Superfund Site Profile
The Captain Jack Mill site is located at the headwaters of upper Left Hand Creek, about 1.5 miles south of Ward, in Boulder County, Colorado. The site is in a narrow valley known as California Gulch. Mining for gold and silver in the region began in 1860 and ended in 1992. Historic mining operations contaminated soil and surface water with metals and other hazardous chemicals. Cleanup of the site is ongoing.