US Army Corps of Engineers
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Corps gives tour of Sepulveda Dam to UCLA engineering students
The tunnel underneath the Sepulveda Dam Spillway in Los Angeles extends the entire length of the spillway and part of the road leading from the spillway. Built in 1941, the purpose of Sepulveda Dam is to collect flood runoff from drainage areas upstream, store it temporarily and release it into the Los Angeles River at a rate of about 17,000 cubic feet per second.