William Dyess Dam Reservoir Report
Nearby: Bayou Dupont No 8 Bayou Dupont No 9
Last Updated: February 5, 2026
Nestled in Natchitoches, Louisiana, the William Dyess Dam stands as a testament to responsible water resource management and climate resilience.
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Summary
Owned privately, this dam is regulated by the Louisiana Department of Transportation and Development, ensuring its safety and adherence to state regulations. With a primary purpose of recreation, this earth dam spans 570 feet in length, holding a maximum storage capacity of 118 acre-feet.
Despite its low hazard potential and fair condition assessment, the William Dyess Dam remains a vital structure in the region, providing water storage and flood control along the TR-Bayou Dupont river. With an uncontrolled spillway and a moderate risk assessment rating, this dam serves as a crucial asset for the community's water resource management efforts. As water resource and climate enthusiasts, the William Dyess Dam is a fascinating example of sustainable infrastructure that balances human needs with environmental protection.
Dam Length |
570 |
Dam Height |
10 |
River Or Stream |
TR-BAYOU DUPONT |
Primary Dam Type |
Earth |
Surface Area |
12 |
Nid Storage |
118 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Hourly Weather Forecast
Nearby Streamflow Levels
Bayou Pierre Near Lake End
|
435cfs |
Bayou San Patricio Near Benson
|
61cfs |
Bayou Toro Near Toro
|
47cfs |
Bayou Grand Cane Near Stanley
|
0cfs |
Sabine Rv At Toledo Bd Res Nr Burkeville
|
199cfs |
Saline Bayou Near Lucky
|
158cfs |
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.
William Dyess Dam