O'Hara Lake Dam Reservoir Report
Nearby: Camp Lake Dam White Oak Camp Lake Dam
Last Updated: December 17, 2025
O'Hara Lake Dam, located in Middle Grove, Missouri, is a privately owned structure on TR-Coon Creek with a primary purpose classified as "Other".
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Summary
This earth dam, with a structural height of 25 feet and a storage capacity of 201 acre-feet, serves as a vital resource for water management in the region. Despite its high hazard potential, the dam's condition assessment is currently not rated, highlighting the need for regular inspections and maintenance to ensure its safety and reliability.
Owned by a private entity, O'Hara Lake Dam is not regulated or permitted by the state, indicating a unique level of autonomy in its operations. With a maximum storage capacity of 201 acre-feet and a normal storage level of 125 acre-feet, the dam plays a crucial role in managing water resources and mitigating flood risks in the area. The dam's high hazard potential underscores the importance of implementing risk management measures and emergency action plans to protect downstream communities in case of a potential breach or failure.
As an earth dam with a buttress core type, O'Hara Lake Dam stands as a significant infrastructure asset in Randolph County, Missouri. Its location on TR-Coon Creek and its proximity to St. Louis District highlight its strategic importance in water resource management. With a focus on maintaining its integrity and ensuring proper risk assessment and management, O'Hara Lake Dam serves as a critical component in the region's water infrastructure network for both water resource and climate enthusiasts to appreciate and monitor.
Dam Height |
25 |
River Or Stream |
TR-COON CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Drainage Area |
153 |
Nid Storage |
201 |
Structural Height |
25 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
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.
O'Hara Lake Dam