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Big Four Mine, Heeney, Green Mountain District, Summit Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 52' 43'' North , 106° 19' 35'' West
Latitude & Longitude (decimal): 39.8786342334, -106.326429449
Other/historical region names associated with this locality:Near Kremmling

A former Pb-Zn occurrence/mine located in sec. 14, T2S, R80W, 6th. Principal Meridian, 2.3 km (1.4 miles) WNW of Heeney (coordinates of record), along the lower S slope of Green Mountain (N shore of the Green Mountain Reservoir), just upstream of the dam along highway 30 (Heeney Road). This locality is now apparently inundated beneath the reservoir.

Mineralization is hosted in monzonite and sandstone.

High-grade sphalerite. 45% Zn with 10 to 20 ounces of Ag/ton.

Mineral List

7 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


U.S. Bureau of Mines (1946), Report of Investigation ROI 3883.

Rocks & Minerals (1949): 24: 231.

Eckel, Edwin B. (1997), Minerals of Colorado, updated & revised.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10018528.

Mineral commodity files, doc. 3535-3562.

Conservation Division Comp. date 8/65.

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