USGS Water-Year Summary for Site 02338000

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	Available Parameters
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2023

02338000 CHATTAHOOCHEE RIVER NEAR WHITESBURG, GA

LOCATION - Lat 33°28'35.5", long 84°54'04.3" referenced to North American Datum of 1983, Carroll County, GA, Hydrologic Unit 03130002, at downstream end of right bank pier of bridge on GA 16, 0.5 miles upstream from Central of Georgia Railroad bridge, 1.2 miles southeast of Whitesburg, 1.5 miles downstream from Cedar Creek, 2.0 miles downstream from Snake Creek, and at river mile 259.8.

DRAINAGE AREA - 2,430 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD -
DISCHARGE: October 1938 to June 1954; January 1965 to current year.
GAGE HEIGHT: October 1998 to current year.

GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 682.2 feet above North American Vertical Datum (NAVD) of 1988. Prior to May 1, 1949, a non-recording gage was located at site 1.0 mile upstream at datum 2.00 feet higher. From May 1, 1949 to June 30, 1954, a non-recording gage was located at present site at datum 2.00 feet higher.

COOPERATION - U.S. Army Corps of Engineers, Mobile District; USGS National Water-Quality Assessment (NAWQA) Program.

REMARKS - Gage-height records are generally fair. Discharge records are generally fair except for estimated discharges, which are 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.

Flow regulated by Lake Sidney Lanier since January 1956. Considerable diurnal fluctuation caused by the operation of the Morgan Falls hydroelectric plant. Statistics prior to regulation are available upon request.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 60,600 cfs, September 23, 2009; maximum gage-height recorded, 29.74 feet, September 23, 2009; minimum daily discharge, 468 cfs, October 26, 1941.

EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge recorded, 59,000 cfs, January 10, 1946, from rating curve extended above 30,000 cfs on basis of velocity area and channel capacity studies; maximum gage-height recorded, 25.10 feet, January 10, 1946, at site and datum then in use and from graph based on gage readings.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - December 2000 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - February 1968 to May 1972, July 1975 to current year.

REMARKS - Laboratory chemical analyses are by the U.S. Geological Survey, National Water Quality Laboratory. Field determinations of stream discharge, specific conductance, pH, water temperature, turbidity, dissolved oxygen, and alkalinity are by the U.S. Geological Survey.