Pishkun Dike 3 Reservoir Report

Last Updated: December 5, 2025

Pishkun Dike 3, located in Choteau, Montana, is a significant federal irrigation dam constructed in 1931 by the Bureau of Reclamation.


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Summary

With a height of 26 feet and a hydraulic height of 28 feet, this earth dam serves the primary purpose of irrigation, providing a storage capacity of 46,670 acre-feet for water from the Deep Creek TR. The dam, spanning 2,300 feet in length and covering a surface area of 1,550 acres, plays a crucial role in water resource management in the region.

Despite its age, Pishkun Dike 3 has been well-maintained by the Bureau of Reclamation, with regular inspections ensuring its structural integrity. Classified as having a high hazard potential and a high risk level, the dam remains a key component of the local water infrastructure. While the condition assessment is currently not available, the dam's emergency action plan was last revised in 2014, indicating proactive measures in place for any potential risks or emergencies.

As a vital piece of water infrastructure in Teton County, Montana, Pishkun Dike 3 stands as a testament to the importance of effective water resource management. With its impressive storage capacity and contribution to irrigation, the dam continues to play a crucial role in supporting agricultural activities and water availability in the region.

Year Completed

1931

Dam Length

2300

Dam Height

26

River Or Stream

DEEP CREEK TR

Primary Dam Type

Earth

Surface Area

1550

Hydraulic Height

28

Nid Storage

46670

Structural Height

28

Hazard Potential

High

Foundations

Rock

Nid Height

28
       
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.