Hamilton Lake Dam-Sec 33 Reservoir Report
Last Updated: December 11, 2025
Hamilton Lake Dam-Sec 33, located in Mercer, Missouri, is a privately owned earth dam constructed in 1977 for the primary purpose of grade stabilization along TR-Martin Creek.
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Summary
Standing at a height of 25 feet with a structural height of 26 feet, this dam plays a crucial role in controlling the flow of water and maintaining the stability of the surrounding area. With a storage capacity of 80 acre-feet and a normal storage level of 23 acre-feet, the dam covers a surface area of 7 acres and serves a drainage area of 129 square miles.
The dam features an uncontrolled spillway with a width of 10 feet and is categorized as low hazard potential with a moderate risk assessment. Despite not being regulated or inspected by the state, Hamilton Lake Dam-Sec 33 is an essential structure for water resource management in the region. While the dam is currently in satisfactory condition and not rated for its structural integrity, further assessments and risk management measures may be necessary to ensure its long-term safety and effectiveness in mitigating flood risks and protecting the local environment.
Notably, the dam does not have any associated locks or outlet gates, emphasizing its simple yet vital role in maintaining water levels and preventing potential flooding. With its location in the Rock Island District and under the jurisdiction of private ownership, Hamilton Lake Dam-Sec 33 stands as a key infrastructure for maintaining the ecological balance and water resources in the area, making it a noteworthy site for water resource and climate enthusiasts to explore and study.
Year Completed |
1977 |
Dam Length |
390 |
Dam Height |
25 |
River Or Stream |
TR-MARTIN CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
24 |
Drainage Area |
129 |
Nid Storage |
80 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
East Fork Big Creek Near Bethany
|
4cfs |
Thompson River At Trenton
|
143cfs |
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.
Hamilton Lake Dam-Sec 33