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USGS Water-Year Summary 2024
02016000 COWPASTURE RIVER NEAR CLIFTON FORGE, VA
LOCATION - Lat 37°47'30", long 79°45'35" referenced to North American Datum of 1927, Alleghany County, VA, Hydrologic Unit 02080201, on left bank 100 ft downstream from bridge on State Highway 633, 2.5 mi upstream from confluence with Jackson River, and 4.0 mi southeast of Clifton Forge.
DRAINAGE AREA - 461 mi².
REVISIONS HISTORY - WSP 952: 1925-41. WSP 2104: Drainage area. See also PERIOD OF RECORD.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1925 to current year. Records for May 1907 to August 1908, published in WSP 242, are unreliable and should not be used.
GAGE - Water-stage recorder. Datum of gage is 1,007.02 ft NAVD of 1988. Prior to October 1934, nonrecording gage at site 100 ft upstream, at present datum.
REMARKS - Low flows affected by springs and by occasional regulation from unknown source. Maximum discharge, 40,900 ft³/s, from rating curve extended above 13,000 ft³/s on basis of slope-area measurements at gage heights 15.70 ft and 19.15 ft.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in March 1913 reached a stage of 20.8 ft, from floodmarks, discharge, about 45,000 ft³/s.
WATER-QUALITY RECORDS
PERIOD OF RECORD - February 2007 to October 2008.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: February to September 2008.
WATER TEMPERATURE: February 2007 to Sepember 2008.
SPECIFIC CONDUCTANCE: February to September 2008.
WATER TEMPERATURE: February 2007 to Sepember 2008.
INSTRUMENTATION - Specific conductance and water temperature monitor. Electronic data logger with 15-minute recording interval.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum, 215 microseimens/cm, Aug. 19, 2008; minimum, 64 microseimens/cm, Feb. 2, 2008.
WATER TEMPERATURE: Maximum, 31.7°C, Aug. 25, 2007; minimum, 0.0°C, Jan. 21, 24, 2008.
SPECIFIC CONDUCTANCE: Maximum, 215 microseimens/cm, Aug. 19, 2008; minimum, 64 microseimens/cm, Feb. 2, 2008.
WATER TEMPERATURE: Maximum, 31.7°C, Aug. 25, 2007; minimum, 0.0°C, Jan. 21, 24, 2008.
