Hunters Run Structure No. R-63 Reservoir Report

Last Updated: December 5, 2025

Hunters Run Structure No.


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Summary

R-63, also known as Greenfield Lake, is a local government-owned dam located in Fairfield, Ohio. Built in 1961 by the USDA NRCS, this earth dam serves as a crucial flood risk reduction measure on a tributary to the Hocking River. With a height of 29.7 feet and a length of 415 feet, the dam has a storage capacity of 210.8 acre-feet, making it a significant structure in the area.

Despite its importance in mitigating flood risks, Hunters Run Structure No. R-63 is currently assessed as being in poor condition as of its last inspection in May 2017. The dam is classified as having a significant hazard potential and a moderate risk level (3), emphasizing the need for regular maintenance and potential risk management measures. The dam's emergency action plan (EAP) status and adherence to guidelines remain unclear, highlighting the importance of ensuring preparedness and safety measures for this critical infrastructure.

With its location in a high-risk area and its outdated condition assessment, Hunters Run Structure No. R-63 serves as a reminder of the ongoing challenges faced in managing water resources and climate-related risks. As water resource and climate enthusiasts, staying informed and advocating for the necessary upkeep and improvements of such infrastructure is crucial for the safety and resilience of communities in the face of changing environmental conditions.

Year Completed

1961

Dam Length

415

Dam Height

29.7

River Or Stream

TRIBUTARY TO HOCKING RIVER

Primary Dam Type

Earth

Surface Area

12.3

Drainage Area

0.87

Nid Storage

210.8

Outlet Gates

Uncontrolled

Hazard Potential

Significant

Foundations

Soil

Nid Height

30
       
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.