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Colorado–Big Thompson Project

The Colorado–Big Thompson Project (C–BT) is the largest transmountain water diversion in the state of Colorado. Built between 1938 and 1956, the C–BT Project provides supplemental water for municipal, industrial, and irrigation purposes in…

Horsetooth Reservoir

Horsetooth Reservoir is located in the foothills just west of Fort Collins. The Bureau of Reclamation began construction of the reservoir in 1946 as part of the larger Colorado–Big Thompson Project, which provided additional irrigation water for the…