USGS Water-Year Summary 2021
11062000 Lytle Creek near Fontana, CA
LOCATION - Lat 34°12'44", long 117°27'26" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.36, T.2 N., R.6 W., San Bernardino County, CA, Hydrologic Unit 18070203, on right bank, 25 ft upstream from highway culvert crossing, 0.7 mi upstream from right tributary, 2.3 mi downstream from Lytle Creek Conduit, and 8 mi north of Fontana.
DRAINAGE AREA - 46.6 mi².
- WSP 1011: 1943. WDR CA-83-1: Drainage area. WDR CA-98-1: 1969 (instantaneous maximum discharge).
PERIOD OF RECORD - October 1918 to current year. Combined records of Lytle Creek and diversions, October 1898 to December 1899, October 1904 to current year (published as "at mouth of canyon near Rialto" 1898-99, as "near San Bernardino" 1904-18, and as "Lytle Creek and Fontana pipeline near Fontana" 1919-31). Monthly discharge only for some periods published in WSP 1315-B.
GAGE - Water-stage recorder and crest-stage gage on creek. Elevation of gage is 2,380 ft above NGVD of 1929, from topographic map. October 1918 to Mar. 21, 1938, at site 1 mi downstream at different datum. Mar. 22, 1938, to Nov. 20, 1963, at site 75 ft downstream at datum 4.58 ft lower. Water-stage recorder and sharp-crested weir on conduit since June 3, 1949. Water-stage recorder and sharp-crested weir on infiltration line from Oct. 1, 1971, to Sept. 30, 1992; nonrecording flow meter on diversion pipe since Oct. 1, 1992.
COOPERATION - Records for Lytle Creek Conduit were provided by Southern California Edison Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 1932. Records for Fontana Water Co.'s infiltration line were provided by Fontana Water Co.
EXTREMES FOR PERIOD OF RECORD - Creek only: Maximum discharge, 25,200 ft³/s, Mar. 2, 1938, gage height unknown, on basis of slope-area measurement of peak flow; maximum gage height, 15.0 ft, Jan. 25, 1969; no flow at times most years.
Combined creek and diversions: Maximum discharge, 25,200 ft³/s, Mar. 2, 1938; minimum daily, 2.4 ft³/s, Feb. 2, 7, 2003.