TransCanada Pipelines Limited Seeks Intervener Status in Great Lakes Gas Transmission Rate Case

TransCanada Pipelines Limited, a company incorporated under the laws of Canada, has submitted a document to the Federal Energy Regulatory Commission (FERC) requesting intervenor status in the Great Lakes Gas Transmission Limited Partnership's (GLGT) Section 4 rate case. The submission, made on September 10, 2025, argues that TransCanada has a substantial interest in the proceedings due to its large contract holdings of GLGT capacity and its operations as an interconnecting pipeline operator with GLGT.

Key Takeaways:

• TransCanada Pipelines Limited is a Canadian company that owns and operates a high-pressure natural gas transmission system from Alberta to Ontario and Quebec.
• The company has a substantial interest in GLGT's Section 4 rate case due to its large contract holdings of GLGT capacity (approximately 802,000 Dth/d).
• TransCanada has not been informed of GLGT's rate case filing, which has resulted in a lack of transparency and potential prejudice in its contract renewal decisions.
• Granting intervenor status to TransCanada would allow it to participate in the proceeding and make informed decisions on GLGT transportation rates.
• The company confirms that it will accept the existing record of the proceeding and will not impose additional burdens on existing parties if its intervention is permitted.

Statistics:

• 802,000 Dth/d: the amount of firm capacity on GLGT that TransCanada contracts for and uses to provide integrated services to its pipeline customers.
• 100%: the ownership stake of TC Energy in TransCanada, as well as its affiliate GLGT.
• 4/30/2025: the date on which GLGT submitted its Section 4 rate case filing.
• 9/10/2025: the date on which TransCanada submitted its out-of-time motion to intervene in the proceeding.

Sources:

• Federal Energy Regulatory Commission: Submission Description (doc-less) Out-of-Time Motion to Intervene of TransCanada Pipelines Limited under RP25-855-000.