Stone v. High Mountain Mining Company, No. 22-1340 (10th Cir. 2024)
Annotate this CaseIn a case before the United States Court of Appeals for the Tenth Circuit, private citizens and a non-profit organization sued High Mountain Mining Company for alleged violations of the Clean Water Act. The plaintiffs claimed that High Mountain Mining, which operates a gold mine in Colorado, allowed pollutants from its settling ponds to seep into the groundwater, which then migrated into a nearby river. Under the Clean Water Act, a permit is required for any discharge of pollutants from a point source into navigable waters. The district court ruled in favor of the plaintiffs, finding that the settling ponds were a point source and that the operation of these ponds constituted an unpermitted discharge of pollutants into navigable waters, thus violating the Clean Water Act. On appeal, the Tenth Circuit disagreed and reversed the district court's decision. The appellate court held that the district court made a legal error by not adequately considering all the relevant factors to determine whether the connection between the point source and the navigable water was the functional equivalent of a direct discharge. Given the potentially broad implications of the Clean Water Act for mines throughout the Western United States, the appellate court remanded the case back to the district court for further proceedings.
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