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Water-Year Summary for Site 02079490

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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
00021 Temperature, air(Max.,Min.)  
00045 Precipitation(Sum)  
62614 Elevation, lake/res, NGVD29(Max.,Min.,Mean)  

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

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USGS Water-Year Summary 2021
LOCATION - Lat 36°35'54", long 78°17'57" referenced to North American Datum of 1927, Mecklenburg County, VA, Hydrologic Unit 03010102, at John H. Kerr Dam on Roanoke River, 2.7 mi upstream from Allen Creek, 6.7 mi southeast of Boydton, 18 mi upstream from the Virginia-North Carolina State line, and at mile 178.7.
PERIOD OF RECORD - March 2005 to current year. July 1950 to September 2004, month end elevations only, provided by the U.S. Army Corps of Engineers.
GAGE - Water-stage recorder. Datum of gage is 0.00 ft NGVD of 1929.
REMARKS - Reservoir is formed by concrete dam with earth embankments. Spillway, with crest at elevation 288.0 ft, is equipped with 22 radial gates 32 ft high by 42 ft wide. Storage began in September 1950 during construction; initial filling started June 30, 1952; water in reservoir first reached rule-curve elevation in March 1953. Total capacity at top of gates, elevation, 320 ft, is 2,770,000 acre-ft of which 1,281,400 acre-ft is controlled flood storage between elevations 300 ft, top of power pool, and 320 ft; 316,900 acre-ft is available for power between elevations 293.0 ft, bottom of power pool, and 300 ft; 1,171,700 acre-ft is inactive and dead storage below elevation 293.0 ft. Reservoir is used for flood control, hydroelectric power, low-water regulation for navigation and pollution abatement, release of water for downstream fish spawning, and recreation.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 319.61 ft, Apr 29, 1987; minimum elevation, 280.23 ft, Feb 3, 1956.
AIR TEMPERATURE: May 2011 to current year.
PRECIPITATION: October 2010 to current year. Unpublished records available March 2005 to September 2010 in files of the USGS.
INSTRUMENTATION - Electronic data logger with a 15-minute record interval. Tipping bucket rain gage and air temperature monitor.
AIR TEMPERATURE: Maximum, 103°F, June 29, 2012; minimum, 5.2°F, Jan. 30, 2014.
PRECIPITATION: Maximum daily precipitation, 3.69 in., Oct. 8, 2016.