Montezuma/club Island Wwt Lagoons
Montezuma/club Island Wwt Lagoons is an earth dam located in Mercer County, Ohio, built in 1985. It carries a Significant hazard potential classification and has a fair condition assessment.
About Montezuma/club Island Wwt Lagoons
The primary purpose of Montezuma/club Island Wwt Lagoons is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Mercer County (local government). It impounds the Offstream - Beaver Creek near Montezuma.
The dam stands 17 feet tall and stretches 6,200 feet across, creates a reservoir covering 37 acres, has a maximum storage capacity of 420 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1985, the structure is 41 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 12/04/2024.
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Location
| State | Ohio |
| County | Mercer |
| Nearest City | Montezuma |
| River/Stream | Offstream - Beaver Creek |
| Coordinates | 40.47500, -84.54833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 6,200 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Max Storage | 420 acre-ft |
| Normal Storage | 215 acre-ft |
| Surface Area | 37 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | Mercer County |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/04/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OH02800 |
| Federal ID | OH02800 |
| More Info | State Dam Safety Program |