Dillon Reservoir

Reservoir Levels Weather Hydrology

Dillon Reservoir is a man-made lake located in Summit County, Colorado. It was created in the 1960s to provide water for the growing population of Denver. The reservoir has a capacity of 257,304 acre-feet and is fed by the Blue River and several mountain streams. The hydrology of the reservoir is closely tied to the snowpack in the surrounding mountains, which provides the majority of the surface flow during the spring and summer months. The reservoir is also used for irrigation and provides water to several agricultural communities in the area. In addition, Dillon Reservoir is a popular destination for recreational activities such as boating, fishing, and hiking. It is surrounded by several parks and trails and offers stunning views of the Rocky Mountains.

June 13, 2024







Storage 24hr Change 0.6%
Percent of Normal 100%
Minimum 120,377 acre-ft
Maximum 264,121.156 acre-ft
Average 244,084 acre-ft
Dam_Height 231
Hydraulic_Height 231
Drainage_Area 338
Years_Modified 1986 - Hydraulic, 1986 - Mechanical, 2002 - Hydraulic, 2002 - Mechanical
Year_Completed 1963
Nid_Storage 305000
Structural_Height 310
Foundations Rock, Soil
Surface_Area 3300
Outlet_Gates Slide (sluice gate) - 4, Valve - 5
River_Or_Stream BLUE RIVER
Dam_Length 5900
Hazard_Potential High
Primary_Dam_Type Earth
Nid_Height 310

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