The owners of a North Dakota refinery that was the first to be built in the US since the 1970s have curtailed output and may try to sell it, the latest victim of the oil price slump roiling the energy industry.
MDU Resources Group Inc and Calumet Specialty Product Partners LP, which jointly own the refinery, said on Wednesday the refinery is running at 75% capacity due to high operating costs and slipping demand for diesel, its main product.
