Commenting open: August 14, 2025 04:10PM MT - September 22, 2025 05:00PM MT.
DP-591, Chino Mine Solution Extraction and Electrowinning Plant (SX/EW Plant) and Reservoirs 6 and 7: Freeport-McMoRan Chino Mines Company, proposes to renew the Discharge Permit for up to 43,200,000 gallons per day of process water to the SX/EW Plant and then to permitted leach stockpiles. Potential contaminants from this type of discharge include total dissolved solids, sulfate, and metals. The facility is located at 99 Santa Rita Mine Road, Vanadium, in Sections 25 and 26, T17S, R12W in Grant County. Groundwater most likely to be affected is at a depth of approximately 3 to 297 feet and has a pre-discharge total dissolved solids concentration of approximately 255 milligrams per liter.
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