West Fork San Gabriel River

West Fork San Gabriel River
Country United States
State California
Source Red Box Gap
 - location Angeles National Forest
 - elevation 4,530 ft (1,381 m)
 - coordinates 34°15′29″N 118°06′13″W / 34.25806°N 118.10361°W / 34.25806; -118.10361 [1]
Mouth San Gabriel River
 - location San Gabriel Reservoir
 - elevation 1,473 ft (449 m)
 - coordinates 34°14′23″N 117°51′24″W / 34.23972°N 117.85667°W / 34.23972; -117.85667Coordinates: 34°14′23″N 117°51′24″W / 34.23972°N 117.85667°W / 34.23972; -117.85667 [1]
Length 19 mi (31 km) [1]
Basin 104 sq mi (269 km2) [2]
Discharge for Camp Rincon, near the mouth
 - average 71 cu ft/s (2 m3/s) [2]
 - max 34,000 cu ft/s (963 m3/s)
 - min 1.7 cu ft/s (0 m3/s)
Location of the West Fork in California

The West Fork is one of two major streams, the other being the East Fork, that combine to form the San Gabriel River in Los Angeles County, California. The West Fork flows for 19 miles (31 km)[1] in an easterly direction from its origins at Red Box Gap, in the San Gabriel Mountains, eventually reaching San Gabriel Reservoir where it is bridged by SR 39 just above its mouth.

The major tributaries of the West Fork, from upstream to downstream, are Devil Creek, Bear Creek and the North Fork San Gabriel River. A large portion of the watershed is situated in the San Gabriel Wilderness, whose southern boundary is formed by the West Fork. Cogswell Dam impounds the river to create the 10,785-acre-foot (13,303,000 m3) Cogswell Reservoir, whose primary function is flood and silt control for the San Gabriel Valley.[3]

See also

References

  1. 1 2 3 4 "West Fork San Gabriel River". Geographic Names Information System. United States Geological Survey. 1981-01-19. Retrieved 2016-12-05.
  2. 1 2 "USGS Gage #11082000 on the West Fork San Gabriel River at Camp Rincon, CA". National Water Information System. U.S. Geological Survey. 1927–1978. Retrieved 2016-12-05.
  3. ↑ "Alternatives Analysis & Recommendations for Reservoirs along the San Gabriel River" (PDF). Los Angeles Department of Public Works. 2013–03. Retrieved 2016-12-05. Check date values in: |date= (help)
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