Mississippi River at Donaldsonville water level
U.S. Army Corps of Engineers gauge 01220 · NWS DONL4 · Ascension Parish · Baton Rouge
stage, NGVD29 · Oct 27, 2026 at 1:00 PM CDT · 2 hours ago
- Below NWS minor flood stage
- 21.4 ft
- NWS action stage
- 25.0 ft
- NWS minor flood stage
- 27.0 ft
- NWS moderate flood stage
- 30.0 ft
- NWS major flood stage
- 34.0 ft
- Usual range
- 3.42 to 15.52 ft
- Highest since September 30, 2025
- 18.02 ft
Last 7 days
Hourly averages of the Corps' readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 30, 2025.
How to read this gauge
The number is the water surface elevation in feet on NGVD29, an older national vertical datum (NGVD29 and NAVD88 heights differ by an amount that varies from place to place): a height above a fixed survey reference, not a depth. Readings on different datums can't be compared directly.
The flood stages are the National Weather Service's references for this location, on the same scale as the reading. They describe the gauge, not any particular street or property.
Daily highs and lows since September 30, 2025
Other Corps gauges in Baton Rouge
| Corps gauge | Stage | Datum | NWS flood stage | Updated |
|---|---|---|---|---|
| Big Alabama Bayou (FWS) at Sherburne | 9.79 ft | NGVD29 | — | 2 hours ago |
| EABPL Borrow Pit (FWS) near Ramah | 4.52 ft | NGVD29 | — | 2 hours ago |
| Mississippi River at Baton Rouge | 9.80 ft | NGVD29 | 25.2 ft below minor flood stage | 3 hours ago |
| Upper Grand River (LS) at Dike | 2.78 ft | NGVD29 | — | 2 hours ago |
| Workman Canal near I-10 | 6.46 ft | NGVD29 | — | 3 hours ago |
Download the readings
mississippi-river-at-donaldsonville.csv (CSV): every reading from the last 90 days, 2,159 rows, with time in UTC and Central, and stage in feet on NGVD29.
mississippi-river-at-donaldsonville-daily.csv (CSV): the low and high of every day since September 30, 2025.
Source. Stage and flood-fight phases from the U.S. Army Corps of Engineers, New Orleans District; flood stages from the National Weather Service. Recent readings are provisional and can be revised. This site is not affiliated with either.