Unionville Old City Lake Dam Reservoir Report
Nearby: Mccreary Dam Lake Mahoney Dam
Last Updated: December 12, 2025
Unionville Old City Lake Dam, located in Putnam County, Missouri, was completed in 1914 and serves as a vital infrastructure for debris control and recreation purposes.
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Summary
The earth dam, with a height of 28 feet, has a storage capacity of 180 acre-feet and covers a surface area of 12 acres. Situated on the TR-Blackbird Creek, the dam plays a crucial role in managing the drainage area of 245 square miles.
Despite its historical significance, Unionville Old City Lake Dam presents a high hazard potential and has not been rated for its condition assessment. The dam's emergency action plan status, inspection frequency, and risk assessment are all currently listed as unknown. With no state jurisdiction or regulatory oversight, the dam's safety and maintenance remain a concern for local government authorities and water resource enthusiasts.
As water resource and climate enthusiasts continue to monitor the Unionville Old City Lake Dam, the lack of updated information on its condition, emergency preparedness, and risk management measures raises concerns about its long-term stability and potential impact on surrounding communities. It is imperative for stakeholders to prioritize the assessment and maintenance of this critical infrastructure to ensure the safety and sustainability of the Unionville area.
Year Completed |
1914 |
Dam Height |
28 |
River Or Stream |
TR-BLACKBIRD CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
245 |
Nid Storage |
180 |
Structural Height |
28 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
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.
Unionville Old City Lake Dam