Upper Swm Pond @ Mountain Run Reservoir Report
Last Updated: December 21, 2025
Upper Swm Pond @ Mountain Run is a privately owned dam located in Hanover, Virginia, designed for flood risk reduction along Neds Creek.
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Summary
The dam is classified as an Earth dam with a height of 25 feet and a length of 640 feet, providing a storage capacity of 169 acre-feet. The dam has a surface area of 13.4 acres and drains a watershed area of 0.62 square miles.
Despite its low hazard potential, Upper Swm Pond @ Mountain Run is regularly inspected and maintained to ensure its structural integrity and safety. The last inspection in April 2018 found the dam to be in satisfactory condition, meeting all regulatory guidelines set by the Department of Conservation and Recreation. The dam's Emergency Action Plan (EAP) was last revised in September 2006, showing a commitment to preparedness and risk management.
Water resource and climate enthusiasts will appreciate the essential role that Upper Swm Pond @ Mountain Run plays in mitigating flood risks in the region and its adherence to state regulatory standards. The dam serves as a vital infrastructure for protecting against potential flooding events and showcases the importance of proper maintenance and monitoring to ensure the safety of surrounding communities and the environment.
Dam Length |
640 |
Dam Height |
25 |
River Or Stream |
Neds Creek |
Primary Dam Type |
Earth |
Surface Area |
13.4 |
Hydraulic Height |
25 |
Drainage Area |
0.62 |
Nid Storage |
169 |
Structural Height |
25 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Upper Swm Pond @ Mountain Run