Rayls Lake Dam Reservoir Report
Last Updated: December 17, 2025
Rayls Lake Dam, located in Glenmoor, Ohio, is a privately owned earth dam that was completed in 1955 for recreational purposes.
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Summary
With a height of 22.4 feet and a storage capacity of 65.2 acre-feet, the dam serves as a popular destination for water resource and climate enthusiasts in Columbiana County. Despite its significant hazard potential and poor condition assessment, the dam is regularly inspected by the Department of Natural Resources to ensure public safety.
The dam, which is situated on a tributary to Long Run, covers a surface area of 7 acres and has a drainage area of 0.48 square miles. Its maximum discharge capacity is 394 cubic feet per second, making it crucial to monitor its integrity and maintenance. Although there are no associated structures or locks, the dam's importance for recreation and water storage highlights the need for ongoing regulatory oversight and enforcement to address any potential risks or issues that may arise.
As part of the Pittsburgh District, Rayls Lake Dam falls under the jurisdiction of the state regulatory agency, with inspections occurring every five years to assess its safety and condition. While the dam's poor condition and significant hazard potential raise concerns, its role in providing recreational opportunities and water storage underscores the importance of proactive management and maintenance to mitigate any potential risks to the surrounding community and environment.
Year Completed |
1955 |
Dam Length |
425 |
Dam Height |
22.4 |
River Or Stream |
TRIBUTARY TO LONG RUN |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.48 |
Nid Storage |
65.2 |
Hazard Potential |
Significant |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Beaver Creek Near East Liverpool Oh
|
254cfs |
Yellow Creek Near Hammondsville Oh
|
41cfs |
Raccoon Creek At Moffatts Mill
|
64cfs |
Kings Creek At Weirton
|
15cfs |
Beaver River At Beaver Falls
|
1730cfs |
Beaver River At Wampum
|
1280cfs |
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.
Rayls Lake Dam