One of the world's largest pipelines is this 800-mile long, 48-inch diameter duct system carrying crude oil and having 11 pumping stations. The Trans-Alaska Pipeline is owned by Alyeska Pipeline Service Company and was built between 1974-77. It runs north to south from Prudhoe Bay through Deadhorse and Fairbanks to Valdez. The pipeline caused a major economic boost in Alaska and has been featured in several movies.
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