Green Hill Lake Dam Reservoir Report

Last Updated: December 5, 2025

Green Hill Lake Dam, located in Mount Airy, North Carolina, is a privately-owned structure that serves primarily for recreation.


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Summary

Completed in 1955, this earth dam stands at a hydraulic height of 36 feet and a structural height of 42 feet, with a length of 680 feet. The dam has a maximum storage capacity of 242 acre-feet, providing a surface area of 11 acres and serving a drainage area of 385 acres.

Despite being regulated by the North Carolina Dam Safety Program and subject to regular inspections, the dam is classified as having a high hazard potential. However, its condition assessment as of December 2020 was deemed fair. The dam's emergency action plan status and risk assessment measures were not provided in the data. The surrounding Lovills Creek-Tr river/stream system and its associated structures are not impacted by the dam, which is situated within the jurisdiction of the state and subject to state permitting, inspection, and enforcement.

Water resource and climate enthusiasts interested in Green Hill Lake Dam will find its historical significance and recreational purpose intriguing. The dam's location in the heart of Surry County, North Carolina, provides opportunities for outdoor activities and water-based recreation. Its capacity to store and regulate water flow in the Lovills Creek-Tr watershed, while under state regulation and inspection, highlights the importance of proper dam management and safety measures in mitigating potential risks to the surrounding community and environment.

Year Completed

1955

Dam Length

680

River Or Stream

Lovills Creek-Tr

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

36

Drainage Area

385

Nid Storage

242

Structural Height

42

Hazard Potential

High

Nid Height

42
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.