I & M Secondary Fly Ash Reservoir Reservoir Report

Last Updated: December 5, 2025

The I & M Secondary Fly Ash Reservoir in Dearborn, Indiana, is a privately owned structure regulated by the Indiana Department of Natural Resources.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1963, this earth dam stands at a height of 25 feet and stretches 4600 feet in length, with a storage capacity of 625 acre-feet. Situated along the Ohio River, this reservoir serves a primary purpose that is classified as "Other", with a low hazard potential and fair condition assessment.

Despite its age, the I & M Secondary Fly Ash Reservoir has been deemed to have a low risk potential and is regularly inspected to ensure its structural integrity. With a surface area of 37 acres and a drainage area of 0.08 square miles, this reservoir plays a crucial role in managing water resources in the region. Its location and purpose make it an important asset for water resource and climate enthusiasts interested in understanding the impact of human-made structures on the environment and surrounding ecosystems.

Year Completed

1963

Dam Length

4600

Dam Height

25

River Or Stream

OHIO RIVER

Primary Dam Type

Earth

Surface Area

37

Drainage Area

0.08

Nid Storage

625

Outlet Gates

Valve

Hazard Potential

Low

Nid Height

25
       
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.