Deadly Colorado gold mine malfunction deemed “operator error,” sheriff says
The Mollie Kathleen Gold Mine elevator breakdown was "not attributed to current mine practices or...
mining
How do you extinguish a coal fire that’s burned under Boulder County for a century?
When the project is finished, the excavation team will have moved 182,000 cubic yards of...
New law could finally address thousands of abandoned mines leaking pollution into Colorado water
A new law decades in the making could finally lead to the cleanup of some...
Cyanide won’t be used on Leadville mine waste in proposed gold extraction and cleanup project, company says
CJK Milling will instead use a different process to separate the gold from 1.2 million...
Opinion: Why Colorado’s Chris Wright will be good for the Department of Energy
When President-Elect Donald Trump nominated Denver’s Chris Wright as Secretary of the U.S. Department of...
Why is the EPA spending money on an old Colorado theater, auditorium and grocery?
Colorado this year received $6.9 million for projects in Greeley, Kersey, Lakewood, Monte Vista, Northglenn...
Opinion: The day the Animas River ran orange with pollution may have been the start of something beautiful
It was the summer of 2015 when the Animas River in southern Colorado turned such...
National park’s 25th anniversary is a milestone for Colorado conservation, compromise
On Oct. 21, 1999, the Black Canyon became Colorado's third national park. But it was...
Colorado gold mine ordered to “cease and desist” tours after fatal elevator malfunction
Colorado officials made the order about a week after a tour guide was killed and...
Rare gem discovered in Colorado mine up for auction, bidding starts at $8,000
A rare rhodochrosite gemstone discovered decades ago in Colorado's now-closed Sweet Home Mine could sell...