Grand Bayou Reservoir lake and shoreline

Grand Bayou Reservoir Water Level

Louisiana

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Grand Bayou Reservoir

Grand Bayou Reservoir is currently 5.4 feet below full pool, with a water-surface elevation of 133.6 feet.

133.61 ft · Updated 4 hours ago · U.S. Geological Survey

Current level

133.61ft

−5.39 ft vs full pool

Low

Vs full pool

Since last reading

Down 0.01 ft

Previous readingNov 8133.62 ft

7-day change

Up 0.10 ft

7-day trend: Rising

8 daily readings in the last 7 days

30-day change

Down 0.19 ft

30 daily readings in the last 30 days

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Water Level History

Current
133.61 ft
24h
-0.01 ft
7d
+0.10 ft
30d
-0.19 ft

Elevation (ft) NGVD29 · MSL

Reference line is designed full pool.

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Lake Level Context

Level remains below the full pool

Grand Bayou Reservoir is currently 133.61 ft, 5.39 ft below its full pool. The lake has risen 0.10 ft over the past 7 days and fallen 0.19 ft over the past 30 days.

Grand Bayou Reservoir Level Details

Reference elevations, recent daily readings, data sources, and answers to common questions.

Conditions & Reference

Level status

5.39 ft below full pool

Current level
133.61 ft
Full pool
139 ft
DatumElevation referenced to National Geodetic Vertical Datum of 1929.
NGVD29
Elevation reference
MSL
Source
USGS

Reference levels

  • Full pool139 ft

Surrounding county drought

Extreme Drought

100% of surrounding county in official drought (D1–D4).

Severity

NoneExtreme
Trend
Stable

Surrounding county drought

Red River Parish County, LA

Extreme Drought

Extreme Drought. The largest share of Red River Parish County, LA is in Extreme Drought (D3), an official USDM drought category. These figures describe the surrounding county from the lake location, not the lake itself.. Trend: Stable compared with last week. Official drought (D1–D4) yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought (D1–D4)

Yes

100% of the surrounding county is in official drought categories (D1–D4). Dominant category remains Extreme Drought.

Typical county impacts (USDM guidance)

  • Significantly reduced streamflows in the surrounding county
  • Dry vegetation and elevated wildfire risk for the area
  • Nearby water-use restrictions may apply

U.S. Drought Monitor · map date Nov 3, 2026. Updated weekly. Official drought means U.S. Drought Monitor categories D1–D4 (Moderate through Exceptional). Abnormally Dry (D0) is not counted as official drought. droughtmonitor.unl.eduView drought map for Red River Parish County, LA

Daily level summary

DateLevelChange
Nov 9, 2026133.61-0.01
Nov 8, 2026133.620
Nov 7, 2026133.62-0.02
Nov 6, 2026133.64-0.02
Nov 5, 2026133.66+0.01
Nov 4, 2026133.65+0.11
Nov 3, 2026133.54+0.03

Common questions about Grand Bayou Reservoir’s water level

  • The current water level at Grand Bayou Reservoir is 133.61 ft (updated 4 hours ago). You can track the Grand Bayou Reservoir lake level on the interactive chart and daily history above.

  • Full pool for Grand Bayou Reservoir is 139 ft — the normal conservation target elevation when the reservoir is at its designed summer or operating pool.

  • The current 7-day trend for the Grand Bayou Reservoir lake level is rising — rising about 0.10 ft over the past week. See the history chart above for the full picture.

  • Based on the latest gauge reading, Grand Bayou Reservoir is currently 5.39 ft below full pool.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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