USGS Water-Year Summary for Site 021989784

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00045 Precipitation(Sum)
	00045 Precipitation(Sum) [Operational]
	00065 Gage height(Mean,Tid.,Tid.)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00480 Salinity(Max.,Min.,Med.)

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Water year 2023: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2023

021989784 LITTLE BACK RIVER ABOVE LUCKNOW CANAL, NEAR LIMEHOUSE, SC

LOCATION - Lat 32°11'08", long 81°07'05" referenced to North American Datum of 1927, Jasper County, SC, Hydrologic Unit 03060109, on a free-standing platform near the left bank, 300 feet upstream from the north control gate of Lucknow Canal, 1.3 miles north of the Savannah Refuge Headquarters, and 3.4 miles southwest of Limehouse, SC.

DRAINAGE AREA - Indeterminate.

REVISIONS HISTORY - WDR GA-07-1: 2007 (Gage-height).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 2004 to current year.

GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 0.0 feet above North American Vertical Datum (NAVD) of 1988 (leveling by Global Positioning System equipment). Prior to October 1, 2007, datum of gage is 0.00 feet above National Geodetic Vertical Datum (NGVD)of 1929 (levels by U.S. Army Corps of Engineers).

COOPERATION - U.S. Army Corps of Engineers, Savannah District.

REMARKS -
For period: 10/01/2014-09/30/2015: Gage height records fair.
For period: 10/01/2015-09/30/2016: Gage height records fair.
For period: 10/01/2016-11/19/2019: Gage height records fair.
For period: 11/19/2019-10/05/2020: Gage height records good.

Gage heights at this site is affected significantly by astronomical tides.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height recorded, 7.30 feet, September 11, 2017; minimum gage height recorded, -6.90 feet, April 16, 2007, and March 8, 2008.
Extremes have been adjusted to NAVD88.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - October 2004 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: May 1990 to current year.

WATER TEMPERATURE: November 1999 to current year.

DISSOLVED OXYGEN: August 2008 to October 2008.

SALINITY: October 2011 to current year.

REMARKS -
For period: 10/01/2014-09/30/2015: Specific Conductance and Water Temperature records are rated good.
For period: 10/01/2015-09/30/2016: Specific Conductance and Water Temperature records are rated good.
Computed Salinity records are unpublished, but available, for years prior to the 2012 Water Year.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 12,200 microsiemens October 6, 1990; minimum recorded, 40 microsiemens on many days.

WATER TEMPERATURE: Maximum recorded, 32.1 °C, July 25, 26, 2010; minimum recorded, 2.5 °C, January 04, 2018.

DISSOLVED OXYGEN: Maximum recorded, 8.3 mg/L, August 17, 2008; minimum recorded, 1.4 mg/L, August 26, 2008.

SALINITY: Maximum computed, 4.98 parts-per-thousand, November 15, 2012; minimum computed, 0.04 parts-per-thousand on many days in 2013, 2014, and 2015 WY. Actual salinity values were <0.04 parts-per-thousand on many days in 2013 and 2014 water years, but were not able to be computed due to input values exceeding the low end of the rating.