San Gabriel Dam, Rock-fill dam in Los Angeles County, California.
The San Gabriel Dam stretches 1,520 feet across the San Gabriel River, creating a reservoir that extends three miles when filled to capacity.
Construction of the dam began in 1932 and concluded in 1939, replacing initial plans for a larger concrete arch structure due to stability concerns.
The dam stands within Angeles National Forest, marking a transformation point where the San Gabriel River shifts from mountain wilderness to urban water management.
The structure maintains a storage capacity of 44,183 acre-feet of water and generates hydroelectric power through two plants with 4.95 MW output.
Regular sediment removal operations occur at the reservoir to maintain water storage capacity following environmental events such as wildfires.
Location: Los Angeles County
GPS coordinates: 34.20560,-117.85900
Latest update: March 13, 2025 11:36
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RailGiants Train Museum
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