Hamlin Dam Reservoir Report
Last Updated: December 11, 2025
Located in Monticello, Missouri, the Hamlin Dam is a privately owned structure designed for grade stabilization along the TR-North Fabius River.
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Summary
Completed in 1992, this earthen dam stands at a height of 28 feet with a length of 300 feet, providing a storage capacity of 57 acre-feet. With a primary purpose of grade stabilization, the Hamlin Dam serves to mitigate erosion and sedimentation in the area, supporting the surrounding ecosystem and water quality of the river.
Managed by the Rock Island District of the US Army Corps of Engineers, the Hamlin Dam has a low hazard potential and is currently rated as "Not Rated" for its condition assessment. Although it does not have a state regulatory agency overseeing its operations, the dam remains a crucial structure for water resource management in the region. With a moderate risk assessment rating, the Hamlin Dam plays a vital role in safeguarding the local community against potential flood events and ensuring the sustainable use of water resources in Lewis County.
Despite its remote location and limited associated structures, the Hamlin Dam stands as a testament to the importance of proactive water resource management and infrastructure maintenance. With its uncontrolled spillway and moderate risk level, the dam serves as a critical component of the regional watershed, highlighting the intersection of water resource management and climate resilience in the face of changing environmental conditions.
Year Completed |
1992 |
Dam Length |
300 |
Dam Height |
28 |
River Or Stream |
TR-NORTH FABIUS RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
28 |
Drainage Area |
166 |
Nid Storage |
57 |
Structural Height |
28 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wyaconda River Above Canton
|
13cfs |
Fox River At Wayland
|
8cfs |
South Fabius River Near Taylor
|
12cfs |
Bear Creek Near Marcelline
|
5cfs |
Des Moines River At St. Francisville
|
1620cfs |
North River At Palmyra
|
19cfs |
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.
Hamlin Dam