Featured Project

Mission Copper Mine Complex

The ASARCO Mission Mine Complex is located in East Central Pima County, approximately 18 miles southwest of Tucson, Arizona. The mine complex extends over an area of approximately 19,000 acres and includes the Mission integrated open pit, crushing, grinding and flotation facilities, tailings facilities, waste rock dumps and warehouse, maintenance and administrative areas. 

Knight Piésold’s Role

Knight Piésold and Co. was retained by ASARCO-Mission to produce an assessment and alternatives evaluation for selection of a new tailings disposal area. Six tailings disposal options were developed and analyzed. A preferred option was selected by the client for further analysis in a pre-feasibility study.

Services provided by Knight Piésold include:

  • Permit requirements review and analysis
  • Development of a decision matrix and fatal flaw analysis
  • Site-specific characteristics evaluation
  • Development of surface water management considerations
  • Analysis of social and environmental constraints
  • Conceptual design development and cost estimates for each option
  • Recommendations for selection of the preferred option