Way Reservoir Report

Last Updated: December 5, 2025

Way (also known as Michigamme Reservoir) is a captivating hydroelectric dam located in Iron Mountain, Michigan.


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Summary

Built in 1941, this concrete structure stands at a height of 47 feet and has a structural height of 73 feet, with a storage capacity of 125,350 acre-feet. The dam serves multiple purposes including flood risk reduction, hydroelectric power generation, and recreation, making it a vital resource for the region.

Managed by the Federal Energy Regulatory Commission (FERC), Way Dam boasts a controlled spillway with a width of 82 feet and can discharge up to 17,000 cubic feet per second. The dam's hazard potential is classified as high, with a very high risk assessment rating of 1. Despite its age, the condition assessment of the dam is not available, indicating a need for further evaluation to ensure its safety and reliability in the face of climate change and water resource management challenges.

With its rich history and significant role in the local ecosystem, Way Dam stands as a testament to the importance of sustainable water resource management and climate adaptation in the face of increasing risks and uncertainties. As climate enthusiasts and water resource advocates, it is crucial to monitor and assess the condition of such critical infrastructure to safeguard communities and ecosystems for generations to come.

Year Completed

1941

Dam Length

345

Dam Height

47

River Or Stream

Michigamme River

Primary Dam Type

Concrete

Surface Area

6400

Hydraulic Height

45

Drainage Area

645

Nid Storage

125350

Structural Height

73

Outlet Gates

Slide (sluice gate) - 3, Tainter (radial) - 3

Hazard Potential

High

Nid Height

73
       
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.