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Permitting process moving ahead for controversial copper mine expansion in San Juan County

The proposal, which would involve pumping diluted sulfuric acid into a southeast Utah aquifer, has raised fears of groundwater contamination.

(Zak Podmore | The Salt Lake Tribune) Heap leach pads and ponds at the Lisbon Valley Copper Mine in San Juan County on Nov. 12, 2020. The Lisbon Valley Mining Company wants to expand mining operations using a method called in-situ recovery.