Reservoir Levels Weather Hydrology

Sly Creek Reservoir is a man-made lake located in the northern Sierra Nevada mountain range of California. The history of the reservoir began in 1960 when the Feather River Hydroelectric Project was constructed. The reservoir is primarily used to generate hydroelectric power, store water for downstream agricultural and municipal use, and provide recreational opportunities such as fishing, boating, and camping. The Sly Creek watershed, which feeds the reservoir, is predominantly forested and consists of granite outcrops and meadows. The watershed is also home to several important plant and animal species, including the Pacific fisher and northern goshawk. The reservoir’s primary source of water is from snowpack, which typically begins to melt in April and peaks in May or June. The reservoir is a vital component of California’s water supply system and plays an important role in meeting the state’s water demands.

July 19, 2024







Storage 24hr Change -1.58%
Percent of Normal 102%
Minimum 9,540 acre-ft
Maximum 64,470 acre-ft
Average 45,016 acre-ft
Dam_Height 299
Hydraulic_Height 260
Drainage_Area 24
Year_Completed 1961
Nid_Storage 65650
Structural_Height 289
River_Or_Stream Lost Creek
Primary_Dam_Type Earth
Foundations Rock
Surface_Area 619
Hazard_Potential High
Dam_Length 1200
Nid_Height 299

Regional Streamflow


Cubic Feet Per Second


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