USGS Water-Year Summary for Site 11179000

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.,Med.)
	00060 Discharge(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)
	80225 Bedload sediment(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11179000 Alameda Creek near Niles, CA

LOCATION - Lat 37°35'14", long 121°57'35" referenced to North American Datum of 1927, in NW 1/4 sec.15, T.4 S., R.1 W., Alameda County, CA, Hydrologic Unit 18050004, Mt. Diablo meridian, on right bank, 0.3 mi downstream from railroad bridge, 1.2 mi northeast of Niles, and 8.3 mi downstream from James H. Turner Dam on San Antonio Creek.

DRAINAGE AREA - 633 mi².

REVISIONS HISTORY - WSP 1315-B: 1921. WSP 1515: 1951-52, 1956. WSP 1565: 1945. WDR CA-86-2: 1984 (instantaneous maximum discharge).

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 1891 to current year. Monthly discharge only for some periods, published in WSP 1315-B. Published as "at Niles Dam" 1891-1900 and as "at Sunolglen" 1901-21.

GAGE - Water-stage recorder and concrete control. Datum of gage is 86.32 ft above NAVD of 1988. Prior to 1901, nonrecording gage at site 1 mi upstream at different datum. From 1901 to Sept. 30, 1914, nonrecording gage; Oct. 1, 1914, to Sept. 30, 1916, water-stage recorder at site 4.5 mi upstream at different datum; Oct. 1, 1916, to Dec. 17, 1923, water-stage recorder at site 800 ft upstream at different datum.

REMARKS - Flow regulated since 1916 by Calaveras Reservoir, although dam not completed until 1925, usable capacity, 96,800 acre-ft, most of which is diverted for San Francisco water supply; since February 1965 by San Antonio Reservoir, capacity, 51,000 acre-ft; and since September 1968 by Del Valle Reservoir, 23 mi upstream, capacity, 77,100 acre-ft. Natural flow of stream affected by water imported from Delta-Mendota Canal beginning in 1962. Other diversions from ground-water basin for irrigation of 9,000 acres upstream from station. See schematic diagram of Alameda Creek Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 29,000 ft³/s, Dec. 23, 1955, gage height, 14.9 ft; minimum (water years 1892-1962), no flow at times; minimum daily (water years 1963 to current year), 0.63 ft³/s, Oct. 7-10, 1984.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years January to November 1906, 1952-53 (partial record station), 1954-1967, October 1968 to August 1969, 1975-79.
SEDIMENT DATA: Water years 1957-73, 2000 to current year (storm season only).

CONTINUOUS WATER-QUALITY DATA:
SPECIFIC CONDUCTANCE: Water years July 1956 to July 1957, August 1959 to September 1962, October 1975 to September 1993.
WATER TEMPERATURE: Water years July 1956 to September 1973, October 1975 to September 1978, October 2007 to current year.
SUSPENDED-SEDIMENT DISCHARGE: Water years October 1959 to September 1973, October 1999 to current year (storm season only).

INSTRUMENTATION - Water-quality monitor on right bank since October 2008. Electronic data logger with 15 minute interval.

REMARKS - Interruptions in record are due to malfunction of recording and (or) sensing equipment. Zero bedload discharge observed for flows less than 210 ft³/s.