Arroyo Valle

Arroyo Valle
Arroyo De Los Taunamines
Arroyo del Valle in Pleasanton, California
Arroyo Valle is located in California
Arroyo Valle
Location of the mouth of Arroyo Valle in California
Location
CountryUnited States
StateCalifornia
RegionSanta Clara County
CityPleasanton, California
Physical characteristics
SourceConfluence of San Antonio Creek and Arroyo Bayo
 • coordinates37°23′08″N 121°34′21″W / 37.38556°N 121.57250°W / 37.38556; -121.57250[1]
 • elevation1,808 ft (551 m)
MouthConfluence with Arroyo de la Laguna
 • coordinates
37°39′43″N 121°54′22″W / 37.66194°N 121.90611°W / 37.66194; -121.90611[1]
 • elevation
302 ft (92 m)[1]
Basin features
Tributaries 
 • leftPino Creek, Sycamore Creek (Santa Clara County), Trout Creek (Santa Clara County)
 • rightSpring Canyon Creek, Sulphur Gulch, Colorado Creek, Dry Creek, Eylar Canyon Creek, Lang Canyon Creek
Detail
The arroyo in Pleasanton

Arroyo Valle or Arroyo Del Valle[2] is a 36.4-mile-long (58.6 km)[3] westward-flowing stream that begins in northeastern Santa Clara County, California, and flows northwesterly into Alameda County where it is dammed to form Lake Del Valle. After that Arroyo Valle is a tributary to Arroyo de la Laguna which in turn flows into Alameda Creek and thence to San Francisco Bay. In the past, the Arroyo Valle had a significant steelhead migration; however, degradation of the stream in the latter half of the 20th century has decimated this anadromous fish population.[4]

  1. ^ a b c "Arroyo Valle". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
  2. ^ U.S. Geological Survey Geographic Names Information System: Arroyo Valle
  3. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-03-29 at the Wayback Machine, accessed March 15, 2011
  4. ^ Arroyo del Valle Creekwatch Archived March 3, 2016, at the Wayback Machine