Cardinal Fly Ash No. 2 Dam Reservoir Report

Last Updated: December 6, 2025

The Cardinal Fly Ash No.


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Summary

2 Dam, also known as Fly Ash Reservoir No. 2, is a significant water resource structure located in Brilliant, Ohio. Built in 2014 by the American Electric Power Service Corp., this earth dam stands at a height of 250 feet and has a length of 1630 feet, with a storage capacity of 13,500 acre-feet. Situated on Blockhouse Run in Jefferson County, Ohio, this dam serves the primary purpose of tailings storage.

Managed by the Department of Natural Resources in Ohio, the Cardinal Fly Ash No. 2 Dam is subject to regular inspections and enforcement to ensure its safety and integrity. With a high hazard potential but a satisfactory condition assessment as of November 2017, this dam plays a crucial role in water management and flood control in the region. The dam also has a notable drainage area of 2.2 square miles and a maximum discharge capacity of 5,409 cubic feet per second.

Despite its high hazard potential, the Cardinal Fly Ash No. 2 Dam continues to provide essential water resource management services in Ohio. With its impressive storage capacity and strategic location on Blockhouse Run, this dam stands as a vital infrastructure for maintaining water quality, managing tailings, and safeguarding the surrounding areas from potential flooding events. As a key component of the state's water resource infrastructure, this dam underscores the importance of proactive maintenance and inspection to ensure public safety and environmental protection.

Year Completed

2014

Dam Length

1630

Dam Height

250

River Or Stream

BLOCKHOUSE RUN

Primary Dam Type

Earth

Surface Area

161

Drainage Area

2.2

Nid Storage

13500

Hazard Potential

High

Nid Height

250
       
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.