Each year, Tri-State develops a 10-year transmission plan that assesses future transmission needs for Tri-State’s 41 member systems. The transmission component of this plan is developed in conjunction with West Connect and the Colorado Coordinated Planning Group (CCPG), formal regional transmission planning organizations recognized by the Western Electricity Coordinating Council (WECC).
As part of the Colorado Public Utilities Commission (COPUC), Rule 3627, Tri-State files its 10-year transmission plan with the COPUC on a biennial basis each February 1.
For more information, to send us your questions or comments regarding our transmission plans, or to be added to the stakeholder outreach list for future transmission planning meetings, please email TransmissionPlanning@tristategt.org.
Please email us your comments on Tri-State's transmission planning to TransmissionPlanning@tristategt.org.
In your comments, please include:
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First and last name
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Mailing address
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Phone number(s)
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Name of your organization
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Indicate if you are member of an electric cooperative, and if so, which one.
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Please indicate which issue/project you are commenting about
Thank you for your interest.
Filing Details PUC 3627
Details included in the filing for the Colorado PUC Rule 3627 on February 1, 2024:
2024 Rule 3627 Combined 10-Year Report
Appendix A - Colorado Transmission Maps
Appendix B - Denver-Metro Transmission Map
Appendix C - Black Hills Energy Transmission Map
Appendix D - Black Hills Project Sheets
Appendix E - Tri-State Project Sheets
Appendix F - Public Service Projects
Appendix G - CSU Appendix Projects
Appendix J - CCPG Stakeholder Process
Appendix K - Public Service Stakeholder Comment
Appendix L - Black Hills Stakeholder Comments
Appendix M - CCPG Stakeholder Comments (Tri-State)
Appendix N - Black Hills Supporting Documents
Appendix O - Tri-State Supporting Documents
Appendix P - Public Service Supporting Documentation
Appendix Q - How to Access Model Data
Past filings
COPUC 3627 transmission projects and reference documents - 2022 filing
COPUC 3627 transmission projects and reference documents - 2020 filing
COPUC 3627 transmission projects and reference documents - 2018 filing
COPUC 3627 transmission projects and reference documents - 2016 filing