Lenny Lake Dam Reservoir Report
Last Updated: December 6, 2025
Lenny Lake Dam, located in Johnson County, Missouri, is a privately owned structure with a primary purpose of irrigation.
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Summary
Completed in 1960, this earth dam stands at a height of 20 feet and has a storage capacity of 220 acre-feet. Situated on Coon Creek, the dam serves as a vital resource for water supply and irrigation in the region.
Despite its importance, Lenny Lake Dam has a high hazard potential and is currently not rated for its condition. With no recent inspection data available, there is a need for regular assessments to ensure the safety and functionality of the dam. The lack of an Emergency Action Plan (EAP) and other risk management measures highlights the importance of prioritizing the maintenance and monitoring of this critical water resource infrastructure.
As water resource and climate enthusiasts, understanding the significance of dams like Lenny Lake Dam is crucial for managing water supply and irrigation needs in the face of changing environmental conditions. With its location in a high-risk area and limited regulatory oversight, there is a call to action for stakeholders to implement proper safety protocols and maintenance practices to safeguard this essential water infrastructure for the community.
Year Completed |
1960 |
Dam Height |
20 |
River Or Stream |
COON CREEK |
Primary Dam Type |
Earth |
Surface Area |
20 |
Drainage Area |
481 |
Nid Storage |
220 |
Structural Height |
20 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Lenny Lake Dam