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Newhouse Tunnel and Argo Mill

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1893–1910. 2350 Riverside Dr. (NR)
  • (Carol M. Highsmith Archive, Prints and Photographs Division, Library of Congress)
  • (Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division)

Conceived by Samuel Newhouse (1853–1930), a New York entrepreneur, this $5 million tunnel served many mines and intersected numerous veins of ore with a 21,968-foot bore that ended in Eureka Gulch, just west of Central City in Gilpin County. The tunnel is 8 feet tall and wide and without shoring, as it is carved from solid rock. Two seven-ton Westinghouse electric locomotives moved three-ton ore cars until a serious accident closed the tunnel for good in 1943.

The Argo Mill at the Idaho Springs mouth of the Newhouse Tunnel opened in 1913. The seven-story, steel-frame mill with corrugated metal covering is terraced up the mountain-side along Clear Creek and surrounded by tailing dumps. It is open to tourists, as is the nearby Edgar Mine of the Colorado School of Mines.

Writing Credits

Thomas J. Noel

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