Arroyo Valle Arroyo De Los Taunamines | |
---|---|
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]