Mining superfund site

This is the Eagle Mine zinc mining site in Colorado. It was designated a superfund site due to zinc from the mine entering into the near by Eagle River. Zinc in sufficient concentrations is toxic to the fish in the river. Remediation efforts had some success, and trout populations below the mine are similar to populations in control groups upstream of the mine, but work is still in progress. There is now a full-time treatment facility near the mine designed to remove zinc and other heavy metals from the mine effluent. The mine ceased operations in the early 70's. Since it is on private property, the rather interesting mining buildings have been saved from the vandalism common on public lands (I was in the company of one of the monitoring scientists). Inspite of it's toxic effects, it offers a rather scenic piece of mining history.