Trenton Lake Upper Dam Reservoir Report
Nearby: Trenton Lower Lake Dam Davis Lake Dam
Last Updated: December 19, 2025
Trenton Lake Upper Dam, located in Grundy, Missouri, along the TR MUDDY CREEK, serves as a crucial flood risk reduction structure completed in 1963.
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Summary
The privately owned earth dam stands at 34 feet in height and stretches 1330 feet in length, offering a storage capacity of 1256 acre-feet. With a normal storage capacity of 690 acre-feet and a surface area of 67 acres, the dam plays a vital role in managing water resources in the region.
Despite its high hazard potential, the dam's condition assessment remains unrated, with the last inspection conducted in August 1979. The primary purpose of the dam is flood risk reduction, with additional benefits for recreation. With a moderate risk assessment rating and no designated emergency action plan in place, there is a need for increased monitoring and management of the dam to ensure its continued safety and effectiveness in the face of changing climate conditions. For water resource and climate enthusiasts, Trenton Lake Upper Dam presents a unique case study in the intersection of infrastructure, water management, and climate resilience.
Year Completed |
1963 |
Dam Length |
1330 |
Dam Height |
34 |
River Or Stream |
TR MUDDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
67 |
Drainage Area |
577 |
Nid Storage |
1256 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Thompson River At Trenton
|
111cfs |
Medicine Creek Near Laredo
|
6cfs |
Grand River Near Gallatin
|
61cfs |
Locust Creek Near Linneus
|
35cfs |
Grand River At Chillicothe
|
361cfs |
East Fork Big Creek Near Bethany
|
2cfs |
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.
Trenton Lake Upper Dam