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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
02040000 APPOMATTOX RIVER AT MATTOAX, VA
LOCATION - Lat 37°25'17", long 77°51'33" referenced to North American Datum of 1927, Amelia County, VA, Hydrologic Unit 02080207, on right bank 75 ft upstream from Norfolk Southern Railway bridge at Mattoax, 0.3 mi upstream from Skinquarter Creek, and 3.7 mi upstream from Flat Creek.
DRAINAGE AREA - 725 mi².
REVISIONS HISTORY - WSP 892: 1938. WSP 972: 1928, 1932, 1934-38. WSP 1303: 1901(M). OFR 2006-1308: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1900 to December 1905, March 1926 to current year.
GAGE - Water-stage recorder. Datum of gage is 173.63 ± 0.1 ft. of NAVD88. August 1900 to December 1905, non-recording gage at present site, different datum. March 1926 to October 1936, nonrecording gage at present site and datum.
COOPERATION - Records were provided by the Virginia Department of Environmental Quality - Water Division.
REMARKS - National Weather Service gage-height telemeter at station. Maximum discharge, 35,000 ft³/s, from rating curve extended above 20,000 ft³/s on basis of records for stations at Farmville and near Petersburg.
WATER-QUALITY RECORDS
PERIOD OF RECORD - December 2006 to September 2008.
PERIOD OF DAILY RECORD - February 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, 156 microsiemens/cm, Aug. 11, 2008; minimum, 49 microsiemens/cm, Sept. 6, 7, 2008.
WATER TEMPERATURE: Maximum, 32.4°C, Aug. 9, 2007; minimum, -0.1°C, Jan. 22, 2008.
SPECIFIC CONDUCTANCE: Maximum, 156 microsiemens/cm, Aug. 11, 2008; minimum, 49 microsiemens/cm, Sept. 6, 7, 2008.
WATER TEMPERATURE: Maximum, 32.4°C, Aug. 9, 2007; minimum, -0.1°C, Jan. 22, 2008.
