USGS Water-Year Summary 2021
03092090 West Branch Mahoning River near Ravenna, OH
LOCATION - Lat 41°09'41", long 81°11'50" referenced to North American Datum of 1927, Portage County, OH, Hydrologic Unit 05030103, on the left bank at downstream side of County Rd. 177 bridge near Ravenna.
DRAINAGE AREA - 21.8 mi².
PERIOD OF RECORD - Continuous discharge gage, October 1965 to September 1993; recording crest stage gage, October 1994 to September 2007. Water temperature, October 1965 to August 1979 and July 2011 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,011.17 ft (NAVD 1988). Prior to July 2015, datum of gage was 1,011.8 ft (NGVD 1929) (Portage County benchmark).
COOPERATION - Peak stage only station, U. S. Army Corps of Engineers, Pittsburgh District.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,810 ft³/s, July 22, 2003, gage height, 10.76 ft.
PERIOD OF RECORD - October 1965 to August 1979. October 2011 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 1965 to August 1979. October 2011 to current year.
INSTRUMENTATION - Temperature probe. Electronic data logger set for 15 minute interval.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 28.3 °C, July 21, 2011; minimum, 0.0 °C on many days during winter months.