Bayou Dupont No 9 Reservoir Report
Nearby: Lacy Lake Dam William Dyess Dam
Last Updated: December 7, 2025
Located in the picturesque city of Shamrock, Louisiana, Bayou Dupont No 9 is a privately-owned earth dam designed by the USDA NRCS for flood risk reduction along the TR-Bayou Dupont.
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Summary
Completed in 1959, this dam stands at a height of 22 feet and spans a length of 1440 feet, with a maximum storage capacity of 658 acre-feet and a normal storage capacity of 215 acre-feet. With a surface area of 36 acres and a drainage area of 0.94 square miles, Bayou Dupont No 9 plays a crucial role in managing water resources in the region.
Beyond flood risk reduction, Bayou Dupont No 9 also serves multiple purposes including fish and wildlife pond creation, recreation, and enhancing the overall ecological landscape. The dam's spillway type is uncontrolled, with a width of 12 feet, allowing excess water to safely discharge when needed. Despite its fair condition assessment as of July 2020, the dam poses a significant hazard potential, prompting regular inspections every three years to ensure its structural integrity and safety. With the dam's associated risk assessed as moderate, it underscores the importance of ongoing risk management measures to safeguard the surrounding communities and environment.
As part of the Fort Worth District in Louisiana, Bayou Dupont No 9 is a vital infrastructure maintained by the LA DOTD, with state-regulated permitting, inspection, and enforcement in place to uphold its operational standards. The dam's strategic location at S6,T8N,R9WANDS31,T9N,R9W not only mitigates flood risks but also supports the region's water conservation efforts. For water resource and climate enthusiasts, Bayou Dupont No 9 stands as a testament to collaborative efforts between private owners, government agencies, and environmental stewards in safeguarding water resources and enhancing ecological sustainability in Natchitoches County.
Year Completed |
1959 |
Dam Length |
1440 |
Dam Height |
22 |
River Or Stream |
TR-BAYOU DUPONT |
Primary Dam Type |
Earth |
Surface Area |
36 |
Hydraulic Height |
22 |
Drainage Area |
0.94 |
Nid Storage |
658 |
Structural Height |
28 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
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Nearby Streamflow Levels
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 9