Hinman Dam Reservoir Report

Last Updated: December 5, 2025

Hinman Dam, located in the Lewis and Clark County of Montana, stands as a vital structure along the Beartooth Creek.


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Summary

Completed in the year 2000, this earth dam reaches a height of 34 feet and a length of 216 feet, providing a storage capacity of 21 acre-feet. The dam serves a primary purpose of "Other," indicating its role in water resource management and climate regulation in the region.

As a state-regulated and state-jurisdictional dam under the supervision of the Department of Natural Resources and Conservation (DNRC), Hinman Dam is subject to regular inspections and enforcement measures to ensure its safety and functionality. With a hazard potential rated as "High," the dam's condition assessment remains "Not Rated," highlighting the need for continued monitoring and risk management. The dam's emergency action plan (EAP) status and risk assessment information are currently unavailable, emphasizing the importance of preparedness and proactive measures in the face of potential hazards.

Despite its relatively small size, Hinman Dam plays a critical role in the local water supply and environmental conservation efforts. As climate change continues to impact water resources, the proper maintenance and management of dams like Hinman are essential for safeguarding communities and ecosystems against the challenges of a changing climate.

Year Completed

2000

Dam Length

216

Dam Height

34

River Or Stream

BEARTOOTH CREEK

Primary Dam Type

Earth

Hydraulic Height

30

Nid Storage

21

Structural Height

34

Hazard Potential

High

Nid Height

34
       
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.