The 14-story Kennicott Concentration Mill (to the right). The mines are 5 miles up in the mountains to the east/northeast. Also pictured: foreground (left to right): power plant, machine shop, flotation plant, ammonia leaching plant (world's first); in the trees to the right - general manager's office (the log cabin portion was the first building built in Kennicott)
Location
East of Kennicott Glacier, about 6.5 miles (10.5km) north of McCarthy
In the summer of 1900, two prospectors, "Tarantula" Jack Smith and Clarence L. Warner,[5] a group of prospectors associated with the McClellan party, spotted "a green patch far above them in an improbable location for a grass-green meadow." The green turned out to be malachite, located with chalcocite (aka "copper glance"), and the location of the Bonanza claim. A few days later, Arthur Coe Spencer, U.S. Geological Surveygeologist independently found chalcocite at the same location, but was too late to stake any valuable claims.[6]:53–55[7]
Stephen Birch, a mining engineer just out of school, was in Alaska looking for investment opportunities in minerals. He had the financial backing of the Havemeyer Family, and another investor named James Ralph, from his days in New York. Birch spent the winter of 1901-1902 acquiring the "McClellan group's interests" for the Alaska Copper Company of Birch, Havemeyer, Ralph and Schultz, later to become the Alaska Copper and Coal Company. In the summer of 1901, he visited the property and "spent months mapping and sampling." He confirmed the Bonanza mine and surrounding by deposits were, at the time, the richest known concentration of copper in the world.[6]:35,55–56,59,73
By 1905, Birch had successfully defended the legal challenges to his property and he began the search for capital to develop the area. On June 28, 1906, he entered into "an amalgamation" with the Daniel Guggenheim and J.P. Morgan & Co., known as the Alaska Syndicate, eventually securing over $30 million. The capital was to be used for constructing a railway, a steamship line, and development of the mines. In Nov. 1906, the Alaska Syndicate bought a 40 percent interest in the Bonanza Mine from the Alaska Copper and Coal Company and a 46.2 percent interest in the railroad plans of John Rosene's Northwestern Commercial Company.[6]:57,71–73
Political battles over the mining and subsequent railroad were fought in the office of U.S. PresidentTheodore Roosevelt between conservationists and those having a financial interest in the copper.[6]:88[7]:42
The Alaska Syndicate traded its Wrangell Mountains Mines assets for shares in the Kennecott Copper Corporation, a "new public company" formed on April 29, 1915. A similar transaction followed with the CR&NW railway and the Alaska Steamship Company. Birch was the managing partner for the Alaska operation.[6]:75,212–213
Kennecott Mines was named after the Kennicott Glacier in the valley below. The geologist Oscar Rohn named the glacier after Robert Kennicott during the 1899 US Army Abercrombie Survey. A "clerical error" resulted in the substitution of an "e" for the "i", supposedly by Stephen Birch himself.[6]
Kennecott had five mines: Bonanza, Jumbo, Mother Lode, Erie and Glacier. Glacier, which is really an ore extension of the Bonanza, was an open-pit mine and was only mined during the summer. Bonanza and Jumbo were on Bonanza Ridge about 3mi (4.8km) from Kennecott. The Mother Lode mine was located on the east side of the ridge from Kennecott. The Bonanza, Jumbo, Mother Lode and Erie mines were connected by tunnels. The Erie mine was perched on the northwest end of Bonanza Ridge overlooking Root Glacier about 3.7mi (6.0km) up a glacial trail from Kennecott. Ore was hoisted to Kennecott via the trams which head-ended at Bonanza and Jumbo. From Kennecott the ore was hauled mostly in 140-pound sacks on steel flat cars to Cordova, 196 rail miles away, via the Copper River and Northwestern Railway (CRNW).
In 1911 the first shipment of ore by train transpired. Before completion, the steamshipChittyna carried ore to the Abercrombie landing by Miles Glacier. Initial ore shipments contained "72 percent copper and 18 oz. of silver per ton."[6]:135[7]:44,66–67
In 1916, the peak year for production, the mines produced copper ore valued at $32.4 million.
The Kennecott hospital (left) stood out as the town's only white-washed building. The vast majority of other town structures, including workers' bunkhouses (right), were painted red, the least expensive color at the time. The Kennecott hospital was also the site of the first X-ray machine in Alaska.
