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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

EFSEC Document

Columbia Solar - TUUSSO Energy - Docket:170823

Process Type Document Group(s) Document link File Date Document Set
Application Letter 20170912_YakamaCulturalAssessment 00043
Yakama Nation Cultural Resources Assessment of Tuusso...
Application Letter WDFW Comments on App Review 00044
Comments on behalf of the Washington Department of Fish and...
Application Letter WDFW Email Cover Letter to Comments on App Review 00044
Comments on behalf of the Washington Department of Fish and...
Application Letter DAHP Comments on App Review 00045
Comments of Department of Archaeology & Historic...
Application Letter Revised DAHP Application Review 03/12/2018 00045
Comments of Department of Archaeology & Historic...
Application Letter Tuusso Response to Cultural Assessment 00048
Response to Feedback on Cultural Resources Assessments on...
Application Letter Data Request 1 Cover Letter 01/17/2018 00077
Data Request # 1 to Applicant for Application.
Application Letter Cover Letter for Redacted Updated CR Reports 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Letter Morgan Excavation Letter 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Letter Updated ASC Cover Letter June 15, 2022 06/15/2022 001
Application Letter Scout Clean Energy Letter - Project Update Responding to Adjudication Concerns 09/25/2023 001
Application Letter Cover Letter 12/22/2022 001
Application Letter Extension Request 11/03/2023 001
Application Letter Badger Mountain ASC Extension Request letter 09/06/2023 001
Original Application
Application Letter Data Request 1 Response Cover Letter 01/26/2018 00101
Email from Applicant with cover letter of response to Data...
Application Letter Letter to Kittitas County requesting meeting 04/30/2018 00177
Letter from Stephen Posner to Neil Caulkins, Kittitas...
Application Letter Letter from Tuusso Energy LLC requesting an extension 05/23/2018 00186
Letter from Tuusso Energy LLC requesting an extension to...
Application Letter Dick Carkner Clarification Request Letter 06/19/2018 00189
Letter from Dick Carkner and Kirk Kirkland, RE:...
Application Letter Response to Dick Carkner 06/25/2018 00192
Response to Dick Carkner/Kirk Kirkland, Save Our Farms,...
Application Letter Notice of Pre-Application Request Letter 12/20/2023 Pre-Application
Application Map Attachment A - Maps 10/07/2021 00001
Original Application
Application Meeting Transcripts Transcript 06/26/2018 00198
Transcript of Special Public Comment meeting June 26, 2018...
Application Notice [No group] Application Notice to Interested Persons 04/15/2022 00004
High Top and Ostrea Application Notice
Application Notice Goose Prairie Informational Meeting and LandUse Consistency Hearing Notice 03/02/2021 00011
Notice for Public Informational Meeting and Land Use Hearing
Application Notice GOOSE PRAIRIE AVISO DE REUNIÓN PÚBLICA INFORMATIVA Y AUDIENCIA DE USO CONGRUENTE DE SUELO 03/16/2021 00011
Notice for Public Informational Meeting and Land Use Hearing
Application Notice Notice of Public Comment 04/01/2024 DraftSCA
Application Notice Pre-Application Info Meeting Notice 01/24/2024 PreAppInfoMtg
Application Plan Pre-Application Plan 12/20/2023 Pre-Application
Application Presentation Pre-App Info Meeting EFSEC Power Point Presentation 02/06/2024 PreAppInfoMtg
Application Presentation Pre-App Info Meeting Cascade Renewable Power Point Presentation 02/06/2024 PreAppInfoMtg
Application Public Comment General Public Comments 001 to 013 00056
Informational Meeting Commenters..
Application Public Comment Public Comment of Dick Carkner 06/26/2018 00191
Speaker sign in list and hard copy document with references...
Application Report Office of State Fire Marshall 3rd Qtr. Report 01/17/2018 00003
Washington State Patrol - Office of the State Fire Marshal...
Application Report Redacted Updated Camus CR Report 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Report Redacted Updated Fumaria CR Report 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Report Redacted Updated Penstamon CR Report 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Report Redacted Updated Typha CR Report 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Report Redacted Updated Urtica CR Report 01/26/2018 00078
Response to Data Request #1 on behalf of TUUSSO Energy, LLC...
Application Report Carriger Solar Amended Wetlands and Waters Report Part 1 08/01/2024 001
Application Report Carriger Solar Amended Wetlands and Waters Report Part 2 08/01/2024 001
Application Report Carriger Solar Visual Impact Assessment 04/18/2023 04/18/2023 001
Application Report Revised Carriger Solar Visual Impact Assessment 07/16/2024 07/16/2024 001
Application Report Updated Carriger Solar Figure 9 Wildlife Corridors 01/14/2025 001
Application Report Updated Carriger Solar Figure 7 Waters 01/14/2025 001
Application Report Carriger Solar Cover Letter 04/11/2025 001
Application Report Carriger Solar Combined Figures 04/11/2025 001
Application Response 2021 Botany and Habitat Survey Report – August 2021 09/10/2021 00050
Updated and Supplemental Reports to the ASC
Application Response Response from Kittitas County RE: Meeting Request 04/30/2018 00177
Letter from Stephen Posner to Neil Caulkins, Kittitas...
Application SCA (Site Certification Agreement) Draft SCA 04/01/2024 DraftSCA
Application SCA (Site Certification Agreement) Draft SCA Appendix - Mitigation Measures 04/01/2024 DraftSCA

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