Manassas Dam #1 Reservoir Report
Last Updated: January 12, 2026
Manassas Dam #1, located in Manassas, Virginia, is a vital water resource structure managed by the Norfolk District of the US Army Corps of Engineers.
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Summary
With a height of 10 feet and a storage capacity of 64.5 acre-feet, this dam plays a crucial role in water management and flood control in the region. Despite its undetermined hazard potential and not having a current condition rating, Manassas Dam #1 remains an essential piece of infrastructure for ensuring water supply reliability and protection against potential risks.
Although details such as the completion year and specific dam type are not listed, the significance of Manassas Dam #1 lies in its ability to store water and regulate flow, enhancing the resilience of the surrounding area to changing climatic conditions. While the dam's condition assessment is marked as "Not Rated," its emergency action plan preparedness and adherence to guidelines are not specified. The presence of emergency contacts and inundation maps, along with risk management measures, are pivotal in ensuring the safety and security of the community in case of any unforeseen events.
As water resource and climate enthusiasts, understanding the role of structures like Manassas Dam #1 is crucial in comprehending the interconnectedness of water management, infrastructure, and climate resilience. With the potential for future modifications and improvements, this dam serves as a reminder of the ongoing need for sustainable water resource management practices in the face of a changing climate. By staying informed and engaged with developments surrounding Manassas Dam #1, enthusiasts can contribute to the broader conversation on water security and climate adaptation efforts in the region and beyond.
Dam Height |
10 |
Surface Area |
16.1 |
Hydraulic Height |
10 |
Nid Storage |
64.5 |
Structural Height |
10 |
Hazard Potential |
Undetermined |
Nid Height |
10 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
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Outpost 60 Campsite
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Bull Run Regional Park
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Site 1
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Site 2
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Site 14
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Site 13
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Manassas Dam #1