USGS Water-Year Summary for Site 02356000

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	Available Parameters
	00010 Temperature, water(Max.,Mean,Min.)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Max.,Min.,Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Mean,Min.)

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

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USGS Water-Year Summary 2023

02356000 FLINT RIVER AT BAINBRIDGE, GA

LOCATION - Lat 30°54'37.1", long 84°34'49.8" referenced to North American Datum of 1983, Decatur County, GA, Hydrologic Unit 03130008, on downstream side of bridge on US 27 (Business Route), 0.2 mi downstream from Seaboard Coast Line Railroad bridge, and 29.2 mi upstream from Jim Woodruff Dam, 5.19 mi upstream from confluence with Fourmile Creek, 2.37 mi downstream from confluence with Big Slough Creek, 0.6 mi northwest of Bainbridge, and at mile 29.0.

DRAINAGE AREA - 7,570 mi².

REVISIONS HISTORY - Precipitation for the periods Jun. 9, 2019 and Jul. 30, 2019, were revised on May 19, 2020, based on the addition of daily sum precipitation.

SURFACE-WATER RECORDS

PERIOD OF RECORD -

DISCHARGE: October 1907 to December 1913, October 1928 to September 1971, October 1971 to September 1996(annual peaks only), October 2001 to current year.
GAGE-HEIGHT: October 2001 to current year.
WATER VELOCITY: April 2001 to current year.

GAGE - Satellite telemetry with a water-stage recorder and an acoustic velocity meter. Datum of gage is 57.7 feet above North American Vertical Datum (NAVD) of 1988. Prior to December 31, 1913, a non-recording gage was located at same site at datum 0.3 feet higher. From October 1, 1928 to January 14, 1929, a non-recording gage was located at present site and datum. An auxiliary water-stage recorder was located at a site 6.4 miles upstream January 15, 1957 to September 1971.

COOPERATION - Georgia Department of Natural Resources, Environmental Protection Division.

REMARKS - Gage-height records are generally good. Water velocity records are generally good. Discharge records are generally good 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.

Water velocity data represent water velocity at the downstream cross-section of the bridge with positive values in the downstream direction. Flow regulated by power plants at Flint River Reservoir since 1921, with a capacity of 7,500 acre-feet; and at Warwick Reservoir since 1930, with a capacity of about 35,000 acre-feet. Normal operation of power plants does not materially affect figures of monthly runoff.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1893, 40.9 feet, present datum, Jan. 24, 1925, discharge 101,000 cfs, from rating curve extended above 70,000 cfs on the basis of slope-conveyance studies.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 108,000 cfs, July 14, 1994; maximum gage height recorded, 37.22 feet, July 14, 1994; minimum daily discharge, 1,010 cfs, September 5, 2011.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - April 2001 to current year.

INSTRUMENTATION - Tipping-bucket raingage.

WATER-QUALITY RECORDS

PERIOD OF RECORD - January 2000 to current year.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: April 2017 to current year.

WATER TEMPERATURE: April 2017 to current year.

DISSOLVED OXYGEN: April 2017 to current year.

COOPERATION -

DISCRETE WATER QUALITY: Georgia Department of Natural Resources, Environmental Protection Division.

CONTINUOUS WATER QUALITY: U.S. Army Corps of Engineers, Mobile District.

REMARKS -

DISCRETE WATER QUALITY: Analyzing agency is represented by the five-digit code listed under USGS Water Science Center special parameter code 99920. Laboratory analyses with analyzing agency code 81341 are by the Laboratory Services Section, Environmental Protection Division, Georgia Department of Natural Resources. Field determinations of Discharge, Specific Conductance, pH, Water Temperature, Air Temperature, and Dissolved Oxygen are by the U.S. Geological Survey.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 218 microsiemens, June 7 and 8, 2019; minimum recorded, 41 microsiemens, April 03, 2023

WATER TEMPERATURE: Maximum recorded, 30.0°C, August 17 and 18, 2017, August 13, 2019; minimum recorded, 7.6°C, January 20, 2018.

DISSOLVED OXYGEN: Maximum recorded, 11.6 mg/L, January 20, 2018; minimum recorded, 4.20 mg/L, October 21, 2018.