John H. Kerr Dam - Saddle Dike 4 Reservoir Report

Last Updated: December 6, 2025

John H.


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Summary

Kerr Dam, also known as Saddle Dike 4, is a federal-owned structure located in Boydton, Virginia, on the Roanoke River. Built in 1953 by the US Army Corps of Engineers, this gravity dam stands at a height of 12 feet and spans a length of 1850 feet, with a surface area of 48,900 acres. Its primary purpose is flood risk reduction, serving as a critical component in managing water levels along the river.

The dam has a high hazard potential and is regularly monitored and maintained by the US Army Corps of Engineers to mitigate risks associated with potential flooding events. Emergency action plans are in place, and the dam is inspected every five years to ensure its structural integrity. The Corps works closely with local emergency managers and the public to raise awareness and readiness for any dam-related emergencies that may arise.

Despite the risks posed by severe weather events and the limited capacity to store water, the US Army Corps of Engineers remains committed to managing flood risks associated with the dam. By prioritizing maintenance, monitoring, and risk assessment measures, they aim to safeguard the surrounding communities and ensure the dam's continued functionality. More detailed information specific to this dam will be forthcoming, underscoring the ongoing efforts to protect water resources and address climate-related challenges in the region.

Year Completed

1953

Dam Length

1850

Dam Height

12

River Or Stream

ROANOKE RIVER

Primary Dam Type

Gravity

Surface Area

48900

Drainage Area

7800

Hazard Potential

High

Nid Height

12
       
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.