Telephone: 520-648-2500   Fax: 520-625-0802
Address:    4201 West Pima Mine Road, Sahuarita, AZ 85629

R.R. Connections: Union Pacific Railroad (UPRR)

Location: 18 miles south of Tucson, Arizona in Pima County, Arizona.

Operations: The Mission Complex, an open-pit mine composed of the Mission, Eisenhower, Pima, Mineral Hill and South San Xavier properties and the nearby North San Xavier mine. The current pit, 2.5 miles long by 1.5 mile wide and 1,200 feet deep, is situated on 20,000 acres. Benches are 40 feet high.

December 31, 2014 Employment:
684 employees; 541 hourly / 143 salaried.

Production Statistics (2014):
Copper in Concentrate: 133.9 million lbs.

Economic Impacts (2014):
Wages, salaries and fringe benefits: $62.3 million
Property, severance and sales taxes: $11.3 million
Total materials and other spending (energy, fuel and supplies): $167.7 million
Royalties (State): $9.4 million
Royalties (Tribe): $1.4 million

Fact Sheet


1959 Pre-mine development
1961 Mill began operating at 15,000 tons per day.
1967 Two additional rod mills and one flotation section added tobring capacity to 22,000 tons per day.
1976 Partnership formed with Anamax Mining Company to mine the Eisenhower property between Mission pit and South San Xavier Pit.
1979 Production commenced from Eisenhower.
1980 Flotation cells upgraded
1985 Pima mine, contiguous to Mission, acquired.
1987 Refinements increased mill capacity to 28,000 tons per dayEisenhower acquired by Asarco from Anamax.
1989 Pima Mill acquired
1991 Refurbishing and new construction of (Pima Mill) Mission SouthMill.
1993 Expansion of Mission Mine completed Flotation CellModification.
1995 Secondary crusher modifications and DCS installed in MissionMill. Increases capacity to 43,000 (Total 63,000 with 20,000 from South Mill).
1996 Underground mine expansion.
1997 Underground mine expansion; Overland conveyor installed to movenon-mineral rock.
1999 Mission Mill Secondary Crusher Upgraded.
2000 Mission Mill throughput reduced to 41,000 tons per day.
2001 Mission Mill throughput reduced to 31,000 tons per day, SouthMill placed under care and maintenance.
2002 Mission Mill throughput reduced to 24,000 tons per day.
2003 Mission Mill throughput reduced to 17,000 tons per day. Underground mine closed.
2006 Restart of Molybdenum Circuit.
2009 Pumping system installed to utilize CAP water.
2011 Reclamation of Tailings Dams 1-3 and the Mission North Dump
2011 Mine utilizes biosolids from Pima County Green Valley Wastwater treatment plant.
2013 South Mill Expansion Completed
2033 Reserve life of Mission Mine