Piles of mine waste that loom above the historic Colorado mountain town of Leadville are a reminder of the city's boom days

Colorado mining town's polluted legacy has a potential for profit, but some are wary of the risk

A plan to extract gold from mining waste splits a Colorado town with a legacy of pollution

Piles of mine waste that loom above the historic Colorado mountain town of Leadville are a...

For every ton of ore milled, a ton of waste would remain—minus a few ounces of gold.