Pishkun Dike 6 Reservoir Report

Last Updated: December 5, 2025

Pishkun Dike 6, located in Choteau, Montana, is a federal-owned earth dam primarily used for irrigation purposes.


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Summary

Completed in 1931 by the Bureau of Reclamation, this dam stands at a height of 16 feet and spans 460 feet in length. With a storage capacity of 46,670 acre-feet and a surface area of 1,550 acres, Pishkun Dike 6 plays a crucial role in water management and agricultural sustainability in the region.

Despite its age, Pishkun Dike 6 is classified as having a high hazard potential due to its condition assessment not being available. The dam is regulated, inspected, and operated by the Bureau of Reclamation, with the last inspection conducted in September 2020. While the dam does not have a spillway, its hydraulic height of 5 feet and structural height of 16 feet indicate its importance in managing water flow and storage along Deep Creek TR. As a key component of the irrigation infrastructure in Teton County, Montana, Pishkun Dike 6 continues to be a critical resource for water resource and climate enthusiasts to monitor and support for sustainable water management practices.

Year Completed

1931

Dam Length

460

Dam Height

16

River Or Stream

DEEP CREEK TR

Primary Dam Type

Earth

Surface Area

1550

Hydraulic Height

5

Nid Storage

46670

Structural Height

16

Hazard Potential

High

Foundations

Rock

Nid Height

16
       
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.