IS-45 Active Permitted Mine Operations in Colorado, 1996-97

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.

Author: A.D. Lawson
Status: In Print
Year: 1998