Marstaeller Irrigation Dam Reservoir Report
Nearby: Cinnamon #4 Cinnamon #2
Last Updated: December 5, 2025
Marstaeller Irrigation Dam is a vital infrastructure in Sweet Grass, Montana, serving the agricultural community by providing water from Tony (Pruett) Creek for irrigation purposes.
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Summary
Built in 1984, this earth dam stands at a height of 39 feet and stretches 480 feet in length, with a storage capacity of 270 acre-feet. Managed by a private owner, the dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), ensuring its safety and compliance with state standards.
Located in Lavina, the Marstaeller Irrigation Dam plays a crucial role in supporting local farmers and sustaining the surrounding ecosystem. With a low hazard potential and a condition assessment of "Not Rated," the dam has not undergone recent inspections but is maintained to meet state requirements. While the dam currently does not have emergency action plans or inundation maps prepared, its operational efficiency and safety are continuously monitored to mitigate risks and ensure its resilience in the face of changing climate patterns.
As climate change continues to impact water resources, Marstaeller Irrigation Dam stands as a testament to the importance of sustainable water management practices. With a focus on irrigation and supporting agricultural activities, the dam serves as a lifeline for the community, highlighting the critical role of infrastructure in adapting to environmental challenges and ensuring water security for future generations.
Year Completed |
1984 |
Dam Length |
480 |
Dam Height |
39 |
River Or Stream |
TONY (PRUETT) CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
39 |
Nid Storage |
270 |
Hazard Potential |
Low |
Nid Height |
39 |
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.
Marstaeller Irrigation Dam