Clendening Dam Reservoir Report
Last Updated: December 5, 2025
Clendening Dam, also known as Clendening Lake, is a federal-owned structure located in Harrison County, Ohio.
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Summary
Completed in 1936, the dam serves primarily for flood risk reduction, but also supports fish and wildlife pond creation and recreational activities. With a hydraulic height of 57 feet and a structural height of 64 feet, the dam spans 950 feet in length and has a storage capacity of 54,000 acre-feet.
Despite its age, Clendening Dam is actively managed and monitored by the US Army Corps of Engineers to ensure its safety and reliability. A risk assessment conducted in 2016 classified the dam's failure risk as moderate, highlighting potential impacts on downstream communities in Ohio. To manage this risk, the Corps implements a range of measures such as regular inspections, instrumentation monitoring, and emergency response training with local and state agencies. An Interim Risk Reduction Measures Plan is also being implemented to address specific risk concerns while long-term remedial actions are pursued.
With a focus on improving dam robustness and emergency preparedness, Clendening Dam represents a critical piece of infrastructure that is being actively managed to safeguard communities and water resources in the region. The ongoing efforts to enhance risk management and emergency response capabilities demonstrate a commitment to ensuring the safety and resilience of this vital water resource structure.
Year Completed |
1936 |
Dam Length |
950 |
River Or Stream |
BRUSHY FK OF STILLWATER CK |
Primary Dam Type |
Earth |
Surface Area |
1800 |
Hydraulic Height |
57 |
Drainage Area |
69 |
Nid Storage |
54000 |
Structural Height |
64 |
Outlet Gates |
Slide (sluice gate) - 3 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
64 |
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.
Clendening Dam