Gallery Lake Dam Reservoir Report

Last Updated: December 5, 2025

Gallery Lake Dam, located in Columbia Station, Ohio, is a private earth dam primarily used for recreation purposes.


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Summary

The dam stands at a height of 12.4 feet and spans a length of 450 feet, creating a surface area of 10 acres. With a normal storage capacity of 35.8 acre-feet and a maximum storage of 82.6 acre-feet, the dam plays a crucial role in regulating water levels in the area and providing opportunities for water-based activities.

The dam is under state regulation by the Department of Natural Resources, ensuring that it is regularly inspected and maintained to meet safety standards. However, recent assessments have classified the dam's condition as poor, indicating a need for potential improvements to mitigate its significant hazard potential. The last inspection took place in October 2018, with a scheduled frequency of every 5 years.

Located in the Medina County of Ohio and serving as a tributary to Plum Creek, Gallery Lake Dam is not only a recreational hotspot but also a vital component of the local water resource infrastructure. As climate change continues to impact water availability and quality, the proper management and maintenance of dams like Gallery Lake Dam are essential to ensure the resilience and sustainability of water resources in the region.

Dam Length

450

Dam Height

12.4

River Or Stream

TRIBUTARY TO PLUM CREEK

Primary Dam Type

Earth

Surface Area

10

Drainage Area

0.21

Nid Storage

82.6

Hazard Potential

Significant

Nid Height

12
       
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.