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    Florence Copper ICSR-SX/EW start-up: design and groundwater notes for engineers

    March 3, 2026|

    Reviewed by Joe Ashwell

    Florence Copper ICSR-SX/EW start-up: design and groundwater notes for engineers

    First reported on International Mining – News

    30 Second Briefing

    Florence Copper in Arizona has produced its first copper cathodes from Taseko Mines’ new commercial in-situ copper recovery (ICSR) operation coupled with a solvent extraction/electrowinning (SX/EW) plant, following electrowinning start-up in late February. The project uses in-situ leaching of a deep porphyry deposit and on-site SX/EW to generate LME-grade cathode without a concentrator, tailings storage facility or smelter. For geotechnical and hydrogeological teams, the move to full commercial ICSR-SX/EW operation sharpens focus on leach-wellfield design, solution containment and long-term groundwater management.

    Technical Brief

    • Early cathode harvest provides initial operational data for solution chemistry control and current efficiency optimisation.
    • Plant performance in these first weeks will calibrate leach rates, wellfield injection–recovery balance and reagent dosing.
    • Hydrogeological containment assumptions now begin to be tested against real production-scale flow and drawdown behaviour.
    • For similar porphyry deposits, Florence’s ramp-up offers a live reference for commercial ICSR schedule and commissioning risk.

    Our Take

    Within our copper coverage, in-situ recovery projects like Florence Copper in Arizona remain rare compared with conventional open pits, suggesting Taseko Mines is positioning this asset as a lower-disturbance, potentially lower-carbon source of United States copper supply.

    Among United States copper items in our database, Arizona continues to dominate project newsflow, which likely reflects both the state’s established permitting framework for copper and the strategic push to secure domestic supply for the energy transition.

    Across the 2048 Projects/Sustainability-tagged pieces, only a small subset combine both tags for copper in the United States, indicating Florence Copper is being framed not just as a growth project for Taseko Mines but as a test case for more publicly acceptable copper extraction methods in populated regions.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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