St. Henry Wwt Lagoon
Key Takeaway
St. Henry Wwt Lagoon is classified as significant hazard in Ohio. It was completed in 1988 and is 38 years old. Its primary use is tailings. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 27 ft (taller than 51.3% in OH) |
| Dam Length | 5,540 ft |
| Dam Type | Earth |
| Max Storage | 501 acre-ft |
| Normal Storage | 395 acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 20 cfs |
| Year Completed | 1988 (38 years old) |
| NID ID | OH02727 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Village of St. Henry
Local Government
Nearby Dams
Coldwater Wastewater Treatment Dam
Mercer, OH
Significant Hazard 25 ftUpper Wabash Structure No. 2
Mercer, OH
Low Hazard 17 ftMontezuma/Club Island Wwt Lagoons
Mercer, OH
Significant Hazard 17 ftMontezuma Club Island Wwt Lagoon Cell 4
Mercer, OH
Significant Hazard 17 ftBar-E Club Lake Dam
Darke, OH
Low Hazard 32 ftWabash Structure No. 1 Dam
Darke, OH
Significant Hazard 37 ftGrand Lake St. Marys - West Embankment
Mercer, OH
High Hazard 20 ftUpper Wabash Structure No. 3 Dam
Mercer, OH
High Hazard 28 ftFrequently Asked Questions
What is the hazard classification of St. Henry Wwt Lagoon?
St. Henry Wwt Lagoon is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates St. Henry Wwt Lagoon?
St. Henry Wwt Lagoon is owned by Village of St. Henry (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was St. Henry Wwt Lagoon built?
St. Henry Wwt Lagoon was completed in 1988, making it 38 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of St. Henry Wwt Lagoon?
St. Henry Wwt Lagoon serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is St. Henry Wwt Lagoon?
St. Henry Wwt Lagoon has a dam height of 27 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was St. Henry Wwt Lagoon last inspected?
St. Henry Wwt Lagoon was last inspected on October 17, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.