Huffman Dam Reservoir Report

Last Updated: December 5, 2025

Huffman Dam, located in Greene County, Ohio, along the Mad River, stands as a crucial structure designed by the Miami Conservancy District in 1922 for the primary purpose of flood risk reduction.


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Summary

With a dam height of 73 feet and a length of 3340 feet, the reservoir has a storage capacity of 297,000 acre-feet, providing essential flood control measures for the surrounding area. The dam is regulated and inspected by the Ohio Department of Natural Resources to ensure its structural integrity and efficient operation.

Despite its age, Huffman Dam is assessed to be in fair condition with a high hazard potential, prompting a regular inspection frequency of every five years. The dam's Emergency Action Plan (EAP) is noted to have been last revised in June 2020, indicating ongoing efforts to maintain and update emergency preparedness measures. With a max discharge capacity of 204,186 cubic feet per second, the dam plays a vital role in mitigating flood risks and protecting the downstream communities, making it a significant asset for water resource and climate enthusiasts interested in sustainable water management practices.

Year Completed

1922

Dam Length

3340

Dam Height

73

River Or Stream

MAD RIVER

Primary Dam Type

Earth

Drainage Area

671

Nid Storage

297000

Hazard Potential

High

Nid Height

73
       
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.