USGS Water-Year Summary 2019
11278000 Eleanor Creek near Hetch Hetchy, CA
LOCATION - Lat 37°58'09", long 119°52'52" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.03, T.1 N., R.19 E., Tuolumne County, CA, Hydrologic Unit 18040009, Yosemite National Park, on right bank, 0.5 mile downstream from Lake Eleanor Dam, 1.1 miles upstream from Miguel Creek, 5.5 miles northwest of Hetch Hetchy, and 6.2 miles northwest of Mather.
DRAINAGE AREA - 78.4 mi².
- WSP 1315-A: 1923 (instantaneous maximum discharge). WSP 1930: Drainage area. WDR-US-2006: 2005 (instantaneous maximum discharge).
PERIOD OF RECORD - October 1909 to current year. Monthly discharge only for some periods, published in WSP 1315-A. Published as "near Sequoia" 1910-18.
GAGE - Water-stage recorder. Elevation of gage is 4,500 ft above NGVD of 1929, from topographic map. November 1909 to November 1915, nonrecording gage and water-stage recorder at site 1 mi upstream at different datum. Prior to Jan. 2, 1997, datum of gage 10 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 19,500 ft³/s, Jan. 2, 1997, gage height, 26.74 ft, from rating curve extended above 2,600 ft³/s, on basis of slope-area measurements at gage heights 9.94 and 12.24 ft, datum then in use; no flow at times in 1910, 1930-31, 1933, 1956.
PERIOD OF DAILY RECORD - April 2006 to current year.
WATER TEMPERATURE: April 2006 to current year.
INSTRUMENTATION - Water-temperature recorder since Apr. 26, 2006.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum recorded, 24.7°C, Aug. 20, 2012; minimum recorded, 1.1°C, Feb. 3, 2008.