Equinus (Legendary Run) Lake Dam Reservoir Report

Last Updated: December 5, 2025

Equinus (Legendary Run) Lake Dam, located in Clermont, Ohio, is a privately owned Earth dam completed in 2001 for water supply purposes.


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Summary

Standing at a height of 45.3 feet, with a length of 280 feet, the dam has a storage capacity of 78 acre-feet and a normal storage of 49 acre-feet. The dam is situated in the Ohio River city and is regulated by the Department of Natural Resources in Ohio.

With a high hazard potential, the dam has been assessed to be in satisfactory condition as of April 2018. Regular inspections are conducted every 5 years to ensure its safety and integrity. The dam's primary purpose is to serve as a water supply source, with a drainage area of 0.17 square miles and a maximum discharge capacity of 1689 cubic feet per second.

Despite being a private structure, Equinus (Legendary Run) Lake Dam plays a crucial role in water resource management in the region. Its construction and management are vital for ensuring a stable water supply and mitigating potential hazards associated with its operation. Enthusiasts of water resources and climate will find this dam's design and functionality intriguing in the context of sustaining water availability in the area.

Year Completed

2001

Dam Length

280

Dam Height

45.3

River Or Stream

TRIBUTARY TO NINEMILE CREEK

Primary Dam Type

Earth

Surface Area

3.9

Drainage Area

0.17

Nid Storage

78

Hazard Potential

High

Nid Height

45
       
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.