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Colorado–Big Thompson Project

  • Lake Granby

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    View of Lake Granby, a reservoir created by the Colorado-Big Thompson Project, looking east. The project diverted water from the Colorado River across the Continental Divide to cities and farms on the Front Range.
    Lake Granby
  • Horsetooth Reservoir

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    Aerial view of Horsetooth Reservoir looking south. The reservoir was created as part of the Colorado-Big Thompson Project and supplies water to the city of Fort Collins.
    Horsetooth Reservoir
  • St. Vrain Supply Canal
  • C-BT Project Map

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    Map of the Colorado-Big Thompson Project, one of the largest water diversion projects in the history of the United States.
    C-BT Project Map
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Northern Water

Daniel Tyler, The Last Water Hole in the West: The Colorado–Big Thompson Project and the Northern Colorado Water Conservancy District (Niwot: University Press of Colorado, 1992).

Additional Information: 

Patricia Nelson Limerick, A Ditch in Time: The City, the West and Water (Golden, CO: Fulcrum Publishing, 2012).

George Sibley, Water Wranglers: The 75-Year History of the Colorado River District, A Story About the Embattled Colorado River and the Growth of the West. (Glenwood Springs, CO: Colorado River Water Conservation District, 2012).

Gregory M. Silkensen, Windy Gap: Transmountain Water Diversion and the Environmental Movement (Fort Collins, CO: Colorado Water Resources Research Institute, Technical Report No. 61, 1994).

Daniel Tyler, Silver Fox of the Rockies: Delphus E. Carpenter and Western Water Compacts (Norman: University of Oklahoma Press, 2003).

Daniel Tyler, W. D. Farr, Cowboy in the Boardroom (Norman: University of Oklahoma Press, 2011).