2007 Sustainable Development Report
Resolution Project Profile | Chapter Contents
Resolution Project Profile
Resolution Copper is a part of the
Rio Tinto Group and is a partnership
between two of the world’s leading
international mining companies,
Rio Tinto (RT) and BHP Billiton (BHP).
The project is owned 55 percent by
Rio Tinto and 45 percent by BHP Billiton.
Resolution Copper Mining is a project within Rio Tinto
Copper and is managed by a team of two vice presidents
working under the president. The management team drives
sustainable development principles down through all
operational departments within RCM. The Resolution Project
Initial exploration completed by Resolution Copper Mining
from 2001–2003 indicated a large copper ore body more than
7,000 feet below ground surface in the vicinity of the former
Magma Copper Shaft No. 9. The project is located in the
historic Pioneer Mining District in Pinal County, three miles
east of Superior, Arizona. Patented and unpatented mining
claims covering the project area are held in partnership by
Rio Tinto and BHP Billiton. Exploration and pre-feasibility
activities are expected to result in development and operation
of a new underground mine—a mine that is expected to
produce more than 20 percent of US copper demand for
several decades. The Resolution Project 
The Resolution Project is quite possibly the largest single
development project in Arizona, and will have a significant
impact not only on the company’s host communities but
also the state, through taxes and employment. Project
expenditures since inception are $232 million, with figures
expected to rise significantly over mine life.
The Resolution Project consists of two sites: one north of
Superior called the West Plant site, which was the location of
mining and smelting activities of the historic Magma Mine
from 1910 until 1996; and another at Oak Flat (known as
the East Plant site) that was the main location for mining
beginning in the 1970s. The West Plant site is the focus of
major cleanup efforts by Resolution Copper. Expenditures on
site rehabilitation to date total $13.3 million, and will near
$50 million by the time the work is completed. The No. 9
shaft at the East Plant site is the focus of future development.
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