Little Reservoir Report
Nearby: Stephens Battle Horse Reservoir
Last Updated: December 6, 2025
The Little dam, located in Chinook, Montana, was completed in 1930 and serves multiple purposes including fire protection, stock water supply, and a small fish pond.
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Summary
This privately owned earth dam has a height of 20 feet and a length of 150 feet, with a storage capacity of 70 acre-feet. Situated on the TR-Choteau Coulee river, it falls under the jurisdiction of the state of Montana and is regulated by the Department of Natural Resources and Conservation (DNRC). Despite its low hazard potential, the dam's condition has not been rated, indicating a need for further assessment and monitoring.
The Little dam, managed by a private owner, is crucial for providing essential water resources in the region for fire protection, livestock, and recreational use. The dam's low hazard potential suggests a relatively low risk of failure, but its condition assessment remains ungraded, highlighting the importance of regular inspections and maintenance. The dam's location in the Omaha District and its association with the Congressional District 00 in Montana underscore its significance within the state's water resource management framework.
With a primary purpose of fire protection and livestock water supply, the Little dam in Montana plays a vital role in the local water supply infrastructure. While it has a low hazard potential, its condition assessment remains unknown, indicating a need for continued monitoring and evaluation. Regulated by the state and located on the TR-Choteau Coulee river, this earth dam serves as a valuable resource for the community of Chinook and surrounding areas, underscoring the importance of responsible water resource management and maintenance practices.
Year Completed |
1930 |
Dam Length |
150 |
Dam Height |
20 |
River Or Stream |
TR-CHOTEAU COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
70 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Little