Hoist Reservoir Report

Last Updated: December 5, 2025

Hoist is a hydroelectric dam located in Marquette, Michigan, along the Dead River.


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Summary

Completed in 1941, this structure stands at a height of 65 feet and has a dam length of 3,642 feet. With a maximum storage capacity of 41,666 acre-feet and a normal storage capacity of 31,563 acre-feet, this dam serves multiple purposes including hydroelectric power generation and recreation.

Managed by the Federal Energy Regulatory Commission, Hoist poses a high hazard potential and has a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 440 feet and one other controlled outlet gate. Despite its age, the condition assessment of Hoist is currently not available, highlighting the need for ongoing monitoring and maintenance to ensure its safety and efficiency.

Water resource and climate enthusiasts will find Hoist to be a fascinating structure, combining historic significance with modern functionality. Its location in the picturesque surroundings of Marquette, Michigan adds to its appeal, offering opportunities for recreation and appreciation of the vital role it plays in generating clean energy for the region. As efforts to address climate change continue to gain momentum, the role of dams like Hoist in sustainable water resource management becomes increasingly important.

Year Completed

1941

Dam Length

3642

Dam Height

63

River Or Stream

Dead River

Surface Area

2429

Hydraulic Height

63

Drainage Area

138

Nid Storage

41666

Structural Height

65

Outlet Gates

Other Controlled - 1

Hazard Potential

High

Nid Height

65
       
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.