In 1925 a Kennecott geologist predicted that the end of the high-grade ore bodies was in sight. The highest grades of ore were largely depleted by the early 1930s. The Glacier Mine closed in 1929. The Mother Lode was next, closing at the end of July 1938. The final three, Erie, Jumbo and Bonanza, closed that September. The last train left Kennecott on November 10, 1938, leaving it a ghost town.
From 1909 until 1938, except when it closed temporarily in 1932, Kennecott mines "produced over 4.6 million tons of ore that contained 1.183 billion pounds of copper mainly from three ore bodies: Bonanza, Jumbo and Mother Lode."[6]:260[7]:74 The Kennecott operations reported gross revenues above $200 million and a net profit greater than $100 million.[8]
In 1938, Ernest Gruening proposed Kennecott be preserved as a National Park. A recommendation to President Franklin D. Roosevelt on January 18, 1940, for the establishment of the Kennecott National Monument went nowhere. However, December 2, 1980, saw the establishment of the Wrangell-St. Elias National Park and Preserve.[6]:261–262,321
From 1939 until the mid-1950s, Kennecott was deserted except for a family of three who served as the watchmen until about 1952. In the late 1960s, an attempt was made to reprocess the tailings and to transport the ore in aircraft. The cost of doing so made the idea unprofitable. Around the same time, the company with land rights ordered the destruction of the town to rid them of liability for potential accidents. A few structures were destroyed, but the job was never finished and most of the town was left standing. Visitors and nearby residents have stripped many of the small items and artifacts. Some have since been returned and are held in various archives.
KCC sent a field party under the geologist Les Moon in 1955. They agreed with the 1938 conclusion, "no copper resource of a size and grade sufficient to interest KCC remained." The mill and other structures remain, however, and many are in the process of being restored.[6]:7[9]
Kennecott first reported on the 1920 U.S. Census as an unincorporated village. It appeared again in 1930 and 1940, and after its abandonment, it has not reported separately since. It is now within the McCarthy CDP.
Geology
Copper ore was discovered in a lode on Chief Nikolai's house at the mouth of Dan Creek in July 1899. The geological formations in the area were described and identified by a USGS geologist by the name of Oscar Rohn in 1899. This original copper find became the basis of the Nikolai Mine in 1900. Simultaneously, placer gold was discovered on the Dan and Young Creeks. The Bonanza ore body was discovered in Aug. 1900 by Warner and Smith. Almost simultaneously, another USGS geologist named Arthur Spencer, came across the ore when mapping the area with Frank Schrader. In 1901, the Dan Creek was staked by C.L. Warner and "Dan" L. Kain. Gold was found on Chititu Creek in April 1902 by Frank Kernan and Charles Koppus.[5]:12,75–77[6]:53–55
Map of the Chitina River valley. "x" depicts a copper prospect while "+" depicts a gold placer.
Geologic map of the Kennecott and Bonanza Mine area. "ng" is the Nikolai greenstone formation, "Trc" is the Chitistone limestone formation, while "Qrg" are rock glaciers.
Kennecott Mines National Historic Landmark marker for the geologic outcrop
Kennecott Mines National Historic Landmark marker for the ore body
Kennecott Mines National Historic Landmark marker for the mine shafts
Topographic map showing the location of the Erie, Jumbo, Mother Lode, Bonanza and Glacier Mines in relation to Kennecott. Note the aerial tramways and haulage tunnels.
Concentration Mill
Copper extraction was a many step process in an attempt to be as efficient as possible. Chalcocite and covellite were sent directly to the smelting plant in Tacoma. Malachite, azurite, and other forms of copper within the limestone needed separation in the 14-story mill building before shipment. The mill was mainly built between 1909 and 1923. Ore arrived at the mill via aerial tramways, where the high-grade portion (approximately 60% copper) was crushed and placed in a chute to carry it directly to the bottom to be placed in burlap sacks. Lower-grade ore was further crushed, sized and sorted. The denser ore was separated from the less dense waste via Hancock jigs and shaker tables. The tailings left over after gravity separation were further treated via ammonialeaching, for the coarse material, or via froth flotation for the fine material. The ammonia leaching plant was built in 1915, where ammonia liquefied the copper but kept the limestone in solid form. The ammonia-copper solution was heated to drive off the ammonia, which left behind a copper oxide containing 75% copper. This was then sacked for shipment. The flotation plant was built in 1923 to process the "fines", which were less than 0.3cm in size. These fines were mixed with water, oil, and buffering chemicals, before air was bubbled through the solution. Copper ore attached to the air bubbles, and floated to the top, where it was skimmed off, dried and sacked.
