Freeland Mine & Extension Mine (Extension Line Shaft; Minnie Tunnel; Diamond Tunnel; Platt Tunnel; Freeland Shaft), Lamartine District, Clear Creek Co., Colorado, USA
Latitude: 39°44'26"N
Longitude: 105°35'29"W
The Freeland vein, about 4 miles west of Idaho Springs, was discovered in 1861. It is a strong trunk vein having a northeast strike and rather gentle dip, which averages 36° NW. It is about 2,200 feet long and is opened by several tunnels, the lowest of which has its portal near the bottom of Trail Creek. There are six levels beneath this lowest or Freeland tunnel. The McClelland tunnel has its portal on the Clear Creek side of the divide, below Dumont, and cuts the veins about 400 feet below the bottom of the Freeland shaft. This tunnel is more than 5,100 feet long. A map of the Freeland mine shows about 4 1niles of underground workings. The Gum Tree vein, a branch of the Freeland vein, is opened by an inclined shaft and has several thousand feet of workings. The Toledo is also opened by an inclined shaft.
References
Dana 6:1089.
U.S. Geological Survey Professional Paper 223
Mineral List
17 entries listed. 17 valid minerals.
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