Kennecott Copper Corporation, Leaching Plant, On Copper River & Northw...
Significance: The original leaching plant (now the south end of the building) was constructed in 1915 and went into production the next year. The first four leaching tanks could process 300 tons of ore per day... More
Kennecott Copper Corporation, Leaching Plant, On Copper River & Northw...
Significance: The original leaching plant (now the south end of the building) was constructed in 1915 and went into production the next year. The first four leaching tanks could process 300 tons of ore per day... More
Kennecott Copper Corporation, Leaching Plant, On Copper River & Northw...
Significance: The original leaching plant (now the south end of the building) was constructed in 1915 and went into production the next year. The first four leaching tanks could process 300 tons of ore per day... More
Bullfrog Mine, Rhyolite, Nye County, NV
Significance: Associated with the strikes that set off one of the last major gold mining booms in the Southwest. These strikes had a major impact upon the regional settlement patterns and economic activities o... More
Gold Placers Incorporated, Coak Creek Dredge, Near Coal Creek & Yukon ...
Significance: In 1934, Charles Janin, a prominent San Francisco mining engineer, designed a 4-cubic-foot dredge for Gold Placers Incorporated, a newly formed mining company organized by General A.D. McRae of Va... More
Quincy Mining Company, Hancock, Houghton County, MI
Significance: Quincy was Michigan's second largest copper producer, and one of national and international importance. The mine was extremely long-lived and profitable. Unprocessed Field note material exists f... More
Quincy Mining Company, Hancock, Houghton County, MI
Significance: Quincy was Michigan's second largest copper producer, and one of national and international importance. The mine was extremely long-lived and profitable. Unprocessed Field note material exists f... More
Quincy Mining Company, Hancock, Houghton County, MI
Significance: Quincy was Michigan's second largest copper producer, and one of national and international importance. The mine was extremely long-lived and profitable. Unprocessed Field note material exists f... More
Butte Mineyards, Anselmo Mine, Butte, Silver Bow County, MT
Survey number: HAER MT-36-A Building/structure dates: 1911-1912 Initial Construction Building/structure dates: 1936-1937 Subsequent Work Building/structure dates: ca. 1950 Subsequent Work
Butte Mineyards, Anselmo Mine, Butte, Silver Bow County, MT
Survey number: HAER MT-36-A Building/structure dates: 1911-1912 Initial Construction Building/structure dates: 1936-1937 Subsequent Work Building/structure dates: ca. 1950 Subsequent Work
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, Concentration Mill, On Copper River & No...
Significance: The Concentration Mill was a dynamic, ever changing structure. Its form reflected the ever-increasing complexity of the ores mined at Kennecott. The building was first erected in 1908 as the low... More
Kennecott Copper Corporation, Concentration Mill, On Copper River & No...
Significance: The Concentration Mill was a dynamic, ever changing structure. Its form reflected the ever-increasing complexity of the ores mined at Kennecott. The building was first erected in 1908 as the low... More
Kennecott Copper Corporation, Concentration Mill, On Copper River & No...
Significance: The Concentration Mill was a dynamic, ever changing structure. Its form reflected the ever-increasing complexity of the ores mined at Kennecott. The building was first erected in 1908 as the low... More