Old mines still shape the water in Clear Creek

Clear Creek County was built on gold and silver mining, and that history did not just leave behind old buildings. It left behind miles of tunnels and rock that still affect the water.

When water moves through old mine workings, it can pick up metals and turn acidic. Near Idaho Springs, one large drainage tunnel from the mining days keeps releasing water year after year. To handle this, federal and state agencies run an ongoing cleanup. Part of that work is a treatment facility that cleans mine drainage before it reaches Clear Creek.

The wider mining area around Idaho Springs and Central City is part of a federal Superfund cleanup site. That is a formal designation for places where past pollution needs long-term attention.

For someone living here or buying property, this is mostly background, not alarm. If your water comes from a town or district system, it is monitored under public drinking-water rules. If you rely on a private well, regular testing is generally up to you as the owner, and the county’s mining history is a good reason to keep up with it. Either way, mine drainage and creek water quality here are actively managed, not ignored.

To understand the cleanup and what it covers, start with the EPA’s Superfund program pages and Clear Creek County’s own page on the Superfund site.