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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
07380400 Bayou Lafourche at Donaldsonville, LA
LOCATION - Lat 30°06'03.2", long 90°59'36.5" referenced to North American Datum of 1983, Ascension Parish, LA, Hydrologic Unit 08090301,
DRAINAGE AREA - Undetermined.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1957 to September 1985, June 2012 to May 2014; gage height only. May 2014 to March 2019; discharge and gage height.
GAGE - Water-stage recorder and acoustic velocity meter. Datum of gage is 0.82 feet below NAVD 88 GEOID12b EPOCH 2010.0000. Prior to October 1985 datum was NGVD 1929.
REMARKS - Pumping plant at Mississippi River pumps total flow of Bayou Lafourche from river except for small amounts of storm drainage during heavy runoff. Satellite telemetry and rain gage at station.
Gage height extremes unavailable for August 1957 to September 1985.
EXTREMES FOR PERIOD OF RECORD - Maximum positive discharge, unknown; maximum daily discharge, 642 ft³/s, Apr. 13, 1980; maximum gage height (since June 2012) 13.65 ft, May 28, 2014; maximum negative discharge, -62 ft³/s, Apr. 14, 2015; minimum gage height(since June 2012), 7.95 ft, June 20, 2017.
