Lake Waynoka Upground Reservoir Reservoir Report
Last Updated: December 5, 2025
Lake Waynoka Upground Reservoir in Arnheim, Ohio, is a vital water supply source managed by the local government.
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Summary
The reservoir was completed in 1973 and has a dam height of 23 feet, a length of 3200 feet, and a storage capacity of 167 acre-feet. Its primary purpose is water supply, serving the surrounding area with a normal storage capacity of 123 acre-feet over its 11.5-acre surface area.
The reservoir is regulated by the Ohio Department of Natural Resources and undergoes regular inspections to ensure its structural integrity. Although it has a significant hazard potential, its condition was assessed as satisfactory during the last inspection in May 2018. The reservoir is located near Sycamore Run and is essential for managing water resources in the region, with a drainage area of 0.02 square miles and a maximum discharge capacity of 5 cubic feet per second.
Lake Waynoka Upground Reservoir plays a crucial role in water management in Brown County, Ohio, providing a reliable water supply for the community. With its earth dam structure and strategic location, the reservoir contributes to flood control and water storage efforts in the area. Climate and water resource enthusiasts will appreciate the reservoir's design and operation, ensuring water sustainability in the region while meeting regulatory standards for dam safety and management.
Year Completed |
1973 |
Dam Length |
3200 |
Dam Height |
23 |
River Or Stream |
SYCAMORE RUN - OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
11.5 |
Drainage Area |
0.02 |
Nid Storage |
167 |
Hazard Potential |
Significant |
Nid Height |
23 |
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 Upground Reservoir