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Water-Year Summary for Site 01628500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 38°19'21", long 78°45'18" referenced to North American Datum of 1927, Rockingham County, VA, Hydrologic Unit 02070005, on left bank 1.2 mi northeast of Lynnwood and 3.3 mi downstream from confluence of North and South Rivers.
DRAINAGE AREA - 1,079 mi².
REVISIONS HISTORY - WSP 1171: 1933(M). OFR 2006-1308: Drainage area.
PERIOD OF RECORD - October 1930 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,001.74 ft NAVD of 1988.
COOPERATION - Records prior to July 1, 2012 were provided by the Virginia Department of Environmental Quality - Water Division.
REMARKS - Diurnal fluctuation at low flow prior to 1960 caused by mill at Lynnwood and since by irrigation. National Weather Service rain gage and gage-height telemeters and Virginia Department of Emergency Services gage-height radio transmitter at station. Maximum discharge, 107,000 ft³/s, from rating curve extended above 22,000 ft³/s on basis of computations of flow over dam at gage heights 23.60 ft and 27.2 ft.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1870, that of Sept. 7, 1996.
PERIOD OF RECORD - August 2009 to September 2010, October 2011 to September 2012.
PERIOD OF DAILY RECORD - August to 2009 to September 2010.
INSTRUMENTATION - Water temperature monitor. Electronic data logger with 15-minute recording interval.
WATER TEMPERATURE: Maximum, 29.3°C, July 8, 2010; minimum, -0.2°C, Jan. 10, 2010.