ABOUT
US

HISTORY

1800-1950
1960
1970
1980
1990
2000

1800-1950

1899

ASARCO organized as American Smelting and
Refining Company. Included in original
consolidation were mines and mining claims
in Colorado and Mexico. Major plants in
consolidation included: Globe by-products
plant (Denver, Colorado), East Helena lead
smelter (Montana), El Paso lead plant (Texas).

1901

Merged with M. Guggenheim’s Sons.
Included in the merger were the Perth
Amboy copper refinery (New Jersey) and
smelters in Mexico (Chihuahua lead smelter,
San Luis Potosi lead and copper smelter,
Monterrey lead and copper smelter). Acquired
five additional mines in Mexico.

1910

Purchased mining properties in Silver Bell
district of Arizona. Copper smelters built in
El Paso, Texas, and Hayden, Arizona.

1922

Amarillo, Texas, zinc plant constructed

1942

Corpus Christi, Texas, zinc plant constructed.

1954

Production commenced at Silver Bell,
ASARCO’s first open-pit copper mine.

ASARCO was organized in 1899 as American Smelting And Refining Company.
Originally a consolidation of a number of lead-silver smelting companies, the Company has evolved over the years into an integrated producer of copper, and other metals.
The Company is a fully integrated miner, smelter and refiner of copper in the United States.
Significant copper mines include the Mission, Silver Bell and the Ray open-pit mines, all three in Arizona. ASARCO has solvent extraction/electrowinning product at our Ray and Silver Bell mines.

1960

1960

Southern Peru Copper Corporation opened
the Toquepala mine and Ilo smelter.

1961

Mission copper mine in Arizona started up.

1967

Mexican mines and plants reorganized as
ASARCO Mexicana, S.A., and 51% interest
sold to Mexican investors.

1970

1971

Four Tennessee zinc mines purchased.

1973

San Xavier copper mine and leach plant
in Arizona started production

1974

ASARCO Mexicana, S.A. reorganized as
Industrial Minera Mexico, S.A. and 15%
interest sold to Mexican investors reducing
equity to 34%.

1975

Corporate name changed to ASARCO
Incorporated.
Amarillo zinc refinery closed.
Amarillo copper refinery commenced
production.

1976

Southern Peru Copper Corporation opened
Cuajone copper mine.

1978

Industrial Minera Mexico, S.A. (IMM) reorganized.
ASARCO owns 34% of Mexico Desarrollo Industrial
Minero, S.A., a holding company formed to
hold shares of IMM and shares of certain IMM
operating subsidiaries.

1979

Modernization of El Paso Plant completed.
Eisenhower Mining Company, a partnership
of Anamax and ASARCO, began mining the
Palo Verde copper deposit located between
ASARCO’s Mission and San Xavier copper mines

1980

1983

Hayden copper smelter modernization
completed.

1985

Corpus Christi zinc smelter and refinery
operations suspended indefinitely.
Pima copper mine in Arizona acquired.

1986

Ray copper mine and smelter purchased.

1987

Anamax interest in Eisenhower mineral
reserves acquired.

1988

Encycle, Inc. started up waste treatment
facility at Corpus Christi.

1989

IMASA Group acquired.
49.9% interest acquired in copper mining
business of Montana Resources, Inc.
ASARCO announces decision to end involvement
in coal mining.
ASARCO announces board approval to expand
copper facilities at Mission and Ray mines
and El Paso smelter.

1990

1991

Expansion of Mission mine completed.

1992

Expansion of Ray mine completed.
ASARCO becomes a fully integrated
copper producer

1993

Modernization of El Paso smelter completed

1994

Acquisition by Southern Peru Copper
Corporation of Ilo Refinery.
Underground operation at Mission mine
announced.
ASARCO and Coeur d’Alene Corp. form Silver
Valley Resources, Inc

1995

ASARCO purchases an additional 10.7% interest
in SPCC, increasing holdings to 63%;
consolidates results.
SPCC starts SX/EW facility at Toquepala.
New sulfuric acid plant started at
SPCCs Ilo smelter

1996

ASARCO announces construction of a new
mining and SX/EW facility at Silver Bell mine.

1997

Silver Bell solvent extraction/electrowinning
facility started.
ASARCO sells shares in Grupo Mexico, S.A. de C.V.
for $323 million.
Expansion program started at SPCC’s Cuajone
mine; to increase mine’s production 50%.

1999

ASARCO celebrates a century of operations as
American Smelting & Refining Company.
ASARCO suspends operations at El Paso, Texas
copper smelter.
ASARCO closes its Black Cloud Mine in Colorado

2000

2000

Grupo Mexico Sells American Limestone
Company to CSR America for $211M.
Grupo Mexico Forms Americas Mining
Corporation (AMC) to include ASARCO, SPCC
and Minero Mexico, to be headquartered in
Phoenix, Arizona.

2001

ASARCO suspends operations at East Helena,
an original M. Guggenheim facility.
ASARCO suspends operations at the
Tennessee Mines Division.
ASARCO reduces mine production at Mission
by 61 percent.

2002

ASARCO reduces mine production at Mission
to 15% of total capacity.

2003

ASARCO sells its interest in SPCC to AMC

2005

ASARCO files Chapter 11 Proceedings for
five non-operating, dormant subsidiaries.
Asarco files Chapter 11 Proceedings on
August 10th..

2006

ASARCO closes the Globe (Denver) High-Purity
Metals plant; the last of the original
M. Guggenheim facilities.

2008

Sterlite Industries Agrees to Purchase
ASARCO for $2.6 Billion; later withdraws bid

2009

ASARCO Emerges from Bankruptcy and
Re-integrates into Grupo Mexico