• NFI Inc., of Albuquerque, and RMC, of Denver, the prime contractors.
• Calibre Systems, of the Washington, D.C., area., handling logistics.
• The Arizona Game and Fish Department and Westland Resources, of Tucson, to conduct bat surveys at mine sites.
• Harris Environmental Services, of Tucson, oversees the work to make sure federal specifications are followed and the desert isn't damaged.
