Moore Dam Reservoir Report

Last Updated: December 7, 2025

Moore Dam, also known as Davis Dam and formerly named Williams Dam, is a private-owned structure located in Patrick, Virginia.


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Summary

This earth dam stands at 29 feet tall with a length of 175 feet, providing recreational opportunities along the tributary to Mayo River. Despite being designated for recreation, the dam's hazard potential is currently undetermined, and its condition is not rated, with the last inspection dating back to September 2004.

Managed by the Department of Conservation and Recreation in Virginia, Moore Dam serves as a crucial part of the state's regulatory framework, with permits, inspections, and enforcement in place to ensure its safety and integrity. The dam has a storage capacity of 41 acre-feet, primarily used for recreational purposes. While specifics about its spillway type, maximum discharge, and outlet gates are not provided, the dam's location and purpose make it a key feature in the water resource management and climate adaptation efforts in the region.

With its proximity to the Mayo River and surrounding areas, Moore Dam plays a vital role in supporting water activities, wildlife habitats, and flood control measures. As climate change impacts continue to affect water resources, the maintenance and monitoring of structures like Moore Dam become even more critical. By staying updated on its condition, emergency action plans, and risk assessment measures, water resource and climate enthusiasts can contribute to the sustainable management of this essential infrastructure in Virginia.

Dam Length

175

Dam Height

29

River Or Stream

TRIB TO MAYO RIVER

Primary Dam Type

Earth

Surface Area

2.75

Hydraulic Height

29

Drainage Area

0.92

Nid Storage

41

Structural Height

29

Hazard Potential

Undetermined

Nid Height

29
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.