Lake Waynoka Retention Dam Reservoir Report
Last Updated: December 5, 2025
Lake Waynoka Retention Dam, located in Arnheim, Ohio, is a vital water supply infrastructure designed by Robert C.
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Summary
Daniel and American Realty Service Corp. The dam, completed in 1973, stands at a height of 32.1 feet and stretches 370 feet in length, with a storage capacity of 296 acre-feet. Situated along Sycamore Run, the dam serves the primary purpose of water supply, providing a normal storage capacity of 89 acre-feet to the surrounding area.
Managed by the Department of Natural Resources in Ohio, Lake Waynoka Retention Dam is regulated, inspected, and enforced by state authorities to ensure its structural integrity and operational safety. With a significant hazard potential but a satisfactory condition assessment as of May 2018, the dam plays a crucial role in managing water resources and mitigating flood risks in the region. Its location in Brown County, Ohio, highlights its importance in maintaining a sustainable water supply for the community.
Despite its age, Lake Waynoka Retention Dam continues to meet the guidelines for emergency action plans, although updates to contact information and risk assessments may be necessary. With a history of successful operation and maintenance, the dam stands as a testament to effective water resource management in Ohio. Enthusiasts of water resources and climate resilience can appreciate the vital role that Lake Waynoka Retention Dam plays in safeguarding water supply and managing flood risks in the region.
Year Completed |
1973 |
Dam Length |
370 |
Dam Height |
32.1 |
River Or Stream |
SYCAMORE RUN |
Primary Dam Type |
Earth |
Surface Area |
11.4 |
Drainage Area |
0.73 |
Nid Storage |
296 |
Hazard Potential |
Significant |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Lake Waynoka Retention Dam