Jack Of Diamonds Reservoir Report

Last Updated: December 5, 2025

Jack of Diamonds is a private dam located in Carter, Montana, along the TR-Thompson Creek.


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Summary

Built in 1959, this earth dam stands at a height of 15 feet and has a storage capacity of 62 acre-feet, primarily serving the purposes of fire protection, stock, and small fish pond. With a low hazard potential, the dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is subject to regular inspections, permitting, and enforcement.

Situated in Lightning Flat Wyoming, Jack of Diamonds plays a crucial role in providing water resources for the surrounding area. While the dam's condition is currently not rated, its purpose and operational capabilities make it an integral part of the local ecosystem. With a focus on fire protection and supporting livestock and fisheries, this dam contributes to the sustainability and resilience of the region's water supply.

Owned privately, Jack of Diamonds offers a glimpse into the intersection of water resource management and climate adaptation. As water enthusiasts and climate advocates, understanding the importance of infrastructure like this dam is key to safeguarding water security in the face of changing environmental conditions. With its low hazard potential and state-regulated status, Jack of Diamonds stands as a testament to the balance between human needs and ecological stewardship in a changing climate landscape.

Year Completed

1959

Dam Length

175

Dam Height

15

River Or Stream

TR-THOMPSON CREEK

Primary Dam Type

Earth

Hydraulic Height

15

Nid Storage

62

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.