 Saturated waste from the Senator Mine south of Prescott is threatening the Hacienda River. Connie Weber has the details. Josephine Maressa with the Arizona Department of Environmental Quality says the river already contains cadmium, copper, and zinc from mining, but they don't want higher concentrations should the saturated pile of waste or tailings collapse into the river. And with the monsoon in full swing... The issue with this is because the tailings pile, we believe, is already unstable.