Robert Rapier | Senior Contributor - Forbes

The majority of U.S. refining capacity is on the Gulf Coast. Refineries there receive a combination of domestic and Canadian crude via pipeline, as well as waterborne imports from all over the world. The crude oil is converted into gasoline, diesel, jet fuel, and miscellaneous other products.

Of the 15 million barrels per day (BPD) of crude oil that U.S. refineries currently process, the Gulf Coast refines about 8.4 million BPD (56%). But that is a mismatch with regional demand for petroleum products.

Last year was a bit of anomaly in that Gulf Coast demand for petroleum products was actually greater than demand on the East Coast. But for most of the past decade, the East Coast was responsible for 5.5 to 5.9 million BPD of demand, and the Gulf Coast was responsible for 5.2 to 5.7 million BPD of demand.

Because refinery output is greater on the Gulf Coast than demand — and because East Coast refining capacity is only 4% of the U.S. total, the Colonial Pipeline serves to connect East Coast demand with Gulf Coast supplies.

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