USGS Water-Year Summary for Site 01634000

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	Available Parameters
	00010 Temperature, water(Min.,Max.,Med.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Med.)
	00400 pH(Med.)
	63680 Turbidity, Form Neph(Med.)
	99133 NO3+NO2,water,insitu(Max.,Min.,Med.)

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

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USGS Water-Year Summary 2023

01634000 NORTH FORK SHENANDOAH RIVER NEAR STRASBURG, VA

LOCATION - Lat 38°58'36", long 78°20'11" referenced to North American Datum of 1927, Warren County, VA, Hydrologic Unit 02070006, on right bank at upstream side of bridge on State Highway 55, 1.5 mi southeast of Strasburg, 2.2 mi upstream from Cedar Creek, and 10 mi upstream from confluence with South Fork.

DRAINAGE AREA - 770 mi².

REVISIONS HISTORY - WSP 951: 1936(M). WSP 1001: 1931. WSP 1171: 1929(M), 1933(M), 1936-37. WSP 1302: 1928(M), 1930(M). OFR 2006-1308: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1925 to current year.

GAGE - Water-stage recorder. Datum of gage is 493.31 ft above NAVD of 1988. Prior to Sept. 21, 1930, non-recording gage at present site and datum.

REMARKS - Large diurnal fluctuation at low and medium flow from unknown cause. Water-level elevations at the site were affected during the 1992-93 water years by construction of a new bridge about 50 ft downstream from the gage. National Weather Service gage-height telemeter at station. Maximum discharge, 114,000 ft³/s, from rating curve extended above 46,000 ft³/s.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1870, that of Sept. 7, 1996.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1929, 1945, 1968 to 1986, 1994, 1996 to 2002, and 2004 to current year.

PERIOD OF DAILY RECORD -
pH: February 2006 to October 2008.
SPECIFIC CONDUCTANCE: February 2006 to October 2008. Unpublished records 1948 to 1956 and 1969 to 1971 available in the files of the Geological Survey.
SUSPENDED SEDIMENT DISCHARGE: October 1955 to September 1956.
TURBIDITY: February 2006 to October 2008.
WATER TEMPERATURE: October 1948 to September 1956 and February 2006 to October 2008. Unpublished records 1969 to 1971 available in the files of the Geological Survey.

EXTREMES FOR PERIOD OF DAILY RECORD -
pH: Maximum recorded, 9.6 standard units, Jan. 31, 2007, but may have been higher during periods of missing record; minimum recorded, 7.6 standard units, Nov. 15, 16, 2007, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum recorded, 467 microsiemens per centimeter, Nov. 5, 2007, but may have been higher during periods of missing record; minimum recorded, 119 microsiemens per centimeter, Apr. 16, 2007, but may have been lower during periods of missing record.
SUSPENDED SEDIMENT DISCHARGE: Maximum calculated, 2,470 tons/day, Mar. 15, 1956, but may have been higher during periods of missing record; minimum calculated, 0.0 tons/day, several days in 1955 and 1956.
TURBIDITY: Maximum recorded, 660 formazin nephelometric units, Nov. 17, 2006, but may have been higher during periods of missing record; minimum recorded, 0.0 formazin nephelometric units, on many days.
WATER TEMPERATURE: Maximum recorded, 31.4°C, Aug. 3, 2006, but may have been higher during periods of missing record; minimum recorded, -1.0°C, Feb. 11, 12, 2007, but may have been lower during periods of missing record.