Argo Mill [1] | |
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Location | 2517 Riverside Dr., Idaho Springs, Colorado |
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Coordinates | 39°44′34″N105°30′24″W / 39.742867°N 105.506612°W |
Built | 1912 |
NRHP reference No. | 78000836 [2] |
CSRHP No. | 5CC.76 [3] |
Added to NRHP | January 31, 1978 |
The Argo Gold Mine and Mill is a former gold mining and milling property in Idaho Springs, Colorado, featuring an intact gold mill built at the entrance of the Argo Tunnel. The tunnel was built between 1893 and 1910 to drain the gold mines in Virginia Canyon, Gilpin Gulch, Russell Gulch, Quartz Hill, Nevadaville, and Central City and allow easier ore removal. The success of the tunnel as an access route meant that a large volume of ore began exiting at the Idaho Springs entrance and a large mill was built to process it. At the time it was one of the largest such tunnels and milling operations in the world, directly recovering nearly $100 million in gold (11.2 million ounces) valued in 2023 at $10.1 trillion. [4] [5] They also sent another $200 million of high-value ores to smelters in Denver. [6]
The property was closed in January 1943 after a major hydraulic accident in the tunnel, and never reopened after a federal moratorium was placed on gold mining during World War II. In 1976 it was purchased by a local investment group led by James N. Maxwell, who wanted to preserve an example of the Colorado gold rush mines. It was renovated and reopened as a tourist attraction and mining museum, and presently continues to offer daily tours. [7] It was added to the National Register of Historic Places in January 1978. [2]
The Argo Mill is open all year for tours, weather permitting. Visitors are provided with a brief history movie, an ore sample and mining equipment demonstration, a tour of the now-reopened tunnel entrance, and a descending tour of the mill structure and extant equipment including gravity separators, amalgamation trays, and froth flotation cells. An indoor museum on the bottom level includes many mining artifacts. An outdoor museum, partly visible from the street, includes larger period equipment used in various stages of extraction, separation, and smelting. A gold panning experience is provided to tour visitors. The outdoor museum and gold panning can also be experienced as a stand-alone attraction. [8]
Leadville is a statutory city that is the county seat, the most populous community, and the only incorporated municipality in Lake County, Colorado, United States. The city population was 2,633 at the 2020 census. It is situated at an elevation of 10,119 feet (3,084 m). Leadville is the highest incorporated city in the United States and is surrounded by two of the tallest peaks in the state.
The City of Idaho Springs is the statutory city that is the most populous municipality in Clear Creek County, Colorado, United States. Idaho Springs is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. As of the 2020 census it had a population of 1,782. Idaho Springs is located in Clear Creek Canyon, in the mountains upstream from Golden, some 30 miles (50 km) west of Denver.
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Black Hawk is a Home Rule City located in Gilpin County, Colorado, United States. The population was 127 at the 2020 United States Census, making it the least populous city in Colorado. It was a mining settlement founded in 1859 during the Pike's Peak Gold Rush and is now a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
The City of Victor is a Statutory City in Teller County, Colorado, United States. Gold was discovered in Victor in the late 19th century, an omen of the future of the town. With Cripple Creek, the mining district became the second largest gold mining district in the country and realized approximately $10 billion of mined gold in 2010 dollars. It reached its peak around the turn of the century when there were about 18,000 residents in the town. Depleted ore in mines, labor strife and the exodus of miners during World War I caused a steep decline in the city's economy, from which it has never recovered. The population was 379 at the 2020 census. There is a resumed mining effort on Battle Mountain.
A gold rush or gold fever is a discovery of gold—sometimes accompanied by other precious metals and rare-earth minerals—that brings an onrush of miners seeking their fortune. Major gold rushes took place in the 19th century in Australia, Greece, New Zealand, Brazil, Chile, South Africa, the United States, and Canada while smaller gold rushes took place elsewhere.
Bayhorse is a ghost town in Custer County, Idaho, United States, founded in 1877, though active development of the town did not begin until 1880. Bayhorse was once a thriving mining town, principally supported by large nearby silver deposit. In 1882, the town increased its smelting capabilities, producing $300,000 worth of silver over the course of the year. By 1885, the town had grown to 300 residents, supported by a mill, three stores, a hotel, a restaurant, a meat market, a lodging house, and five saloons. The same year, the town built a refinery, allowing the mining industry to issue silver bars and by 1900, the town had extracted over $10 million in total ores, including silver, lead, and copper.
