Grattan Dam Reservoir Report
Nearby: Seth Corp Dam Dunivan Dam
Last Updated: December 6, 2025
Grattan Dam, located in Goochland, Virginia, is a private water resource structure regulated by the Department of Conservation and Recreation.
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Summary
The dam stands at a height of 30 feet with a hydraulic height matching that figure, and a length of 315 feet. Its primary purpose and dam type are unspecified, but it boasts a maximum storage capacity of 129.96 acre-feet and a normal storage level of 68.34 acre-feet, covering a surface area of 6.7 acres. Although its condition assessment is listed as "Not Rated" and its hazard potential is deemed "Undetermined", the dam is subject to state regulation, inspection, and enforcement to ensure its safety and compliance.
Grattan Dam, nestled in the Norfolk District, has not been modified over the years and lacks specific data on its completion year or spillway type. Despite its current condition assessment and hazard potential remaining unclassified, the dam undergoes frequent inspections every year. While emergency response preparedness details are not provided, the structure's risk assessment, management measures, and inundation maps status are also undisclosed. Grattan Dam's emergency action plan adherence and compliance with guidelines have not been verified, yet its overall risk characterization and DSAC assignment date are not specified.
In the picturesque landscape of Goochland, Virginia, Grattan Dam stands as a private water resource structure with a significant storage capacity and a crucial role in the state's water management. The dam's lack of specific details on certain operational aspects and risk management measures may raise questions among water resource and climate enthusiasts, but its regulation by the Department of Conservation and Recreation ensures that it meets state standards and undergoes regular inspections to maintain public safety and environmental integrity. With its scenic location and vital function in the local water system, Grattan Dam remains an intriguing feature for those interested in water resources and climate management.
Dam Length |
315 |
Dam Height |
30 |
Surface Area |
6.7 |
Hydraulic Height |
30 |
Nid Storage |
129.96 |
Structural Height |
30 |
Hazard Potential |
Undetermined |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
James River At Cartersville
|
1950cfs |
Fine Creek At Fine Creek Mills
|
3cfs |
Appomattox River At Mattoax
|
292cfs |
James River And Kanawha Canal Near Richmond
|
131cfs |
Rivanna River At Palmyra
|
175cfs |
Slate River Near Arvonia
|
68cfs |
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.
Grattan Dam
River Launch Road Powhatan County