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Water-Year Summary for Site 02336490

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Max.,Min.,Mean)  

Water year 2020: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2020
02336490 CHATTAHOOCHEE RIVER AT GA 280, NEAR ATLANTA, GA
LOCATION - Lat 33°49'01", long 84°28'48" referenced to North American Datum of 1983, Fulton County, GA, Hydrologic Unit 03130002, at Georgia Power Plant entrance at the boat ramp, 0.6 miles upstream from Norfolk-Southern Railway bridge, 1.7 miles downstream from Peachtree Creek, and at mile 298.8.
DRAINAGE AREA - 1,590 mi².
REVISIONS HISTORY - WDR-US-2011: 2010.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: March 1981 to current year.
GAGE HEIGHT: October 1998 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 736.6 feet above North American Vertical Datum (NAVD) of 1988.
COOPERATION - U.S. Army Corps of Engineers, Mobile District.
REMARKS -
For period 10/01/2013-10/03/2017: Discharge record fair, except for days of estimated discharge, which are poor. Gage height record good.
For period 10/04/2017-10/17/2018: Discharge record good. Gage height record good.
For period 10/18/2018-05/22/2019: Discharge record fair. Gage height record good.
For period 05/23/2019-07/30/2019: Discharge record poor. Gage height record good.
For period 07/31/2019-06/16/2020: Discharge record fair. Gage height record fair.
For period 06/17/2020-08/19/2020: Discharge record fair. Gage height record good.
For period 08/20/2020-01/22/2021: Discharge record poor. Gage height record good.
For period 01/23/2021-02/22/2021: Discharge record fair. Gage height record good.

Flow regulated by Lake Sidney Lanier. Considerable diurnal fluctuation caused by the operation of the Morgan Falls hydroelectric plant.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of April 13, 1979, reached a stage of 30.71 feet from flood marks, discharge, 32,000 cfs.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 42,300 cfs, September 21, 2009; maximum gage-height recorded, 35.98 feet, September 21, 2009; minimum daily discharge, 768 cfs, November 11, 2001.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - May 2001 to September 2007 and October 2008 to September 2009.
INSTRUMENTATION - Tipping-bucket raingage.