Ref.: Rocks & Min.: 16:413; 22:205; "Minerals of Colorado, updated & revised", by Eckel, Edwin B., 1997. A copper-nickel mine in the Idaho Springs Formation (lenticular layers of amphibolite in a biotite schist). Owned by Mr. Yeager. Workings featured 2 adits (upper & lower tunnels) with a connecting winze, an open cut & a shaft. Located near Gold Hill. Produced 25,000 tons of Ni ore at 2 - 3% Ni.
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Map Reference: 38°23'33"N , 108°25'54"W
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Mineral List:20 entries listed. 17 valid minerals.
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