USGS Water-Year Summary 2023
03612600 OHIO RIVER AT OLMSTED
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.
SURFACE-WATER RECORDS
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
EXTREMES FOR PERIOD OF RECORD -
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