USGS Water-Year Summary for Site 01631000

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	00060 Discharge(Mean)

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

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USGS Water-Year Summary 2023

01631000 SOUTH FORK SHENANDOAH RIVER AT FRONT ROYAL, VA

LOCATION - Lat 38°54'50", long 78°12'40" referenced to North American Datum of 1927, Warren County, VA, Hydrologic Unit 02070005, on left bank 0.7 mi downstream from bridge on State Highway 619, 1.0 mi west of Front Royal, and 3.5 mi upstream from confluence with North Fork.

DRAINAGE AREA - 1,634 mi².

REVISIONS HISTORY - WSP 951: 1936(M). WSP 1171: 1935(M), 1937(M). OFR 2006-1308: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1899 to September 1906, October 1930 to current year. Monthly discharge only for some periods, published in WSP 1302.

GAGE - Water-stage recorder. Datum of gage is 468.69 ft above NAVD of 1988. June 1899 to July 1906, non-recording gage at site 1.0 mi upstream at different datum.

REMARKS - Large diurnal fluctuation at low and medium flow caused by powerplants upstream from station prior to 1954; occasional large diurnal fluctuation thereafter. National Weather Service gage-height telemeter at station. Maximum discharge, 130,000 ft³/s, from rating curve extended above 92,000 ft³/s on basis of slope-area measurement of peak flow.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1870, that of Oct. 16, 1942.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1930 to 1931, 1945, 1948 to 1949, 1951 to 1956, 1967 to 1986, 1996 to 2002, and 2004 to current year.

PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: August 2007 to October 2008.
pH: August 2007 to October 2008.
SPECIFIC CONDUCTANCE: October 1952 to September 1956, April 1968 to September 1977, October 1978 to August 1980, and March 2007 to October 2008.
SUSPENDED SEDIMENT DISCHARGE: April 1952 to September 1956.
WATER TEMPERATURE: October 1952 to September 1956, April 1968 to September 1977, October 1978 to August 1980, and March 2007 to October 2008.

EXTREMES FOR PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: Maximum recorded, 17.4 mg/L, Jan. 21, 2008, but may have been higher during periods of missing record; minimum recorded, 4.5 mg/L, April 13, 2008, but may have been lower during periods of missing record.
pH: Maximum recorded, 9.7 std units, many days, but may have been higher during periods of missing record; minimum recorded, 7.6 std units, April 16, 17, 2008, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum recorded, 465 microseimens/cm, Oct. 16, 1968, but may have been higher during periods of missing record; minimum recorded, 81 microseimens/cm, Aug. 3, 1969, but may have been lower during periods of missing record.
SUSPENDED SEDIMENT DISCHARGE: Maximum calculated, 183,000 tons/day, Aug. 19, 1955; minimum calculated, 1.0 tons/day, many days 1953 to 1956.
WATER TEMPERATURE: Maximum recorded, 32.1°C, July 5, 1955, but may have been higher during periods of missing record; minimum recorded, 0.0°C, many days, but may have been lower during periods of missing record.