No, Tintina Black Butte Copper has been carefully designed to protect all water resources and prevent any acid mine drainage. Acid mine drainage, by definition, happens when water flows over or through sulfur-bearing materials that is exposed to air, oxidizes becomes acidic, and carries toxic materials to surface water ways. To prevent this, the underground mine is designed so that all entrances are well above the ground water level and over 300 feet above the underground mine workings in the copper deposit. Water cannot run uphill out of the mine so nothing can ever drain/flow out of the mine.