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Water-Year Summary for Site 02070000

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2024: 2023-10-01 to 2024-09-30
 
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USGS Water-Year Summary 2024
02070000 NORTH MAYO RIVER NEAR SPENCER, VA
LOCATION - Lat 36°34'05", long 79°59'15" referenced to North American Datum of 1927, Henry County, VA, Hydrologic Unit 03010103, on left bank 800 ft downstream from bridge on State Highway 629 at Moores Mill, 2.1 mi downstream from Horse Pasture Creek, and 3.8 mi southeast of Spencer.
DRAINAGE AREA - 108 mi².
REVISIONS HISTORY - WSP 1303: 1929-32(M), 1934(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1928 to current year. Monthly discharge only for some periods, published in WSP 1303.
GAGE - Water-stage recorder. Datum of gage is 730.94 ft NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Jan. 23, 1936, nonrecording gage at site 800 ft upstream at datum of 732.44 ft NGVD of 1929. July 25 to Sept. 27, 1936, nonrecording gage at present site and datum.
COOPERATION - Records were provided by the Virginia Department of Environmental Quality - Water Division.
REMARKS - Maximum discharge, 17,200 ft³/s, from rating curve extended above 7,200 ft³/s on basis of slope-area measurement at gage height 13.41 ft and velocity-area study.
WATER-QUALITY RECORDS
PERIOD OF RECORD - November 2006 to September 2008.
PERIOD OF DAILY RECORD - March 2007 to September 2008.
COOPERATION - Daily records were provided by the Virginia Department of Environmental Quality - Water Division.
INSTRUMENTATION - Specific conductance and water temperature monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 226 microsiemens/cm, Sept. 14, 2007; minimum, 19 microsiemens/cm, May 9, 2008.
WATER TEMPERATURE: Maximum, 28.5°C, Aug. 9, 2007, July 22, 2008; minimum, 0.2°C, Jan. 5, 22, 2008.