1903 - Original Utah Copper Company was created to mine and process low grade copper ore found in a mountain in Bingham Canyon, about 25 miles southwest of Salt Lake City.
1915 - Kennecott Mines became Kennecott Copper Corporation, which purchased a 25 percent interest in the Utah Copper Company and acquired all assets and property in 1936.
1947 - Utah Copper Company was dissolved and became the Utah Copper Division of Kennecott Copper Corporation.
1981 - Standard Oil of Ohio (SOHIO) purchased Kennecott.
1987 - British Petroleum bought SOHIO’s interests. 1989 - RTZ Corporation, now known as Rio Tinto, became the owner of Kennecott Utah Copper Corporation.

Feed Gas: 14% SO₂ (dry gas), O₂:SO₂ ratio = 0.986
Gas Cleaning: DynaWave
Heat Recovery: HRS
Bowers: 2 x 60% Steam Turbine Driven

The old smelter was constructed in the late 1970’s and included a complex material handling system, three (3) Noranda Reactors, four (4) Peirce-Smith converters and a three (3) furnace anode casting plant.   In 1987 environmental constraints limited the operation to one (1) Noranda reactor with three (3) hot Peirce-Smith Converters, but only two vessels could operate (blow) at once.  Concentrate smelting capacity was about 500,000 tonnes per year.  Process gas from the one (1) operating reactor and one (1) converter, about 290,000 Nm3/h, was treated in two (2) single contact sulphuric acid plants.