10256060 WHITEWATER RIVER AT WHITE WATER CUTOFF, AT WHITE WATER, CA


                       DISCHARGE MEASUREMENTS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
  Date	Time	Discharge
  (ft3/s)
  Oct. 8			1451		223
  Nov. 5			1142		4.9
  Nov. 17			0930		7.0
  Dec. 4			1100		167
  Jan. 7			1138		9.1
  Feb. 11			0740		279
  Mar. 10			0800		12
  Apr. 11			1020		267
  May 7			1300		532
  June 3			1115		524
  July 1			1048		30
  Aug. 5			0855		671
  Sept. 8			1002		31
LOCATION.-Lat 33° 55' 31", long 116° 38' 07", in NE 1/4 SE 1/4 sec.11, T.3 S., R.3 E., Riverside County, Hydrologic Unit 18100200, on center pier of White Water Cutoff (old Highway 99) bridge, 0.1 mi east of White Water, 0.75 mi downstream from Metropolitan Water District's  Colorado River Aqueduct turnout, and 2.0 mi upstream from San Gorgonio River. 
DRAINAGE AREA.-59.1 mi2. 
PERIOD OF RECORD.-October 1985 to September 1987 and October 1988 to September 1990.  Discharge measurements for the period October 1984 to September 1985 available in files of the U.S. Geological Survey.  Discharge measurements only, October 1987 to September 1988,  October 1990 to current year.  Station discontinued as continuous-record site effective September 30, 1993.
  CHEMICAL DATA:  Water years 1972-76, 1978-96.
GAGE.-None.  Elevation of station is 1,360 ft above sea level, from topographic map. 
REMARKS.-Indeterminate stage-discharge relationship.  At times, imported water is released to the Whitewater River from the Colorado River Aqueduct at a point 0.75 mi upstream.  Water is diverted out of the basin 16.5 mi upstream to powerplants in the San Gorgonio River Basin and then to an area north of Banning for irrigation.  See schematic diagram of Salton Sea Basin. 
EXTREMES FOR PERIOD OF RECORD (1986-87 AND 1989-90).-Maximum discharge, 2,020 ft3/s, Feb. 15, 1986, gage height, 11.97 ft, from rating curve extended above 900 ft3/s; no flow for many days in some years.