TC Energy expanding Columbia Gas system with 800-MMcfd Appalachia Supply project

TC Energy Corp. will expand its Columbia Gas pipeline system via the 800-MMcfd Appalachia Supply Project. The US$1.5-billion project is designed to supply new natural gas-fired power generation using additional Marcellus shale production and has a 2030 anticipated in-service date.

“Sustained growth in natural gas and power demand in the US continues to translate into attractive investment opportunities across our diversified portfolio,” said TC Energy president and chief executive officer François Poirier. “Consistent with our capital allocation priorities, we have announced a strategic expansion project on our Columbia Gas system that reinforces visibility to incremental growth into the next decade.”

Appalachia Supply is supported by a 20‑year take‑or‑pay contract backed by an investment‑grade utility and is expandable to 2 bcfd via additional compression and minor modifications. TC Energy executive vice-president and chief operating officer Tina Faraca said in the company’s first-quarter 2026 earnings call that it anticipates gas demand in the project’s footprint to grow by about 4 bcfd through 2035.  

TC Energy had first-quarter 2026 net income of C$899 million (US$660 million), down 7.8% from a year earlier. It reported comparable earnings of C$1 billion (C$0.99/common share) compared with C$1 billion (C$0.95/common share) in first-quarter 2025.