USGS Water-Year Summary 2020
03062225 MONONGAHELA RIVER AT OPEKISKA LOCK & DAM (LOWER), WV
LOCATION - Lat 39°33'52", long 80°03'03" referenced to North American Datum of 1927, Monongalia County, WV, Hydrologic Unit 05020003, and at mile 115.4.
DRAINAGE AREA - 2,523 mi².
PERIOD OF RECORD - October 2010 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 825.54 ft above NAVD 88 (VERTCON conversion of 826.0 ft above NGVD 29).
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, July 29, 2017 at 18.82 ft; minimum gage height, April 13, 2017 at 7.92 ft.
PERIOD OF RECORD - February 2014 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, 3.17 in., Sept 9, 2018; minimum precipitation, 0.00 in., on many days.