1956 |
Incorporation of the Recuperada Mine in the district of Huachocolpa,
Huancavelica. |
1960 |
Inauguration of the Corralpampa concentration plant, in Huachocolpa,
Huancavelica.
Start-up of operations in Orcopampa, Arequipa . |
1967 |
Inauguration of the Orcopampa concentration plant. |
1960 |
Commencement of explorations in Uchucchacua, in the province
of Oyón, Lima .
|
1969-73 |
Installation of the pilot plant in Uchucchacua |
1972 |
Incorporation of Compañía Minera Colquirrumi S.A., in Haulgayoc,
Cajamarca and Compañía Minera Condesa in Huachocolpa, Huancavelica |
1975 |
Installation of the industrial plant in Uchucchacua. |
1977 |
Formation of Buenaventura Ingenieros S.A. (BISA). |
1978-79 |
Extension of operations at Uchucchacua and aggressive explorations
campaign at Julcani, including commencement of construction of the 4.5
km long Gandolini Tunnel. |
1979 |
Formation of Minera Shila
S.A. and Cia. Minera Iscaycruz S.A. subsidiaries |
1979 |
Incorporation of Sociedad Minera El Brocal S.A., Colquijirca,
Cerro de Pasco subsidiary |
1980 |
Extension of operations at Julcani. |
1980 |
Construction of the Patón Hydroelectric Power Plant (1,500 Kw) in
Uchucchacua. |
1981 |
Installation of the sodium sulfide plant at Uchucchacua. |
1982 |
Beginning of explorations in Yanacocha area. |
1983 |
Completion of the Gandolini Tunnel in Julcani. |
1983 |
Incorporation of Consorcio Energético de Huancavelica S.A. |
1985 |
Construction of the high tension line running from Huancavelica down to
the Castrovirreyna mines, passing through Julcani and Huachocolpa,
distributing power from the Mantaro Hydroelectric Power Plant. |
|
1985 |
Incorporation of Inversiones Mineras
del Sur |
1988 |
Construction of the Huancarama Hydroelectric Power Plant (2.6 Mw),
Orcopampa. |
1992 |
Formation of Minera Yanacocha S.A, a Buenaventura , Newmont and
BRGM joint venture. |
1993 |
First doré bar produced at Yanacocha. |
1995 |
Sale of Buenaventura ’s participation in Empresa Minera Iscaycruz S.A. to
Glencore. |
1996 |
Purchase option of 9.17% of Minera Cerro Verde to Cyprus-Amax. |
1996 |
Registration of Buenaventura in the New York Stock Exchange and placement of ADR’s. |
1996 |
Buenaventura increases its participation in Yanacocha (under
precautionary measure.) |
1996 |
Acquisition of 100% of Cedimin (under precautionary measure.) |
1997 |
Construction of 48 kms of 138Kv Transmission Line, running from Cerro de
Pasco to Uchucchacua . |
1997 |
New SAG mill in Uchuchacua permits doubling production capacity |
1998 |
Commencement of explorations in the Nazareno vein, Chipmo mine, Orcopampa. |
2000 |
INMINSUR begins construction of the Antapite project |
2000 |
Final and definitive agreement between Buenaventura , Newmont and
BRGM ratifying increased participation in Minera Yanacocha and Cedimin |
2001 |
CONENHUA constructs a 220Kv transmission line running 147 kms
between Trujillo and Cajamarca, to supply Yanacocha and also to electrify
Cajamarca and its surrounding areas. |
2001 |
INMINSUR starts up operations at the Antapite mine, in Ica . |
2002 |
Beginning of construction works for the Patón Tunnel in Uchucchacua |
2003 |
Construction works for cyanidation plant in Orcopampa begin. |
2003 |
Completion of construction works for the Patón Tunnel in Uchucchacua |
2004 |
Operations at Orcopampa’s cyanidation plant begin |
2004 |
Mine-deepening project starts at the Chipmo mine, Orcopampa. |
2004 |
CONENHUA commences construction works for the 104 km long, 138Kv Transmission Line from Callalli to Ares. |
