Dean Lake Dam Reservoir Report
Nearby: King Lake Dam Bruce Gamet Dam
Last Updated: December 11, 2025
Dean Lake Dam, located in Mercer, Missouri, is a privately owned structure primarily used for fire protection and as a small fish pond.
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Summary
The dam stands at a height of 25 feet and has a storage capacity of 27 acre-feet. Although the dam is classified as having a low hazard potential, its condition has not been officially rated. The dam is situated on TR-Martin Creek and falls under the jurisdiction of the Rock Island District of the US Army Corps of Engineers.
Despite its modest size and purpose, Dean Lake Dam plays a crucial role in providing fire protection and supporting local fish populations. While it may not be subject to regular state inspections or regulatory oversight, its importance in the community cannot be understated. With its serene location and functional design, Dean Lake Dam serves as a reminder of the delicate balance between water resource management and environmental conservation in the face of changing climate patterns.
Dam Height |
25 |
River Or Stream |
TR-MARTIN CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
15 |
Nid Storage |
27 |
Structural Height |
25 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
East Fork Big Creek Near Bethany
|
4cfs |
Thompson River At Trenton
|
143cfs |
Thompson River At Davis City
|
22cfs |
Medicine Creek Near Laredo
|
20cfs |
Grand River Near Gallatin
|
76cfs |
Locust Creek Near Linneus
|
24cfs |
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.
Dean Lake Dam