Gordon Reservoir Report

Last Updated: December 5, 2025

Gordon is a private water resource structure located in Mosby, Montana, along the TR-Bear Creek.


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Summary

Built in 1959, this earth dam stands at 15 feet tall and spans 300 feet in length, providing essential functions for fire protection, stock, and small fish pond purposes. Managed by the Montana Department of Natural Resources and Conservation (DNRC), Gordon is state-regulated, permitted, inspected, and enforced to ensure compliance with safety standards and regulations.

Despite its low hazard potential and ungraded condition assessment, Gordon offers a storage capacity of 89 acre-feet, with a normal storage level of 26 acre-feet. The structure's location in Fergus County, Montana, is overseen by the Omaha District of the US Army Corps of Engineers, under Congressional District 00 represented by Greg Gianforte. While lacking specific risk management measures and emergency response preparedness, Gordon serves as a vital resource for local water management and conservation efforts.

Water resource and climate enthusiasts interested in Gordon can appreciate its historical significance and functional role in the local ecosystem. With its modest size and multiple purposes, Gordon embodies the importance of sustainable water infrastructure for maintaining natural habitats, supporting agricultural activities, and safeguarding against potential emergencies. As part of the broader network of water structures in Montana, Gordon stands as a testament to the ongoing efforts to balance human needs with environmental stewardship in the face of changing climate patterns and resource challenges.

Year Completed

1959

Dam Length

300

Dam Height

15

River Or Stream

TR-BEAR CREEK

Primary Dam Type

Earth

Hydraulic Height

15

Nid Storage

89

Hazard Potential

Low

Nid Height

15
       
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.