Mining and surface features, Walsenburg Coal Field map : [Huerfano County, Colorado] / Colorado Geological Survey, Department of Natural Resources.
Relief shown by contours and spot heights. North is oriented to the upper right corner. "The purpose of this map is to portray the relationship between the surface development as shown on aerial photographs taken in the fall of 1985 and abandoned underlying coal mines." "This map compilation was funded by US Government Grant No. G5167081, Division of Mined Land Reclamation, Inactive Mine Program, Colo. Dept. of Natural Resources. Plate - of 21."
Denver, Colo. : The Survey, 1987.