Sunday Milk Reservoir Report
Nearby: Lefdehl Big Goose Retention Dam
Last Updated: December 5, 2025
Sunday Milk is a privately owned earth dam located in Phillips County, Montana, near the city of Wagner.
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Summary
Completed in 1958, this dam stands at a height of 15 feet and has a storage capacity of 138 acre-feet, primarily serving purposes such as fire protection, stock watering, and small fish pond maintenance. Situated along TR-Beaver Creek, Sunday Milk is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is subject to state permitting, inspection, and enforcement.
With a low hazard potential and a condition assessment of "Not Rated," Sunday Milk has not been designated with an Emergency Action Plan (EAP) or undergone recent inspection. Despite its modest size and limited risk, the dam remains an essential resource for the local community and wildlife in the area. As a crucial infrastructure for water management and conservation in the region, Sunday Milk plays a vital role in maintaining the ecological balance and supporting various water-dependent activities.
Owned by a private entity, Sunday Milk exemplifies the collaborative efforts needed to manage water resources effectively in a changing climate. As climate change continues to impact water availability and quality, sustainable practices and regulations are essential to ensure the resilience of dams like Sunday Milk and their ability to meet the growing water demands of the future. Through proactive monitoring, maintenance, and emergency preparedness, Sunday Milk stands as a testament to the importance of responsible water resource management in safeguarding communities and ecosystems against the challenges of a changing climate.
Year Completed |
1958 |
Dam Length |
300 |
Dam Height |
15 |
River Or Stream |
TR-BEAVER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
138 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Sunday Milk