USGS Water-Quality Data and Activities for the 2015 Gold King Mine Release
Confluence of Animas River (left) and Cement Creek (right). View is looking downstream. Photo taken September 30, 2012. Credit: USGS. This photo is in the public domain. Higher resolution version is available.
The region near Silverton, Colorado, has been an area of extensive USGS research on abandoned mine lands and on natural sources of metals and acidity to streams. For a selected bibliography of past reports, see the USGS Abandoned Mine Lands Initiative Upper Animas River area reports.
For additional USGS reports relating to the water quality and sediment for the entire area of interest, from the headwaters of the Animas River downstream to the San Juan Arm of Lake Powell, users can search the USGS Publications Warehouse.