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Water-Year Summary for Site 02335815

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The daily maximum and minimum water level values for groundwater wells after September 30, 2023 are no longer being displayed on NWISWeb. However, these values can be determined using the instantaneous values that are available through the Time-Series: Current/Historical Observations option in the available data dropdown box for the station.


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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
02335815 CHATTAHOOCHEE RIVER BELOW MORGAN FALLS DAM,
LOCATION - Lat 33°58'03.9", long 84°23'01.2" referenced to North American Datum of 1983, Fulton County, GA, Hydrologic Unit 03130001, on left bank 400 feet downstream of Morgan Falls Dam, 3.8 miles upstream from mouth of Sope Creek.
DRAINAGE AREA - 1,370 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
DISCHARGE: October 2001 to current year.
GAGE-HEIGHT: October 2001 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 12.43 feet below North American Vertical Datum (NAVD) of 1988 (from GNSS survey).
COOPERATION - Georgia Power Corporation.
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.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 35,500 cfs, September 21, 2009; maximum gage-height recorded, 827.01 feet, September 21, 2009; minimum daily discharge, 630 cfs, September 23, 2001.
WATER-QUALITY RECORDS
REMARKS -
For period 10/01/2013-12/12/2017: Water temperature records good.
For period 12/12/2017-07/03/2018: Water temperature records fair.
For period 07/03/2018-10/21/2020: Water temperature records poor.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum recorded, 27.5°C, July 21, 2020; minimum recorded, 2.8°C, February 19, 2015.