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Bunker and Nihill Mine (Bunker & Nihill; Bunker Hill [?]), Sage Hill, Michigan Bluff District (Michigan Bluff deposit), Placer Co., California, USA

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Latitude & Longitude (WGS84): 39° 1' 15'' North , 120° 46' 4'' West
Latitude & Longitude (decimal): 39.0208333333, -120.767777778
A former lode Au occurrence/mine located in the E½NW¼ (estimated) sec. 32, T14N, R11E, MDM, 1.7 km (1.1 miles) SW of Sage Hill (coordinates of record), on the divide between Ladys Canyon on the W and Mad Canyon on the E (3 miles SW of Michigan Bluff), on private land within a National Forest area. MRDS database stated accuracy for this location is 500 meters. This mine is possibly the one referred to by Clark (1970a) as the "Bunker Hill Mine."

Mineralization is a vein deposit hosted in slate. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).

Workings include underground openings.

Mineral List

2 entries listed. 2 valid minerals.

The above list 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.


Lindgren, Waldemar (1900), Description of the Colfax sheet, California: USGS Geological Atlas, Colfax folio (Folio No. 66), 10 pp.

Waring, Clarence A. (1917), Placer County: Report 15 of the State Mineralogist, California State Mining Bureau (Report 15): 15: 335.

Logan, Clarence August (1936), Gold Mines of Placer County: California Journal of Mines and Geology, California Division Mines (Report 32): 32(1): 43.

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193: 90-91.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10034869 & 10213162.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060610588.

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