Pishkun Dike 4 Reservoir Report

Last Updated: December 5, 2025

Pishkun Dike 4 is a federal-owned water infrastructure located in Choteau, Montana, along Deep Creek TR.


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Summary

Built in 1931 by the Bureau of Reclamation, this earth dam stands at a height of 30 feet and serves primarily for irrigation purposes. With a storage capacity of 46,670 acre-feet and a surface area of 1,550 acres, Pishkun Dike 4 plays a crucial role in water resource management in the region.

Despite its age, Pishkun Dike 4 has undergone structural modifications in 1998 to enhance its resilience. The dam is classified as having a high hazard potential, necessitating regular inspections and risk assessments. The Bureau of Reclamation is responsible for the operation, maintenance, and regulatory oversight of this vital water infrastructure. However, the condition assessment of Pishkun Dike 4 is currently listed as not available, highlighting the need for continued monitoring and maintenance to ensure its safety and functionality.

As a key component of the water supply infrastructure in Teton County, Montana, Pishkun Dike 4 serves as a critical resource for irrigation and water storage. With its high hazard potential and risk assessment, it is essential for federal agencies like the Bureau of Reclamation to prioritize the dam's maintenance and safety to safeguard the surrounding communities and agricultural lands. Monitoring and regular inspections are crucial to ensure the integrity and reliability of Pishkun Dike 4 for the sustainable management of water resources in the region.

Years Modified

1998 - Structural

Year Completed

1931

Dam Length

1580

Dam Height

30

River Or Stream

DEEP CREEK TR

Primary Dam Type

Earth

Surface Area

1550

Hydraulic Height

38

Nid Storage

46670

Structural Height

38

Hazard Potential

High

Foundations

Rock

Nid Height

38
       
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.