SUBSIDIARIES & JOINT VENTURES

EJECUTORA PROYECTO HOSPITAL DEL COBRE-CALAMA S.A.
December 31st, 2006

Legal status
Company name: Ejecutora Proyecto Hospital del Cobre-Calama S.A. Private limited company.

Capital subscribed and paid in
The share holders are Codelco Chile with 99.9% and Isapre San Lorenzo with 0.01%.
Capital Subscribed and paid in by Codelco is US$379,499.

Purpose
• To plan and build, by itself or through third parties, a building to be used as a hospital in the city of Calama.
• To carry out all activities necessary to meet this purpose, including agreements and contracts as necessary.
• To rent or sub-rent hospital premises; hire insurance and carry out maintenance, repairs and improvements to said premises.

Board of Directors
Sergio Jarpa Gibert, President (*)
Alejandro Salinero Benardi, Director (*)
Francisco Coddou Pereda, Director (*)
María Rosa Martínez Núñez, Director (*)

General Manager
Héctor Cerda Ortíz, (*)

Codelco's share of capital and changes during the fiscal year
Codelco-Chile: 99.99% $184,341,191.04 pesos.
Isapre San Lorenzo: 0.01% $18,435.96 pesos.

Commercial relations with Codelco
Agreement framework signed between:
• Codelco-Chile
• Ejecutora Proyecto Hospital del Cobre-Calama S.A., and
• Las Américas Administradora Fondos de Inversión S.A.

This provides the regulatory framework governing the relationship between these parties, for a 20-year period (until 31 March 2021).

Contracts with Codelco
• Sub-rental of the Hospital del Cobre, Dr. Salvador Allende G., until March 2021, as per framework agreement.
• Accounting and billing services provided to the executing company by Codelco, until 31 March 2021.
• Conceptual engineering for the expansion of the primary care centre, provided by Codelco, until December 2004.
• Signed contract for CAP expansions projects.
• Mutual contract between Corporación Nacional del Cobre de Chile, Codelco Chile and Sociedad Ejecutora Proyecto Hospital del Cobre Calama S.A., until 17 March 2005.
• Contract between Sociedad Ejecutora Proyecto Hospital del Cobre Calama S.A. and J.E.J Ingeniería y Servicios Ltda., signed 1 February 2005.
• General construction Contract between Sociedad Ejecutora Proyecto Hospital del Cobre Calama S.A. and Empresa Constructora y Montajes Industriales OCEGTEL S.A. Signed 6 February 2006.

Investments as a percentage of total head office
2006 Investment in subsidiary US$17,000.
2005 Investment in subsidiary US$0.
Total investment as a percentage of head office assets: 0%, 2006.