The Seaway Pipeline was originally built by a consortium of oil industry firms formed in 1974 named Seaway Pipeline, Inc. for transferring (then) cheap foreign oil from Texas ports to refineries in the Midwest. After two years of construction, the system became operational on 23 November 1976, and pumped crude oil north until 1982. In 1984, the other consortium members were bought out by Phillips. Seeking to capitalize on the pipeline's location to gather raw natural gas in Oklahoma and Texas for transport to the company's refinery complex at Sweeny, Texas, and other refineries near Houston, Phillips converted the system to ship natural gas south instead of shipping crude oil north. Phillips called that arrangement the "Seagas Pipeline". In 2005, Texas Eastern Products Pipeline, was acquired by
Enterprise Products Partners L.P. in 2005, and Enterprise Products became the system operator with a 50% stake. In late 2011, Canadian pipeline company
Enbridge bought Conoco's remaining 50% interest in the company for $1.15 billion. The Seaway Crude Pipeline Company LLC (a joint venture between Enterprise Products and Enbridge) became the pipeline's operator. In late May 2012, the Seaway's flow was reversed, and crude began arriving at Freeport on 6 June 2012. On January 11, 2013, the Seaway's capacity was increased to . On January 30, 2017, a Texas Department of Transportation crew accidentally dug into the Seaway Pipeline near
Blue Ridge, Texas, causing a large spill. On January 30, 2017, a road crew punctured the Seaway pipeline near
Dallas. Two days later, it was unclear how much oil had spilled over the nearby Highway 121. After the incident, supply concerns reportedly helped push oil prices 2% higher. ==Details==