Enbridge begins construction on Tennessee’s 122-mile Ridgeline gas pipeline
(UI) — Enbridge Inc. has begun construction on its Ridgeline Expansion Project, a 122-mile natural gas pipeline expansion of the company’s East Tennessee Natural Gas (ETNG) system designed to serve the Tennessee Valley Authority’s (TVA) planned natural gas replacement of the Kingston Fossil Plant, according to an Oct. 20 update on the project.
According to Enbridge, Ridgeline has received all necessary regulatory certificates and permits, including a FERC Notice to Proceed earlier this month. Construction is scheduled to continue through 2026, with in-service targeted for November 2026 and full restoration expected by spring 2027.
The project involves installing 122 miles of 30-inch looping pipeline and one electric-powered compressor station. Enbridge said 91% of the new route will parallel existing rights-of-way to minimize land and environmental impacts. In addition, about 80 acres of solar panels will be installed to offset the project’s operational energy use.
Enbridge emphasized that the project will “provide affordable and cleaner energy” to TVA customers and represents a multi-year collaboration that included multiple rounds of public input and environmental review.
Once complete, Ridgeline will enhance the ETNG system’s capacity and reliability across the Tennessee Valley, supporting TVA’s transition away from coal and toward a lower-emission energy portfolio.
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