Lower Weir Lake Dam Reservoir Report
Last Updated: December 25, 2025
Lower Weir Lake Dam, located in East Baton Rouge, Louisiana, is a private dam primarily used for fish and wildlife pond purposes.
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Summary
Constructed in 1985, this earth-type dam stands at 15 feet in height and spans 630 feet in length, with a normal storage capacity of 200 acre-feet. The dam sits on the Amite River and is regulated by the Louisiana Department of Transportation and Development, with state permitting, inspection, and enforcement in place to ensure its safety.
Despite its low hazard potential, Lower Weir Lake Dam has been assessed as being in poor condition as of February 2019. With an inspection frequency of 5 years, the dam poses a moderate risk according to a risk assessment rating of 3. The spillway of the dam is uncontrolled and has a width of 60 feet, allowing for the release of excess water. While the dam does not have a designated emergency action plan prepared, it serves as a vital resource for the surrounding wildlife and recreation in the area.
Enthusiasts of water resources and climate will find Lower Weir Lake Dam to be a fascinating structure that plays a crucial role in supporting local fish and wildlife populations. Its presence on the Amite River, coupled with its regulatory oversight and risk assessment, highlights the importance of maintaining and monitoring dams to ensure the safety of both the environment and surrounding communities.
Year Completed |
1985 |
Dam Length |
630 |
Dam Height |
15 |
River Or Stream |
AMITE RIVER |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
8 |
Drainage Area |
2 |
Nid Storage |
375 |
Structural Height |
15 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Amite River Near Denham Springs
|
587cfs |
Amite River At Port Vincent
|
1070cfs |
Comite River Near Comite
|
142cfs |
Mississippi River At Baton Rouge
|
134000cfs |
Tickfaw River At Holden
|
176cfs |
Byu Lafourche @ Donaldsonville
|
505cfs |
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.
Lower Weir Lake Dam