Maughan Dam Reservoir Report
Nearby: Crow Hillside (Lake)
Last Updated: December 5, 2025
Maughan Dam, located in Lake County, Montana, is a privately owned structure primarily used for irrigation purposes.
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Summary
Completed in 1960, this earth dam stands at a height of 35 feet and has a storage capacity of 55 acre-feet. Situated on the TR-Flathead River, the dam serves as a vital resource for water management in the region.
With a low hazard potential and a current condition assessment of "Not Rated," Maughan Dam plays a crucial role in supporting agricultural activities in the area. Although specific details on the spillway type and other structural features are not provided, the dam's presence ensures a reliable water supply for the surrounding community. Its location within the Seattle District and under the jurisdiction of the Montana Department of Natural Resources and Conservation further highlights its importance in water resource management.
While the dam's emergency action plan status and risk assessment details are not specified in the data, Maughan Dam remains a key infrastructure for water storage and distribution in the region. With its historical significance and ongoing role in irrigation, this structure exemplifies the intersection of water resource management and climate resilience in Montana.
Year Completed |
1960 |
Dam Length |
500 |
Dam Height |
35 |
River Or Stream |
TR-FLATHEAD RIVER |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
31 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Crow Creek Near Ronan Mt
|
9cfs |
Flathead River Near Polson Mt
|
8210cfs |
Flathead River At Perma Mt
|
8540cfs |
Mission Cr Ab Reservoir Nr St Ignatius Mt
|
27cfs |
Clark Fork Near Plains Mt
|
11300cfs |
South Fork Jocko River Near Arlee Mt
|
83cfs |
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.
Maughan Dam