Peavy Falls Reservoir Report

Last Updated: December 5, 2025

Peavy Falls, also known as Peavy Pond, is a captivating hydroelectric structure located in Iron Mountain, Michigan.


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Summary

Built in 1943 by Holland Ackerman Holland, this concrete dam stands at a towering 78 feet in height with a hydraulic height of 96 feet, making it a remarkable feat of engineering. With a normal storage capacity of 34,250 acre-feet and a surface area of 3,160 acres, Peavy Falls plays a crucial role in providing hydroelectric power and recreational opportunities to the surrounding area.

Situated on the Michigamme River and managed by the Federal Energy Regulatory Commission, Peavy Falls boasts a controlled spillway with a width of 82 feet and a maximum discharge capacity of 15,500 cubic feet per second. Despite its high hazard potential, the dam's risk assessment is rated as very high, indicating the need for vigilant monitoring and management. With its striking design and significant contribution to water resource management, Peavy Falls stands as a testament to the intersection of human innovation and environmental sustainability in the face of climate challenges.

For water resource and climate enthusiasts, Peavy Falls serves as a fascinating example of the intricate balance between harnessing renewable energy sources and protecting natural ecosystems. As a key player in the region's energy infrastructure and water management system, this hydroelectric structure represents a harmonious blend of functionality and environmental stewardship. Its rich history, impressive specifications, and critical role in both energy production and recreational activities make Peavy Falls a must-visit destination for those interested in the intersection of water resources, climate resilience, and sustainable development.

Year Completed

1943

Dam Length

770

Dam Height

78

River Or Stream

Michigamme River

Primary Dam Type

Concrete

Surface Area

3160

Hydraulic Height

96

Drainage Area

715

Nid Storage

34250

Structural Height

73.8

Outlet Gates

Slide (sluice gate) - 2, Tainter (radial) - 3

Hazard Potential

High

Nid Height

96
       
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.