USGS Water-Year Summary 2022
03056000 TYGART VALLEY RIVER AT TYGART DAM NEAR GRAFTON, WV
LOCATION - Lat 39°19'11", long 80°01'31" referenced to North American Datum of 1927, Taylor County, WV, Hydrologic Unit 05020001, downstream of Tygart Dam, 2.2 mi upstream from Three Fork Creek, 2.4 mi upstream from Grafton, and at mile 150.9.
DRAINAGE AREA - 1,187 mi². includes that of Three Fork Creek.
- WDR-US-2006: Drainage area. WDR-US-2009: 1965(M).
PERIOD OF RECORD - July 1938 to September 1982, October 1986 to September 1988 (daily and annual maximum discharge), October 1988 to September 1991 (daily discharge and peaks), October 2005 to September 2008 (annual maximum gage height), October 2008 to September 2009 (annual maximum and minimum gage height), October 2009 to September 2011 (daily discharge and annual maxima), flow from Three Fork Creek not included in computed discharge . October 2011 to present (daily discharge and annual maxima), does not include flow from Three Fork Creek. Prior to October 1960, published as Tygart River at Tygart Dam near Grafton. Records prior to June 1, 1987, provided by U.S. Army Corps of Engineers.
GAGE - Water-stage recorder. Datum of gage is 960.0 ft above NAVD88, determined by GPS Level II survey.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 21,100 ft³/s, Mar. 29, 1965, gage height, 18.50 ft (estimated). Minimum daily discharge, 94.0 ft³/s, Apr. 30, 1941
PERIOD OF RECORD - October 2010 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2010 to current year.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum recorded, 26.0°C, Sept. 23, 2016; minimum recorded, 0.1°C, Feb. 27, 28, 2015, Jan. 30, 31, Feb. 2, 2016.