Empire Mine State Historic Park is a state-protected mine and park in the Sierra Nevada mountains in Grass Valley, California, U.S. The Empire Mine is on the National Register of Historic Places, a federal Historic District, and a California Historical Landmark. Since 1975 California State Parks has administered and maintained the mine as a historic site. The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California". Between 1850 and its closure in 1956, the Empire Mine produced 5.8 million ounces of gold, extracted from 367 miles (591 km) of underground passages.
The Idarado Mine was a mining operation in the San Juan Mountains of Ouray County, Colorado near the now-ghost town of Guston, producing primarily lead, zinc and silver along with small amounts of gold and copper. The mine is within the Sneffels-Red Mountain-Telluride mining district. The remains of the operation are visible from the Million Dollar Highway, north of Red Mountain Pass, between Ouray and Silverton, Colorado. The tunnels of the Idarado extend some 5 miles (8 km) west under 13,000 foot mountains to the Pandora Mill near Telluride, a trip of more than 60 miles (100 km) by highway.
Eben Smith was a successful mine owner, smelting company executive, railroad executive and bank owner in Colorado in the late 19th century and early 20th century.
Gold mining in Colorado, a state of the United States, has been an industry since 1858. It also played a key role in the establishment of the state of Colorado.
The Shenandoah-Dives Mill or Mayflower Mill is an intact and functional but inactive historic ore mill 2 miles (3.2 km) east of Silverton, Colorado, United States. The mill was built in 1929 to recover gold, silver, lead, zinc, and copper from ore mined at the Mayflower mine and brought to the mill by an aerial tramway. Regularly active until 1945, it houses still-functional equipment for the separation by flotation of metals from crushed ores. It is the only intact and functional mill of its kind in Colorado. It was included in the expanded Silverton Historic District in 1997, and was declared a National Historic Landmark on its own in 2000. The mill is owned by the San Juan County Historic Society, which staffs an information and gift shop at the mill under the name Mayflower Mill. The mill is open for self-guided tours in the summer months.
The Leadville mining district, located in the Colorado Mineral Belt, was the most productive silver-mining district in the state of Colorado and hosts one of the largest lead-zinc-silver deposits in the world. Oro City, an early Colorado gold placer mining town located about a mile east of Leadville in California Gulch, was the location to one of the richest placer gold strikes in Colorado, with estimated gold production of 120,000–150,000 ozt, worth $2.5 to $3 million at the then-price of $20.67 per troy ounce.
Hecla Mining is a gold, silver, and other precious metals mining company based in Coeur d'Alene, Idaho. Founded in 1891, it is the second-largest mining company that produces silver in the country. This area is known as the Silver Valley (Idaho). In 1983, this entire area was designated as a Superfund site by the Environmental Protection Agency, because of land, water, and air contamination resulting from a century of mostly unregulated silver and gold mining.
The Argo Tunnel is a 4.16-mile (6.69 km) mine drainage and access tunnel with its portal at Idaho Springs, Colorado, USA. It was originally called the Newhouse Tunnel after its primary investor, Salt Lake City mining magnate Samuel Newhouse, and appears by that name in many industry publications from the time period when it was constructed. The tunnel intersected nearly all the major gold mines between Idaho Springs and Central City, and is the longest such drainage tunnel in the Central City-Idaho Springs mining district.
The Golden Fleece Mine is a gold mining site in Hinsdale County, Colorado, 5 miles (8 km) south of Lake City. The mine is located half a mile west of the north end of Lake San Cristobal. By 1904 it had produced $1,400,000 in silver and gold ore. The mine operated intermittently until 1919. Later, in the mid-1960s, some renewed interest in the property came up, especially in the Hiwassee lode area of the mine, but other than a couple of small test shipments, there is no recorded production until today.
The Cripple Creek & Victor Gold Mine, formerly and historically the Cresson Mine, is an active gold mine located near the town of Victor, in the Cripple Creek mining district in the US state of Colorado. The richest gold mine in Colorado history, it is the only remaining significant producer of gold in the state, and produced 322,000 troy ounces of gold in 2019, and reported 3.45 million troy ounces of Proven and Probable Reserves as at December 31, 2019. It was owned and operated by AngloGold Ashanti through its subsidiary, the Cripple Creek & Victor Gold Mining Company (CC&V), until 2015, when it sold the mine to Newmont.
The Cripple Creek Gold Rush was a period of gold production in the Cripple Creek area from the late 1800s until the early 1900s. Mining exchanges were in Cripple Creek, Colorado Springs, Pueblo and Victor. Smelting was in Gillett, Florence, and (Old) Colorado City. Mining communities sprang up quickly, but most lasted only as long as gold continued to be produced. Settlements included:
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