Kennecott Mines National Historic Landmark marker for the mill town
Kennecott-based tour groups now lead visitors on guided tours of the fourteen story concentration mill
Kennecott Mines National Historic Landmark mine tramway ore car
Tourism
In the 1980s, Kennecott became a popular tourist destination, as people came to see the old mines and buildings. However, the town of Kennecott was never repopulated. Residents involved in the tourism industry often lived in nearby McCarthy or on private land in the surrounding area. The area was designated a National Historic Landmark in 1986 and the National Park Service acquired much of the land within the Kennecott Mill Town in 1998.
Popular tourist activities while visiting Kennecott include glacier hiking, ice climbing, and touring the abandoned mill. Visitors may also hike to the abandoned Bonanza, Jumbo and Erie mines, all of which are strenuous full-day hikes, with Erie Mine being a somewhat terrifying scramble along cliffs overlooking the Stairway Icefall. Local guide services offer all of these hikes if one would like some route-finding assistance.
Accessibility
Kennecott is now accessible by air (McCarthy has a 3,500 foot (1,100m) meter gravel runway) or by driving on the Edgerton Highway to the McCarthy Road, an unimproved gravel road. The McCarthy Road ends at the Kennicott River and a footbridge is available for pedestrian traffic to McCarthy. From McCarthy, it is 4.5 miles (7.2km) to Kennecott, and shuttles are available.
Chitina is a census-designated place (CDP) in Copper River Census Area, Alaska, United States. At the 2010 census the population was 126, up from 123 in 2000.
McCarthy is a census-designated place (CDP) in Copper River Census Area, Alaska, United States. It is in Wrangell-St. Elias National Park and Preserve. The population was 107 at the 2020 census, up from 28 in 2010.
The Miles Glacier Bridge, also known as the Million Dollar Bridge, was built in the early 1900s across the Copper River fifty miles from Cordova in what is now the U.S. state of Alaska. It is a multiple-span Pennsylvania truss bridge which completed a 196-mile (315 km) railroad line for the Copper River and Northwestern Railway, built by J. P. Morgan and the Guggenheim family to haul copper from the old mining town of Kennicott, now located within the Wrangell–St. Elias National Park and Preserve, to the port of Cordova. It earned its nickname because of its $1.4 million cost, well recouped by the about $200 million worth of copper ore which was shipped as a result of its construction.
Wrangell–St. Elias National Park and Preserve is an American national park and preserve managed by the National Park Service in south central Alaska. The park and preserve were established in 1980 by the Alaska National Interest Lands Conservation Act. The protected areas are included in an International Biosphere Reserve and are part of the Kluane/Wrangell–St. Elias/Glacier Bay/Tatshenshini-Alsek UNESCO World Heritage Site. The park and preserve form the largest area managed by the National Park Service with a total of 13,175,799.07 acres, an expanse larger than nine U.S. states and around the same size as Bosnia and Herzegovina or Croatia. 8,323,147.59 acres are designated as the national park, and the remaining 4,852,652.14 acres are designated as the preserve. The area designated as the national park alone is larger than the 47 smallest American national parks combined and is more than twice the size of all but two other national parks. Its area makes up over 15% of all national park designated land in the United States.
The Copper River and Northwestern Railway (CR&NW) consisted of two rail lines, the Copper River line and the Northwestern line. Michael James Heney had secured the right-of-way up the Copper River in 1904. He started building the railway from Cordova, Alaska in 1906. The town of Cordova, Alaska, was actually named by Heney on March 13, 1906, based on the original name given by Salvador Fidalgo. Both these railroads were abandoned and little remains of them. A 0-4-0 locomotive, "Ole", located near Goose City on a siding of the Alaska Anthracite Railroad Company is the only equipment left. Many of the holdings of the CR&NW railroad including Ole were acquired for this railroad by Mr. Clark Davis and his partners in 1908 after a major storm destroyed the Katalla area facilities in 1907. The town of Cordova would like to move Ole to a memorial site in Cordova to celebrate its role in these railroads. Ole was declared eligible for the National Register of Historic Places in 1988.
