Deiphobus Reservoir Report
Nearby: Blooming Creek Dam Flicked Bic
Last Updated: December 5, 2025
Deiphobus, located in Cascade, Montana, is a privately owned Earth dam completed in 1953 for fire protection, stock, and small fish pond purposes.
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Summary
Situated on Crown Butte Creek, this dam stands at a height of 10 feet with a length of 200 feet, providing a storage capacity of 62 acre-feet. Despite its low hazard potential, Deiphobus is state regulated and subject to regular inspections, enforcement, and permitting by the Montana Department of Natural Resources and Conservation.
Owned by a private entity, Deiphobus serves as a vital resource for water management in the region, offering a reliable supply for various needs, including fire protection and agricultural activities. The dam's strategic location in Ulm, Montana, ensures a consistent water supply for local stakeholders while also contributing to the ecological balance of the area. With its modest storage capacity and operational efficiency, Deiphobus plays a crucial role in sustaining the surrounding ecosystem and supporting the community's water-related requirements.
As a significant infrastructure asset in the Walla Walla District, Deiphobus exemplifies the intersection of water resource management and climate resilience. While categorized as a low hazard structure, its strategic importance for fire protection and irrigation underscores the critical role that dams play in safeguarding communities and ecosystems. With its state-regulated status and adherence to inspection and enforcement protocols, Deiphobus stands as a dependable and essential component of Montana's water resource infrastructure.
Year Completed |
1953 |
Dam Length |
200 |
Dam Height |
10 |
River Or Stream |
CROWN BUTTE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
10 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sun River At Simms Mt
|
1620cfs |
Missouri River At Cascade Mt
|
3110cfs |
Dearborn River Near Craig Mt
|
40cfs |
Sun River Bl Willow Cr Nr Augusta Mt
|
116cfs |
Muddy Creek At Vaughn Mt
|
86cfs |
Sun River Near Vaughn Mt
|
2680cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Lowry Camp Site
|
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Lowry Bridge
|
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Fairfield City Park
|
Deiphobus