Coventry Dry Dam Reservoir Report

Last Updated: December 5, 2025

Coventry Dry Dam, located in Allen, Indiana, stands as a crucial water resource infrastructure with a primary purpose of flood control.


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Summary

Built in 1974, this earth dam reaches a height of 17 feet and spans a length of 310 feet, with a storage capacity of 93 acre-feet. Despite its significant hazard potential and poor condition assessment, the dam has been inspected regularly by state regulatory agencies, ensuring its structural integrity and safety.

Situated along an unnamed tributary of Graham McCulloch Ditch Number One, Coventry Dry Dam plays a vital role in managing water flow and mitigating flood risks in the region. The dam's maximum discharge capacity of 1517 cubic feet per second underscores its importance in safeguarding downstream communities during heavy rainfall events. Although lacking a spillway, the dam has been designed to effectively contain and control water levels, reflecting a high level of risk management measures put in place by authorities.

As a privately owned structure regulated by the Indiana Department of Natural Resources, Coventry Dry Dam remains a key component of the local water management infrastructure. With a history of poor condition assessment and a high risk classification, ongoing inspections and maintenance efforts are essential to ensure the dam's continued functionality and protection of surrounding areas. Climate and water resource enthusiasts can appreciate the significance of Coventry Dry Dam in safeguarding the community against potential flooding events and the critical role it plays in maintaining water security in the region.

Year Completed

1974

Dam Length

310

Dam Height

17

River Or Stream

UNNAMED TRIBUTARY GRAHAM MCCULLOCH DITCH NUMBER ONE

Primary Dam Type

Earth

Hydraulic Height

13

Drainage Area

1.4

Nid Storage

93

Structural Height

13

Outlet Gates

None

Hazard Potential

Significant

Nid Height

17
       
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.