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Lake Nighthorse

Lake Nighthorse
Location Colorado
Coordinates 37°13′29.99″N 107°54′53.16″W / 37.2249972°N 107.9147667°W / 37.2249972; -107.9147667Coordinates: 37°13′29.99″N 107°54′53.16″W / 37.2249972°N 107.9147667°W / 37.2249972; -107.9147667
Type reservoir
Primary inflows Durango Pumping Plant (Animas River)
Primary outflows Basin Creek (Outflow returns to the Animas River)
Basin countries United States
Surface area 1,490 acres (600 ha)
Water volume 120,000 acre feet (150,000,000 m3)

Lake Nighthorse is a reservoir created by the 270 feet (82 m) high Ridges Basin Dam Southwest of Durango in La Plata County Colorado. As part of the Animas-La Plata Water Project, Lake Nighthorse provides water storage for tribal and water right claim-holders along the Animas River.

First authorized by the U.S. Congress on September 30, 1968 (Public Law 90-537), the Animas-La Plata Water Project, as it came to be known, experience several decades of delays due in part to political concerns, farming claims, environmental challenges, cost overruns and government funding issues. A breakthrough to the delays came with the Colorado Ute Settlement Act Amendments in December 2000 (Public Law 106-554).

The Bureau of Reclamation began construction in 2003, with the reservoir filling to capacity on June 29, 2011 at a total cost of $500 million. Lake Nighthorse is named in honor of former United States Senator Ben Nighthorse Campbell, R-Colo.

The lake is currently closed to the public. However, as of March 2015, the Bureau of Reclamation was working with the City of Durango on a recreation lease and annexation agreement, as well as a cultural resource management plan to comply with Section 106 of the National Historic Preservation Act. Additional construction at the reservoir is planned to start in the summer of 2015.


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