| Arroyo Valle Arroyo De Los Taunamines | |
|---|---|
 Arroyo del Valle in Pleasanton, California | |
  Location of the mouth of Arroyo Valle in California | |
| Location | |
| Country | United States |
| State | California |
| Region | Santa Clara County |
| City | Pleasanton, California |
| Physical characteristics | |
| Source | Confluence of San Antonio Creek and Arroyo Bayo |
| • coordinates | 37°23′08″N 121°34′21″W / 37.38556°N 121.57250°W[1] |
| • elevation | 1,808 ft (551 m) |
| Mouth | Confluence with Arroyo de la Laguna |
• coordinates | 37°39′43″N 121°54′22″W / 37.66194°N 121.90611°W[1] |
• elevation | 302 ft (92 m)[1] |
| Basin features | |
| Tributaries | |
| • left | Pino Creek, Sycamore Creek (Santa Clara County), Trout Creek (Santa Clara County) |
| • right | Spring Canyon Creek, Sulphur Gulch, Colorado Creek, Dry Creek, Eylar Canyon Creek, Lang Canyon Creek |
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]
- ^ a b c "Arroyo Valle". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ U.S. Geological Survey Geographic Names Information System: Arroyo Valle
- ^ 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
- ^ Arroyo del Valle Creekwatch Archived March 3, 2016, at the Wayback Machine