2022-12-082022-12-08https://hdl.handle.net/11124/15583Scale approximately 1:480. 1 inch = 40 feet.Linen.29 x 18 cmmine mapsmanuscript mapsengNo Known Copyright: http://rightsstatements.org/vocab/NKC/1.0/.Mines and mineral resources -- Colorado -- Gilpin County -- MapsStillImage