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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: 06/14/2025
Format: 06/14/2025
Document Group Document Name File Datesort ascending
High Top and Ostrea Solar Project Cypress Creek Renewables CUP Presentation 01/11/2023
Horse Heaven Wind Farm Cumulative Effects to Birds, Bats, and Land Cover from Renewable Energy Development in the Columbia Plateau Ecoregion of Eastern Oregon and Washington 01/09/2023
Horse Heaven Wind Farm Yakima Nation Consultation Request 01/05/2023
Horse Heaven Wind Farm Updated ASC Appendix G - Shadow Flicker Analysis 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix H - Glare Analysis Report 12/29/2022
Horse Heaven Wind Farm Updated Application for Site Certification (ASC) 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix L - Habitat Mitigation Plan 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix J - Water Source Documentation 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix M - Bird and Bat Conservation Strategy 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix N - Revegetation and Noxious Weed Control Plan 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix O - Acoustic Modeling Results by Noise Sensitive Receptor 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix A - Decommissioning Plan 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix P - Emergency Response Plan 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix B - Preliminary Geotech Report 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix S - Economic Impact Assessment 12/29/2022
Horse Heaven Wind Farm Updated Appendix K - REDACTED Biological Reports (Revised) 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix C - SEPA Checklist 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix T - Notice for Intent for National Pollutant Discharge Elimination System (NPDES) 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix D - Planning Determination 12/29/2022
Horse Heaven Wind Farm Updated ASC Appendix I - Wetlands Water Delineation Report 12/29/2022

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