O'Neill Dam, Embankment dam in Merced County, United States.
O'Neill Dam spans 14,300 feet across San Luis Creek valley, creating a reservoir with a surface area of 2,250 acres and 14 miles of shoreline.
The United States Bureau of Reclamation constructed O'Neill Dam between 1963 and 1967 as part of the Central Valley Project San Joaquin Division San Luis Unit.
The O'Neill Forebay provides multiple recreational activities including boating, fishing, camping, and hiking facilities for residents of the west central valley.
Located 12 miles west of Los Banos on California Highway 152, the dam maintains a water capacity of 56,400 acre-feet with a maximum depth of 57 feet.
The morning-glory spillway on the left bank processes water flow at 3,250 cubic feet per second while the pumping plant generates 28 megawatts of power.
Location: Merced County
GPS coordinates: 37.08050,-121.04700
Latest update: March 13, 2025 12:16
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