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USGS Water-Year Summary 2024
11302000 Stanislaus River below Goodwin Dam, near Knights Ferry, CA
LOCATION - Lat 37°51'06", long 120°38'13" referenced to North American Datum of 1927, Calaveras County, CA, Hydrologic Unit 18040010, in Rancheria del Rio Estanislao Grant, on right bank, 250 ft upstream from Owl Creek, 0.9 mi downstream from Goodwin Dam, and 2.9 mi northeast of Knights Ferry.
DRAINAGE AREA - 986 mi².
REVISIONS HISTORY - WSP 1930: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1957 to current year. Records equivalent to those published as "Stanislaus River at Knights Ferry", 1903-14, and as "Stanislaus River near Knights Ferry", 1915-32, if adjusted for diversions in Stanislaus and San Joaquin Water Co.'s Canal and Oakdale and South San Joaquin Canals.
GAGE - Water-stage recorder. Datum of gage is 252.83 ft above NGVD of 1929.
COOPERATION - Records were provided by Oakdale and South San Joaquin Irrigation District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2067.
REMARKS - Flow regulated by New Melones Reservoir (station 11299000) since 1978 and Tulloch Reservoir (station 11299995) since 1957. South San Joaquin Canal (station 11300500) and Oakdale Canal (station 11301000) divert at Goodwin Dam.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 23, 1955, reached a stage of 37.7 ft, from floodmarks, discharge, 62,900 ft³/s, by computation of flow over Goodwin Dam.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 40,200 ft³/s, Dec. 24, 1964, gage height, 28.85 ft in gage well, 31.2 ft outside, from floodmarks; minimum daily, 0.12 ft³/s, Feb. 8, 1979.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years February 1966 to current year. (water years 1966-2023, daily).
INSTRUMENTATION - Water-temperature recorder since February 1966, located 2,300 ft upstream from gaging station.
REMARKS - Water temperature is affected by regulation from Goodwin Dam.
Water Year 2014: Water-temperature records excellent except for some periods which were rated good to poor. Water Year 2015: Water-temperature records excellent except for some periods which were rated good to fair. Water Year 2016: Water-temperature records excellent except for some periods which were rated good.
The practice of assigning qualitative accuracy ratings to continuous water-quality data was discontinued in water year 2017.
