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USGS 09415000 VIRGIN R AT LITTLEFIELD, AZ

 

PROVISIONAL DATA SUBJECT TO REVISION
 
 
  STATION.--09415000 VIRGIN RIVER AT LITTLEFIELD, AZ
LOCATION.--Lat 36°53'30", long 113°55'25", in SW 1/4 SW 1/4 sec.4, T.40 N., R.15 W., Mohave County, Hydrologic Unit 15010010, on right bank, 0.5 mi downstream from Beaver Dam Wash, 0.4 mi upstream from Littlefield, and 36 mi upstream from Lake Mead.
DRAINAGE AREA.--5,090 mi2, approximately.
PERIOD OF RECORD.--October 1929 to current year.
REVISED RECORDS.--WSP 959: 1932. WSP 979: 1930-31, 1933-37. WSP 1313: 1940 (M).
GAGE.--Water-stage recorder. Datum of gage is 1,763.69 ft above NGVD of 1929. Prior to May 28, 1933, nonrecording gage at site 300 ft upstream, and May 28, 1933, to November 7, 1939, at same site, both at datum 2.53 ft higher. November 8, 1939, to March 31, 1942, nonrecording gage at same site at datum 2.00 ft higher. April 1, 1942, to September 30, 1970, water-stage recorder at same site at same datum. October 1, 1970, to August 7, 1979, at site 300 ft upstream at same datum.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge: 61,000 ft3/s, January 1, 1989, gage height, 22.37 ft, due to failure of Quail Creek Dam; maximum discharge excluding 1989: 35,200 ft3/s, December 6, 1966, gage height 15.66 ft, for site then in use, from rating curve extended above 1,500 ft3/s on basis of slope-area measurement of peak flow; minimum daily, 40 ft3/s, August 6, 1966.
FLOOD STAGE.--NOAA, National Weather Service river forecast station flood stage is 14.0 ft, accessed on June 6, 2003, at URL http://www.cbrfc.noaa.gov/river/station/flowplot/flowplot.cgi?VLTA3
 
 

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Discharge, cubic feet per second
Most recent value: 200   11-19-2004  14:45
Graph of Discharge, cubic feet per second
Download a presentation-quality graph Parameter Code 00060; DD 01
Daily mean flow statistics for 11/19 based on 74 years of record in ft3/sec
Current Flow Minimum Mean Maximum 80 percent exceedance 50 percent exceedance 20 percent exceedance
200  74 187 501 129 174 230

Percent exceedance means that 80, 50, or 20 percent of all daily mean flows for 11/19 have been greater than the value shown.

Gage height, feet
Most recent value: 4.92   11-19-2004  14:45
Graph of Gage height, feet
Download a presentation-quality graph Parameter Code 00065; DD 02
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Retrieved on 2004-11-19 18:23:57 EST
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