Vananda Reservoir Report
Nearby: Zempel #3 Wheeler #1
Last Updated: December 7, 2025
Vananda is a privately owned irrigation dam located in Rosebud, Montana, with a primary purpose of providing water for agricultural use.
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Summary
Constructed in 1936, this earth dam stands at a height of 42 feet and has a storage capacity of 63 acre-feet. Situated on TR-LONGFORK CREEK, Vananda plays a crucial role in the local water resource management, offering vital support to the surrounding farmland in Forsyth.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Vananda is regulated and inspected regularly to ensure its safety and functionality. With a low hazard potential and a "Not Rated" condition assessment, the dam provides a reliable water source for the area while posing minimal risks to the environment and nearby communities. Despite its age, Vananda continues to serve as a valuable asset for irrigation in the region, showcasing the importance of sustainable water infrastructure in mitigating the impacts of climate change.
As a key component of the local water infrastructure, Vananda contributes to the overall resilience of the agricultural sector in Rosebud County. With its strategic location and efficient operation, the dam exemplifies the significance of proactive water management practices in adapting to changing climatic conditions and ensuring long-term water security for the community. By maintaining and regulating structures like Vananda, water resource enthusiasts can work towards building a more sustainable and climate-resilient future for Montana's water systems.
Year Completed |
1936 |
Dam Length |
240 |
Dam Height |
42 |
River Or Stream |
TR-LONGFORK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
35 |
Nid Storage |
63 |
Hazard Potential |
Low |
Nid Height |
42 |
Seasonal Comparison
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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.
Vananda