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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

EFSEC Document Search

Filter documents by Facility or Post Date.
Format: 06/17/2025
Format: 06/17/2025
Document Group Document Name File Datesort descending
Horse Heaven Wind Farm Appendix 3.16-1 Horse Heaven Wind Farms Proximity to Other Environmental Stressors 12/16/2022
Horse Heaven Wind Farm Chapter 7 - List of Preparers 12/16/2022
Horse Heaven Wind Farm Appendix 4.3-1 Emission Calculations 12/16/2022
Horse Heaven Wind Farm Chapter 8 - Glossary 12/16/2022
Horse Heaven Wind Farm Appendix 4.6-1 GAL 2022 Wind Turbine Wildlife Collision Risk Assessment 12/16/2022
Horse Heaven Wind Farm Chapter 9 - Distribution 12/16/2022
Horse Heaven Wind Farm Appendix 4.10-1 Glare Analysis Inputs and Assumptions 12/16/2022
Horse Heaven Wind Farm Public Notice 12/16/2022
Horse Heaven Wind Farm Cover Letter 12/16/2022
Horse Heaven Wind Farm Appendix 4.11-1 Inputs for Noise Modeling Assessment 12/16/2022
Horse Heaven Wind Farm Chapter 3 - Affected Environment 12/16/2022
Horse Heaven Wind Farm Confederated Tribes of the Colville Reservation DEIS Comment 12/20/2022
Horse Heaven Wind Farm Snoqualmie Indian Tribe First DEIS Comment 12/20/2022
EFSEC general documents December 20, 2022 CANCELED Agenda 12/20/2022
Hop Hill Solar Attachment J - Decommissioning Plan 12/22/2022
Hop Hill Solar Attachment K - Decommissioning Cost Estimate 12/22/2022
Hop Hill Solar Cover Letter 12/22/2022
Hop Hill Solar Attachment L - Draft Habitat Mitigation Plan 12/22/2022
Horse Heaven Wind Farm FECHA DE PUBLICACIÓN DECLARACIÓN PRELIMINAR DE IMPACTO AMBIENTAL 12/22/2022
Hop Hill Solar Application for Site Certification 12/22/2022

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