Tesoro Refineries
Mandan Refinery

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The Tesoro Mandan refinery began operations in 1954, three years after crude oil was discovered in North Dakota, with an initial capacity of 30,000 barrels per day. Today, the refinery has a capacity of 58,000 barrels per day and processes primarily sweet (low sulfur) domestic crude oil, from North Dakota. The facility manufactures gasoline, diesel fuel, jet fuel, heavy fuel oils and liquefied petroleum gas. Refinery products are trucked and railed from Mandan, and also shipped east via pipeline to supply the Jamestown area, eastern North Dakota and Minnesota. 

Tesoro operates more than 900 miles of crude and product pipelines, transporting more than 380,000 barrels per day across our system. The largest part of this system is a 750-mile crude oil gathering and mainline system that delivers all of the Mandan refinery’s crude supply. Tesoro distributes approximately 85 percent of the Mandan refinery’s production through a third-party refined products pipeline system that serves various areas from Bismarck, N.D. to Minneapolis, Minn. 

Tesoro Mandan occupies 960 acres and is on the Missouri River in central North Dakota, approximately five miles west of Bismarck, in Mandan.