Jack Rigsbee Dam Reservoir Report

Last Updated: December 5, 2025

Jack Rigsbee Dam, also known as Edward Hobby Dam, is a privately owned structure located in Cary, North Carolina, along the Turkey Creek-Tr river.


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Summary

Completed in 1954, this earth dam stands at a height of 18 feet and has a hydraulic height of 17 feet. The dam serves primarily for recreational purposes, with a normal storage capacity of 10 acre-feet and a maximum storage of 20 acre-feet.

Despite its recreational focus, Jack Rigsbee Dam has a high hazard potential, prompting regular inspections to ensure its structural integrity. The most recent assessment in March 2020 deemed the dam's condition as satisfactory. The dam's emergency action plan status and risk management measures remain undisclosed, highlighting potential areas for improvement and further assessment to enhance public safety and environmental protection in case of emergencies.

With its close proximity to residential areas and the risk posed by its high hazard potential, continued monitoring and maintenance of Jack Rigsbee Dam are essential to mitigate potential risks and ensure the safety of the surrounding community. This privately owned earth dam serves as a crucial recreational asset while also posing important considerations for dam safety and emergency preparedness in the face of changing climate patterns.

Year Completed

1954

Dam Length

450

River Or Stream

Turkey Creek-Tr

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

17

Nid Storage

20

Structural Height

18

Hazard Potential

High

Nid Height

18
       
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.