Mogadore Reservoir Dam Reservoir Report

Last Updated: December 5, 2025

Mogadore Reservoir Dam, located in Springfield, Ohio, is a vital water resource structure designed by F.A.


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Summary

Barbour Consulting Engineers and completed in 1938. This earth dam stands at a height of 36 feet and spans 640 feet, with a primary purpose of recreation. The dam holds a storage capacity of 21,000 acre-feet, with a normal storage of 7,000 acre-feet and a surface area of 1,401 acres, making it a significant feature in the region.

Managed by the local government and regulated by the Ohio Department of Natural Resources, the dam poses a high hazard potential and is currently assessed to be in poor condition as of the last inspection in June 2018. With a drainage area of 13.2 square miles and a maximum discharge capacity of 3,679 cubic feet per second, the dam serves a critical role in flood control and water storage for the Little Cuyahoga River. Despite its condition assessment, Mogadore Reservoir Dam remains a key structure for water resource management and climate resilience in the region.

Enthusiasts of water resources and climate sustainability can appreciate the historical significance and engineering feat of Mogadore Reservoir Dam. With its contribution to recreation, flood control, and water storage, the dam plays a crucial role in the ecosystem and community of Portage County, Ohio. As efforts continue to assess and manage the dam's condition and potential risks, its importance as a water resource structure underscores the need for continued monitoring and maintenance to ensure its long-term functionality and resilience in the face of changing climate conditions.

Year Completed

1938

Dam Length

640

Dam Height

36

River Or Stream

LITTLE CUYAHOGA RIVER

Primary Dam Type

Earth

Surface Area

1401

Drainage Area

13.2

Nid Storage

21000

Hazard Potential

High

Nid Height

36
       
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.