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Water-Year Summary for Site 03612600

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Mean)  
00060 Discharge(Mean)  
00095 Specific cond at 25C(Mean)  
00300 Dissolved oxygen(Mean)  
63680 Turbidity, Form Neph(Mean)  
99133 NO3+NO2,water,insitu(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 37°10'45", long 89°03'30" referenced to North American Datum of 1927, Pulaski County, IL, Hydrologic Unit 05140206, 2.1 miles downstream from Dam 53, 1.0 mile east of Olmsted, 20.2 miles downstream from base gage at Metropolis.
DRAINAGE AREA - 203,000 mi².
PERIOD OF RECORD - 02/20/2013 to 07/15/2016 as 03612600 OHIO RIVER AT OLMSTED; 07/15/2016 to current as OHIO RIVER AT OLMSTED, IL
GAGE - Water-stage recorder and velocimeter. Datum of gage is 277.91 feet above NAVD of 1988.
COOPERATION - U.S. Army Corps of Engineers, Louisville District and National Stream Quality Accounting Network
REMARKS - Records poor. Flow regulated by many dams and reservoirs.

Max gage-height, 52.32 ft. on Feb 28, 2019; Max Discharge, 1,290,000 cfs on Feb 24, 2019.

Max water temperature:  30.7°C on 08/11/2016

Max dissolved oxygen:  14.3 mg/L on 02/21/2015

Max pH:  8.6 pH on 05/12/2015

Max specific conductance:  532 uS/cm on 12/03/2016

Max turbidity:  304 FNU on 01/24/2018

Max nitrate:  2.64 mg/L on 05/24/2014