Tycoon Lake Dam Reservoir Report

Last Updated: December 6, 2025

Tycoon Lake Dam, located in Gallia, Ohio, is a state-regulated structure owned by the Department of Natural Resources.


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Summary

Built in 1961, this earthen dam serves a primary purpose of recreation, offering a surface area of 176 acres for water enthusiasts to enjoy. With a dam height of 29.3 feet and a length of 1460 feet, the reservoir has a normal storage capacity of 2447 acre-feet and a maximum storage of 4078 acre-feet.

Despite its recreational appeal, Tycoon Lake Dam poses a high hazard potential and has been rated as being in poor condition during its last assessment in 2016. The dam is subject to regular inspections every five years, with its last inspection occurring in November 2016. With its proximity to Raccoon Creek, the dam's maintenance and upkeep are essential to ensuring the safety of the surrounding community. As climate change continues to impact water resources, the resilience and integrity of structures like Tycoon Lake Dam are crucial for mitigating potential risks and safeguarding the environment.

Year Completed

1961

Dam Length

1460

Dam Height

29.3

River Or Stream

TRIBUTARY TO RACCOON CREEK

Primary Dam Type

Earth

Surface Area

176

Drainage Area

1.56

Nid Storage

4078

Hazard Potential

High

Nid Height

29
       
Seasonal Comparison

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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.