Lake Overcup Dam Reservoir Report

Last Updated: December 5, 2025

Lake Overcup Dam, located in Morrilton, Arkansas, is a state-regulated structure on Overcup Creek with a primary purpose of serving as a Fish and Wildlife Pond.


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Summary

Completed in 1963, this earth dam stands at a height of 26 feet and has a hydraulic height of 20 feet, providing a storage capacity of 12,000 acre-feet and covering a surface area of 1,025 acres.

Managed by the Arkansas Natural Resources Commission, Lake Overcup Dam plays a significant role in the conservation of fish and wildlife in the area. With a drainage area of 16.4 square miles, the dam serves as a vital resource for maintaining ecosystems and supporting biodiversity in the region. Despite being deemed as having a significant hazard potential, the dam's condition assessment remains unrated, emphasizing the need for regular inspections and maintenance to ensure its safety and functionality.

The Little Rock District of the US Army Corps of Engineers oversees the operations of Lake Overcup Dam, ensuring that it meets state regulations and inspection standards. As a key component in the management of water resources in Conway County, this dam not only provides essential habitat for fish and wildlife but also serves as a recreational area for outdoor enthusiasts and nature lovers to enjoy. With its picturesque surroundings and important ecological role, Lake Overcup Dam stands as a testament to the intersection of water resource management and climate conservation efforts in Arkansas.

Year Completed

1963

Dam Length

5200

Dam Height

26

River Or Stream

OVERCUP CREEK

Primary Dam Type

Earth

Surface Area

1025

Hydraulic Height

20

Drainage Area

16.4

Nid Storage

12000

Structural Height

20

Hazard Potential

Significant

Nid Height

26
       
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.
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Area Campgrounds