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Water-Year Summary for Site 09419800

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Available Parameters
00060 Discharge(Mean)  

Water year 2017: 2017-10-01 to 2018-09-30
 

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USGS Water-Year Summary 2017
09419800 Las Vegas Wash Below Lake Las Vegas Near Boulder City, NV
LOCATION - Lat 36°07'20", long 114°54'15" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.14, T.21 S., R.63 E., Clark County, NV, Hydrologic Unit 15010015, in Lake Mead Recreation Area, on right bank, under bridge at North Shore Road, and 11.0 mi northeast of Boulder City.
DRAINAGE AREA - 2,193 mi² of which 607 mi² probably is noncontributing.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Aug. 1969 to Sep. 1984, Jul. 2002 to current year.
GAGE - Water-stage recorder. Elevation of gage is 1,280 ft above National Geodetic Vertical Datum of 1929, from topographic map.
REMARKS - 10/01/2015-09/30/2016:Records good except for daily discharges greater than 600 ft³/s which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge, 10,800 ft³/s, Jul. 8, 1999, from slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,760 ft³/s, Aug. 14, 1984, gage height, 11.32 ft, from slope-area measurement of peak flow; minimum daily, 17 ft³/s, Jul. 8, 30, 1971.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Jan. 1964 to Jan. 1965, Sep. 1966 to Feb. 1986, Nov. 2001 to Aug. 2002, May to Sep. 2004.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Jun. 1975 to Mar. 1976, Nov. 1976 to Apr. 1978, and Aug. 1979 to Feb. 1986. WATER TEMPERATURE:Nov. 1979 to February 1986.
REMARKS - Discharge includes sewage effluent and wastewater from industrial plants. City and county sewage plants implemented chemical removal of phosphorus from effluent during water year 1981.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum daily, 6,140 microsiemens/cm Feb. 7, 1976; minimum daily, 1,390 microsiemens/cm Jul. 7, 1985. WATER TEMPERATURE: Maximum, 30.5°C Jul. 11, 12, 1985; minimum, 7.5°C February 8, 1982, Jan. 19, 21, 1984.