USGS Water-Year Summary for Site 023432415

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

023432415 CHATTAHOOCHEE R .36 MI DS WFG DAM NR FT GAINES, GA

LOCATION - Lat 31°37'19.9", long 85°03'33" referenced to North American Datum of 1983, Henry County, AL, Hydrologic Unit 03130004, at the right bank steel pier, 0.36 mi downstream of Walter F. George Dam, 0.34 mi upstream of Cemochechobee Creek, and 2.0 mi north-northwest of Fort Gaines, GA.

DRAINAGE AREA - 7,460 mi².

REVISIONS HISTORY - WDR-GA-2012: 2009-2011.

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: July 2009 to current year.
GAGE-HEIGHT: July 2009 to current year.
WATER VELOCITY: July 2009 to current year.

GAGE - Satellite telemetry with a water-stage recorder and an acoustic velocity meter. Velocity data represents the average water velocity at the upstream cross-section of the bridge with positive values in the downstream direction. The gage datum of 0.009 feet is referenced to National American Vertical Datum (NAVD) of 1988.

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

REMARKS - Gage-height records are generally good. Water velocity records are generally fair. Discharge records are generally poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-ga_nwisweb_data_inquiries@usgs.gov.

Water velocity data represent water velocity at the downstream cross-section of the bridge with positive values in the downstream direction. Flow regulated by Lake Sidney Lanier, West Point Lake, Lake Harding, and Walter F. George Lake.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 156,000 cfs, estimated, December 26, 2015; maximum gage-height recorded, 150.44 feet, estimated, December 26, 2015; minimum daily discharge, 144 cfs, July 2, 2016.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: May 2010 to current year.

WATER TEMPERATURE: May 2010 to current year.

DISSOLVED OXYGEN: May 2010 to current year.

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

INSTRUMENTATION - In-situ water-quality monitor measuring Specific Conductance, Water Temperature, and Dissolved Oxygen at 15-minute intervals.

REMARKS -

For period 05/27/2010-09/30/2010: Specific Conductance rated good, except for 07/08/2010, which is rated fair. Water Temperature is rated good. Dissolved Oxygen is rated good, except for the periods 06/23/2010-06/26/2010, which is rated fair, and 06/27/2010-07/08/2010, which is rated poor.

For period 10/01/2011-09/30/2014: Continuous records of Specific Conductance, Water Temperature, and Dissolved Oxygen are rated good.

For period 10/01/2014-09/30/2015: Continuous records of Specific Conductance, Water Temperature, and Dissolved Oxygen are rated good for the year, except for the period 03/31-05/19/2015, which is rated fair.

For period 10/01/2015-09/30/2016: Continuous records of Specific Conductance, Water Temperature, and Dissolved Oxygen are rated good for the year. Missing record for the period December 27, 2015 to January 19, 2016 due to equipment damage sustained during flooding.

For period 10/01/2016-02/14/2018: Continuous records of Specific Conductance, Water Temperature, and Dissolved Oxygen are rated good.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 161 microsiemens/cm, May 21, 2018; minimum recorded, 40 microsiemens/cm, March 11, 2020.
WATER TEMPERATURE: Maximum recorded, 31.8°C August 26, 2023; minimum recorded, 6.4°C, January 13, 14, 2011.
DISSOLVED OXYGEN: Maximum recorded, 14.3 mg/L, January 29, 2014; minimum recorded, 0.1 mg/L, August 17, 2015.