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Amite River Basin at Bayou Manchac near Little Prairie

Highest listed crest 21.49 ftFlood stage 10.0 ft35 crests since 1989

The Amite River Basin at Bayou Manchac near Little Prairie crested at major flood stage 4 times among the 35 crests the National Weather Service lists from 1989 to 2021. The highest, 21.49 ft on August 15, 2016, was major flooding, 11.49 feet above flood stage.

The gauge

Highest listed crest
21.49 ft
August 15, 2016
Flood stage
10.0 ft
Major flooding from 16.0 ft
Crests at major
4
40th of 107 gauges in Louisiana
Most recent flood crest
May 23, 2021
11.51 ft, minor flooding
Location
Ascension Parish
Near St. George (6.7 mi), Gonzales (8.8 mi), Baton Rouge (14.6 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Amite River Basin at Bayou Manchac near Little Prairie
Action stage9.02Dec 20, 2009The level at which the NWS or its partners begin to take action
Flood stage (minor)10.016May 23, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage14.03Mar 14, 2016Some inundation of structures and roads near the stream
Major flood stage16.04Aug 15, 2016Extensive inundation of structures and roads

Every listed crest

35 crests from 1989 to 2021. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Amite River Basin at Bayou Manchac near Little Prairie, 1989 to 2021 510152025ft Flood stage 10.0 ftMajor 16.0 ft Jul 1, 1989: 8.11 ft, below flood stageJan 28, 1990: 16.83 ft, major floodingMay 12, 1991: 11.20 ft, minor floodingMar 8, 1992: 12.30 ft, minor floodingJan 23, 1993: 16.38 ft, major floodingJan 31, 1994: 14.42 ft, moderate floodingApr 14, 1995: 14.71 ft, moderate floodingDec 21, 1995: 11.32 ft, minor floodingFeb 28, 1997: 11.37 ft, minor floodingJan 10, 1998: 13.12 ft, minor floodingMar 17, 1999: 9.78 ft, action stageMar 6, 2001: 11.36 ft, minor floodingJun 10, 2001: 16.92 ft, major floodingApr 11, 2002: 8.14 ft, below flood stageFeb 25, 2003: 13.38 ft, minor floodingFeb 15, 2004: 10.70 ft, minor floodingMay 18, 2004: 12.18 ft, minor floodingSep 24, 2005: 8.84 ft, below flood stageApr 30, 2006: 6.94 ft, below flood stageOct 30, 2006: 8.79 ft, below flood stageSep 6, 2008: 13.36 ft, minor floodingMar 31, 2009: 11.03 ft, minor floodingDec 20, 2009: 9.54 ft, action stageMar 12, 2011: 8.45 ft, below flood stageSep 2, 2012: 10.76 ft, minor floodingJan 12, 2013: 12.54 ft, minor floodingFeb 6, 2014: 8.26 ft, below flood stageMar 5, 2015: 7.45 ft, below flood stageMar 14, 2016: 14.78 ft, moderate flooding; 5,928 cubic feet per secondAug 15, 2016: 21.49 ft, major floodingJan 23, 2017: 8.23 ft, below flood stageJan 30, 2018: 8.91 ft, below flood stageMay 13, 2019: 11.70 ft, minor flooding; 4,250 cubic feet per secondApr 8, 2021: 12.10 ft, minor floodingMay 23, 2021: 11.51 ft, minor flooding Highest, 21.49 ft, Aug 15, 2016 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Amite River Basin at Bayou Manchac near Little Prairie 1980s: 0 1990s: 9 9 2000s: 7 2010s: 5 2020s: 2 1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Amite River Basin at Bayou Manchac near Little Prairie
1Aug 15, 201621.49+11.49Major—
2Jun 10, 200116.92+6.92Major—
3Jan 28, 199016.83+6.83Major—
4Jan 23, 199316.38+6.38Major—
5Mar 14, 201614.78+4.78Moderate5,928
6Apr 14, 199514.71+4.71Moderate—
7Jan 31, 199414.42+4.42Moderate—
8Feb 25, 200313.38+3.38Minor—
9Sep 6, 200813.36+3.36Minor—
10Jan 10, 199813.12+3.12Minor—
11Jan 12, 201312.54+2.54Minor—
12Mar 8, 199212.30+2.30Minor—
13May 18, 200412.18+2.18Minor—
14Apr 8, 202112.10+2.10Minor—
15May 13, 201911.70+1.70Minor4,250
16May 23, 202111.51+1.51Minor—
17Feb 28, 199711.37+1.37Minor—
18Mar 6, 200111.36+1.36Minor—
19Dec 21, 199511.32+1.32Minor—
20May 12, 199111.20+1.20Minor—
21Mar 31, 200911.03+1.03Minor—
22Sep 2, 201210.76+0.76Minor—
23Feb 15, 200410.70+0.70Minor—
24Mar 17, 19999.78−0.22Action—
25Dec 20, 20099.54−0.46Action—
26Jan 30, 20188.91−1.09Below flood stage—
27Sep 24, 20058.84−1.16Below flood stage—
28Oct 30, 20068.79−1.21Below flood stage—
29Mar 12, 20118.45−1.55Below flood stage—
30Feb 6, 20148.26−1.74Below flood stage—
31Jan 23, 20178.23−1.77Below flood stage—
32Apr 11, 20028.14−1.86Below flood stage—
33Jul 1, 19898.11−1.89Below flood stage—
34Mar 5, 20157.45−2.55Below flood stage—
35Apr 30, 20066.94−3.06Below flood stage—

Other gauges in Ascension Parish

Flood gauges in Ascension Parish
Donaldsonville27.036.01 ft, May 15, 19273

Ascension Parish: every hazard · River floods across the country · Louisiana

NOAA National Water Prediction Service, gauge BMPL1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.