November 05, 2018

Superfund and the Problem of Natural Background in the Upper Animas River Basin: A Case Study

Robert A. Arnott, Ph.D., and Paul Nazaryk

Gold King and the Animas River

The Bonita Peak Mining District is located within the Upper Animas watershed in the San Juan Mountains near Silverton, Colorado, and includes 48 individual historic mining sites. Contamination from historic mining operations in the area had been studied since the 1990s by various groups including the Animas River Stakeholders Group, the Colorado Department of Public Health and Environment, and the US Environmental Protection Agency (EPA). 

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