Wagner Reservoir Report
Nearby: Blue Cheese Cain Dam
Last Updated: December 19, 2025
Wagner is a private irrigation dam located in Tampico, Montana, along the TR-Unger Coulee river.
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Summary
Built in 1962 by the USDA NRCS, this earth dam stands at 7 feet tall and spans 889 feet in length, providing a storage capacity of 214 acre-feet for irrigation purposes. The dam is state-regulated by the DNRC and undergoes regular inspections and enforcement to ensure its safety and compliance with regulations.
Situated in Valley County, Montana, Wagner serves as a crucial water resource for the surrounding agricultural community, supporting irrigation needs in the region. With a low hazard potential and a current condition assessment of 'Not Rated', Wagner plays a key role in water management and conservation efforts in the area. Although not rated for emergency preparedness, Wagner remains a vital infrastructure for sustaining the local ecosystem and economy.
As part of the larger water resource infrastructure in Montana, Wagner contributes to the overall water management efforts in the state. With its modest dimensions and purposeful design, Wagner exemplifies the intersection of human ingenuity and environmental stewardship in harnessing water resources for sustainable development. Climate and water resource enthusiasts can appreciate the significance of Wagner in balancing water needs for agriculture while maintaining environmental integrity in the region.
Year Completed |
1962 |
Dam Length |
889 |
Dam Height |
7 |
River Or Stream |
TR-UNGER COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
7 |
Drainage Area |
2.97 |
Nid Storage |
214 |
Hazard Potential |
Low |
Nid Height |
7 |
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.
Wagner