Longville Lake Reservoir Report
Last Updated: December 19, 2025
Longville Lake, located in Beauregard, Louisiana, is a private water resource primarily used for recreation.
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Summary
Constructed in 1950, this earth dam structure stands at a height of 10 feet and has a maximum storage capacity of 600 acre-feet. With a surface area of 100 acres and a drainage area of 2 square miles, Longville Lake offers a tranquil setting for water and climate enthusiasts to enjoy various outdoor activities.
Despite its recreational appeal, Longville Lake poses a high hazard potential with a poor condition assessment, indicating the need for maintenance and potential safety improvements. The dam features an uncontrolled spillway with a width of 100 feet, allowing for a maximum discharge of 1750 cubic feet per second. The structure's risk assessment is categorized as moderate, emphasizing the importance of implementing risk management measures to ensure the safety of the surrounding community and environment.
Overseen by the Louisiana Department of Transportation and Development, Longville Lake is subject to state regulations, inspections, and enforcement. The dam's location on Horse Branch, in close proximity to the city of Longville, makes it a vital water resource for the region. With its historical significance and recreational value, Longville Lake serves as a focal point for water resource and climate enthusiasts seeking to engage with nature in a picturesque setting.
Year Completed |
1950 |
Dam Length |
2300 |
Dam Height |
10 |
River Or Stream |
HORSE BRANCH |
Primary Dam Type |
Earth |
Surface Area |
100 |
Hydraulic Height |
7 |
Drainage Area |
2 |
Nid Storage |
600 |
Structural Height |
10 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bundick Ck Nr De Ridder
|
75cfs |
Calcasieu River Near Kinder
|
762cfs |
Whiskey Chitto Creek Near Oberlin
|
253cfs |
Sabine Rv Nr Bon Wier
|
777cfs |
Bayou Anacoco Near Rosepine
|
147cfs |
Calcasieu River Near Oberlin
|
91cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Longville Lake