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  • Freeport-McMoRan Permitting

    Freeport-McMoRan Sierrita Inc.'s Air Quality Permit Renewal Application 

    The Pima County Department of Environmental Quality has received the the Air Quality Permit renewal application from the Freeport-McMoRan Sierrita Inc.'s copper mine.

    Documents related to the Freeport-McMoRan Sierrita Inc.'s (FMSI) Air Quality Permit will be placed on this page as they become available.

    If you have questions regarding this permit, please contact Rupesh Patel of PDEQ at (520) 724-7341 or e-mail Rupesh Patel.


    PDEQ Request for Additional Information (April 30,2021)



    FMSI Permit Renewal Application Correction Letter (November 4, 2020)

    FMSI Application Complete Letter (September 21, 2020)

    FMSI Air Quality Permit Renewal Application (July 29, 2020)


    Issued Air Quality Permit (January 30, 2016)
    Final Technical Support Document (January 30, 2016)
    Final Potential to Emit (PTE) Document (January 30, 2016)
    FMSI Tailing Dam Dust Control Management Plan (March 25, 2019 Revision)
    FMSI Fugitive Source Management Plan (January 31, 2013)
    FMSI Lime Unloading & Handling Wet Scrubber O&M Manual (December 2009)


    Proposed Air Quality Permit (December, 2015)
    Proposed Technical Support Document (December, 2015)
    Potential to Emit (PTE) Document (December 2015)
    Public Notice Document (December, 2015)


    Application Complete Letter (1-16-2014)


    Freeport-McMoRan Sierrita Inc.'s submitted Air Quality Permit renewal application (12-23-2013)