Pishkun Dike 2 Reservoir Report
Nearby: Pishkun Dike 1 Pishkun Dike 8
Last Updated: December 5, 2025
Pishkun Dike 2 is a significant earth dam located in Choteau, Montana, with a primary purpose of irrigation.
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Summary
Built in 1931 by the Bureau of Reclamation, this Federal-owned structure stands at 35 feet in height, with a hydraulic height of 22 feet and a length of 1000 feet. It has a storage capacity of 46,670 acre-feet and covers a surface area of 1550 acres, serving the surrounding area with water from the Deep Creek TR.
Despite its age, Pishkun Dike 2 has a high hazard potential due to its condition assessment being listed as "Not Available" and its risk assessment being categorized as high. The dam has not been modified in recent years, and its last inspection was conducted in September 2020. While it lacks a spillway, its emergency action plan (EAP) was last revised in November 2014, indicating some level of preparedness in case of a potential emergency.
With seven associated structures and a history of Federal oversight by the Bureau of Reclamation, Pishkun Dike 2 remains a crucial component of the local water resource infrastructure. Its location in Teton County, Montana, highlights its importance in providing irrigation water to the region, making it a key asset for water resource and climate enthusiasts to monitor for potential risks and management measures in the future.
Year Completed |
1931 |
Dam Length |
1000 |
Dam Height |
35 |
River Or Stream |
DEEP CREEK TR |
Primary Dam Type |
Earth |
Surface Area |
1550 |
Hydraulic Height |
22 |
Drainage Area |
6208 |
Nid Storage |
46670 |
Structural Height |
22 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Pishkun Dike 2