Cloudy Day Reservoir Report
Nearby: Thav Robbie (Teton)
Last Updated: December 5, 2025
Cloudy Day is a private earth dam located in Teton, Montana, along the TR-Muddy Creek.
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Summary
Built in 1953 for irrigation purposes, this dam stands at a height of 20 feet and has a length of 1350 feet. With a storage capacity of 62 acre-feet, Cloudy Day serves as a vital water resource for the surrounding area. Despite being classified as having a low hazard potential, the dam's condition assessment is currently listed as "Not Rated".
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Cloudy Day is subject to state regulations and inspections to ensure its safety and functionality. While the dam has not been rated for its condition, it is important to note that emergency action plans and risk assessments have not been prepared, indicating a potential area for improvement in the dam's management. As a key infrastructure for irrigation in the region, Cloudy Day plays a crucial role in water resource management and climate resilience efforts in Montana.
Year Completed |
1953 |
Dam Length |
1350 |
Dam Height |
20 |
River Or Stream |
TR-MUDDY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Muddy Creek At Vaughn Mt
|
86cfs |
Teton River Near Dutton Mt
|
83cfs |
Lake Creek Near Power Mt
|
30cfs |
Sun River At Simms Mt
|
1620cfs |
Sun River Near Vaughn Mt
|
2680cfs |
Missouri River Near Ulm Mt
|
3160cfs |
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.
Cloudy Day