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Henderson molybdenum mine

1976 establishments in Colorado3 ft 6 in gauge railways in the United StatesBuildings and structures in Clear Creek County, ColoradoFreeport-McMoRan minesMines in Colorado
Molybdenum mines in the United StatesUnderground mines in the United States
HendersonMineCO
HendersonMineCO

The Henderson molybdenum mine is a large underground molybdenum mine west of the town of Empire in Clear Creek County, Colorado, USA. The Henderson mine, which has produced molybdenum since 1976, is owned by Freeport-McMoRan. The Henderson mine is North America's largest producer of primary molybdenum. 2007 production was 40 million pounds of molybdenum, with a value of $1.1 billion.

Excerpt from the Wikipedia article Henderson molybdenum mine (License: CC BY-SA 3.0, Authors, Images).

Henderson molybdenum mine
Henderson Mine Road,

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Latitude Longitude
N 39.770277777778 ° E -105.83333333333 °
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Henderson Mine Road

Henderson Mine Road

Colorado, United States
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Berthoud Pass
Berthoud Pass

Berthoud Pass ( BURTH-əd; elevation 11,307 ft (3,446 m)) is a high mountain pass in central Colorado, in the Front Range of the Rocky Mountains of the western United States. The pass is located west of Denver, and provides a high route between upper Clear Creek Canyon to the upper valley of the Fraser River in Middle Park to the north. It traverses the continental divide at the Front Range, on the border between Clear Creek County and Grand County. The pass is named for Edward L. Berthoud, the chief surveyor of the Colorado Central Railroad during the 1870s. Accompanied by Jim Bridger, Berthoud discovered the pass in July 1861 while surveying a possible route for the railroad. Berthoud concluded that the pass was suitable as a wagon road, but not as a railroad, and was then hired by the Central Overland California and Pikes Peak Express Company to survey a route over the pass to Salt Lake.The route of U.S. Highway 40 currently traverses the pass north of its junction with Interstate 70 in Clear Creek Canyon. It provides primary road access to Winter Park and a secondary route to Steamboat Springs from Denver and the Colorado Front Range. However, the pass is one of the most notoriously difficult passes in Colorado for motorists, based on its height as well as the steep grades on both sides (6.3%) and the large number of switchbacks on the southern side of the pass. At least 55 avalanche paths have been mapped on Berthoud Pass, some of them intersecting U.S. Highway 40 and some of those intersecting the roadway at multiple points on the pass. In 2015, CDOT installed an automated propane-fueled avalanche mitigation system consisting of five units that create concussive blasts to mitigate snow slab buildup on avalanche path #5, Stanley.