The North Dakota Pipeline Company (NDPL) system is a 950-mile (1530 km) crude oil pipeline system that collects oil from fields in the Williston Basin in Montana and North Dakota and transports it eastward to the Mandan Refinery in Mandan, North Dakota and to other pipeline systems that carry oil to other refineries in the Midwest. About 330 miles (530 km) of pipeline are used for collection from oil wells, and this connects to a 620-mile (1,000 km) main transportation line.
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In addition to collecting oil from wells in the United States, it also connects to a Canadian pipeline system owned by Enbridge at North Dakota's border with Saskatchewan. The American pipeline is owned by Enbridge Energy Partners, LP, an organization partly owned by the Canadian company.
The pipeline's eastern terminus is in Clearbrook, Minnesota where there is a junction with Enbridge's Lakehead System and the Minnesota Pipeline (ultimately owned by Koch Industries).