Bayou Dupont No 15 Reservoir Report
Nearby: Bayou Dupont No 14 Bayou Dupont No 17
Last Updated: December 9, 2025
Bayou Dupont No 15, also known as Miller, is a private earth dam located in Natchitoches, Louisiana, designed by USDA NRCS and completed in 1959.
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Summary
The dam serves multiple purposes including flood risk reduction, fish and wildlife pond, and recreation. It has a structural height of 30 feet and a dam length of 696 feet, with a storage capacity of 309 acre-feet and a drainage area of 0.39 square miles.
The dam is regulated by the Louisiana Department of Transportation and Development, with state permitting, inspection, and enforcement in place. Its hazard potential is considered significant, with a fair condition assessment as of July 2020. The spillway type is uncontrolled with a width of 10 feet, and the dam has a moderate risk assessment rating. The surrounding area is at risk of moderate inundation in case of a dam failure, with emergency action plans potentially needing updates to meet guidelines.
Overall, Bayou Dupont No 15 is a vital infrastructure for flood risk reduction in the region, with careful monitoring and management required to ensure the safety of the surrounding communities. Water resource and climate enthusiasts will find this structure of interest due to its multi-purpose design and the potential risks associated with its operation in the face of changing environmental conditions.
Year Completed |
1959 |
Dam Length |
696 |
Dam Height |
25 |
River Or Stream |
TR-WINN CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
25 |
Drainage Area |
0.39 |
Nid Storage |
309 |
Structural Height |
30 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bayou Pierre Near Lake End
|
187cfs |
Bayou San Patricio Near Benson
|
0cfs |
Bayou Toro Near Toro
|
41cfs |
Sabine Rv At Toledo Bd Res Nr Burkeville
|
132cfs |
Bayou Grand Cane Near Stanley
|
5cfs |
Sabine Rv Nr Burkeville
|
204cfs |
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.
Bayou Dupont No 15