Mermentau River

Streamflow Hydrology Weather


Mermentau River Levels

March 28 2024

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Mermentau River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Mermentau River, the highest being situated at an altitude of ft, the .


About the mermentau river


The Mermentau River is a 72-mile-long waterway located in southwestern Louisiana. It was named after the Mermentau Native American tribe. The river has a rich history dating back to the early 1800s when it was used as a primary transportation route for goods such as rice and sugar. The river is fed by several tributaries and is known for its diverse ecosystem, which includes cypress trees, alligators, and bald eagles. The river is also home to several reservoirs and dams, including the Mermentau River Dam and the Bayou Plaquemine Brule Ridge Reservoir. These dams help to control water flow and provide recreational activities such as fishing, boating, and camping. The river also plays an important role in agriculture, providing irrigation for crops such as rice and corn.

Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Mermentau River At Mermentau
USGS 08012150
1490 cfs 2.72 ft -51.15

Peak Annual Discharge

Mermentau River Maximum Total Discharge

Seasonal Comparison

Mermentau River Year Over Year Discharge


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