Allen Dam Reservoir Report
Last Updated: December 11, 2025
Allen Dam, located in Mercer, Missouri, serves as a vital structure for debris control along the TR-West Muddy Creek.
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Summary
Owned privately, this earth dam stands at a height of 25 feet and has a storage capacity of 27 acre-feet. Its primary purpose is debris control, with additional functions including fire protection and serving as a stock or small fish pond. With a low hazard potential and a current condition assessment of "Not Rated," Allen Dam plays a crucial role in managing water resources in the region.
Despite being privately owned and not regulated by the state, Allen Dam remains an important asset in the Rock Island District. The dam, with its buttress core type and unlisted/unknown foundation, contributes to the overall water management system in the area. While specifics such as the year of completion and last inspection date are not provided, the dam's presence ensures the protection of surrounding lands and communities from potential flooding and debris flow. For water resource and climate enthusiasts, Allen Dam represents a key element in the local ecosystem and serves as a reminder of the importance of sustainable water management practices.
As a structure with a primary focus on debris control, Allen Dam exemplifies the intersection of human engineering and environmental preservation. With a modest surface area of 2 acres and a drainage area of 20 acres, the dam contributes to the overall water balance in the region. While specific details such as spillway type and discharge capacity are not listed, the dam's low hazard potential and lack of state regulation indicate a relatively stable and well-maintained infrastructure. For those interested in water resource management and climate resilience, Allen Dam offers a case study in private ownership and community-based solutions for sustainable water infrastructure.
Dam Height |
25 |
River Or Stream |
TR-WEST MUDDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
20 |
Nid Storage |
27 |
Structural Height |
25 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Thompson River At Trenton
|
143cfs |
East Fork Big Creek Near Bethany
|
4cfs |
Medicine Creek Near Laredo
|
20cfs |
Thompson River At Davis City
|
22cfs |
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.
Allen Dam