H H Moore Dam Reservoir Report

Last Updated: December 5, 2025

H H Moore Dam, also known as Round Mt.


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Summary

Orchard Dam, is a private-owned structure located in Oconee, South Carolina. Designed by USDA NRCS and completed in 1985, this Earth-type dam serves primarily for irrigation purposes on the TR-Persimmon Branch. With a height of 37 feet and a length of 310 feet, the dam has a storage capacity of 33 acre-feet, providing essential water resources for the surrounding area.

Despite its low hazard potential, the dam's condition assessment is rated as poor, highlighting the need for maintenance and potential improvements. The last inspection in April 2017 revealed areas of concern, prompting a moderate risk assessment. The dam is regulated by the SC DHEC and undergoes regular state inspection and enforcement to ensure its structural integrity and safety.

For water resource and climate enthusiasts, H H Moore Dam presents an intriguing case study in the management of private-owned dams for irrigation purposes. Its location in a scenic area of South Carolina adds to its significance, making it a focal point for discussions on water conservation, infrastructure maintenance, and risk management in the face of changing climate conditions.

Year Completed

1985

Dam Length

310

Dam Height

37

River Or Stream

TR-PERSIMMON BRANCH

Primary Dam Type

Earth

Surface Area

2

Nid Storage

33

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

37
       
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.