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Water-Year Summary for Site 03171000

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 37°08'30", long 80°34'10" referenced to North American Datum of 1927, Pulaski County, VA, Hydrologic Unit 05050001, on left bank 2,000 ft downstream from bridge on U.S. Highway 11 at Radford, 5 mi downstream from Little River, and 5.5 mi downstream from Claytor Dam.
DRAINAGE AREA - 2,767 mi².
REVISIONS HISTORY - WSP 953: 1940-41. WSP 1305: 1908-12. OFR 2006-1308: Drainage area. See also PERIOD OF RECORD.
PERIOD OF RECORD - October 1907 to September 1915, August 1939 to current year. Records for August 1898 to September 1907, published in WSP 27, 36, 48, 65, 83, 98, 128, 169, 205, 243, and 536, are unreliable and should not be used. Gage-height records collected at same site since 1895 are contained in reports of the National Weather Service.
GAGE - Water-stage recorder. Datum of gage is 1,711.99 ft, NAVD of 1988. Prior to Aug. 30, 1939, non recording gage at highway bridge 2,000 ft upstream, at datum of 1,711.31 ft NGVD of 1929.
REMARKS - Flow regulated since 1939 by Claytor Reservoir (station 03169000). Some additional regulation at low flow by dam and powerplant on Little River. Statistic of monthly mean data and summary statistics for water years 1908-1915 (unregulated flow) are available in previous data books, water years 1991-1998. U.S. Army Corps of Engineers satellite precipitation and gage-height telemeter at station. National Weather Service gage-height telemeter at station. Maximum discharge, 218,000 ft³/s, from rating curve extended above 76,000 ft³/s on basis of records for other stations on New River and flow over Claytor Dam, computed by Appalachian Power Company.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 16, 1916, reached a stage of 35.7 ft, discharge, 200,000 ft³/s, at site and datum used by Geological Survey 1907-15, from reports of the National Weather Service.
EXTREMES FOR PERIOD PRIOR TO REGULATION - 1908-15: Maximum peak flow, 46,000 ft³/s, May 21, 1909; maximum gage height, 15.00 ft, May 21, 1909 and Mar. 27, 1913, at site and datum then in use. Instantaneous low flow not determined.
PERIOD OF RECORD - December 2006 to March 2009.
SPECIFIC CONDUCTANCE: December 2006 to September 2008.
WATER TEMPERATURE: December 2006 to March 2009.
INSTRUMENTATION - Specific conductance and water temperature monitor. Electronic data logger with 15-minute recording interval.
SPECIFIC CONDUCTANCE: Maximum, 240 microseimens/cm, Sept. 16, 2008; minimum, 91 microseimens/cm, Apr. 13, 2008.
WATER TEMPERATURE: Maximum, 26.8°C, Aug. 24, 2007; minimum, 0.1°C, Feb. 5, 10, 2007.