Hook #55 Reservoir Report
Nearby: Barley Reservoir Hook #50
Last Updated: December 6, 2025
Located in Rosebud, Montana, Hook #55 is a privately owned irrigation dam that was completed in 1958 on the Sand Butte Coulee.
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Summary
With a height of 33 feet and a length of 840 feet, the dam has a storage capacity of 437 acre-feet, providing vital water resources for the surrounding area. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected, permitted, and enforced by state authorities to ensure its safety and functionality.
Despite its low hazard potential, Hook #55 plays a crucial role in supporting agricultural activities in the region by providing irrigation water to farmers. The dam's condition is currently not rated, and there is limited information available on its risk assessment and emergency preparedness measures. However, its strategic location on the Sand Butte Coulee makes it a key infrastructure for water management in the area, highlighting the importance of maintaining and monitoring its stability for long-term sustainability.
As a part of the Omaha District, Hook #55 stands as a testament to the importance of water resource management in mitigating the impacts of climate change. With its primary purpose being irrigation, the dam serves as a lifeline for local farmers and contributes to the overall resilience of the community in the face of evolving climatic conditions. As water resource and climate enthusiasts, understanding the significance of infrastructure like Hook #55 is essential in promoting sustainable practices and safeguarding the future of water availability in the region.
Year Completed |
1958 |
Dam Length |
840 |
Dam Height |
33 |
River Or Stream |
SAND BUTTE COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
33 |
Nid Storage |
437 |
Hazard Potential |
Low |
Nid Height |
33 |
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.
Hook #55