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Water-Year Summary for Site 07018500

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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
07018500 BIG RIVER AT BYRNESVILLE, MO
LOCATION - Lat 38°23'30.2", long 90°38'16.1" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 SE 1/4 sec.12, T.42 N., R.3 E., Jefferson County, MO, Hydrologic Unit 07140104, on right bank 200 ft below dam on downstream side of pier of privately owned bridge at Byrnesville, 4.0 mi upstream from Heads Creek, and at mile 14.1.
DRAINAGE AREA - 917 mi².
REVISIONS HISTORY - WSP 667: 1927. WSP 877: 1938. WSP 1007: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Oct 1921 to current year. Prior to Jun 1922 monthly discharge only, published WSP 1311.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 433.70 ft above North American Vertical Datum of 1988. Prior to Mar 9, 1940, nonrecording gage at present site and datum.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS MO Water Science Center.  
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Aug 21, 1915, reached a stage of 30.2 ft from floodmarks, discharge, 80,000 ft³/s, by slope-area measurement of peak flow.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: Oct 2011 to Sep 2013. TURBIDITY: Oct 2011 to Sep 2013. SUSPENDED-SEDIMENT CONCENTRATION: Oct 2011 to Sep 2013. SUSPENDED-SEDIMENT DISCHARGE: Oct 2011 to Sep 2013.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum daily, 30.1 °C, Jul 19, 2013; minimum daily, 0.7 °C, Jan 3, 2013. TURBIDITY: Maximum daily, 240 FNU, Mar 20, 2013; minimum daily, 1.3 FNU, Jul 27, 2012. SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily, 927 mg/L (estimated), Apr 20, 2013; minimum daily, 2 mg/L, Jul 27-29, 2012. SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 66,000 tons (estimated), Apr 20, 2013; minimum daily, 0.281 tons, Jul 28, 2012.