Mc Clure Reservoir Report

Last Updated: December 5, 2025

Mc Clure is a historic hydroelectric dam located in Marquette, Michigan, along the Dead River.


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Summary

Built in 1919, this gravity and earth dam stands at a height of 64 feet and has a maximum storage capacity of 1870 acre-feet. With a surface area of 95 acres and a drainage area of 140.5 square miles, Mc Clure plays a crucial role in harnessing the power of water for hydroelectricity generation while also providing recreational opportunities for the surrounding community.

Managed by the Federal Energy Regulatory Commission, Mc Clure has a spillway width of 200 feet and a maximum discharge capacity of 22,280 cubic feet per second. Despite its high hazard potential, the dam is currently assessed to be in moderate risk condition. Regular inspections conducted by the FERC ensure the safety and integrity of the structure, with the last inspection taking place in September 2020. While Mc Clure does not have state jurisdiction or permitting requirements, it remains an essential piece of infrastructure for water resource management and climate resilience in the region.

As a key player in the water resource sector, Mc Clure symbolizes the intersection of sustainable energy production and environmental stewardship. Its historical significance, combined with its modern operational standards, highlights the importance of balancing human needs with natural resources. With a focus on hydroelectricity generation and recreational benefits, Mc Clure stands as a testament to the ingenuity and foresight of early dam builders, while also serving as a reminder of the ongoing efforts to adapt to changing climate conditions and ensure the safety of water infrastructure for future generations.

Year Completed

1919

Dam Length

405

Dam Height

46

River Or Stream

Dead River

Surface Area

95

Hydraulic Height

54

Drainage Area

140.5

Nid Storage

1870

Structural Height

64

Hazard Potential

High

Nid Height

64
       
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.