Cinnamon Lake Dam Reservoir Report

Last Updated: December 5, 2025

Cinnamon Lake Dam, located in Ashland, Ohio, is a privately owned structure that serves primarily for recreation purposes.


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Summary

Built in 1970, this earth dam stands at a height of 45 feet and spans 3075 feet in length. With a maximum storage capacity of 3577 acre-feet and a normal storage of 1480 acre-feet, the dam sits on the Muddy Fork river and covers a surface area of 161 acres.

Managed by the Department of Natural Resources in Ohio, Cinnamon Lake Dam has a high hazard potential and is classified as being in fair condition as of the last assessment in October 2019. The dam undergoes inspections every five years to ensure its safety and functionality. In case of emergencies, there are plans in place to manage any risks posed by the dam, though further details about emergency preparedness are not available at this time.

For water resource and climate enthusiasts, Cinnamon Lake Dam offers a fascinating insight into the intersection of human engineering and natural landscapes. With its recreational purpose and potential environmental impact, this dam serves as a valuable case study for understanding the complexities of managing water resources in a changing climate. The dam's location on the Muddy Fork river adds to its significance, highlighting the interconnectedness of water systems in the region and the need for sustainable water management practices.

Year Completed

1970

Dam Length

3075

Dam Height

45

River Or Stream

MUDDY FORK

Primary Dam Type

Earth

Surface Area

161

Drainage Area

3.41

Nid Storage

3577

Hazard Potential

High

Nid Height

45
       
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.