Mount Blackburn is the highest peak in the Wrangell Mountains of Alaska in the United States. It is the fifth-highest peak in the United States and the twelfth-highest peak in North America. The mountain is an old, eroded shield volcano, the second-highest volcano in the U.S. behind Mount Bona and the fifth-highest in North America. It was named in 1885 by Lt. Henry T. Allen of the U.S. Army after Joseph Clay Stiles Blackburn, a U.S. senator from Kentucky. It is located in the heart of Wrangell – St. Elias National Park, the largest national park in the country.
Kennicott Glacier is a glacier in the U.S. state of Alaska. It trends southeast 43 km (27 mi) from Mount Blackburn to its terminus at the head of the Kennicott River in the Wrangell Mountains. It is located in Wrangell-St. Elias National Park near the small town of McCarthy, Alaska and the historic ghost town of Kennecott, Alaska.
The McCarthy Road is a gravel-surfaced road that runs from the end of the Edgerton Highway in Chitina, Alaska, to about 1 mile (1.6 km) outside of McCarthy, Alaska.
The Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals, is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, in the Oquirrh Mountains. The mine is the largest man-made excavation, and deepest open-pit mine in the world, which is considered to have produced more copper than any other mine in history – more than 19,000,000 short tons. The mine is owned by Rio Tinto Group, a British-Australian multinational corporation. The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery. The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 miles (1,210 m) deep, 2.5 miles (4 km) wide, and covering 1,900 acres. It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine. The mine experienced a massive landslide in April 2013 and a smaller slide in September 2013.
Stephen Birch (1873–1950) was a President of the Kennecott Copper Company.
In the United States, copper mining has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2017, the US produced 1.27 million metric tonnes of copper, worth $8 billion, making it the world's fourth largest copper producer, after Chile, China, and Peru. Copper was produced from 23 mines in the US. Top copper producing states in 2014 were Arizona, Utah, New Mexico, Nevada, and Montana. Minor production also came from Idaho, and Missouri. As of 2014, the US had 45 million tonnes of known remaining reserves of copper, the fifth largest known copper reserves in the world, after Chile, Australia, Peru, and Mexico.
Gold mining in Alaska, a state of the United States, has been a major industry and impetus for exploration and settlement since a few years after the United States acquired the territory in 1867 from the Russian Empire. Russian explorers discovered placer gold in the Kenai River in 1848, but no gold was produced. Gold mining started in 1870 from placers southeast of Juneau, Alaska.
The Bremner Historic Mining District is a historic district in Wrangell-St. Elias National Park and Preserve in Alaska. It is named after John Bremner, who in 1884-1885 was the first non-native person to live in the area and who prospected for gold along the Bremner River. Located just to the north of the Bremner River, it was the scene of an important placer gold discovery in 1902, and played a key role in the history of the Copper River Basin. Only a few miners struck it rich, but the resulting demand for materials and supplies helped establish regional transportation networks, encouraged supporting industries, and hastened the exploration and settlement of the entire region. While small-scale placer mining continued for over forty years, lode development was largely confined to the period between 1934 and 1941, the district's most significant era.
In an effort to thwart statehood and Alaskan home rule from Washington D.C., the Alaska Syndicate, was formed in 1906 by J. P. Morgan and Simon Guggenheim. The Syndicate purchased the Kennicott-Bonanza copper mine and had majority control of the Alaskan steamship and rail transportation. The syndicate also was in charge of a large part of the salmon industry.
The McCarthy Power Plant, also known as the Mother Lode Coalition Mining Company Power House and the Mother Lode Plant, is a historic power plant building in the small community of McCarthy, Alaska, in the heart of Wrangell-St. Elias National Park and Preserve. It is a three-story wood-frame structure with a clerestory roof, located on the banks of McCarthy Creek. It was built in 1917, after the arrival of the Copper River and Northwestern Railway in the area kicked of a building boom. The coal-fired power plant was built to provide electricity for the operation of a tramway and other facilities of the Kennecott mines. Most of the transmission lines and the tramway were destroyed by avalanches in 1919, and other changes made soon afterward made the power plant unnecessary, and its turbine was moved up to Kennecott.
