Argo Gold Mine and Mill

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 valued in 2023 at $10.1 trillion. They also sent another $200 million of high-value ores to smelters in Denver.

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Location: 39.7429, -105.507, KML, Cluster Map, Maps,
6 places

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  Argo Gold Mine and Mill ⓘ
  United States historic place

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  Hidee Gold Mine ⓘ
  

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  Phoenix Gold Mine, Idaho Springs, Colorado ⓘ
  Gold mine in Colorado

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  Moffat Tunnel ⓘ
  rail tunnel in Colorado, USA

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  Riflesight Notch Loop ⓘ
  

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  Veterans Memorial Tunnels ⓘ
  road tunnels in Colorado, US

1903-01-01T00:00:00Z

1903-01-01T00:00:00Z

1903 Riflesight Notch Loop

1961-01-01T00:00:00Z

1961-01-01T00:00:00Z

1961 Veterans Memorial Tunnels

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Frameless

Argo Gold Mine & Mill

Argo Gold Mine

Mina de Ouro em Idaho Springs

Mines developed by the Newhouse Tunnel - DPLA - 086fdeabd205b0482fc6f306474efbdf

Cross-section of the Newhouse Tunnel - DPLA - 239ca4602977692ba6c8affe7862d01c

WATER THAT HAS BEEN POLLUTED BY MINERAL CONTENT SEEPS FROM THE ARGO MINE - NARA - 544795

WATER POLLUTED BY HIGH MINERAL CONTENT FLOWS FROM THE ABANDONED ARGO MINE - NARA - 544769

Idaho Springs CO - Argo Mill

Argo-Treatment-Plant

Argo-Tunnel-2009

Type	Subtype	Date	Description	Notes	Source
site	mine		Argo Gold Mine and Mill	gold mine, mining museum, factory	Wikidata
site	mine		Hidee Gold Mine	gold mine	Wikidata
site	mine		Phoenix Gold Mine, Idaho Springs, Colorado	gold mine	Wikidata
site	tunnel		Moffat Tunnel	water tunnel, Union Pacific Railroad, Denver and Salt Lake Railway, Denver and Rio Grande Western Railroad, railway tunnel	Wikidata
site	tunnel	1903	Riflesight Notch Loop	railway tunnel, railway bridge	Wikidata
site	tunnel	1961	Veterans Memorial Tunnels	road tunnel	Wikidata
commons	image		Argo Gold Mine & Mill		Commons
commons	image		Argo Gold Mine		Commons
commons	image		Mina de Ouro em Idaho Springs		Commons
commons	image		Mines developed by the Newhouse Tunnel - DPLA - 086fdeabd205b0482fc6f306474efbdf		Commons
commons	image		Cross-section of the Newhouse Tunnel - DPLA - 239ca4602977692ba6c8affe7862d01c		Commons
commons	image		WATER THAT HAS BEEN POLLUTED BY MINERAL CONTENT SEEPS FROM THE ARGO MINE - NARA - 544795		Commons
commons	image		WATER POLLUTED BY HIGH MINERAL CONTENT FLOWS FROM THE ABANDONED ARGO MINE - NARA - 544769		Commons
commons	image		Idaho Springs CO - Argo Mill		Commons
commons	image		Argo-Treatment-Plant		Commons
commons	image		Argo-Tunnel-2009		Commons