Niagara Mohawk Power Dam is a concrete dam located in St. Lawrence County, New York, built in 1916. It carries a Significant hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 80 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 Niagara Mohawk Power Dam
The primary purpose of Niagara Mohawk Power Dam is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Erie Boulevard Hydropower, Lp/brookfield Renewable (private). It impounds the Oswegatchie River near Fine.
The dam stands 11 feet tall and stretches 80 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 48 acre-feet, and collects water from a drainage area of 275 square miles. Completed in 1916, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 07/29/1998. That was over 28 years ago.
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Location
| State | New York |
| County | St. Lawrence |
| Nearest City | Fine |
| River/Stream | Oswegatchie River |
| Coordinates | 44.27000, -75.19917 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 80 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Normal Storage | 23 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 275 sq mi |
| Max Discharge | 5,949 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Erie Boulevard Hydropower, Lp/brookfield Renewable |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/29/1998 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY12354 |
| Federal ID | NY12354 |
| More Info | State Dam Safety Program |