Aliso Creek (Los Angeles County) Explained

Aliso Canyon Wash
Name Other:Aliso Creek
Pushpin Map:USA California
Pushpin Map Caption:Location of the mouth in California
Subdivision Type1:Country
Subdivision Name1:United States
Subdivision Type2:State
Subdivision Name2:California
Subdivision Type3:Region
Subdivision Name3:Los Angeles County
Subdivision Type5:Cities
Subdivision Name5:Granada Hills, Northridge, Winnetka, Reseda
Length:8.5miles, North-south
Discharge1 Avg:3cuft/s
Source1:Aliso Canyon Park
Source1 Location:Near Mission Point, Santa Susana Mountains
Source1 Coordinates:34.3231°N -118.5458°W
Source1 Elevation:2600feet
Mouth:Los Angeles River
Mouth Location:Reseda
Mouth Coordinates:34.19°N -118.5417°W
Mouth Elevation:725feet
River System:Los Angeles River
Basin Size:21sqmi
Tributaries Right:Wilbur Canyon Wash, Limekiln Wash

Aliso Creek (also Aliso Canyon Wash or Aliso Wash) is a major tributary of the Upper Los Angeles River in the Santa Susana Mountains in Los Angeles County and western San Fernando Valley in the City of Los Angeles, California.

It has a watershed of 21mi2.[1] It is the second major tributary, after Browns Canyon Wash−Creek, to enter the Los Angeles River downstream of its headwaters at the confluence of Bell Creek and Arroyo Calabasas in Canoga Park.[2]

Course

The stream runs about 10miles from Aliso Canyon below Oat Mountain in the Santa Susana Mountains to its confluence with the Los Angeles River.

During its first 1miles, it is a free-flowing stream mostly contained within Aliso Canyon Park and Eddlestone Park on the border of Granada Hills and Porter Ranch. After it passes under State Route 118 (Simi Valley Freeway) and enters Northridge, it empties into a retention basin and from there on is encased in a concrete flood control channel flowing southward across the San Fernando Valley. Upstream of Plummer Street Wilbur Canyon Wash enters it, and shortly after that downstream Limekiln Wash enters it, both on the right bank.

In Reseda the Aliso Creek channel makes a 90-degree bend to the east, south of Vanowen Avenue and west of West Valley Park, flowing a short distance to its confluence with the Los Angeles River, north of Victory Boulevard between Wilbur Avenue and Reseda Boulevard.[3]

Crossings and tributaries

From the northern Santa Susana Mountains source to the southern mouth (year built in parentheses):

See also

Notes and References

  1. http://www.ladpw.org/wmd/npdes/2002-03_report/Section%20Two%20Site%20Descriptions.pdf Section 2: Site Descriptions
  2. http://seriss.com/people/erco/fovicks/ Friends Of Vast Industrial Concrete Kafkaesque Structures
  3. https://maps.google.com/ Google Maps
  4. Web site: Council File No. 07-2474 - Status of Bridges and Tunnels in the City of Los Angeles . City of Los Angeles . October 2, 2007.