Crow #71 Reservoir Report

Last Updated: December 5, 2025

Crow #71 is a dam located in Big Horn, Montana, with a height of 25 feet and a storage capacity of 82 acre-feet.


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Summary

Constructed in 1960 by the DOI BIA, this dam serves a primary purpose that is not specified in the data. The dam is situated in a low hazard area, with condition assessment information not available at this time.

Despite being a relatively small structure with limited information available, Crow #71 holds significance for water resource and climate enthusiasts in Montana. The dam's location in Big Horn County and its association with the Omaha District of the USACE adds to its importance in the region. The fact that the dam is not state-regulated or inspected may raise questions about its maintenance and long-term sustainability in the face of changing climate patterns and increasing water demands.

As a part of the larger network of dams and reservoirs in Montana, Crow #71 showcases the intersection of water resource management, infrastructure development, and environmental considerations. The lack of detailed data on the dam's purposes, design, and condition highlights the need for transparency and comprehensive monitoring of such critical structures to ensure their resilience in the face of evolving climate challenges. Water resource and climate enthusiasts may find Crow #71 to be a compelling case study for examining the complexities of managing water infrastructure in a changing world.

Year Completed

1960

Dam Height

25

Nid Storage

82

Hazard Potential

Low

Nid Height

25
       
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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.