Exxon Billings Refinery, Montana

A relatively small refinery, with a capacity of around 62,000 barrels per day, but averages around 20,000. It was built by the Carter Oil Company in 1947, on the bank of the Yellowstone River. It purchases crude primarily from Wyoming and Alberta, and supplies the region with gasoline, diesel, asphalt, butane, and propane. It is capable of producing 450 million gallons of gasoline per year. It is the smallest of Exxon’s seven refineries in the USA, which include one of the largest in the world, the Baytown Refinery in Texas, which can process more than 400,000 barrels per day.