Officials are worried a water–filled abandoned mountain mine shaft in Leadville, Colo. may erupt, flooding the town below.
More than one billion gallons of water are sitting in a former mine shaft in Leadville about 100 miles west of Denver.
Local officials say the drainage tunnel is building pressure, and they are worried the large amount of snow melting into the tunnel could cause the shaft to burst.
Authorities say an emergency plan is being put into place in case of flooding. They also say the first step toward fixing the water backup could start as early as next week when the Environmental Protection Agency starts a pumping project.
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