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EPA drills into American Tunnel to unravel mine pollution mystery

Driven by desire to know what lies beneath, crews bore deeper every day

EPA says it will carry out work Sunnyside Gold refuses to do

Former mining company refused work order last week

Sunnyside Gold says ‘no’ to EPA’s work order at Superfund

Mining company: ‘SGC will no longer be a pawn in this never-ending science project’

EPA finds low risk to human health at Superfund site near Silverton

Despite findings, agency says cleanup remains a priority

Is EPA protecting mining history around Superfund site?

Agency says it is complying with historic preservation standards

Partisan bills compete to reform hard-rock mining laws

Democrats and Republicans propose different solutions

Middle school students explore Animas River pollution

Teaching children about watershed helps protect and manage it in the future

EPA wants to restore aquatic life in four stretches of waterways

Agency to focus on four areas in Animas River basin

Larry Perino, one of the last Sunnyside Gold employees, announces retirement

Reclamation manager looks back at Silverton’s mining past

Winter weather forces closure of Gold King Mine treatment plant

Facility built to resist cold, but snowfall and avalanches become problematic

What are the ultimate goals for Superfund cleanup around Silverton?

EPA hopes to improve water quality in Animas River below Silverton

EPA’s lead in Superfund around Silverton announces retirement

Rebecca Thomas wraps up more than three decades cleaning up sites around country