Arthur V. Ormond Lock And Dam Reservoir Report

Last Updated: December 5, 2025

Arthur V.


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Summary

Ormond Lock and Dam, also known as Pool 9, is a federal water infrastructure located in Morrilton, Arkansas, along the Arkansas River. Completed in 1969, this concrete gravity dam stands at 57 feet tall and stretches 1850 feet in length. Its primary purpose is navigation, but it also serves hydroelectric and recreational purposes. Managed by the US Army Corps of Engineers, the dam has a significant hazard potential and a very high risk assessment rating.

The dam's risk management measures include continuous monitoring, prioritized maintenance activities, and collaboration with local emergency managers to raise awareness and develop emergency response plans. The USACE works to address all types of flood risks associated with the dam, ensuring its structural integrity and the safety of downstream areas. Regular updates to the emergency action plan and maintenance activities are essential to keep the dam functioning properly and ready to respond in case of a dam-related emergency.

Despite its limitations in water storage capacity, Arthur V. Ormond Lock and Dam plays a crucial role in managing water levels and mitigating flood risks. As severe weather events can bring inconsistent or larger amounts of water into the system, the dam's controlled spillway and lock system are essential for maintaining the safety and functionality of the structure. Ongoing efforts by the USACE ensure that the dam is well-equipped to handle potential challenges and protect surrounding communities from the impacts of flooding.

Year Completed

1969

Dam Length

1850

Dam Height

28

River Or Stream

ARKANSAS

Primary Dam Type

Concrete

Surface Area

5660

Length Of Locks

600

Hydraulic Height

26

Drainage Area

154949

Nid Storage

70400

Structural Height

57

Hazard Potential

Significant

Foundations

Rock

Nid Height

57
       
Seasonal Comparison

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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.