USGS Water-Year Summary 2021
07380101 BAYOU MANCHAC NEAR LITTLE PRAIRIE, LA
LOCATION - Lat 30°20'25", long 90°55'02" referenced to North American Datum of 1927, Ascension Parish, LA, Hydrologic Unit 08070202, 4.6 mi northwest of Port Vincent, and 3.0 mi downstream from Clay Cut Bayou, on the right bank 1,000 ft upstream from mouth of Muddy Creek.
DRAINAGE AREA - 152 mi².
PERIOD OF RECORD - June 1989 to current year.
GAGE - Water-stage recorder. Datum of gage is 1.28 feet below NAVD88 GEOID12B EPOCH 2010.0000
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 21.49 ft (from high watermark), August 15, 2016.