Candlewood Lake Dam Reservoir Report
Last Updated: December 26, 2025
Candlewood Lake Dam in Waterville, Ohio, is a privately owned structure designed by William R.
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Summary
Wumer in 1962. The dam stands at a height of 23.1 feet, with a storage capacity of 108.2 acre-feet. Its primary purpose is for recreation, offering a surface area of 10.7 acres and a drainage area of 2.1 square miles along Sister Creek.
Despite its recreational value, Candlewood Lake Dam poses a significant hazard potential with a poor condition assessment as of September 2017. The dam is regulated and inspected by the Ohio Department of Natural Resources, with state permitting, inspection, and enforcement in place. However, its condition raises concerns, highlighting the need for ongoing maintenance and potential risk management measures to ensure public safety.
Located in Wood County, Ohio, Candlewood Lake Dam is situated within the Detroit District of the US Army Corps of Engineers. With a notable presence in the region, the dam's structural integrity and hazard potential warrant close monitoring and proactive measures to address any potential risks associated with its operation and maintenance for the benefit of water resource and climate enthusiasts in the area.
Year Completed |
1962 |
Dam Length |
245 |
Dam Height |
23.1 |
River Or Stream |
SISTER CREEK |
Primary Dam Type |
Earth |
Surface Area |
10.7 |
Drainage Area |
2.1 |
Nid Storage |
108.2 |
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.
Candlewood Lake Dam
Mary Jane Thurston State Park