Contents 1 About 2 Crossings 3 See also 4 References

About[edit] Tujunga Wash consists of two forks, both beginning in the San Gabriel Mountains. The upper portion of Big Tujunga Wash is called Tujunga Creek, or Big Tujunga Creek. It travels roughly east to west, and several tributaries from the north and south join it as it flows to Big Tujunga Reservoir, formed by Big Tujunga Dam. Below the dam, the stream is called Big Tujunga Wash. It continues its westward flow, enters San Fernando Valley and is met by Little Tujunga Wash a mile before reaching Hansen Reservoir, which is formed by Hansen Dam. Little Tujunga Wash comes from the north, draining the portion of the San Gabriel Mountains immediately north of Hansen Reservoir. Downstream of the dam, Tujunga Wash flows roughly south and is met halfway to its confluence with the Los Angeles River by Pacoima Wash, which drains the other side of the mountains that Little Tujunga Wash drains. Finally, Tujunga Wash meets the Los Angeles River near Studio City, California. Flooding damage along the wash in 1938 Big Tujunga Dam was built by Los Angeles County and completed in 1931. Big Tujunga Reservoir can hold 5,960 acre feet (7,350,000 m3) of water. In the Los Angeles Flood of 1938 it was tested. The dam is currently[when?] undergoing a seismic retrofit, which includes doubling the thickness of the gravity arch dam. Hansen Dam was built by the United States Army Corps of Engineers and completed in 1940. Hansen Reservoir can hold 74,100 acre feet (91,400,000 m3) of water. Their primary purposes are flood control, although they also provide some groundwater recharge. Water cannot percolate in the lower portion of the watershed because it is so urbanized that there is little bare ground and streambeds have been transformed into concrete channels, and the water flows too fast in the upper reaches of the watershed to sink into the ground very much. As a result, the majority of the water is discharged into the ocean. In 1969 there was a flood in the Tujunga Wash: water flowed down a formerly inactive channel and entered a large gravel pit 15 m to 23 m deep. The channel bed degraded by about 4 meters, leading to failure of three highway bridges and loss of seven homes.[2]

Crossings[edit] From north to south (year built in parentheses): Hansen Dam Service bridge Glenoaks Boulevard (1953) Railroad San Fernando Road (1935) Laurel Canyon Boulevard (1952) Interstate 5 & California 170 (1963) Arleta Avenue (1968) Roscoe Boulevard (1956) Cantara Street (1952) Saticoy Street (1952) Railroad: Union Pacific Coast Line Sherman Way (1952) Vanowen Street & Fulton Avenue (1951) Ethel Avenue Victory Boulevard (1952) Oxnard Street (1952) Burbank Boulevard & Coldwater Canyon Avenue (1951) Chandler Boulevard North (1951) Metro Orange Line Chandler Boulevard South (1957) Magnolia Boulevard (1950) Riverside Drive & Whitsett Avenue (1950) U.S. Route 101 - Ventura Freeway (1959) Laurel Canyon Boulevard (1950) Moorpark Street (1951) Merges with Los Angeles River

See also[edit] Great Wall of Los Angeles

References[edit] ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed March 16, 2011 ^ Bull, W. B. and K. M. Scott (1974). "Impact of mining gravel from urban stream beds in the Southwestern United States." Geology 2: 171-174. Retrieved from "" Categories: Rivers of Los Angeles County, CaliforniaTributaries of the Los Angeles RiverGeography of the San Fernando ValleyWashes of CaliforniaSan Gabriel MountainsStudio City, Los AngelesSun Valley, Los AngelesVan Nuys, Los AngelesRivers of Southern CaliforniaHidden categories: Articles needing additional references from March 2011All articles needing additional referencesAll articles with vague or ambiguous timeVague or ambiguous time from February 2011Los Angeles County, California articles missing geocoordinate dataAll articles needing coordinates

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Wikipedia:Identifying Reliable SourcesTalk:Tujunga WashWikipedia:Citing SourcesEnlargeStreamLos Angeles County, CaliforniaLos Angeles RiverSan Gabriel MountainsBig Tujunga CreekBig Tujunga DamSan Fernando ValleyHansen DamLos Angeles RiverPacoima WashLos Angeles RiverStudio City, CaliforniaEnlargeLos Angeles Flood Of 1938Wikipedia:Manual Of Style/Dates And NumbersSeismic RetrofitUnited States Army Corps Of EngineersFlood ControlGroundwaterConcreteHansen DamSan Fernando RoadLaurel Canyon BoulevardInterstate 5 In CaliforniaCalifornia State Route 170Union PacificCoast Line (UP)Victory Boulevard (Los Angeles)Orange Line (Los Angeles Metro)Riverside Drive (Los Angeles, California)U.S. Route 101 In CaliforniaLaurel Canyon BoulevardLos Angeles RiverGreat Wall Of Los AngelesHelp:CategoryCategory:Rivers Of Los Angeles County, CaliforniaCategory:Tributaries Of The Los Angeles RiverCategory:Geography Of The San Fernando ValleyCategory:Washes Of CaliforniaCategory:San Gabriel MountainsCategory:Studio City, Los AngelesCategory:Sun Valley, Los AngelesCategory:Van Nuys, Los AngelesCategory:Rivers Of Southern CaliforniaCategory:Articles Needing Additional References From March 2011Category:All Articles Needing Additional ReferencesCategory:All Articles With Vague Or Ambiguous TimeCategory:Vague Or Ambiguous Time From February 2011Category:Los Angeles County, California Articles Missing Geocoordinate DataCategory:All Articles Needing CoordinatesDiscussion About Edits From This IP Address [n]A List Of Edits Made From This IP Address [y]View The Content Page [c]Discussion About The Content Page [t]Edit This Page [e]Visit The Main Page [z]Guides To Browsing WikipediaFeatured Content – The Best Of WikipediaFind Background Information On Current EventsLoad A Random Article [x]Guidance On How To Use And Edit WikipediaFind Out About WikipediaAbout The Project, What You Can Do, Where To Find ThingsA List Of Recent Changes In The Wiki [r]List Of All English Wikipedia Pages Containing Links To This Page [j]Recent Changes In Pages Linked From This Page [k]Upload Files [u]A List Of All Special Pages [q]Wikipedia:AboutWikipedia:General Disclaimer

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