For other uses see Aliso Creek (disambiguation)

Aliso Creek (disambiguation)

Aliso Creek is the name of several places in the United States:Rivers in California*Aliso Creek **Aliso Canyon*Aliso Creek , also called Aliso Canyon Wash...

.

Aliso Creek (also Aliso Canyon Wash or Aliso Wash) is a major tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Los Angeles River

Los Angeles River

The Los Angeles River is a river that starts in the San Fernando Valley, in the Simi Hills and Santa Susana Mountains, and flows through Los Angeles County, California, from Canoga Park in the western end of the San Fernando Valley, nearly southeast to its mouth in Long Beach...

 in Los Angeles County, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, with a watershed of 21 mi2. It is the second major tributary to enter the Los Angeles River downstream of the Bell Creek/Calabasas Creek merge. The stream runs about 10 miles (16.1 km) from Aliso Canyon below Oat Mountain to its confluence with the Los Angeles River. During its first mile, it is a free-flowing stream mostly contained within Aliso Canyon Park and Eddlestone Park. After it passes under State Route 118 (Ronald Reagan Freeway) it empties into a retention basin

Retention basin

A retention basin is used to manage stormwater runoff to prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay. Sometimes called a wet pond or wet detention basin, it is an artificial lake with vegetation around the perimeter, and includes a...

 and from there on is encased in a concrete

Concrete

Concrete is a composite construction material, composed of cement and other cementitious materials such as fly ash and slag cement, aggregate , water and chemical admixtures.The word concrete comes from the Latin word...

 flood control channel

Flood control channel

Flood control channels are a series of large and empty open-air channels that extend a ways below the street levels of some larger cities, so that if and when a flood occurs, the flood will run into the channels, and proceed to be drained to the proper body of water...

, flowing due south. Upstream of Plummer St., it merges with the Wilbur Canyon Wash, and shortly downstream merges with Limekiln Wash, both on the right bank. West of the West Valley Park, Aliso Creek makes a 90-degree bend to the east and merges with the mainstem Los Angeles River

Los Angeles River

The Los Angeles River is a river that starts in the San Fernando Valley, in the Simi Hills and Santa Susana Mountains, and flows through Los Angeles County, California, from Canoga Park in the western end of the San Fernando Valley, nearly southeast to its mouth in Long Beach...

.

Crossings and tributaries

From northern source to southern mouth (year built in parentheses):

• Rinaldi Street
• California State Route 118
  California State Route 118
  State Route 118 is a state highway in the U.S. state of California that begins running west to east through Ventura and Los Angeles counties in southern California. It travels from Saticoy in Ventura County east to Lake View Terrace in Los Angeles...
  
   - Ronald Reagan Freeway (1980)
• Concrete flood channel opening
• San Fernando Mission Road
• Tribune Street
• Chatsworth Street
• Service bridges
• Devonshire Street
• Lemarsh Street
• Reseda Boulevard (1950)
• Lassen Street (1966)
• Yolanda Avenue (1963)
• Limekiln Canyon Wash enters
• Wilbur Avenue (1969)
• Plummer Street (1967)

• Nordhoff Street (1969)
• Wilbur Canyon Wash enters
• Railroad: Union Pacific Coast Line
  Coast Line (UP)
  The Coast Line is a railroad line from Burbank, California north to the San Francisco Bay Area, roughly along the Pacific Coast.The first version of the Coast line, via Saugus and Santa Paula, was completed by the Southern Pacific Railroad on December 31, 1900; the line via Santa Susana opened in...
  
  
• Parthenia Street (1955)
• Chase Street [Pedestrian Bridge]
• Roscoe Boulevard (1955)
• Wilbur Avenue (1955)
• Strathern Street (1952)
• Arminta Street [Pedestrian Bridge]
• Saticoy Street (1954)
• Valerio Street [Pedestrian Bridge]
• Sherman Way (1954)
• Hart Street [Pedestrian Bridge]
• Vanowen Street (1954)
• Merges with the Los Angeles River
  Los Angeles River
  The Los Angeles River is a river that starts in the San Fernando Valley, in the Simi Hills and Santa Susana Mountains, and flows through Los Angeles County, California, from Canoga Park in the western end of the San Fernando Valley, nearly southeast to its mouth in Long Beach...