The San Gabriel Valley Municipal Water District delivery system is the Devil Canyon-Azusa pipeline, which was constructed in 1972 to deliver water from the State Water Project to the Main San Gabriel Basin. The pipeline (highlighted in red on the map below) is about 38 miles long and runs west from the Devil Canyon Power Plant in the San Bernardino Mountains to the San Gabriel Canyon Spreading Grounds in Azusa.
The pipeline is gravity fed and has three pressure reducing stations in Glendora, La Verne, and Fontana to control the speed of water. The diameter of the pipeline ranges from 30 inches to more than 4 feet around, starting at Devil Canyon. The pipeline’s capacity is 55cfs (cubic feet per second) which is the equivalent of 27,450 gallons per minute. In the map below, the red line represents the approximate route of the pipeline.
The system allows the District to provide reliable supplemental water for the communities of Alhambra, Azusa, Monterey Park, and Sierra Madre.
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