Blair Dam Reservoir Report
Nearby: Owen House Pond Dam Shelhorse Dam
Last Updated: December 7, 2025
Blair Dam, located in Pittsylvania, Virginia, is a privately-owned earth dam with a height of 24 feet and a length of 480 feet.
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Summary
It regulates a tributary to Pig River and has a storage capacity of 153 acre-feet, with a normal storage level of 109 acre-feet. The dam is under state regulation and jurisdiction, with the Department of Conservation and Recreation overseeing permitting, inspection, and enforcement.
Although the hazard potential of Blair Dam is currently undetermined and its condition is not rated, the dam's emergency action plan status, risk assessment, and risk management measures are all either unknown or not available. The dam has not been modified in recent years, and its last inspection date, condition assessment date, and emergency action plan preparation status are all unspecified. Despite these gaps in information, Blair Dam remains a significant structure for water resource management in the area.
Enthusiasts interested in water resources and climate in Virginia may find Blair Dam to be an intriguing case study due to its private ownership, state regulation, and location within the Norfolk District of the US Army Corps of Engineers. With its varying storage capacities, proximity to Pig River, and potential impact on the surrounding area, Blair Dam presents an opportunity for further research and analysis in understanding the role of dams in water resource management and climate resilience efforts.
Dam Length |
480 |
Dam Height |
24 |
River Or Stream |
Trib to Pig River |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
24 |
Nid Storage |
153 |
Structural Height |
24 |
Hazard Potential |
Undetermined |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pigg River Near Sandy Level
|
112cfs |
Roanoke River At Altavista
|
618cfs |
Goose Creek Near Huddleston
|
56cfs |
Big Otter River Near Evington
|
101cfs |
Sandy River Near Danville
|
40cfs |
Blackwater River Near Rocky Mount
|
56cfs |
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.
Blair Dam