Hallman Lake Dam Reservoir Report
Last Updated: December 18, 2025
Hallman Lake Dam, located in Daviess, Missouri, is a private earth dam built in 1880 primarily for recreational purposes.
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Summary
Standing at a height of 20 feet, the dam has a storage capacity of 171 acre-feet and serves as a tranquil spot for outdoor activities in the area. With a low hazard potential and a condition assessment that is currently not rated, the dam is a key feature along the TR-South Big Creek.
Managed by the Rock Island District of the US Army Corps of Engineers, Hallman Lake Dam boasts a surface area of 16 acres and a drainage area of 90 square miles. Despite its age, the dam has not undergone recent modifications and lacks certain safety features such as spillways and outlet gates. While it presents a low risk to the surrounding community, regular inspections and maintenance are essential to ensure its continued structural integrity and safety for visitors.
As climate change continues to impact water resources and infrastructure, it is crucial for water resource and climate enthusiasts to monitor and support the maintenance and management of dams like Hallman Lake Dam. By staying informed about the condition and potential risks associated with these structures, enthusiasts can advocate for sustainable practices and policies that protect both the environment and the communities that rely on these water sources for recreation and livelihood.
Year Completed |
1880 |
Dam Height |
20 |
River Or Stream |
TR-SOUTH BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Drainage Area |
90 |
Nid Storage |
171 |
Structural Height |
20 |
Hazard Potential |
Low |
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.
Hallman Lake Dam