CLINICA RIO BLANCO S.A.
December 31st, 2006

Legal status
Private limited company
Company name: Clínica Río Blanco S.A.
RUT: 99.573.600-4

Capital subscribed and paid in
Capital subscribed and paid by Codelco US$4,456,000.

Purpose
Provision of health services and benefits, either directly or through financing them, for which it can found, maintain and administer clinics or other health care establishments,
provide ambulatory health care, emergency and paramedics; carry out laboratory, pharmacology, analysis, radiology tests, and, in general, any action appropriate to medicine and nursing.

Board of Directors
Daniel Trivelli Oyarzún, President (*)
Francisco Peragallo Carrasco, Director
Rosa María Urzúa Pilotti, Director
Carlos Chico Ramos, Director (*)
Marco Antonio Hernández (*)
Manuel Opazo Mortola, Alternate (*)
Héctor Cáceres V., Alternate (*)
Luis Galdames Cisterna, Alternate (*)
Rubén Urra S., Alternate (*)
Fernando Condell Meza, Alternate (*)
Leonardo Whittle F., Alternate (*)

General Manager
Juan Carlos Cabezas Beroiza

Codelco's share of capital and changes during the fiscal year
Codelco Chile Andina Division: 99%.
Isapre Río Blanco Ltda.: 1%.

Commercial relations with Codelco
Contracts with Codelco Chile Andina Division:
Occupational Health contracts with the Occupational Health and Industrial Hygiene Department.
Contract Nº 4500525276 for providing health care as per Law Nº 16,744.
Contract Nº 4500604608, rescue brigade maintenance service, DAND mining management.

Investment as a percentage of total head office
2006 Investment subsidiary US$2,664,000.
2005 Investment subsidiary US$3,434,000.
Total investment as a percentage of head office assets: 0.02%, 2006.