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Water-Year Summary for Site 02181580

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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
00045 Precipitation(Sum)  
00045 Precipitation(Sum) [Operational]  
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2022: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2022
LOCATION - Lat 34°43'55", long 83°22'33" referenced to North American Datum of 1927, Rabun County, GA, Hydrologic Unit 03060102, on right bank 200 feet upstream from the Tallulah Falls Powerhouse in the Tallulah Gorge, 1.2 miles downstream from Cascade Falls, 1.7 miles downstream from Tallulah Falls Lake, and 0.5 miles northeast of Tallulah Lodge.
DRAINAGE AREA - 184.4 mi².
DISCHARGE: November 1997 to current year.
GAGE HEIGHT: November 1997 to current year.
GAGE - Satellite telemetry with a water-stage recorder. Datum of gage is 940 feet above National Geodetic Vertical Datum (NGVD) of 1929 (from topographic map).
COOPERATION - Georgia Power Corporation.
For period: 10/01/2014-04/18/2019: Discharge records fair, except for periods of estimated discharge, which are poor. Gage height records good.
For period: 04/19/2019-01/08/2020: Discharge records fair, except for periods of estimated discharge, which are poor. Gage height records fair.
For period: 01/09/2019-10/27/2020: Discharge records poor. Gage height records poor.

Streamflow regulated by Tallulah Falls Dam.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge recorded, 21,000 cfs, from rating curve extended above 900 cfs on basis of broad-crested weir computation, September 17, 2004; maximum gage height recorded, 14.91 feet, from floodmarks, September 17, 2004; minimum daily discharge, 2.0 cfs, December 18, 1997.
PERIOD OF RECORD - January 2001 to current year.
INSTRUMENTATION - Tipping-bucket raingage.