Gregory Dam Reservoir Report
Nearby: Atkinson Dam Elkhorn Dam
Last Updated: December 22, 2025
Gregory Dam, located in Pittsylvania, Virginia, is a privately owned structure that serves the primary purpose of irrigation.
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Summary
The dam, constructed as an earth type structure, stands at a height of 29 feet and stretches 435 feet in length. It impounds an unnamed tributary to John's Run, providing a storage capacity of 70 acre-feet for water resource management.
Managed and regulated by the Department of Conservation and Recreation in Virginia, Gregory Dam's hazard potential remains undetermined, with a current condition assessment of "Not Rated." Despite lacking specific data on inspection frequency and emergency preparedness measures, the dam plays a crucial role in supporting agricultural activities in the region. With a normal storage capacity of 55 acre-feet and a surface area of 6 acres, the dam contributes to the overall water management infrastructure in the area.
While the dam's risk assessment and management measures are not explicitly outlined, its presence underscores the importance of proper maintenance and monitoring for water resource sustainability. As a key component of the local irrigation system, Gregory Dam stands as a testament to the vital role that private infrastructure plays in supporting agricultural activities and water resource management in the region.
Dam Length |
435 |
Dam Height |
29 |
River Or Stream |
Unnamed tributary to John's Run |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
29 |
Nid Storage |
70 |
Structural Height |
29 |
Hazard Potential |
Undetermined |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dan River At Paces
|
1490cfs |
Banister River At Halifax
|
217cfs |
Dan River At Stp Near Danville
|
1250cfs |
Dan River At South Boston
|
1480cfs |
Pigg River Near Sandy Level
|
239cfs |
Sandy River Near Danville
|
47cfs |
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.
Gregory Dam