Lists coal, metal, gemstone, building stone and non-metallic mines, and sand and gravel operations. Includes locations on a state map and a directory by county with mine type and commodity. 58 pages. 1 plate (1:1,000,000). Digital PDF download. IS-45D
This directory provides historic information on active mines in 1996 to 1997 time frame. It was preceded by IS-41 Active Permitted Mine Operations in Colorado, 1995-96, and in turn was later expanded on IS-68 Directory of Active Mines and Mine Permits in Colorado, 2002.
Sources used to compile this data set include: a) The Colorado Division of Minerals and Geology (CDMG) database of permitted mines and quarries, which lists operations as active that are either in production, out of production and in a reclamation process, or in suspension; and b) Individual mine and quarry files in the offices of CDMG, which in some cases do not clearly reflect current status.