Us #25 Reservoir Report

Last Updated: December 6, 2025

Located in Garfield County, Montana, the Us #25 dam serves multiple purposes including fire protection, stock, and small fish pond management.


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Summary

Built in 1960, this private-owned earth dam stands at a height of 22 feet and has a storage capacity of 78 acre-feet. Situated on TR-McGinnis Creek, this structure is regulated by the Montana Department of Natural Resources and Conservation, ensuring proper inspection, permitting, and enforcement procedures are in place.

With a low hazard potential and a condition assessment of "Not Rated," the Us #25 dam is designed to provide essential services while maintaining safety standards. While specific details such as spillway type and maximum discharge are not provided, the dam's primary purpose of fire protection and water storage highlights its importance in the local community. The structure's location in Forsyth, Montana, underscores the critical role it plays in water resource management and climate resilience efforts within the region.

As a key infrastructure in Congressional District 00, Montana, the Us #25 dam is a significant component of the local water management system. Owned privately, this earth dam stands as a testament to the collaboration between private owners and state regulatory agencies in ensuring the safety and functionality of water structures. With its historical significance and ongoing relevance in providing essential services, the Us #25 dam serves as a vital resource for both the community and the environment in Garfield County, Montana.

Year Completed

1960

Dam Length

300

Dam Height

22

River Or Stream

TR-MCGINNIS CREEK

Primary Dam Type

Earth

Hydraulic Height

22

Nid Storage

78

Hazard Potential

Low

Nid Height

22
       
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.