Arroyo Seco (Alameda County)

Geobox|River
name = Arroyo Seco
native_name =
other_name =
category = stream
etymology =
nickname =


image_caption =
country = United States
state = California
region = Alameda County
district =
municipality =
parent =
tributary_left =
tributary_right =
city = Livermore
landmark =
river =
source = spring
source_location = convert|8|mi|km|-1|lk=on|abbr=on east of Livermore
source_region = | source_country =
source_elevation_imperial = 1990
source_lat_d = 37 | source_lat_m = 39 | source_lat_s = 57 | source_lat_NS = N
source_long_d = 121 | source_long_m = 36 | source_long_s = 51 | source_long_EW = W
source_coordinates_note =gnis|218407|Arroyo Seco]
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mouth = Arroyo Las Positas
mouth_location = north of Livermore
mouth_region = | mouth_country =
mouth_elevation_imperial = 482
mouth_elevation_note =
mouth_lat_d = 37 | mouth_lat_m = 42 | mouth_lat_s = 20 | mouth_lat_NS = N
mouth_long_d = 121 | mouth_long_m = 45 | mouth_long_s = 23 | mouth_long_EW = W
mouth_coordinates_note =
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Arroyo Seco is a watercourse in Alameda County, California which 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 Lawrence Livermore 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. [ [http://www.llnl.gov/es_and_h/hsm/doc_33.02/doc33-02.html#1.0 Lawrence Livermore National Laboratory Environmental Features] ]

ee also

*Mocho Subbasin

References