With an estimated 300,000 abandoned mine lands (AML) features, of which 50,000 pose significant risks to human safety, Nevada leads the west in number of AML challenges to remediate.  The Nevada BLM AML program has three components: historic physical safety hazards, historic watershed/chemical contamination sites such as old millsites or tailings impoundments, and contemporary, modern mines and millsites which have been abandoned or become bankrupt. Fortunately, Nevada also has a nationally recognized collaboration, including state agencies, other federal entities, conservation groups, academic scientists, the Nevada Mining Association, individual mines and equipment dealers, tribal entities, and others who are making great and continuous progress in eliminating Nevada's legacy of abandoned mine problems.