USGS Water-Year Summary 2021
02336000 CHATTAHOOCHEE RIVER AT ATLANTA, GA
LOCATION - Lat 33°51'33", long 84°27'16" referenced to North American Datum of 1983, Fulton County, GA, Hydrologic Unit 03130001, on left bank 20.0 feet upstream from Paces Ferry Bridge, 1.0 mile downstream from Rottenwood Creek, 2.5 miles upstream from Peachtree Creek, and at mile 303.0.
DRAINAGE AREA - 1,450 mi².
PERIOD OF RECORD -
DISCHARGE: August 1928 to December 1931, October 1936 to current year. Prior to October 1951, published as "near Vinings".
GAGE HEIGHT: October 1998 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 750.30 feet above North American Vertical Datum (NAVD) of 1988. From August 3, 1928, to December 31, 1931, gage was a water-stage recorder, and November 15, 1936 to March 8, 1937, a non-recording gage was located at the same site and datum. Since June 1967, auxiliary water-stage recorder located at bridge on US 41, 0.8 miles upstream.
COOPERATION - U.S. Army Corps of Engineers, Mobile District; Georgia Department of Natural Resources, Environmental Protection Division, Georgia Power Corporation, Upper Chattahoochee River Keeper.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1896, 29.0 feet in December 1919, from flood marks at site 2.6 miles downstream and stage relation between the two sites.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 40,900 cfs, September 21, 2009; maximum gage height recorded, 28.12 feet, September 21, 2009; minimum daily discharge, 296 cfs, September 2, 1957.
PERIOD OF RECORD - May 1937 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: May 2002 to current year.
WATER TEMPERATURE: May 2002 to current year.
TURBIDITY: May 2002 to current year.
INSTRUMENTATION - Satellite telemetry with a continuous water-quality monitor.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 139 microsiemens, October 19, 2017; minimum recorded, 33 microsiemens, August 13, 2005.
WATER TEMPERATURE: Maximum recorded, 28.9°C, July 21, 2017; minimum recorded, 1.6°C, December 14, 2010.
TURBIDITY: Maximum recorded, >1,310 FNU, October 1, 2006, December 10, 2004, February 4, 2011; minimum recorded, <0.5 FNU, several days.