Hook #24 Reservoir Report

Last Updated: December 6, 2025

Hook #24, located in Rosebud, Montana, is a privately owned earth dam completed in 1955 for fire protection, stock, and small fish pond purposes.


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Summary

With a height of 18 feet and a length of 300 feet, this dam has a storage capacity of 77 acre-feet. Situated on the TR-N Fork Cottonwood Creek, this structure is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected and enforced by the state agency.

Despite its low hazard potential, Hook #24 has not been rated for its condition assessment. The dam is not currently equipped with spillway type or width information, and there are no associated structures or outlet gates specified. The emergency action plan (EAP) status, inundation maps, risk assessment, and risk management measures for this dam are also not provided in the data.

For water resource and climate enthusiasts, Hook #24 presents an intriguing case study of a privately owned dam in Montana, highlighting the importance of regulatory oversight and maintenance of such structures for public safety and environmental protection. This dam serves multiple purposes in the local community and provides valuable storage capacity for fire protection and stock watering, while also potentially supporting small fish populations. Further assessment and documentation of its condition, emergency preparedness, and risk management measures could enhance the resilience of this structure in the face of changing climate conditions and potential hazards.

Year Completed

1955

Dam Length

300

Dam Height

18

River Or Stream

TR-N FORK COTTONWOOD CREEK

Primary Dam Type

Earth

Hydraulic Height

18

Nid Storage

77

Hazard Potential

Low

Nid Height

18
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.