Enbridge Inc. plans to invest $2.5 billion in its liquids and natural gas systems, with $2 billion allocated to its Mainline crude oil network through 2028, the company announced Tuesday.

The Mainline, North America's largest crude oil pipeline network, transports light and heavy crude oil, natural gas liquids and refined products from Edmonton, Alberta, to markets in Canada and the U.S. Midwest. Enbridge moves approximately 40% of North American crude oil production.

The announcement comes as U.S. tariffs on Canadian energy imports take effect. Enbridge previously stated in its fourth-quarter earnings that it did not anticipate the tariffs to materially impact its financial guidance.

"All four of our growing franchises are opportunity-rich, and we're seeing approximately $50 billion of combined new growth opportunities through 2030," CEO Gregory Ebel said during an investor day presentation.

The company also plans to invest $400 million in the Birch Grove expansion, a 179 million-cubic-feet-per-day increase to the T-North section of its Westcoast Pipeline. The expansion is expected to be operational in 2028, raising T-North's total capacity to 3.7 billion cubic feet per day.

The 2,953-kilometer (1,834-mile) Westcoast Pipeline runs from Fort Nelson in northeast British Columbia to Gordondale near the British Columbia-Alberta border, south of the Canada-United States border, and currently has a capacity of 3.6 billion cubic feet per day.

In February, Enbridge sanctioned $100 million for the expansion of the T15 project in North Carolina, a 45-mile natural gas pipeline supplying Duke Energy's (DUK.N) Roxboro plant. The company aims to double the pipeline's natural gas delivery capacity.

The total cost of both phases of the T15 project is expected to be $700 million, with operations commencing in 2027 or 2028, according to Enbridge.