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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: 06/19/2025
Format: 06/19/2025
Document Groupsort descending Document Name File Date
Horse Heaven Wind Farm DEIS_0001-0100 02/13/2023
Horse Heaven Wind Farm Notice of Public Comment 04/01/2024
Horse Heaven Wind Farm Chapter 1 - Project Background and Purpose 12/16/2022
Horse Heaven Wind Farm Ch.5 Cumulative Impacts - Final EIS 10/31/2023
Horse Heaven Wind Farm Updated ASC Appendix H - Glare Analysis Report 06/15/2022
Horse Heaven Wind Farm Bonneville Power Administration SEPA Scoping Comment 06/02/2021
Horse Heaven Wind Farm Council Member Agencies Notification 02/17/2021
Horse Heaven Wind Farm EXH-5502_T Revised Pre-filed testimony Richard Simon Curriculum Vitae 08/25/2023
Horse Heaven Wind Farm EXH-1048 - Weaver et al. (2020) 08/23/2023
Horse Heaven Wind Farm Tri-Cities C.A.R.E.S. Reply to Applicant’s Response to Motion to Stay Pending FEIS Issuance 05/31/2023
Horse Heaven Wind Farm EXH-2001_T Pre-Filed Testimony of Greg Wendt 08/15/2023
Horse Heaven Wind Farm DEIS_1601-1700 02/13/2023
Horse Heaven Wind Farm December 20, 2023 Mitigation Measures 12/20/2023
Horse Heaven Wind Farm Updated ASC Appendix B - Preliminary Geotech Report 12/29/2022
Horse Heaven Wind Farm Appendix 4.11-1 Noise Modeling Assessment - Final EIS 10/31/2023
Horse Heaven Wind Farm Council Exclusion Considerations 1 through 4 01/22/2024
Horse Heaven Wind Farm Data Request Table 07/22/2021
Horse Heaven Wind Farm Counsel for the Environment appoints Bill Sherman 03/01/2021
Horse Heaven Wind Farm Refiled By Order As Public Comment: EXH-5611_T - Pre-Filed Testimony of TCC Witness Christopher S. Wright 09/07/2023
Horse Heaven Wind Farm EXH-1039_REVISED - CohnReznick, Property Value Impact Report: Site Specific Analysis 08/23/2023

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