Gulf Coast Gauges

Bayou Manchac at Alligator Bayou near Kleinpeter water level

USGS gauge 07378746 · Ascension Parish · Baton Rouge · NWS gauge ABKL1

1.76 ft

gage height, Oct 23, 2026 at 3:00 PM CDT · 3 hours ago

Highest since 1998 (USGS)
15.62 ft (June 10, 2001)
Usual range
1.54 to 2.89 ft

USGS marks recent readings as provisional: they can be revised after review.

No National Weather Service alert covering Ascension Parish was active when this page was generated (Oct 23, 2026 at 5:50 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

1.5 2.2 2.9 Oct 17 Oct 18 Oct 19 Oct 20 Oct 21 Oct 22 Oct 23

Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.

How to read this gauge

Gage height is the height of the water surface above this gauge's own zero point, which sits at -0.50 ft NAVD88. It is not a water depth and not an elevation: add -0.50 ft to get the water surface elevation.

Daily highs and lows since September 11, 2026

1.2 2.3 3.4 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 1998

In 29 complete water years of comparable USGS records (since 1998), the highest peak was 15.62 ft on June 10, 2001. So far in water year 2027 (since October 1) the highest reading is 3.36 ft on October 10, 2026.

2 6 9 13 17 2000 2005 2010 2015 2020 2025 Water year 1998: 11.36 ft on January 12, 1998 Water year 1999: 7.94 ft on March 17, 1999 Water year 2000: 6.87 ft on October 9, 1999 Water year 2001: 15.62 ft on June 10, 2001 Water year 2002: 8.83 ft on July 8, 2002 Water year 2003: 10.60 ft on February 25, 2003 Water year 2004: 11.49 ft on May 18, 2004 Water year 2005: 10.47 ft on September 24, 2005 Water year 2006: 9.37 ft on April 30, 2006 Water year 2007: 9.84 ft on December 30, 2006 Water year 2008: 10.26 ft on September 7, 2008 Water year 2009: 9.20 ft on April 1, 2009 Water year 2010: 10.25 ft on December 18, 2009 Water year 2011: 8.65 ft on September 4, 2011 Water year 2012: 10.54 ft on September 1, 2012 Water year 2013: 13.12 ft on January 15, 2013 Water year 2014: 9.37 ft on February 26, 2014 Water year 2015: 8.20 ft on April 28, 2015 Water year 2016: 15.10 ft on August 15, 2016 Water year 2017: 8.71 ft on January 3, 2017 Water year 2018: 9.11 ft on January 27, 2018 Water year 2019: 11.26 ft on May 14, 2019 Water year 2020: 9.08 ft on July 6, 2020 Water year 2021: 14.37 ft on May 20, 2021 Water year 2022: 7.85 ft on October 1, 2021 Water year 2023: 10.08 ft on January 30, 2023 Water year 2024: 8.65 ft on January 27, 2024 Water year 2025: 7.41 ft on November 2, 2024 Water year 2026: 11.44 ft on May 12, 2026 Water year 2027 so far: 3.36 ft on October 10, 2026 2001 2016 2021

Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.

NWS historic crests

DateCrestAbove minor flood stage
August 15, 201615.13 ft—
June 5, 200110.14 ft—
March 3, 196610.00 ft—
December 23, 19619.44 ft—
January 21, 20139.43 ft—
December 20, 20099.18 ft—
December 21, 20099.18 ft—
April 26, 19739.03 ft—

The highest crests the National Weather Service lists for this gauge, as published. They can differ from the USGS annual peaks above: USGS records the year's highest gage height, which is not always the crest the NWS lists for the same flood.

Download the readings

bayou-manchac-at-alligator-bayou-near-kleinpeter.csv (CSV): every reading stored for this gauge since September 11, 2026, 3,986 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.

Source. Gage height from the U.S. Geological Survey. This site is not affiliated with either agency.