Attica Upground Reservoir Reservoir Report
Last Updated: December 5, 2025
The Attica Upground Reservoir in Seneca, Ohio, is a vital water supply resource owned by the local government.
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Summary
Constructed in 1955 by Floyd G. Browne & Associates, this earth dam stands at a height of 13.5 feet and has a storage capacity of 36.5 acre-feet. With a primary purpose of water supply, the reservoir serves the city of Caroline and its surrounding areas, drawing water from Honey Creek - Offstream.
Despite its importance, the Attica Upground Reservoir is facing challenges in terms of its condition assessment, which has been rated as poor. The dam's hazard potential is considered significant, highlighting the need for regular inspections and maintenance. The last inspection in May 2018 revealed areas of concern, prompting a closer look at the overall risk management measures in place to ensure the safety and security of the reservoir.
As water resource and climate enthusiasts, the Attica Upground Reservoir offers a fascinating case study in the intersection of infrastructure, environmental regulation, and public safety. Its location in Seneca, Ohio, amidst a drainage area of 0.01 square miles, underscores the importance of sustainable water management practices in the face of changing climate patterns. With its historical significance and current challenges, this reservoir serves as a reminder of the ongoing efforts required to safeguard our water resources for future generations.
Year Completed |
1955 |
Dam Length |
2470 |
Dam Height |
13.5 |
River Or Stream |
HONEY CREEK - OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
5.8 |
Drainage Area |
0.01 |
Nid Storage |
36.5 |
Hazard Potential |
Significant |
Nid Height |
14 |
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.
Attica Upground Reservoir