Copper Cliff Mine

The Copper Cliff Mine is a copper mine located in Adams county, Idaho at an elevation of 5,200 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.

Mine Info

Name: Copper Cliff Mine  

State:  Idaho

County:  Adams

Elevation: 5,200 Feet (1,585 Meters)

Primary Mineral: Copper

Lat, Long: 45.1036, -116.67580

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the Copper Cliff Mine

Copper Cliff Mine MRDS details

Site Name

Primary: Copper Cliff Mine
Secondary: Silver King


Primary: Copper
Secondary: Silver
Tertiary: Gold


State: Idaho
County: Adams
District: Seven Devils District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Payette National Forest


Type: Located Claim


Type: Surface


Owner Name: Alta Gold Co.
Percent: 100.0
Home Office: Council, Idaho, 83612
Years: 1989 -

Owner Name: Silver King Mines, Inc.


Year: 1976
Time Period: 1972-1976
Year: 1972
Material type: CON CU AG
Description: Ap_Grade: ^40 % Cu, 20 Oz Ag/Ton


Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Milling Method: Flotation
Year First Production: 1972
Discovery Method: Ore-Mineral In Place
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Payette Section
Physiographic Detail: Seven Devils Mountains

Mineral Deposit Model

Not available




Type: L
Description: Ne-Trending Folding


Alteration Type: L
Alteration Text: Epidote, Chlorite, Sericite, Calcite


Name: Keratophyre
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Triassic

Name: Keratophyre
Role: Associated
Age Type: Associated Rock
Age Young: Late Triassic

Name: Keratophyre
Role: Associated
Age Type: Host Rock
Age Young: Late Triassic

Analytical Data

Not available


Ore: Bornite
Ore: Malachite
Ore: Chrysocolla
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Copper
Gangue: Ilmenite
Gangue: Hematite
Gangue: Pyrite


Comment (Reserve-Resource): Only 200,000 Short Tones Of Low Grade Ore Remain. Silver King Mines, Inc., Communication With Wfoc, May 3, 1984.

Comment (Reserve-Resource): Grade Calculated On Estimated Mill Recovery Of 80 Percent For Copper And Silver.

Comment (Location): Original coordinates for line#1 were: lat/long NAD27 45-6-20N 116-40-42W (45.10556 -116.67833); UTM N4994500 E525300 Z11N; PLSS line# 1: Meridian- Boise, TWNSHP 020N, RNG 003W, Sect 02,03, Sect_fract .

Comment (Production): Mine Was Developed In 1971 With Production Beginning In Late 1971. Production Came From An Underground Operation Until 1974 When Open Pitting Was Begun. Production Is Ongoing. Mine Ceased Operation In 1981. Reserves At The Property Are 200,000 S.T. At Low Grade Ore. The Operators Have No Plans To Re-Open The Mine In The Forseeable Future. The On-Site Concentrator Was Completely Refurbished In 1982, And Will Go On-Stream In July 1984, Processing Ore From The The Bayhorse, Iron Dyke, And Red Lodge Mines.

Comment (Reserve-Resource): At Production Rate Of 800 Tons/Day, Item 1 Reserves Good For 8 Years; Item 2 Has Been Mined And Stockpiled

Comment (Production): Items 8 And 9 Production For Sept. 1972 - Nov. 1973 ; Mill Treated 225 - 250 Tons/Day In 1972 , By 1973 Production Up To 800 Tons/Day; Item 17 From 10 Cars Of Ore

Comment (Workings): Mine Was Started Underground, Is Now An Open-Pit


Reference (Deposit): Morganti, J. M., 1972, Geology And Ore Deposits Of The Cuprum Area, Seven Devils Mining District, Hells Canyon, Idaho: Pullman, Wash., Wash. State Univ., M S Thesis, 153 P.

Reference (Deposit): Idaho Dept. Of Labor And Industrial Services, First Annual Report Addendum, July 1 , 1974 - June 30 , 1975 , 95 P.

Reference (Deposit): Long, R.C., 1976 , Geology And Mineral Deposits Of The Red Ledge Mine Area, Adams County, Idaho: Corvallis, Oregon, Oregon State Univ., M.S. Thesis, 115 P.

Reference (Deposit): Spokane Chronicle, Jan. 31 , 1973 ; Nov. 9 , 1973

Reference (Deposit): Mining Record, Dec. 6 , 1972

Reference (Deposit): 1975 Compile Idaho Dept. Labor And Ind. Services, First Ann. Rept

Reference (Deposit): John Kauffman Mas Deposit Summary Report On Copper Cliff Mine.

Reference (Deposit): U.S. Bureau Of Mines Liaison Office Report On Mining Operations, 1972 And 1977.

Reference (Deposit): Mesa Report December 1975.

Reference (Deposit): Havenstrite, Stuart, Executive Vice President, Silver King Mines, Inc., Personal Communications With Russell G. Raney, Wfoc, May 3, 1984.

Reference (Deposit): Mining Record, 3-22-89, P1.

Reference (Deposit): The Miner'S News, 6-89, P.6b.

Reference (Reserve-Resource): American Mines Handbook 1989, P.127.

Idaho Gold

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