Terraco Lake Dam Reservoir Report
Nearby: Mirror Lake Dam Ledge Lake Dam
Last Updated: December 26, 2025
Terraco Lake Dam, located in Weymouth, Ohio, is a private-owned structure regulated by the Department of Natural Resources.
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Summary
This earth dam, standing at 20 feet high and stretching 210 feet in length, serves primarily for recreational purposes, offering a serene surface area of 2.8 acres. Situated along a tributary to Granger Ditch, this dam holds a storage capacity of 22.5 acre-feet, with a normal storage level of 13.9 acre-feet.
Despite its scenic appeal, Terraco Lake Dam carries a significant hazard potential with a poor condition assessment as of May 2014. The last inspection in October 2018 revealed a need for improvement, indicating a need for frequent monitoring and maintenance. Even though it falls under private ownership, state regulatory agencies oversee its permitting, inspection, and enforcement processes. Recognized for its recreational value, this dam's risk assessment and management measures remain undisclosed, leaving room for potential enhancements in emergency preparedness and risk mitigation strategies.
As water resource and climate enthusiasts explore the beauty of Terraco Lake Dam, attention to its condition and safety measures is crucial. With a hazard potential deemed significant and a poor condition assessment, stakeholders must advocate for regular inspections, maintenance, and emergency preparedness to ensure the longevity and safety of this recreational structure. The collaboration between private ownership and state regulatory agencies highlights the importance of cooperation in safeguarding water resources and enhancing climate resilience in Ohio's Medina County.
Dam Length |
210 |
Dam Height |
20 |
River Or Stream |
TRIBUTARY TO GRANGER DITCH |
Primary Dam Type |
Earth |
Surface Area |
2.8 |
Drainage Area |
0.26 |
Nid Storage |
22.5 |
Hazard Potential |
Significant |
Nid Height |
20 |
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.
Terraco Lake Dam
Dam At Peninsula To End Of Canal Near Confluence With Chippewa Creek