Way Dike G Reservoir Report

Last Updated: December 5, 2025

Way Dike G is a crucial part of Michigan's water resource infrastructure, serving as a key component in flood risk reduction, hydroelectric power generation, and recreational activities.


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Summary

Located on the Michigamme River in Iron Mountain, this earth dam stands at 15 feet tall and stretches over 1205 feet in length. Built in 1941, it has a storage capacity of 125,350 acre-feet and covers a surface area of 6400 acres, with a drainage area of 645 square miles.

Managed by the Federal Energy Regulatory Commission, Way Dike G has a high hazard potential and is considered to be at risk for potential incidents. Despite its critical role in water resource management, the condition assessment of the dam is currently listed as "Not Available," highlighting the importance of regular inspections and maintenance to ensure the safety and stability of the structure. Emergency action plans are in place, with the last revision in 2005, but there is room for improvement in terms of meeting guidelines and preparing inundation maps.

As water resource and climate enthusiasts, it is essential to recognize the significance of dams like Way Dike G in maintaining the balance between water management, energy production, and recreation. By staying informed about the condition and risk assessment of such infrastructure, we can advocate for proper maintenance and emergency preparedness measures to safeguard both the environment and local communities that rely on these resources.

Year Completed

1941

Dam Length

1205

Dam Height

15

River Or Stream

Michigamme River

Primary Dam Type

Earth

Surface Area

6400

Drainage Area

645

Nid Storage

125350

Hazard Potential

High

Nid Height

15
       
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.