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Water-Year Summary for Site 07257500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Mean)  
63680 Turbidity, Form Neph(Min.,Mean,Max.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
07257500 ILLINOIS BAYOU NEAR SCOTTSVILLE, AR
LOCATION - Lat 35°27'59", long 93°02'28" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.31, T.10 N., R.19 W., Pope County, AR, Hydrologic Unit 11110202, on downstream side of bridge on State Hwy 164, 1.3 mi north of Scottsville, and 3.1 mi downstream from North Fork Illinois Bayou.
DRAINAGE AREA - 241 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Oct 1947 to Sep 1970 and Oct 1999 to current year. Annual maximum water years 1971 to 1999.
GAGE -

Water-stage recorder. Datum of gage is 447.63 ft above NAVD of 1988 (Reference Frame NAD_83 (2011) (EPOCH:2010.0000), (GEOID18). 

Prior to August 10, 2022 the Datum of Gage was 488.54 ft above NAVD of 1988.  

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 10, 1943, reached a stage of 24.6 ft, from floodmark set by local residents (discharge, 77,000 ft³/s).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 130,000 ft³/s Dec 3, 1982, from rating curve extended above 56,100 ft³/s on basis of contracted-opening and flow-over-road measurement of peak flow and occurred during period of computation of annual maximum only, water years 1971 to 1999.