Ellis Lake No. 2 Dam Reservoir Report
Last Updated: December 21, 2025
Ellis Lake No.
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Summary
2 Dam, located in Tiffin, Ohio, was completed in 1955 and serves as a vital water resource for recreation purposes in the area. This private-owned Earth dam stands at a height of 24.7 feet and has a storage capacity of 74.4 acre-feet. The dam spans 270 feet in length and covers a surface area of 6.6 acres, with a drainage area of 0.07 square miles.
Managed by the Department of Natural Resources in Ohio, Ellis Lake No. 2 Dam poses a significant hazard potential, although it was assessed to be in fair condition as of June 2018. The dam is subject to regular inspections, with the last one taking place in June 2018. With a normal storage capacity of 44.9 acre-feet, the dam plays a crucial role in managing water resources in the region and contributes to the overall environmental landscape, including the tributary to Porcupine Creek.
For water resource and climate enthusiasts, Ellis Lake No. 2 Dam stands out as a key infrastructure supporting recreational activities while also highlighting the importance of dam maintenance and inspection to ensure safety and water management efficiency. Its presence in Wyandot County, Ohio, reflects the intricate balance between human-made structures and natural ecosystems, underscoring the need for sustainable water resource management practices in the face of changing climate conditions.
Year Completed |
1955 |
Dam Length |
270 |
Dam Height |
24.7 |
River Or Stream |
TRIBUTARY TO PORCUPINE CREEK |
Primary Dam Type |
Earth |
Surface Area |
6.6 |
Drainage Area |
0.07 |
Nid Storage |
74.4 |
Hazard Potential |
Significant |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sandusky River Near Upper Sandusky Oh
|
880cfs |
Tymochtee Creek At Crawford Oh
|
105cfs |
Honey Creek At Melmore Oh
|
273cfs |
Sandusky River Near Bucyrus Oh
|
97cfs |
Sandusky River At Tiffin Oh
|
2870cfs |
Rock Creek At Tiffin Oh
|
8cfs |
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.
Ellis Lake No. 2 Dam