R. Green Lake Dam Reservoir Report

Last Updated: December 6, 2025

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Summary

Green Lake Dam in Robbins, North Carolina, is a privately-owned earth dam primarily used for recreation purposes. Completed in 1960, this dam stands at a structural height of 25 feet with a hydraulic height of 22 feet, stretching 590 feet in length. It provides a storage capacity of 84 acre-feet, with a normal storage level of 70 acre-feet across its 12-acre surface area.

Managed by the North Carolina Dam Safety Program, R. Green Lake Dam is regulated, inspected, and enforced by state agencies to ensure its safety and compliance with guidelines. Despite its low hazard potential, the dam is assessed to be in fair condition as of May 2017. With a five-year inspection frequency, emergency action plans and risk assessments are yet to be prepared for this dam, highlighting the importance of ongoing monitoring and maintenance efforts.

Located along Mill Creek-Os, this dam offers recreational opportunities for the local community and visitors, serving as a picturesque spot in Moore County. With its rich history and significant role in water resource management, R. Green Lake Dam stands as a testament to the importance of maintaining infrastructure for both recreational and safety purposes in the face of changing climate conditions.

Year Completed

1960

Dam Length

590

River Or Stream

Mill Creek-Os

Primary Dam Type

Earth

Surface Area

12

Hydraulic Height

22

Nid Storage

84

Structural Height

25

Hazard Potential

Low

Nid Height

25
       
Seasonal Comparison

Weather Forecast

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.