Peterson Lake Dam Reservoir Report
Last Updated: January 12, 2026
Peterson Lake Dam, located in Lonoke, Arkansas, was completed in 1950 and serves primarily for irrigation purposes.
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Summary
This private earth dam stands at a hydraulic height of 10 feet and spans a length of 1,100 feet. With a maximum storage capacity of 700 acre-feet and a normal storage level of 600 acre-feet, the dam covers a surface area of 163.7 acres within a drainage area of 0.68 square miles.
Managed by the Vicksburg District of the US Army Corps of Engineers, Peterson Lake Dam has a low hazard potential and its condition is currently not rated. While the dam has not been inspected recently, it is noteworthy for its role in regulating the flow of Bayou Two Prairie-TR. The dam's emergency action plan and risk assessment measures remain unreported, indicating potential areas for improvement in terms of safety and contingency planning.
Overall, Peterson Lake Dam stands as a vital infrastructure for irrigation in the region, yet its maintenance and emergency preparedness could benefit from increased attention. With its location in Lonoke County, Arkansas, and oversight from the Vicksburg District, continued monitoring and evaluation of the dam's structural integrity and safety protocols are essential for ensuring the long-term sustainability of water resources in the area.
Year Completed |
1950 |
Dam Length |
1100 |
River Or Stream |
BAYOU TWO PRAIRIE-TR |
Primary Dam Type |
Earth |
Surface Area |
163.7 |
Hydraulic Height |
10 |
Drainage Area |
0.68 |
Nid Storage |
700 |
Structural Height |
10 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bayou Meto Near Lonoke
|
44cfs |
White River At Devalls Bluff
|
8630cfs |
Cache River Near Cotton Plant
|
22cfs |
White River At Georgetown
|
8890cfs |
Rock Creek At 36th Street At Little Rock
|
16cfs |
White River Near Augusta
|
9130cfs |
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.
Peterson Lake Dam