Columbia Diversion Dam Reservoir Report
Last Updated: December 13, 2025
The Columbia Diversion Dam, located in Columbia, South Carolina, was completed in 1882 and serves as a vital structure for hydroelectric power generation and water supply purposes.
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Summary
This timber crib dam, with a height of 18 feet and a length of 1020 feet, harnesses the power of the Broad River to provide storage capacity of 800 acre-feet and a maximum discharge rate of 28,000 cubic feet per second. The dam's uncontrolled spillway, with a width of 1000 feet, helps manage water flow during periods of high demand or heavy rainfall.
Managed by the Federal Energy Regulatory Commission, the Columbia Diversion Dam poses a significant hazard potential due to its age and condition, which is currently not available for assessment. Despite being a multi-arch dam built on a rock foundation, the dam's risk is categorized as moderate, with a designated emergency action plan in place for potential threats. With two outlet gates and associated structures, the dam plays a crucial role in the region's water resource management and climate resilience efforts.
As a key component of the Savannah District of the US Army Corps of Engineers, the Columbia Diversion Dam stands as a testament to the intersection of human engineering and natural resources. With its historical significance and ongoing role in power generation and water supply, this dam continues to be a focal point for water resource and climate enthusiasts seeking to understand the complexities of managing water infrastructure in an ever-changing environment.
Year Completed |
1882 |
Dam Length |
1020 |
Dam Height |
14 |
River Or Stream |
Broad |
Primary Dam Type |
Timber Crib |
Surface Area |
265 |
Hydraulic Height |
14 |
Drainage Area |
5330 |
Nid Storage |
800 |
Structural Height |
18 |
Outlet Gates |
Tainter (radial) - 2 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Saluda River Near Columbia
|
907cfs |
Smith Branch At North Main St At Columbia
|
3cfs |
Congaree River At Columbia
|
3010cfs |
Gills Creek At Columbia
|
37cfs |
Saluda River Below Lk Murray Dam Nr Columbia
|
790cfs |
Broad River At Alston
|
1880cfs |
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.
Columbia Diversion Dam