USGS Water-Year Summary for Site 01632900

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Med.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Med.)
	00300 Dissolved oxygen(Max.,Min.,Med.)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Min.,Max.)
	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

01632900 SMITH CREEK NEAR NEW MARKET, VA

LOCATION - Lat 38°41'36", long 78°38'35" referenced to North American Datum of 1927, Shenandoah County, VA, Hydrologic Unit 02070006, on left bank 25 ft upstream from bridge on State Highway 620, 3.6 mi north of New Market, and 4.4 mi upstream from mouth.

DRAINAGE AREA - 93.6 mi².

REVISIONS HISTORY - OFR 2006-1308: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1960 to current year.

GAGE - Water-stage recorder. Datum of gage is 880.84 ft NAVD of 1988.

COOPERATION - Records prior to Oct. 1, 2011 were provided by the Virginia Department of Environmental Quality - Water Division.

REMARKS - Maximum discharge, 12,400 ft³/s, from rating curve extended above 2,300 ft³/s on basis of contracted-opening measurement at gage height 16.38 ft.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Oct. 1, 1959, reached a stage of 10.7 ft, discharge not determined, from information by local residents.

WATER-QUALITY RECORDS

PERIOD OF RECORD - March 2007 to current year.

PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: April 2010 to current year.
NITRATE: March 2012 to current year.
pH: April 2010 to current year.
SPECIFIC CONDUCTANCE: March 2007 to October 2008, April 2010 to current year.
TURBIDITY: April 2010 to current year.
WATER TEMPERATURE: March 2007 to October 2008, April 2010 to current year.

COOPERATION - Daily records prior to October 2008 were provided by the Virginia Department of Environmental Quality - Water Division.

INSTRUMENTATION - Water-quality and nitrate monitors. Electronic data logger with 15-minute recording interval. Specific conductance and water temperature monitor March 2007 to October 2008.

EXTREMES FOR PERIOD OF RECORD -

Historic Extremes

Dissolved Oxygen:

Max: 16.8 mg/L on 01/17/2018.

Min: 4.611 mg/L on 10/12/2017.

Nitrate:

Max: 4.29 mg/L on 06/16/2019.

Min: 0.63 mg/L on 04/15/2017.

Specific Conductance:

Max: 656 uS/cm on 08/19/2017 (data is deemed ususable). 653 uS/cm on 01/30/2022.

Min: 137 uS/cm on 04/30/2014.

Water Temperature:

Max: 29.0 C on 07/08/2012.

Min: -0.40 C on 01/27/2016.

Turbidity:

Max: 837.8 FNU on 06/21/2018.

Min: 0.505 FNU on 11/09/2022.

pH:

Max: 8.8 pH on 03/22/2014, 03/24/2014 and 04/18/2017.

Min: 7.3 pH on 04/30/2020.

EXTREMES FOR PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: Maximum: 16.6 mg/L, Jan. 10, 2011, but may have been higher during periods of missing record; minimum, 5.3 mg/L, July 9, 2012, but may have been lower during periods of missing record.
NITRATE: Maximum: 3.85 mg/L as N, Sept. 29, 2015, but may have been higher during periods of missing record; minimum: 0.92 mg/L as N, Sept. 6, 2015, but may have been lower during periods of missing record.
pH: Maximum: 8.8 standard units, on several days, but may have been higher during periods of missing record; minimum: 7.4 standard units, July 1, 2012, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum: 656 microsiemens/cm, Aug. 19, 20, 2007, but may have been higher during periods of missing record; minimum: 151 microsiemens/cm, Apr. 16, 2011, but may have been lower during periods of missing record.
TURBIDITY: Maximum: 1,190 FNU, Apr. 16, 2011, July 7, 2015, but may have been higher during periods of missing record; minimum: 0.0 FNU, on many days.
WATER TEMPERATURE: Maximum: 29.0°C, July 8, 2012, but may have been higher during periods of missing record; minimum: -0.2°C, on several days.