Hannibal Dam is a concrete dam located in Oswego County, New York, built in 1907. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 110 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Hannibal Dam
The primary purpose of Hannibal Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Village of Hannibal (local government). It impounds the Ninemile Creek.
The dam stands 10 feet tall and stretches 110 feet across, creates a reservoir covering 3 acres, has a storage capacity of 10 acre-feet, and collects water from a drainage area of 22 square miles. Completed in 1907, the structure is over a century 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 05/19/2017.
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Location
| State | New York |
| County | Oswego |
| Nearest City | None |
| River/Stream | Ninemile Creek |
| Coordinates | 43.32417, -76.57917 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 110 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 10 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 22 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Village of Hannibal |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/19/2017 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY11399 |
| Federal ID | NY11399 |
| More Info | State Dam Safety Program |