Tulare Lake (Alameda County)
Tulare Lake was a large, shallow lake in eastern Amador Valley, surrounded by Willow Marsh (also known as the Lagoon). Tule rushes and willow trees once lined the marshes and sloughs of its shores. Drainage alterations starting in the 19th century have since reduced the marsh to the Arroyo de la Laguna,[2][1] and the city of Pleasanton has since expanded across what was once marshland. Such rapid developments have led to tricky seasonal flow variations in Niles Canyon.[4]
| Tulare Lake | |
|---|---|
| |
 The extent of the marshland surrounding Tulare Lake in 1878 | |
  Tulare Lake | |
| Location | Amador Valley Alameda County, California |
| Coordinates | 37°40′N 121°54′W[1] |
| Type | Marsh (drained) |
| Etymology | Once characterized by tule rush |
| Primary inflows | Arroyo Mocho Arroyo Valle Arroyo Las Positas Tassajara Creek South San Ramon Creek[2] |
| Primary outflows | Alameda Creek, via Arroyo de la Laguna |
| Catchment area | San Francisco Bay |
| Basin countries | United States |
| Settlements | Pleasanton, California Dublin, California Pelnen (Ohlone)[3] Seunen (Ohlone)[3] |
The lake was fed by Arroyos Mocho, Valle, and Las Positas (when rainfall was substantial enough for them to reach the lagoon), as well as by Tassajara Creek and other Amador Valley creeks. Its seasonal outlet was the Arroyo de la Laguna.
References
- Janet M. Sowers (2003). Creek & Watershed Map of the Pleasanton & Dublin Area (PDF) (Map). Amador Valley: Oakland Museum of California. Retrieved 25 Oct 2020.
- "Guide to San Francisco Bay Area Creeks". San Francisco Bay Area Graphic Creek & Watershed Finder. Oakland Museum of California. Retrieved 25 Oct 2020.
- "Native Peoples of the Region Now Known as the East Bay" (Map). Native Peoples of the Bay Area (PDF). East Bay Regional Parks District. p. 12. Retrieved 25 Oct 2020.
- Okamoto, Ariel Rubissow. "Alameda Work Trickles On". SF Estuary Magazine. San Francisco Estuary Partnership. Retrieved 25 Oct 2020.
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