W B Manuel Dam Reservoir Report
Last Updated: December 5, 2025
W B Manuel Dam, located in Allendale, South Carolina, is a privately owned structure primarily used for irrigation purposes along the TR-MILLER SWAMP.
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Summary
The dam stands at a height of 15 feet and spans a length of 400 feet, with a storage capacity of 74 acre-feet. Despite its crucial role in supporting irrigation activities, the dam is classified as having a high hazard potential and poor condition assessment, indicating potential risks that need to be addressed.
Managed by the South Carolina Department of Health and Environmental Control, the dam's regulatory and inspection processes are in place to ensure its safety and compliance with state regulations. The dam's emergency action plan status and risk management measures are currently under evaluation, highlighting the importance of proactive measures to mitigate potential hazards. With its location in a region prone to moderate risk factors, such as flooding, the W B Manuel Dam serves as a critical infrastructure that requires continuous monitoring and maintenance to safeguard water resources and surrounding communities.
As an earth dam with a buttress core type, the W B Manuel Dam not only provides irrigation support but also offers recreational opportunities. However, its outdated infrastructure and poor condition underscore the need for ongoing assessments and potential upgrades to enhance its safety and operational efficiency. With its vital role in water resource management and climate resilience, the W B Manuel Dam serves as a focal point for stakeholders and enthusiasts interested in sustainable water infrastructure development and climate adaptation efforts in the region.
Dam Length |
400 |
Dam Height |
15 |
River Or Stream |
TR-MILLER SWAMP |
Primary Dam Type |
Earth |
Surface Area |
5 |
Nid Storage |
74 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
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.
W B Manuel Dam