Florence Copper Project, Florence, AZ

Arizona received UIC Primacy on October 15, 2025. EPA transferred all AZ UIC inventory (except for inventory on Indian lands) and permits to ADEQ.

ADEQ re-issued the Florence Copper Project Class III UIC permit for in-situ production of copper in January 2026, known as the State of Arizona UIC Permit No. P-515167, LTF 112590, Place ID 1579. The new State Permit continues to require all Florence Copper Project activities to be carried out in accordance with the Programmatic Agreement and the Historic Property Treatment Plan, pursuant to Section 106 of National Historic Preservation Act and Part II.M of the Permit. EPA continues its role as lead agency ensuring implementation of these requirements.

• Florence Copper Project: Programmatic Agreement and the Historic Property Treatment Plan (pdf) (1.19 MB, May 2023)
  Programmatic Agreement Among EPA Region IX, Advisory Council on Historic Preservation, and the Arizona State Historic Preservation Officer Regarding the Florence Copper Project Commercial In-Situ Copper Recovery Facility, Florence, Pinal County, Arizona.
• NHPA Section 106 Consultation Response to Comments: Florence Copper Project, Florence, AZ (pdf) (238.22 KB, September 14, 2023)
  NHPA Section 106 Consultation for the Florence Copper Project - Response to comments submitted during the public comment period on the EPA’s Draft Class III Underground Injection Control (UIC) Area Permit (Draft Permit) and the Section 106 process of National Historic Preservation Act (NHPA) for the Proposed Florence Copper Project.