Hagan Lake Dam Reservoir Report
Last Updated: December 15, 2025
Hagan Lake Dam, located in Columbia, Missouri, was completed in 1960 and is primarily used for recreation purposes.
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Summary
The earth dam stands at a height of 19 feet and has a storage capacity of 71 acre-feet, with a normal storage level of 66 acre-feet. The dam is situated on the Hominy Branch river, within the St. Louis District of the US Army Corps of Engineers.
Despite being privately owned, Hagan Lake Dam poses a high hazard potential due to its condition assessment being labeled as "Not Rated." The last inspection of the dam was conducted in June 1980, indicating a lapse in regular monitoring and maintenance. With no regulatory oversight from state agencies and no emergency action plan in place, concerns about the safety and resilience of the dam arise, especially in the face of changing climate conditions and increased water resource management challenges.
For water resource and climate enthusiasts, the case of Hagan Lake Dam serves as a reminder of the importance of proper infrastructure maintenance and emergency preparedness in the face of potential hazards. As the dam's risk assessment and management measures remain unclear, further attention and action are needed to ensure the safety of the surrounding community and the integrity of the dam in the event of extreme weather events or other emergencies.
Year Completed |
1960 |
Dam Height |
19 |
River Or Stream |
HOMINY BRANCH |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
160 |
Nid Storage |
71 |
Structural Height |
19 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Hinkson Creek At Columbia
|
1cfs |
Moniteau Creek Near Fayette
|
3cfs |
Missouri River At Jefferson City
|
30600cfs |
Missouri River At Boonville
|
30100cfs |
Moreau River Near Jefferson City
|
30cfs |
Elk Fork Salt River Near Madison
|
12cfs |
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.
Hagan Lake Dam