Holtzgraph Dam Reservoir Report
Nearby: Overhill Dam Grassy Dam
Last Updated: December 8, 2025
Holtzgraph Dam, located in Hanover, Virginia, is a key water resource structure managed by the Department of Conservation and Recreation.
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Summary
This earth dam stands at a height of 25 feet and stretches 500 feet in length, with a storage capacity of 160 acre-feet on the TR-CHICKAHOMINY RIVER. While its primary purpose is categorized as "Other," the dam serves important functions for the surrounding area. Despite being designated as "Undetermined" in terms of hazard potential and "Not Rated" in condition assessment, Holtzgraph Dam is regularly inspected by state authorities to ensure its safety and compliance with regulatory standards.
Managed by the Norfolk District of the US Army Corps of Engineers, Holtzgraph Dam plays a crucial role in water resource management and flood control efforts in the region. Although specifics on completion year, surface area, and drainage area are not provided, the dam's strategic location on the TR-CHICKAHOMINY RIVER highlights its significance in maintaining water supply and mitigating potential risks. The dam's emergency action plan status, risk assessment, and management measures are currently unspecified, indicating the need for further evaluation and preparedness in the face of potential emergencies.
With the dam's condition assessment still pending and hazard potential undetermined, there is a pressing need for continued monitoring and evaluation to ensure the safety and effectiveness of Holtzgraph Dam. As an essential water resource structure in Hanover, Virginia, its role in water supply, flood control, and overall environmental management cannot be understated. By staying vigilant in inspections, maintenance, and emergency preparedness, authorities can uphold the integrity of Holtzgraph Dam and safeguard the surrounding community from potential risks and hazards.
Dam Length |
500 |
Dam Height |
25 |
River Or Stream |
TR-CHICKAHOMINY RIVER |
Hydraulic Height |
25 |
Nid Storage |
160 |
Structural Height |
25 |
Hazard Potential |
Undetermined |
Nid Height |
25 |
Seasonal Comparison
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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.
Holtzgraph Dam
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