Ansonia Sewage Lagoon I Reservoir Report
Last Updated: December 19, 2025
Ansonia Sewage Lagoon I in Ohio is a locally owned sewage treatment facility regulated by the Department of Natural Resources.
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Summary
Completed in 1970, this tailings dam stands at a height of 11.5 feet and has a storage capacity of 42 acre-feet, serving its primary purpose efficiently. With a drainage area of 0.02 square miles and a maximum discharge rate of 3 cubic feet per second, this offstream lagoon covers a surface area of 10 acres.
The dam's condition is assessed as fair, with a significant hazard potential according to the last inspection in 2019. Despite its age, Ansonia Sewage Lagoon I continues to operate effectively, meeting state regulations for permitting, inspection, and enforcement. The facility's emergency action plan status and risk management measures are not specified, indicating a need for further assessment and improvement. As a vital infrastructure for wastewater treatment in Darke County, Ohio, ongoing monitoring and maintenance are essential to ensure the safety and sustainability of this critical water resource.
In the picturesque city of Ansonia, the sewage lagoon serves a vital role in managing wastewater and protecting the local environment. With a focus on tailings management, this earth dam plays a crucial part in maintaining water quality and public health. The collaboration between local government, state agencies, and regulatory bodies ensures the efficient operation and compliance of Ansonia Sewage Lagoon I, contributing to the overall well-being of the community and the preservation of water resources in the region.
Year Completed |
1970 |
Dam Length |
3600 |
Dam Height |
11.5 |
River Or Stream |
OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
0.02 |
Nid Storage |
42 |
Hazard Potential |
Significant |
Nid Height |
12 |
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.
Ansonia Sewage Lagoon I