Manchurians Reservoir Report
Nearby: Dammel Reservoir Spica
Last Updated: December 5, 2025
Manchurians is a state-owned dam located in Chouteau, Montana, specifically on TR-Flat Creek.
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Summary
Built in 1960, this earth dam stands at a height of 15 feet and has a maximum storage capacity of 178 acre-feet, with a normal storage capacity of 116 acre-feet. The primary purposes of this dam are fire protection, stock, and serving as a small fish pond.
Managed by the Department of Natural Resources and Conservation (DNRC), Manchurians is regulated, permitted, inspected, and enforced by the state of Montana. With a low hazard potential and a condition assessment that is currently not rated, this dam plays a crucial role in local water resource management and climate resilience efforts. Despite its age, Manchurians continues to serve its intended purposes effectively and safely.
Although not rated for its condition, Manchurians is regularly inspected by state authorities and is in compliance with state regulations. With its strategic location and storage capacity, this dam contributes to fire protection, livestock management, and aquatic conservation efforts in the region. As an important water resource infrastructure in Montana, Manchurians highlights the state's commitment to ensuring the safety and sustainability of its dams for the benefit of both humans and the environment.
Year Completed |
1960 |
Dam Length |
375 |
Dam Height |
15 |
River Or Stream |
TR-FLAT CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
178 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Missouri River At Virgelle Mt
|
4290cfs |
Teton River At Loma Mt
|
30cfs |
Missouri River At Fort Benton Mt
|
4720cfs |
Marias River Near Loma Mt
|
335cfs |
Judith River Nr Mouth
|
368cfs |
Missouri River Near Great Falls Mt
|
3530cfs |
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.
Manchurians