Mountain Run Dam #50 Reservoir Report
Nearby: Gallo Dam Mountain Run Dam #18
Last Updated: December 5, 2025
Mountain Run Dam #50, also known as Lake Pelham, is a vital water resource structure located in Culpeper, Virginia.
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Summary
Owned by the local government and regulated by the Department of Conservation and Recreation, this earth dam stands at a height of 55 feet and spans 868.1 feet in length. With a storage capacity of 10,706.7 acre-feet and a primary purpose of flood risk reduction, the dam plays a crucial role in protecting the surrounding areas from potential inundation.
Despite its high hazard potential, Mountain Run Dam #50 is in satisfactory condition as of the last assessment in June 2019. The dam also serves recreational and water supply purposes, offering a surface area of 250.4 acres for outdoor activities. Overlooking the scenic Mountain Run, this structure is a focal point for water resource and climate enthusiasts who appreciate its engineering marvel and environmental significance.
As a key component of the flood risk reduction infrastructure in the region, Mountain Run Dam #50 provides a sense of security to the local community while also offering opportunities for leisure and water supply. With regular inspections and a comprehensive emergency action plan, the dam stands ready to meet the challenges of climate change and ensure the sustainable management of water resources in Culpeper, Virginia.
Dam Length |
868.1 |
Dam Height |
55 |
River Or Stream |
Mountain Run |
Primary Dam Type |
Earth |
Surface Area |
250.4 |
Drainage Area |
26.17 |
Nid Storage |
10706.7 |
Hazard Potential |
High |
Nid Height |
55 |
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.
Mountain Run Dam #50