Santa Ana River
The Santa Ana River begins in
San Bernardino County, California, in the San Bernardino National Forest. Its highest source lakes are Dollar Lake (9,220') and Dry Lake (9,065'), both on the northern flank of San Gorgonio Mountain(11,499') in the San Gorgonio Wilderness. Its watershed areas above an elevation of 8,500', which occupy a substantial portion of the watershed, receive the majority of precipitation in the form of snow. After traveling nearly 100 miles through San Bernardino, Riverside, and Orange Counties, it eventually reaches its terminus between Newport Beach and Huntington Beach where it spills into the Pacific Ocean. Despite much of the river being channelized in recent times, it still represents one of the largest river systems in Southern California. [citation | last=Water Resources Institute | first=California State University, San Bernardino | authorlink=California State University, San Bernardino | publisher=Redlands Institute, University of Redlands| title=The Santa Ana River and Watershed Bibliography | url= http://wri.csusb.edu/web-pages/archives/saw-biblio/draftFinalSantaAnaRiverWatershedBibliography.pdf | date=2004 | location=Redlands | accessdate=2007-12-17]
Due to Southern California's dry climate, dam control, and confiscation by local water agencies, very little water flows throughout the year. However, the Santa Ana River is prone to flooding in wet seasons. The
Army Corps of Engineersconsiders it to be the greatest flood hazard west of the Mississippi River. It produced devastating floods in 1862, 1938, and 1969.
The 1938 flood was caused by heavy rains in the area that started on February 27, 1938. The river spilled over its banks on March 3, sweeping away cars, homes, and bridges, including Pacific Coast Highway. A total of 2000 people were left homeless and 19 people perished [cite book | last = Hallan-Gibson | first = Pamela. | title = Orange County - The Golden Promise | publisher = American Heritage Press | date = 2002 | pages = pp. 212 ] . As a result of this flood, the
Prado Damwas built near Corona in 1941. Officials in Orange County felt further protection was needed. The Seven Oaks Damwas completed in 1999, located a few miles north of Redlands.
2005, Southern California experienced one of its wettest periods in recent history, which placed unusual stress on the Santa Ana River system. Prado Dam, which was under construction for expansion at the time, seeped water, and residents of the local communities of Corona and Yorba Lindawere evacuated as a precaution. The dam was damaged, but there was no major flooding as a result, and evacuated people were soon allowed to return.
bicycle trailruns along the river some 30 miles, from Prado Dam near Corona to the Pacific Ocean. Other partial trails exist along the river. In Riverside County, a 4.5 mile recreational path runs through the Hidden Valley Wildlife Area.
The Santa Ana River at the River Road bridge at the Eastvale/Norco border in
Riverside County, Californialooking upstream.
The Santa Ana River mouth.
A recreational path along the Santa Ana River near the mouth looking upstream.
Mill Creek from Santa Ana River Trail.
San Bernardino National Forest..
List of California rivers
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