Gregory Lake Dam Reservoir Report
Nearby: Baker Lake Dam Thornton Creek Dam
Last Updated: December 5, 2025
Gregory Lake Dam, located in Erwin, North Carolina, is a privately-owned structure that serves multiple purposes including irrigation, recreation, and water supply.
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Summary
Built in 1962, this earth dam stands at a structural height of 25 feet and has a hydraulic height of 21 feet. The dam spans a length of 540 feet and holds a maximum storage capacity of 131 acre-feet, with a normal storage of 109 acre-feet.
The dam, situated on Thorton Creek, is regulated by the North Carolina Department of Environmental Quality's Dam Safety Program, ensuring that it meets safety standards and undergoes regular inspections. The hazard potential of the dam is categorized as low, with a fair condition assessment as of the last inspection in February 2021. While the dam does not have an Emergency Action Plan prepared, it is equipped with emergency contacts and has a moderate inspection frequency of 5 years.
Overall, Gregory Lake Dam serves as a vital resource for the surrounding area, providing water for irrigation and recreational activities. With its low hazard potential and fair condition, the dam continues to play a crucial role in water management and conservation efforts in Harnett County, North Carolina.
Year Completed |
1962 |
Dam Length |
540 |
River Or Stream |
Thorton Creek |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
21 |
Drainage Area |
38 |
Nid Storage |
131 |
Structural Height |
25 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cape Fear River At Lillington
|
711cfs |
Middle Creek Near Clayton
|
54cfs |
Buckhorn Creek Nr Corinth
|
49cfs |
Swift Creek Near Mccullars Crossroads
|
7cfs |
Little River At Manchester
|
263cfs |
Swift Creek Near Apex
|
9cfs |
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.
Gregory Lake Dam