Reservoir Report

Louisiana

Last Updated: May 1, 2026

Nearby: Pennington Lake Highland Lakes

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Lake Murphy is a shallow lake located in Iberville Parish, Louisiana, close to Bayou Sorrel.

Summary

The lake's hydrology is primarily influenced by the Atchafalaya River and the Bayou Sorrel Canal. The Atchafalaya River provides the majority of the surface flow while the Bayou Sorrel Canal provides a secondary source of water. The lake's water level is also affected by precipitation, with snowpack providing a significant contribution during the winter months. In terms of history, the lake was created in the mid-20th century as part of a flood control project. Today, Lake Murphy is used primarily for agricultural purposes, such as rice farming, and fishing. Recreational activities are limited due to the lake's shallow depth and lack of amenities.

Regional Streamflow Levels

Bayou Teche At Adeline Bridge Near Jeanerette 517.0cfs	517cfs
Charenton Drainage Canal At Baldwin 7760.0cfs	7760cfs
Bayou Lafourche Sw Of Donaldsonville 511.0cfs	511cfs
Byu Lafourche @ Donaldsonville 505cfs	505cfs
Mississippi River At Baton Rouge 516000.0cfs	516000cfs
Wax Lake Outlet At Calumet 117000.0cfs	117000cfs

15-Day Long Term Forecast

Reservoir Details

Gage Height, Ft 24hr Change	0.85%
Percent of Normal	79%
Minimum	6.72 ft 2012-10-30
Maximum	23.45 ft 2011-05-28
Average	14 ft

Seasonal Comparison

Gage Height, Ft Levels

5-Day Hourly Forecast Detail

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.