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LOCATION.--Lat 33o51'33", long 84o27'16", Fulton-Cobb County line,
Hydrologic Unit 03130001, on left bank 20 ft upstream from Paces
Ferry Bridge, at Atlanta, 2.5 mi upstream from Peachtree Creek,
1 mi downstream from Rottenwood Creek, and at mile 303.0.
DRAINAGE AREA.--1,450 mi2.
- MICROBIAL DATA:
- PERIOD OF RECORD.--February 1976 to September 1979, March 1999 to present.
- COOPERATION.--March 1999 to present water-quality samples collected with assistance of
National Park Service.
- CHEMICAL DATA:
- PERIOD OF RECORD.--May 1937 to April 1938, September 1957 to September 1979,
September 1988 to October 1988, July 1995, March 1999 to present.
- REMARKS.--Records of chemical analyses for the water years 1974-79 are
published in reports of the U.S. Geological Survey.
- CHEMICAL DATA:
- PERIOD OF RECORD.--August 1977 to December 1977.
- STREAM DISCHARGE DATA:
- PERIOD OF RECORD.--August 1928 to December 1931, October 1936 to present.
- GAGE.--Water-stage recorder. Datum of gage is 750.10 ft above sea level.
Aug. 3, 1928, to Dec. 31, 1931, water-stage recorder,
and Nov. 15, 1936 to Mar. 8, 1937, nonrecording gage at same
site and datum. Since June 1967, auxiliary water-stage recorder
at bridge on U.S. Highway 41, 0.8 mi upstream.
- REMARKS.--Records good. Flow regulated by Lake Sidney Lanier since January 1956
(USGS station 02334400). Diversions above station by Gwinnett,
DeKalb, and Cobb Counties; return flows above station by Gwinnett
and Cobb Counties. Considerable diurnal fluctuation caused by
Morgan Falls hydroelectric plant 9.5 mi above station.
Water-discharge records for the periods August 1928 to December 1931 and
October 1936 to current year are in reports published by the U.S. Geological
Survey. Prior to October 1951, published as "near Vinings".
- AVERAGE DISCHARGE.--64 years (water years 1929-31, 1937-97), 2,566 ft3/s,
24.03 in/yr, unadjusted.
- EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage known since at least 1896,
29.0 ft in December 1919, from floodmarks at site 2.6 mi downstream and stage
relation between the two sites.
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