A recent U.S. Supreme Court ruling could have a significant impact on plans for Canadian mineral exploration company Constantine Metal Resources’ Palmer Project, a zinc, copper, gold and silver project located in the upper Chilkat Valley.
The court case, County of Maui v. Hawaii Wildlife Fund, hinged on the question of whether the Clean Water Act, a 1972 law regulating pollution levels in surface waters, applies to waste discharged into groundwater. A wastewater treatment plant…