Westcoast Pipeline is a natural gas pipeline in British Columbia that brings natural gas to the United States and to TransCanada pipeline. Built in 1957 by Frank McMahon's Westcoast Transmission Co. Ltd., the 650-mile gas pipeline from Taylor in north-eastern British Columbia to the United States was Canada's first "big-inch" pipeline.
Since 2002, it has been owned by Duke Energy of Charlotte, North Carolina.