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]
^"Argo Tunnel and Mill nomination form". History Colorado. Retrieved 16 March 2013.
^ ab"National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.
^"Colorado State Register of Historic Properties – Clear Creek County". History Colorado. Archived from the original on 20 December 2016. Retrieved 16 March 2013.
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...
in 1910 for the purpose of mining gold during the Colorado Gold Rush. The Argo Tunnel served all major goldmines in Idaho Springs at the time. The main...
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drainage and access tunnels in the US. Later US mine drainage tunnels included the Argo Tunnel at Idaho Springs, Colorado, the Leadville and Yak tunnels...
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