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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. 

The Carriger Solar Draft Order #899 is available for comment April 29th through May 1st 11:59 pm. You can see the Draft Order under the "Orders" header towards the bottom of the Carriger Solar webpage.  

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. 

If you would like to submit a comment for either of the above visit our comment database: https://comments.efsec.wa.gov

Horse Heaven Wind Farm / SEPA

Horse Heaven Wind Farm - Horse Heaven Wind Farm - Docket:210011

Process Type Document Group(s) Document link File Date Document Set
SEPA Letter
Title Page - Final EIS 10/31/2023 FEIS
SEPA Map
Data Request 2 Topographical Earth Maps 09/10/2021 00044
Data Request 2
SEPA Map
Figure X0.1-1 Turbine Layout Option 1 01/22/2024 FEIS
SEPA Map
Figure X0.1-2 Turbine Layout Option 2 01/22/2024 FEIS
SEPA Map
Council Exclusion Considerations 1 through 4 01/22/2024 FEIS
SEPA Map
Figure X0.2-1 Turbine Layout Option 1 01/22/2024 FEIS
SEPA Map
Figure X0.2-2 Turbine Layout Option 2 01/22/2024 FEIS
SEPA Map
Figure X0.3-1 Turbine Layout Option 1 01/22/2024 FEIS
SEPA Map
Figure X0.3-2 Turbine Layout Option 2 01/22/2024 FEIS
SEPA Map
Figure X0.4-1 Turbine Layout Option 1 01/22/2024 FEIS
SEPA Map
Figure X0.4-2 Turbine Layout Option 2 01/22/2024 FEIS
SEPA Notice
Public Notice 12/16/2022
SEPA Notice
Notice - SEPA Determination of Significance and Request for Comments on Scope of Environmental Impact Statement 05/11/2021 00027
SEPA Scoping Notice
SEPA Notice
Horse Heaven DEIS Public Comment Meeting Notice 01/20/2023 001
SEPA Notice
Notice - Final EIS 10/31/2023 FEIS
SEPA Notice
Notice - Final EIS Special Meeting 11/16/2023 FEIS
SEPA Presentation
Draft EIS Overview Presentation 11/15/2022
SEPA Presentation
Mitigation Presentation - Final EIS Special Meeting 11/29/2023 FEIS
SEPA Presentation
October 18 2023 FEIS Presentation 10/18/2023 FEIS Presentation
SEPA Presentation
November 15 2023 FEIS Presentation 11/15/2023 FEIS Presentation
SEPA Presentation
December 20, 2023 Mitigation Changes - Applicant 12/20/2023 FEIS Presentation
SEPA Presentation
December 20, 2023 Mitigation Changes - Council 12/20/2023 FEIS Presentation
SEPA Response
Data Request 1 Response 07/01/2021 00043
Data Request 1
SEPA Response
Data Request Response 2 Supplemental Response 1 09/10/2021 00044
Data Request 2
SEPA Response
Data Request 2 Response 2 Vegetation Impacts 09/10/2021 00044
Data Request 2
SEPA Response
Data Request 2 Response 2 Attachment Wildlife 09/10/2021 00044
Data Request 2
SEPA Response
2021 Botany and Habitat Survey Report – August 2021 09/10/2021 00044
Data Request 2
SEPA Response
Data Request 2 Visual 09/20/2021 00044
Data Request 2
SEPA Response
Data Request 3 Response 2 09/10/2021 00045
Data Request 3
SEPA Response
Response to Data Request 7 04/21/2023 001
SEPA Transcript
DEIS Public Comment Meeting Minutes 02/01/2023 Transcripts
SEPA Transcript
Horse Heaven FEIS Special Meeting Transcript 11/29/2023 Transcripts

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