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