Moon Lake Dam Reservoir Report

Last Updated: December 6, 2025

Moon Lake Dam is a private dam located in Greenville, South Carolina, along the TR-SOUTH TYGER RIVER.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1969, this earth dam stands at a height of 22 feet and has a storage capacity of 74 acre-feet, primarily serving purposes such as fire protection, stock, and a small fish pond. However, recent data indicates that the dam is classified as having a high hazard potential with an unsatisfactory condition assessment.

Managed by the South Carolina Department of Health and Environmental Control (SC DHEC), Moon Lake Dam is subject to state regulation, permitting, inspection, and enforcement. Despite its recreational uses and close proximity to the local community, the dam's condition raises concerns for potential risks and safety measures. With the dam's hazard potential and condition assessment in mind, ongoing monitoring and maintenance are crucial to ensure the safety of the surrounding area and the integrity of the structure.

For water resource and climate enthusiasts, Moon Lake Dam serves as a notable structure in the region, highlighting the importance of proper dam management and safety protocols. As the dam continues to be monitored and assessed, its impact on the local ecosystem and water resources remains a topic of interest and concern. Further attention to risk management measures and emergency preparedness is essential to mitigate potential hazards and ensure the sustainable use of this vital water resource infrastructure.

Year Completed

1969

Dam Length

245

Dam Height

22

River Or Stream

TR-SOUTH TYGER RIVER

Primary Dam Type

Earth

Surface Area

7

Nid Storage

74

Hazard Potential

High

Foundations

Soil

Nid Height

22
       
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.