page_title: O'Neill Dam
hierarchical_section_title: O'Neill Dam
caption_attribution_description: English: O'Neill Dam on San Luis Creek, creating the O'Neill Forebay for San Luis Dam and San Luis Reservoir — in western Merced County, California. A part of the California State Water Project system infrastructure.
context_page_description: O'Neill Dam is an earthfill dam on San Luis Creek, 12 miles west of Los Banos, California, United States, on the eastern slopes of the Pacific Coast Ranges of Merced County. Forming the O'Neill Forebay, a forebay to the San Luis Reservoir, it is roughly 2.5 miles downstream from the San Luis Dam.
context_section_description: O'Neill Dam is an earthfill dam on San Luis Creek, 12 miles (19 km) west of Los Banos, California, United States, on the eastern slopes of the Pacific Coast Ranges of Merced County. Forming the O'Neill Forebay, a forebay to the San Luis Reservoir, it is roughly 2.5 miles (4.0 km) downstream from the San Luis Dam.
caption: O'Neill Forebay and Dam as seen from left bank.
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