Midcontinent Independent System Operator Submits Amended Project Commitment Agreement

Strategic Insights -

The Midcontinent Independent System Operator (MISO) has submitted an Amended Project Commitment Agreement to the Federal Energy Regulatory Commission (FERC) regarding the American Transmission Company LLC (ATC). The agreement, dated September 22, 2025, updates the project scope and costs for the Project Granite, a new transmission and substation facility. The MISO has designated the Amended PCA as the First Revised Service Agreement No. 4451 under MISO's FERC Electric Tariff, Fifth Revised Vol. No. 1 (Tariff).

Key Takeaways:

  • The Amended Project Commitment Agreement updates the project scope and costs for the Project Granite, a new transmission and substation facility.
  • The agreement was executed on September 22, 2025, and is tendered for filing with the FERC on October 14, 2025.
  • The proposed effective date of the Amended PCA is October 15, 2025, and MISO respectfully requests that the Commission waive its sixty-day notice requirement under Section 35.3(a) of the Commission's regulations.
  • The Amended PCA provides an update to the Project scope and costs, described in Exhibit A of the Amended PCA.
  • The Parties request an effective date of the next day after the filing date, October 15, 2025, as discussed below.
  • The Amended PCA includes minor administrative updates to the terms of the agreement, including updating and removing unnecessary or outdated language.
  • If the Project moves forward, work on the Project will be performed pursuant to the DTIA between the parties.
  • If the Project would not proceed, ATC could request reimbursement of costs, pursuant to the Amended PCA, and would invoice WEPCO for reimbursement of Project costs actually incurred.

Statistics:

  • The MISO has over 10,000 miles of jurisdictional transmission facilities in the states of Wisconsin, Illinois, Minnesota, and Michigan.
  • The Amended PCA was executed on September 22, 2025.
  • The proposed effective date of the Amended PCA is October 15, 2025.
  • The Parties request an effective date of the next day after the filing date, October 15, 2025.
  • The project has not commenced service, and service will only commence if the project is canceled.

Sources:

1. Federal Energy Regulatory Commission - Docket ER26- (October 14, 2025)

2. Midcontinent Independent System Operator, Inc. - First Revised Service Agreement No. 4451 under MISO's FERC Electric Tariff, Fifth Revised Vol. No. 1 (Tariff)

3. American Transmission Company LLC - Docket No. ER25-1334 (March 26, 2025)

4. Midcontinent Independent System Operator, Inc. - Attachment FF-ATCLLC (February 1, 2002)

5. Federal Energy Regulatory Commission - 18 C.F.R. Part 35

6. Wisconsin Electric Power Company - First Amended and Restated Distribution-Transmission Interconnection Agreement (DTIA)