Why does the SARI need to be relocated from its current location?
When construction of the SARI was completed in 1976, the riverbed provided a protective covering about 20 feet deep. Over the years, the riverbed has eroded to only 1 foot or less of protective covering along the upper reaches of the pipeline in Yorba Linda. During heavy rainstorms, when high volumes of river water are carried downstream, the loss of protective cover puts the pipeline in jeopardy of failure. In addition, the U.S. Army Corps of Engineers has raised the level of Prado Dam by 30 feet and has increased the discharge capacity into the Santa Ana River from 10,000 cubic feet per second to 30,000 cubic feet per second. (A cubic foot is approximately the size of the box containing a regulation-size basketball.) Increasing the discharge capacity into the Santa Ana River will add to the rate of erosion of the riverbed over the SARI, further adding to the risk of failure.
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