Mound Lake Dam Reservoir Report
Last Updated: December 25, 2025
Mound Lake Dam, located in Lonoke, Arkansas, was completed in 1950 for the primary purpose of recreation.
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Summary
This earth dam stands at a hydraulic height of 8 feet and a structural height of 10 feet, with a length of 400 feet. The dam has a storage capacity of 700 acre-feet, with normal storage at 510 acre-feet, making it a significant water resource in the area.
Despite being rated as having a low hazard potential and not currently inspected or regulated by the state, Mound Lake Dam is an important structure for managing water resources in the Plum Bayou-TR watershed. The dam plays a crucial role in controlling water discharge, with a maximum discharge capacity of 311 cubic feet per second. Additionally, the dam provides recreational opportunities for the local community, highlighting the multifaceted benefits of water resource management in the region.
As climate change continues to impact water resources and weather patterns, structures like Mound Lake Dam will become increasingly vital for maintaining water quality and availability. With a focus on recreation and water management, this dam serves as a reminder of the interconnectedness between human activities and the environment, emphasizing the importance of sustainable practices for the future.
Year Completed |
1950 |
Dam Length |
400 |
River Or Stream |
PLUM BAYOU-TR |
Primary Dam Type |
Earth |
Hydraulic Height |
8 |
Nid Storage |
700 |
Structural Height |
10 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Mound Lake Dam