Donoho Peak is a 6,696-foot-elevation mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, 6 mi (10 km) north-northwest of Kennecott, and 9 mi (14 km) north of McCarthy, at the confluence of the Kennicott Glacier and Root Glacier. The peak's name was reported in 1931 by the United States Geological Survey. The mountain lies within the Copper River drainage basin. Bears frequent the Donoho Peak and Donoho Lakes area. An ascent of the mountain involves 14 miles round-trip from Kennecott to the summit, including crossing the Root Glacier and gully scramble via the south aspect of the mountain. Ruins of the Regal Mine remain at an elevation of 5,440 feet on the south slope of the mountain. Only small amounts of copper ore were ever produced, however. On a clear day the summit of Donoho Peak offers views of Mount Blackburn to the northwest and the Stairway Icefall on Regal Mountain to the north-northeast.
Fireweed Mountain is a prominent 6,956-foot mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, immediately west of the terminus of the Kennicott Glacier, and 5 mi (8 km) west-northwest of McCarthy. Precipitation runoff from the eight-mile-long by five-mile-wide mountain drains into tributaries of the Chitina River, which in turn is part of the Copper River drainage basin. The mountain's name was given in the 1920s by Molly Gilmore, a lifelong resident of the McCarthy area, who at age 17, named the mountain for the abundance of fireweed which grew on the mountain following forest fires. Although fireweed is the most common and well-known flower in Alaska, it is not commemorated on any other Alaskan mountain. The mountain's name was officially adopted in 1966 by the U.S. Board on Geographic Names. On a clear day the summit of Fireweed Mountain offers views of Mount Blackburn to the northwest, and Regal Mountain to the northeast.
Porphyry Mountain is a prominent 6,375-foot mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, immediately southeast of Kennecott, 4 mi (6 km) northeast of McCarthy, and, 5 mi (8 km) northwest of Sourdough Peak. Precipitation runoff from the mountain drains into tributaries of the Nizina River, which in turn is part of the Copper River drainage basin. The peak is notable for a rock glacier on its north slope. The mountain was so named because it is largely composed of porphyry, which is a very hard igneous rock. The mountain's local name was reported in 1908 by the U.S. Geological Survey. On a clear day the summit of Porphyry Mountain offers views of Donoho Peak, Kennicott Glacier, and Mount Blackburn to the northwest, and Fireweed Mountain to the west.
Bonanza Peak is a 6,983-foot mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak was notable for its abundance of copper deposits which were mined from 1909 through 1938. The peak is situated in Wrangell-St. Elias National Park and Preserve, immediately northeast of Kennecott, 7 mi (11 km) northeast of McCarthy, 3.46 mi (6 km) north of Porphyry Mountain, and 5.2 mi (8 km) southeast of Donoho Peak. The confluence of the Kennicott and Root Glaciers lies below the mountain's west slope. Precipitation runoff from the mountain drains into tributaries of the Nizina River, which in turn is part of the Copper River drainage basin. The mountain's local name was reported in 1914 by the U.S. Geological Survey. On a clear day the summit of Bonanza Peak offers views of Sourdough Peak, Mount Blackburn, and Fireweed Mountain.
Chitistone Mountain is a 6,844-foot (2,086-meter) mountain summit located at the southeastern edge of the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, 15 mi (24 km) east-northeast of McCarthy, 13 mi (21 km) east of Bonanza Peak, and 12 mi (19 km) north of Williams Peak, where it is wedged between the confluence of the Nizina River and Chitistone River.
1 2 "Kennecott Mines". National Historic Landmark summary listing. National Park Service. Archived from the original on July 21, 2010. Retrieved June 25, 2008.
1 2 3 Fred H. Moffit; Stephen R. Capps (1911). Geology and Mineral Resources of the Nizina District, Alaska, USGS Bulletin 448. U.S. Government Printing Office. p.76.
1 2 3 4 5 6 7 8 9 10 11 Charles Caldwell Hawley (2014). A Kennecott Story. The University of Utah Press. p.21.
1 2 3 4 Elizabeth A. Tower (1990). Ghosts of Kennecott, The Story of Stephen Birch. pp.12–14.
↑ Alfredo O. Quinn (1995). Iron Rails to Alaskan Copper. D'Aloguin Publishing Co. p.175.
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.
