(AP Photo/Brennan Linsley) Water flows through a series of sediment retention ponds built to reduce heavy metal and chemical contaminants from the Gold King Mine wastewater accident, in the spillway about 1/4 mile downstream from the mine, outside Silverton, Colo., Friday, Aug. 14, 2015. Officials have said that federal contractors accidentally released more than 3 million gallons of wastewater laden with heavy metals last week at the Gold King Mine near Silverton. The pollution flowed downstream to New Mexico and Utah.