It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Russell L. & Lyn Wood Mining History Archive, Collections: A0160 Colorado Mining Association Photographs
Collection focus: Photographs of mining activities in Colorado (1920?-1980?). The Colorado Mining Association, established in 1876, is the oldest professional mining industry trade association in the U.S. These photos reflect decades of mining and mineral processing throughout the state, making it a unique record of the history of mining in Colorado.