Conesville Plant Ash Pond Complex Reservoir Report
Last Updated: December 5, 2025
The Conesville Plant Ash Pond Complex in Coshocton, Ohio, is a significant tailings dam managed by a public utility.
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Summary
This complex, with a dam height of 35 feet and a storage capacity of 2518 acre-feet, plays a crucial role in storing waste materials from the Conesville Plant. The dam, constructed with earth materials, spans a length of 9850 feet and covers a surface area of 82 acres.
Regulated by the Department of Natural Resources in Ohio, the Conesville Plant Ash Pond Complex has a fair condition assessment as of October 2018. With a significant hazard potential, this dam undergoes inspections every five years to ensure its structural integrity and safety. The complex also meets state permitting and enforcement requirements, showcasing a commitment to environmental stewardship and compliance with regulatory standards.
Located offstream in the Huntington District, the Conesville Plant Ash Pond Complex serves as a critical infrastructure for managing tailings and waste materials from the Conesville Plant. With its fair condition, significant hazard potential, and state-regulated status, this complex underscores the importance of responsible water resource management and climate resilience in the region.
Dam Length |
9850 |
Dam Height |
35 |
River Or Stream |
OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
82 |
Drainage Area |
0.15 |
Nid Storage |
2518 |
Hazard Potential |
Significant |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Conesville Plant Ash Pond Complex