Mcmillen Upper Pond Dam Reservoir Report
Last Updated: December 5, 2025
Mcmillen Upper Pond Dam, also known as Laverne Mcmillan Dam 1, is a privately owned structure located in Marion, South Carolina.
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Summary
Completed in 1964, this earth dam stands at a height of 9 feet and stretches 750 feet in length, with a primary purpose of providing recreational opportunities. The dam holds a storage capacity of 50 acre-feet, with a normal storage of 26 acre-feet over a surface area of 10 acres.
Despite its low hazard potential, the dam's condition assessment in 2017 revealed poor conditions, prompting the need for further inspection and potential maintenance. The risk assessment for Mcmillen Upper Pond Dam is classified as moderate, indicating a level of concern that requires ongoing monitoring and management measures. While the dam is state-regulated and permitted, its maintenance and upkeep are essential to ensure the safety of surrounding communities and the sustainability of the water resources in the area.
Year Completed |
1964 |
Dam Length |
750 |
Dam Height |
9 |
River Or Stream |
TR-BROWN SWAMP |
Primary Dam Type |
Earth |
Surface Area |
10 |
Nid Storage |
50 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Pee Dee R. At Galivants Ferry
|
1370cfs |
Pee Dee River Below Pee Dee
|
3250cfs |
Pee Dee River At Peedee
|
3290cfs |
Lumber River At Boardman
|
814cfs |
Waccamaw River At Conway Marina At Conway
|
2260cfs |
Black Creek Near Quinby
|
350cfs |
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.
Mcmillen Upper Pond Dam