Mid-Atlantic Interstate Transmission, LLC Submits Filing with Federal Energy Regulatory Commission

Strategic Insights -

Mid-Atlantic Interstate Transmission, LLC (MAIT) has submitted a filing to the Federal Energy Regulatory Commission (FERC) for two interconnection agreements and a notice of cancellation. The filing, submitted through PJM on behalf of MAIT, includes Service Agreement No. 7182 (SA No. 7182) and Service Agreement No. 7356 (SA No. 7356) between MAIT and Keystone Appalachian Transmission Company (KATCo) and The Potomac Edison Company (Potomac), respectively. The filing also includes a notice of cancellation for Service Agreement No. 5049 (SA No. 5049) between MAIT, KATCo, and Potomac.

Key Takeaways:

  • MAIT is a stand-alone transmission company that owns, operates, and maintains transmission facilities in eastern and south central Pennsylvania.
  • MAIT is a wholly-owned subsidiary of FirstEnergy Transmission, LLC and a transmission-owning member of PJM.
  • SA No. 7182 is an interconnection agreement between MAIT and KATCo to add additional delivery points, superseding the previous agreement entered into on July 19, 2024.
  • SA No. 7356 is a new interconnection agreement between MAIT and Potomac to interconnect on MAIT's transmission system.
  • The notice of cancellation for SA No. 5049 is submitted due to the parties entering into new interconnection agreements for the same interconnection points.
  • MAIT has consulted with KATCo and Potomac and reports that neither entity opposes the filing.
  • MAIT requests that the Commission grant an effective date of September 27, 2025, for SA No. 7182, SA No. 7356, and the notice of cancellation for SA No. 5049.
  • The filing includes a transmittal letter, service agreements, signature pages, and other supporting documents.

Statistics:

  • 61-day waiting period for Commission approval (Section 205 of the Federal Power Act)
  • September 27, 2025, proposed effective date for SA No. 7182, SA No. 7356, and the notice of cancellation for SA No. 5049
  • 2 interconnection agreements (SA No. 7182 and SA No. 7356) and 1 notice of cancellation (SA No. 5049)
  • MAIT's transmission facilities are subject to the functional control of PJM, serving customers under the PJM Open Access Transmission Tariff
  • (405) 423-7231: contact number for Deborah Jacobson, Attorney for MAIT

Sources:

  • Federal Energy Regulatory Commission
  • PJM Interconnection, L.L.C.
  • Keystone Appalachian Transmission Company (KATCo)
  • The Potomac Edison Company
  • FirstEnergy Transmission, LLC
  • Deborah Jacobson, Attorney for MAIT (djacobson@firstenergycorp.com)