Ohio Power Company Pond Mb-115 Dam Reservoir Report

Last Updated: December 5, 2025

Ohio Power Company Pond Mb-115 Dam, located in Unionville, Ohio, is a private earth dam constructed in 1967 for the primary purpose of tailings storage.


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Summary

With a dam height of 55 feet and a length of 525 feet, this dam has a storage capacity of 115.8 acre-feet and serves to control a drainage area of 0.33 square miles, with a normal storage capacity of 80.4 acre-feet. The dam is situated on a tributary to Meigs Creek in Morgan County and falls under the regulatory jurisdiction of the Ohio Department of Natural Resources.

Despite being classified as having a significant hazard potential, Ohio Power Company Pond Mb-115 Dam is currently assessed as being in fair condition as of the last inspection in October 2018. The dam is subject to regular inspections every five years to ensure its structural integrity and safety. While specific risk management measures and emergency action plans are not detailed in the available data, the dam's condition assessment and hazard potential highlight the importance of ongoing monitoring and maintenance to mitigate potential risks to surrounding communities and the environment. Water resource and climate enthusiasts interested in the intersection of infrastructure and environmental management will find Ohio Power Company Pond Mb-115 Dam to be a compelling case study of dam safety and regulatory oversight in Ohio.

Year Completed

1967

Dam Length

525

Dam Height

55

River Or Stream

TRIBUTARY TO MEIGS CREEK

Primary Dam Type

Earth

Surface Area

7.2

Drainage Area

0.33

Nid Storage

115.8

Hazard Potential

Significant

Nid Height

55
       
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.