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Arroyo Seco (Alameda County)
Arroyo Seco is an 〔U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. (The National Map ), accessed March 15, 2011〕 watercourse in Alameda County, California, that traverses through the city of Livermore. ''Arroyo Seco'' means "dry stream" in Spanish. Arroyo Seco lies above the Arroyo Seco watershed, which includes the eastern part of the city of Livermore and also the Sandia National Laboratory. The Mocho Subbasin is the largest of the subbasins in the Livermore Valley watershed. This subbasin is bounded to the west by the Livermore Fault Zone and to the east by the Tesla Fault. Some groundwater flow occurs across these fault boundaries, but flows are discontinuous below a depth of fifty feet across the Tesla Fault and south of the Arroyo Mocho channel across the Livermore Fault.〔''Environmental Screening Analysis, 2127 Railroad Avenue, Livermore, California'', Earth Metrics rpt no. 7785, San Mateo, Ca., Feb., 1989〕 A number of threatened and endangered species occur in this watershed.〔(Lawrence Livermore National Laboratory Environmental Features )〕
==See also==
*Mocho Subbasin
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