Cox Lake Reservoir Report
Last Updated: December 5, 2025
Cox Lake, located in Randolph, North Carolina, is a captivating site for water resource and climate enthusiasts.
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Summary
This private hydroelectric facility, completed in 1918, boasts a concrete dam with a height of 26 feet and a hydraulic height of 23 feet, providing a storage capacity of 487 acre-feet. The dam spans 361.5 feet in length and has a spillway width of 280 feet, allowing for a maximum discharge of 50,200 cubic feet per second from the adjacent Deep River.
Managed by the Federal Energy Regulatory Commission, Cox Lake presents a significant hazard potential with a moderate risk assessment rating. Despite its age, the dam has been inspected regularly, with the last assessment in September 2020. The facility operates without state regulation but undergoes federal inspections to ensure its structural integrity and safety measures are up to standard. With its historical significance and importance in generating hydroelectric power, Cox Lake stands as a testament to the enduring impact of water resources in the region.
Surrounded by picturesque landscapes and serving as a vital component in the local water infrastructure, Cox Lake offers a glimpse into the intersection of human ingenuity and environmental stewardship. Whether exploring its multi-arch core design or contemplating its role in mitigating flood risks, this site is a must-visit for those passionate about water resource management and climate resilience. Cox Lake remains a shining example of how innovation and conservation can coexist harmoniously in the pursuit of sustainable energy solutions.
Year Completed |
1918 |
Dam Length |
361.5 |
Dam Height |
26 |
River Or Stream |
Deep River |
Primary Dam Type |
Concrete |
Surface Area |
52 |
Hydraulic Height |
23 |
Drainage Area |
253 |
Nid Storage |
487 |
Structural Height |
28 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
28 |
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.
Cox Lake