07:28 AM EST, 11/14/2025 (MT Newswires) -- Enbridge ( ENB ) said Friday that it reached a final investment decision on the US$1.4 billion Mainline optimization phase 1 project, which would increase its deliveries of Canadian heavy oil to key refining markets in the U.S. Midwest and Gulf Coast.

The project will add 150,000 barrels per day of capacity to Enbridge's ( ENB ) Mainline network and 100,000 bpd of capacity to the Flanagan South Pipeline to meet customer demand for incremental egress, the company said.

The additional capacity from the project is expected to be available in 2027.

"This project demonstrates the competitive advantage of leveraging existing networks to meet growing customer demand, supporting long-term energy security and affordability across North America," said Colin Gruending, Enbridge's ( ENB ) executive vice president and president of liquids pipelines.