USGS Water-Year Summary 2020
03114280 OHIO RIVER AT HANNIBAL LOCK AND DAM (LOWER), OH
LOCATION - Lat 39°40'02", long 80°51'58" referenced to North American Datum of 1927, Monroe County, OH, Hydrologic Unit 05030201, at downstream side of dam, and at mile 126.4 measured downstream from Pittsburgh, PA.
DRAINAGE AREA - 25,930 mi².
PERIOD OF RECORD - November 2005 to September 2012 (annual maximum and minimum gage height), October 2012 to current year (daily mean gage height).
GAGE - Water-stage recorder with satellite telemeter. Datum of gage is 589.23 ft above NAVD 88 (VERTCON conversion of 589.80 ft above NGVD 29).
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 33.85 ft, Mar. 12, 2011; minimum, 11.33 ft, Nov. 9, 2005.
PERIOD OF RECORD - March 2015 to current year.
INSTRUMENTATION - Electronic data logger with 15-minute record interval. Heated tipping bucket rain gage.
EXTREMES FOR PERIOD OF RECORD - Maximum daily precipitation, 3.44 in., Jun. 23, 2017; minimum precipitation, 0.00 in., on many days.