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The Calumet and Hecla Mining Company was a major copper-mining company based in the Michigan Copper Country. In the 19th century, the company paid out more than $72 million in shareholder dividends, more than any other mining company in the United States during that period. ==History== In 1864, Edwin J. Hulbert discovered a copper-bearing section of what became known as the Calumet Conglomerate of Precambrian age. The find was in Houghton County, Michigan, between the rich Cliff mine to the northeast, and the copper mines of Portage Lake to the southwest, but a long way from either. Hulbert formed the Calumet Company in 1865, with Boston investors.〔C. Harry Benedict, (1952) ''Red Metal'', Ann Arbor: University of Michigan Press, p.28-39.〕 The company spun off the Hecla Company the following year, and assigned shares in the new company to Calumet shareholders. Hulbert was a major shareholder in both companies, and was in charge of mine operations. But despite the rich ore, Hulbert did not have the practical knowledge to dig out the ore, crush it, and concentrate it. Frustrated with Hulbert’s lack of success, the company sent Alexander Agassiz, son of famous geologist Louis Agassiz to Michigan to run the mine. Under Agassiz’ expert management, the Hecla company paid its first dividend in 1868, and the Calumet company began paying dividends in 1869. The two companies merged in May 1871 to form the Calumet & Hecla Mining Company, with Quincy Adams Shaw as its first president. In August of that year, Shaw retired to the board of directors and Agassiz became president, a position he held until his death. The town of Red Jacket (now named Calumet) formed next to the mine.〔Horace J. Stevens (1902) ''The Copper Handbook'', v.2, Houghton, Mich.: Horace J. Stevens, p.133-144.〕 Calumet and Hecla built itself into a copper mining colossus. From 1868 through 1886, it was the leading copper producer in the United States, and from 1869 through 1876, the leading copper producer in the world.〔Horace J. Stevens (1908) ''The Copper Handbook'', v.8, Houghton, Mich.: Horace J. Stevens, p.1457.〕 From 1871 through 1880, Calumet and Hecla turned out more than half the copper produced in the United States. In each year save one between 1870 and 1901, Calumet and Hecla made most of the copper produced in the Michigan copper district.〔Horace J. Stevens (1902) ''The Copper Handbook'', v.2, Houghton, Mich.: Horace J. Stevens, p.1457,1466.〕 By 1901 the underground mining complex had 16 shafts. The company operated a large ore treatment facility at Lake Linden, Michigan. The first smelter was built at Hancock, Michigan, but in 1887, the company moved its smelting to the new smelter at Lake Linden. The company later built a second smelter at Buffalo, New York, which took advantage of the cheap electricity generated from Niagara Falls to electrolytically refine copper. The Buffalo Smelting Works was listed on the National Register of Historic Places in 2011. Electrolytic refining had the advantage that it separated out the silver from the copper. Annual copper production from the mines peaked in 1906 at 100 million pounds (45,000 metric tons), then declined to 67 million pounds (30,000 metric tons) by 1912 in response to lower prices. Output dropped to 46 million pounds (21,000 metric tons) of refined copper in the strike year of 1913, but rebounded due to high copper prices during World War I to 77 million pounds (35,000 metric tons) in 1917. The boost in production was attained partly by purchase of the Tamarack Mining Company in 1917.〔''Mineral Resources of Michigan, 1917'', Michigan Geological Survey, Publication 27, Geological Series 22.〕 But copper prices fell drastically after the war, and in 1921 copper production fell to 15 million pounds (6,800 metric tons) as the company shut the Osceola (amygdaloid) mine in 1920, and shut down mining on the Calumet conglomerate in April 1921.〔''Mineral Resources of Michigan, 1921'', Michigan Geological Survey, Publication 33, Geological Series 27.〕 Copper production rebounded in 1922, and rose steadily through the 1920s. Calumet and Hecla grew in the 1920s by buying and merging with neighboring copper mines. In 1923, Calumet and Hecla merged with the Ahmeek, Allouez, and Centennial mining companies. The combined entity was renamed the Calumet and Hecla Consolidated Copper Company. The merged company essentially controlled all the operating copper mines north of Hancock, Michigan. The company had always disposed of the mill tailings (locally called stamp sands) in lakes adjacent to the mills, but about 1900 began investigating methods to recover the copper remaining in the waste tailings. Beginning in 1915, C&H began reprocessing the stamp sands at Lake Linden, using a finer grind and ammonia leaching. Once the process proved profitable, the Tamarack mill also began reprocessing tailings. Through 1949, the company had recovered 535 million pounds (243,000 metric tons) of copper by reprocessing tailings.〔C. Harry Benedict (1952) ''Red Metal'', Ann Arbor: Univ. Mich. Press, p.177-193, 209.〕 One of the dredges used, Calumet and Hecla Dredge Number One, is currently sunk in shallow water in Torch Lake. By 1902, Calumet and Hecla had 5,000 employees, and the towns of Calumet (then named Red Jacket), Laurium, and Lake Linden were virtual company towns. The mining superintendents (called “captains”) were traditionally Cornishmen; the workers were Finns, Poles, Italians, Irish, and other immigrant nationalities. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Calumet and Hecla Mining Company」の詳細全文を読む スポンサード リンク
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