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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 / docGroup

Columbia Generating Station - - Docket:180299

Process Type Document Group(s) Document link File Date Document Set
Permits Application
Application for Renewal of NPDES Permit No. WA002515-1 04/30/2019 00083
CGS NPDES Permit Modification 2019 (Hard copy rec'd 05...
Permits Comment
001_Energy Northwest 03/16/2023 023
Permits Comment
002_Department of Natural Resources 03/23/2023 023
Permits Documents
NPDES Permit Modification Fact Sheet Errata No. 2 03/19/2019 00083
CGS NPDES Permit Modification 2019 (Hard copy rec'd 05...
Permits Documents
NPDES Permit Modification Fact Sheet Amendment No.2 03/19/2019 00083
CGS NPDES Permit Modification 2019 (Hard copy rec'd 05...
Permits Documents
Columbia Generating Station NPDES Fact Sheet Draft 02/16/2023 023
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
Permits Notice
Columbia Generating Station NPDES Permit Draft Notice 02/16/2023 023
Permits NPDES (Nat'l Pollution Discharge Elim Sys Permit
Columbia Generating Station NPDES Permit Draft 02/16/2023 023
Permits Permit
NPDES Permit Effective dates 4/9/2001 - 4/9/2006 04/09/2001 00034
Permits for the Columbia Generating Station
Permits Permit
NPDES Permit Effective dates 05/25/2006 - 05/25/2011 05/25/2006 00034
Permits for the Columbia Generating Station
Permits Permit
NPDES Permit Effective Dates 09/30/2014 - 10/31/2019 11/01/2014 00034
Permits for the Columbia Generating Station
Permits Permit
2019 NPDES Permit Modification 03/19/2019 00083
CGS NPDES Permit Modification 2019 (Hard copy rec'd 05...
Permits Permit
Temporary State Waste Discharge Permit Revision 1 09/14/2021 00110
September 14, 2021 SWDP Temporary permit Revision 1
Permits Permit
NPDES Fact Sheet 05/30/2023 NPDES
Permits Permit
NPDES Permit 05/30/2023 NPDES