South Bay Dike Reservoir Report
Last Updated: December 5, 2025
South Bay Dike, located in Columbus, North Carolina, serves as a critical structure along the Cape Fear River to manage water resources in the region.
°F
°F
mph
Wind
%
Humidity
Summary
This private-owned earth dam, standing at a structural height of 24 feet and a hydraulic height of 22 feet, plays a crucial role in flood control and water storage. With a storage capacity of 2700 acre-feet and a drainage area of 180 acres, the dam provides vital protection to the surrounding areas during heavy rainfall and storms.
Maintained and regulated by the North Carolina Dam Safety Program, South Bay Dike is classified as having a high hazard potential but is currently in satisfactory condition as of the last assessment in September 2018. Although the dam has not been modified since its construction, regular inspections are conducted every two years to ensure its continued safety and effectiveness. Additionally, emergency action plans are in place to address any potential risks and to coordinate response efforts in case of an unforeseen event.
South Bay Dike stands as a significant infrastructure for water resource and climate enthusiasts, showcasing the intersection of human ingenuity and environmental stewardship in managing water resources effectively. As a key component in the region's water management system, this dam plays a crucial role in safeguarding communities and preserving the natural balance of the Cape Fear River watershed. With its strategic location and structural design, South Bay Dike exemplifies the importance of proactive dam safety practices in ensuring the sustainable management of water resources for future generations.
Dam Length |
6850 |
River Or Stream |
Cape Fear River |
Primary Dam Type |
Earth |
Surface Area |
180 |
Hydraulic Height |
22 |
Drainage Area |
180 |
Nid Storage |
2700 |
Structural Height |
24 |
Hazard Potential |
High |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cape Fear R At Lock #1 Nr Kelly
|
2420cfs |
Waccamaw River At Freeland
|
176cfs |
Black River Near Tomahawk
|
668cfs |
Northeast Cape Fear River Near Chinquapin
|
549cfs |
Waccamaw River Near Longs
|
174cfs |
Lumber River At Boardman
|
814cfs |
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.
South Bay Dike