Lower Swm Pond @ Mountain Run Reservoir Report
Last Updated: December 21, 2025
Lower Swm Pond @ Mountain Run in Hanover, Virginia, is a privately owned water resource managed by the Department of Conservation and Recreation.
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Summary
This earth dam structure on Neds Creek serves the primary purpose of flood risk reduction, with a storage capacity of 108.7 acre-feet and a surface area of 6.1 acres. The dam stands at 37 feet high with a length of 380 feet, providing essential protection for the surrounding area.
Despite being classified as having an undetermined hazard potential and not rated for condition assessment, Lower Swm Pond @ Mountain Run plays a crucial role in managing water flow and reducing flood risks in the region. The emergency action plan for the dam was last revised in 2006, highlighting the importance of preparedness and safety measures. With a drainage area of 0.74 square miles, this water resource serves as a vital component of the local ecosystem and contributes to the overall water management efforts in the area.
Enthusiasts of water resources and climate will appreciate the strategic placement and design of Lower Swm Pond @ Mountain Run, which demonstrates the collaboration between private ownership and state regulatory agencies for effective water management. As climate change continues to impact the frequency and intensity of floods, structures like this earth dam play a critical role in safeguarding communities and infrastructure against potential disasters. By staying informed and actively involved in monitoring and maintaining such water resources, enthusiasts can contribute to the resilience and sustainability of their local environment.
Dam Length |
380 |
Dam Height |
37 |
River Or Stream |
Neds Creek |
Primary Dam Type |
Earth |
Surface Area |
6.1 |
Hydraulic Height |
37 |
Drainage Area |
0.74 |
Nid Storage |
108.7 |
Structural Height |
37 |
Hazard Potential |
Undetermined |
Nid Height |
37 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Lower Swm Pond @ Mountain Run