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  • BP-24 Rate Case
  • BP-22 Rate Case
  • BP-22 Rates Settlement Implementation
  • TC-25 Tariff Proceeding
  • TC-24 Tariff Proceeding
  • TC-22 Tariff Proceeding
  • TC-20 Tariff Proceeding
  • Historical Rate Cases

TC-25 Tariff Proceeding

Section 9 of the Bonneville Power Administration's (Bonneville) Open Access Transmission Tariff (Tariff) provides that Bonneville's Administrator may use the procedures set forth in Section 212(i)(2)(A) of the Federal Power Act to modify terms and conditions of the Tariff. On Nov. 7, 2023, BPA initiated the TC-25 Tariff Proceeding to propose modifications to the Standard Large Generator Interconnection Procedures (LGIP) in the Tariff.

On Jan. 26, 2024, BPA issued the Administrator's Final Record of Decision in the proceeding. The Final ROD adopts the TC-25 Settlement Agreement, which includes the modified Standard Large Generator Interconnection Procedures (LGIP) and a new attachment for the transition process to the modified LGIP in BPA’s Open Access Transmission Tariff. The modified Tariff has an effective date of Jun. 30, 2024.

With publication of the Final ROD, BPA has concluded the TC-25 tariff proceeding. Official filings related to the proceeding are posted on the TC-25 secure website

Information on the implementation of the modified LGIP, transition process, and other Generator Interconnection Reform efforts will be available on BPA’s Generator Interconnection webpage

Information on the TC-25 Settlement Agreement commitments will be available on BPA’s TC-25 Settlement Commitments webpage. 

Tariff webpage to view BPA's current Tariff.

TC-25 Tariff Settlement Proposal (September 1, 2023)

In June 2023, BPA initiated discussions with customers and stakeholders regarding the potential for settlement of the TC-25 tariff proceeding to reform BPA’s LGIP. Based on the progress in the settlement discussions, BPA staff developed the below settlement proposal.

  • TC-25 Settlement Agreement (Sept. 1, 2023) includes:
  • Appendix 1, Terms; and
  • Appendix 2: Bonneville’s Attachment L and Attachment R to the Open Access Transmission Tariff (Corrected Oct. 13, 2023)
    • Redline comparison of corrected Appendix 2 posted Oct. 13, 2023 to Appendix 2 posted Sept. 1, 2023
    • List of corrections to Appendix 2 posted Oct. 13, 2023
    • Appendix 2: Bonneville’s Attachment L and Attachment R to the Open Access Transmission Tariff (Sept.1, 2023 version) 

Prospective parties to the TC-25 tariff proceeding were asked to notify BPA of any objection by 5 p.m. on Friday, Sept. 15, 2023. BPA received no responses objecting to the proposed TC-25 tariff settlement. BPA staff is recommending the adoption of the TC-25 Settlement Agreement in the TC-25 Tariff Proceeding.

Since posting the proposed settlement agreement, BPA staff discovered several typographical errors that are necessary to correct in the tariff filed as part of the TC-25 Initial Proposal. A corrected Appendix 2 to the settlement agreement is posted above for interested parties to review in advance of the Initial Proposal filing. Additionally, a redline comparison to the Sept. 1, 2023 version, as well as a list describing the corrections are posted above for reference.

 

TC-25 Pre-Proceeding Workshop Schedule (updated 5/12/2023 with revised workshop schedule on May 18, 2023 Customer Led Workshop from 9:00 a.m. to 12:00 p.m. will be Virtual Only)

June 15, 2023

TC-25 Workshop

  • Time
  • Agenda June 15
  • TC-25 Workshop Presentation (updated June 15, 2023) 
  • Supplemental Materials - ALIS TLRS:Nortwest, TLR Allocations Starter, TLR Allocations Outage

May 25, 2023

TC-25 Workshop

  • Time
  • Agenda May 25
  • TC-25 Workshop Presentation (Updated v2.0 5/25/2023)

 

May 18, 2023

TC-25 Customer-Led Workshop (materials will be posted when received) 

  • Time
  • Agenda May 18
  • NewSun Energy
  • Savion Presentation (Updated 5/17/2023)
 

April 26 and 27, 2023

TC-25 Workshop

  • Time
  • Agenda April 26 and 27
  • TC-25 Workshop Presentation (Updated 4/27/2023)

 

April 21, 2023

TC-25 Customer-Led Workshop

  • Time
  • Agenda April 21
  • NIPPC Presentation (Updated 4/21/2023
  • NewSun Presentation (Updated 4/25/2023)
  • Scout Presentation

 

March 15 and 16, 2023

TC-25 Workshop 

  • Time
  • Agenda March 15
  • Agenda March 16
  • TC-25 Workshop Presentation (updated 3/14/2023 with revised workshop schedule and slides 13 and 14)
  • Supplemental Materials: Transition Process Overview

 

February 16, 2023

TC-25 Kickoff Meeting

  • Time
  • Agenda
  • TC-25 Kickoff Meeting Presentation (updated 2/28/2023 with revised workshop schedule and contact information)

 

TC-25 Pre-Proceeding Workshop (June 2, 2023 Feedback Deadline)

The following were submitted in response to BPA's request for feedback on topics presented at the TC-25 workshop on May 25, 2023. Materials will be posted when received.
  • Clearway Energy Group 
  • Cypress Creek Renewables
  • Gallatin Power
  • NewSun Energy
  • NIPPC
  • Pine Gate Renewables
  • Public Power Council
  • Renewable Northwest
  • Seattle City Light
  • Shell Energy

TC-25 Pre-Proceeding Workshop (May 12, 2023 Feedback Deadline)

The following were submitted in response to BPA's request for feedback on topics presented at the TC-25 workshop on Apr. 26 - 27, 2023. Materials will be posted when received. 
  • BrightNight Power
  • Clearway Energy Group
  • Cypress Creek Renewables
  • Gallatin Power
  • NewSun Energy
  • NIPPC
  • Pine Gate Renewables
  • PNGC Power
  • Public Power Council
  • Renewable Northwest
  • Savion
  • Seattle City Light
  • wpd Wind Projects
  • Amazon Energy (added 5/25/2023)
  • PNGC (added 5/25/2023) 

 TC-25 Pre-Proceeding Workshop (Mar. 30, 2023 Feedback Deadline)

The following were submitted in response to BPA's request for feedback on topics presented at the TC-25 workshop on Mar. 15 -16, 2023
  • ASI
  • NIPPC
  • NRU
  • Pine Gate Renewables
  • Renewable NW
  • Scout Clean Energy
    • Energy Storage Resources Attachment A Annex
  • Seattle City Light
  • Wpd

TC-25 Kick-of Workshop (Mar. 2, 2023 Feedback Deadline)

The following were submitted in response to BPA's request for feedback on topics presented at the TC-25 workshop on Feb.16, 2023
  • NIPPC
  • Seattle City Light
Bonneville Power Administration
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