USGS Water-Year Summary 2017
03092460 West Branch Mahoning River at Wayland, OH
LOCATION - Lat 41°09'25", long 81°04'19" referenced to North American Datum of 1927, Portage County, OH, Hydrologic Unit 05030103, on the right bank 200 ft upstream from the highway bridge on County Rd. 132, 0.3 mi south of Wayland, 0.4 mi below Michael J. Kirwan Dam.
DRAINAGE AREA - 81.7 mi².
PERIOD OF RECORD - October 1968 to September 1991. Prior to Oct. 1969 published as "West Br. Mahoning River bel West Br. Dam at Wayland". October 2009 to current year.
GAGE - Water stage recorder. Datum of gage is 925.83 ft NAVD 1988. Prior to Oct. 1, 2010 datum of gage was published as 926.44 ft NGVD 1929 (levels by U.S. Army Corps of Engineers). Prior to October 1971 at datum 927.33 ft NGVD 1929.
COOPERATION - Station maintained in cooperation with U.S. Army Corps of Engineers, Pittsburgh District.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,380 ft³/s Feb. 25, 1971, gage height, 11.82 ft; minimum discharge 2.5 ft³/s Apr. 9, 1969.
PERIOD OF RECORD - October 2009 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2009 to current year.
INSTRUMENTATION - Temperature probe. Electronic data logger set for 1-hour interval.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 23.9 °C, Aug. 16, 2016; minimum, 0.0 °C, Jan. 19 and 20, 2016.