The Spider Leg Mine is a tungsten mine located in Boulder county, Colorado at an elevation of 8,248 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Elevation: 8,248 Feet (2,514 Meters)
Primary Mineral: Tungsten
Lat, Long: 39.97444, -105.50833
Gallery: View 1 Spider Leg Mine Photos
Active Mining Claims
Claim data is for Mines level premium members.
Location: 1,475 ft N. 370 E. of new shaft of Conger mine.
Workings: See figure 84 in gallery.
Geology: Workings on overlapping veins in two vein zones, one trending about north and one northeast. Most of veins dip east, but chief vein in southern part of northward-trending workings dips west. Mine in schist that contains many elongated bodies of pegmatite; veins productive where they cross some of these.
History and production: Veins worked near surface before 1914, when Hershey reported that ore 24 to 30 in. wide and 75 ft long had been mined but had pinched out only a few feet below surface. Most of workings shown in figure 84 driven in 1941-42 by Vanadium Corp. of America, the owner; about 3,800 units of WO3 in ore averaging about 1.2 percent WO3 produced at this time. Total output probably at least 5,000 units.
Source: Geology and Ore Deposits of the Boulder County Tungsten District Colorado. USGS Professional Paper 245, 1953
Spider Leg Mine MRDS details
Site NamePrimary: Spider Leg Mine
District: Boulder Tungsten
Land StatusLand ownership: Private
Time Period: 1941-1942
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Years of Production:
PhysiographyGeneral Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Reference Category: Deposit
Reference: COLO BOM 1940 LIST