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USGS Water-Year Summary 2024
07366364 Bayou Darbonne Lake at Dam near Downsville, LA
LOCATION - Lat 32°42'47.86", long 92°20'26.75" referenced to North American Datum of 1983, Union Parish, LA, Hydrologic Unit 08040206, NW/4, NE/4, NW/4, Sec 23, T 20 N, R 1 E, located at north end of spillway.
DRAINAGE AREA - 1,607 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2009 to current year. Prior to October 2009, published as Bayou D'Arbonne Lake at Farmerville, LA (07366300) at same
datum.
GAGE - Water-stage recorder. Datum of gage is 40.40 ft above NGVD of 1929 (levels by Corps of Engineers).
REMARKS - Reservoir is formed by an earthfill dam containing a 799-ft uncontrolled concrete spillway at the left end. Capacity, 130,000 acre-ft at spillway crest, 39.60 ft. gage datum. There is no dead storage. Outflow below spillway crest controlled by four 5- by 5-ft sluice gates at outlet. Invert elevation of sluice gate at 17.6 ft gage datum. Dam complete and storage began in 1964. Reservoir is use for flood control, conservation, and recreation.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since 1925, 45.71 ft, April 30, 1958, (from Corps of Engineers records).
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 48.65 ft, March 11, 2016.
