
There has been an extension to comment on the Draft PEIS until May 15th. If you would like to submit a comment visit our comment database: https://comments.efsec.wa.gov

There are two Special Meetings for the Carriger Solar project set for May 5th and May 6th. For more information, visit the Carriger Solar webpage. 

Columbia Generating Station / Permits / Letter

Columbia Generating Station - - Docket:180299

Process Type Document Group(s) Document link File Date Document Set
Permits Letter
Letter from Department of Ecology regarding NPDES Permit Dehalogenation Chemical Feed Project Engineering Report 06/19/2018 00009
Letter from Department of Ecology regarding NPDES Permit...
Permits Letter
NPDES Administrative Extension 09/13/2019 00100
September 13, 2019 NPDES Administrative Extension
Permits Letter
SWDP Revision 1 Cover Letter 09/14/2021 00110
September 14, 2021 SWDP Temporary permit Revision 1
Permits Letter
NPDES Issuance Letter 05/30/2023 NPDES