John Simpson Dam Reservoir Report
Nearby: Penny Lake Dam Clark Lake Dam
Last Updated: December 18, 2025
John Simpson Dam, located in Caldwell County, Missouri, is a privately owned earth dam completed in 1954 for fire protection, stock, and small fish pond purposes.
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Summary
With a height of 16 feet and a storage capacity of 128 acre-feet, this dam serves the community of Dawn by providing essential water resources while also contributing to the local ecosystem. Situated on the TR-Little Otter Creek, this structure plays a crucial role in managing water flow and maintaining water quality in the area.
Despite its low hazard potential, the condition of John Simpson Dam is currently not rated, indicating a need for further assessment and maintenance to ensure its long-term reliability and safety. With no state regulation or inspection in place, it is essential for the private owner to take proactive measures to monitor and address any potential risks or issues that may arise. The dam's location within the Rock Island District highlights its significance in the region's water resource management and underscores the importance of maintaining its functionality for the community's benefit.
As a key feature in the local water infrastructure, John Simpson Dam stands as a testament to the vital role of private owners in safeguarding water resources and adapting to changing climate conditions. With its historic significance and practical utility, this dam serves as a reminder of the interconnectedness between water management, environmental preservation, and community resilience in the face of evolving climate challenges. As enthusiasts and advocates for water resources and climate action, the conservation and sustainable management of structures like John Simpson Dam are crucial for ensuring a secure and sustainable water future for all.
Year Completed |
1954 |
Dam Height |
16 |
River Or Stream |
TR-LITTLE OTTER CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Drainage Area |
252 |
Nid Storage |
128 |
Structural Height |
16 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
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.
John Simpson Dam