Insanity Reservoir Report

Last Updated: December 5, 2025

Insanity is a privately owned dam located in the scenic state of Montana, specifically in Blaine County near the city of Savoy.


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Summary

Built in 1955, this earth dam stands at 10 feet tall and spans a length of 300 feet, providing essential water storage for fire protection, livestock, and small fish ponds. Situated on the TR-West Fork Savoy Creek, the dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), ensuring proper oversight and maintenance.

Despite its low hazard potential and not yet rated condition assessment, Insanity serves as a vital resource for the local community and surrounding areas. Its maximum storage capacity of 103 acre-feet and normal storage of 53 acre-feet contribute to water security in times of need. With a focus on fire protection and agricultural use, this dam plays a crucial role in sustaining water resources and supporting the diverse ecosystem of the region.

As water resource and climate enthusiasts, understanding the importance of structures like Insanity is key to safeguarding our natural environment and promoting sustainable water management practices. By recognizing the value of dams for multiple purposes, including emergency preparedness and ecological balance, we can work towards a more resilient and water-secure future for all. Let Insanity serve as a reminder of the interconnectedness between water resources, climate patterns, and community well-being.

Year Completed

1955

Dam Length

300

Dam Height

10

River Or Stream

TR-WEST FORK SAVOY CREEK

Primary Dam Type

Earth

Hydraulic Height

10

Nid Storage

103

Hazard Potential

Low

Nid Height

10
       
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.