Siler City Water Supply Dam Reservoir Report
Last Updated: December 13, 2025
The Siler City Water Supply Dam, located in Chatham County, North Carolina, serves as a vital resource for both water supply and recreational purposes.
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Summary
Completed in 1953, this earth dam stands at a height of 20 feet with a hydraulic height of 17 feet, providing a storage capacity of 70 acre-feet. The dam is situated on the Rocky River-Tr and covers a surface area of 12 acres within a drainage area of 34,176 acres.
With a primary purpose of recreation, the Siler City Water Supply Dam offers opportunities for outdoor activities such as fishing, boating, and picnicking in a picturesque setting. Despite its fair condition assessment and high hazard potential, the dam is regulated, inspected, and enforced by state agencies including the NC Department of Environmental Quality Dam Safety Program. The dam's last inspection in October 2017 indicated a need for continued monitoring and maintenance to ensure the safety and integrity of the structure for both water supply and recreational users.
As a key component of the local government's water supply infrastructure, the Siler City Water Supply Dam plays a crucial role in meeting the community's water needs while also providing a venue for outdoor recreation. With its historical significance dating back to the 1950s, the dam remains a valuable asset that requires ongoing attention and management to mitigate risks and ensure its continued functionality for future generations of water resource and climate enthusiasts.
Year Completed |
1953 |
Dam Length |
300 |
River Or Stream |
Rocky River-Tr |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
17 |
Drainage Area |
34176 |
Nid Storage |
70 |
Structural Height |
20 |
Hazard Potential |
High |
Nid Height |
20 |
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.
Siler City Water Supply Dam