Heuvelton is a concrete dam located in St. Lawrence County, New York, built in 1923. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 284 ft long, taller than 80% of U.S. dams with a recorded height. 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 Heuvelton
The primary purpose of Heuvelton 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, L.p. (private). It impounds the Oswegatchie River near Heuvelton.
The dam stands 35 feet tall and stretches 284 feet across, creates a reservoir covering 239 acres, has a maximum storage capacity of 405 acre-feet, and collects water from a drainage area of 995 square miles. Completed in 1923, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/15/2022.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | New York |
| County | St. Lawrence |
| Nearest City | Heuvelton |
| River/Stream | Oswegatchie River |
| Coordinates | 44.61770, -75.40480 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 35 ft |
| Dam Height | 19 ft |
| Dam Length | 284 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 405 acre-ft |
| Max Storage | 405 acre-ft |
| Normal Storage | 405 acre-ft |
| Surface Area | 239 acres |
| Drainage Area | 995 sq mi |
| Max Discharge | 23,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Erie Boulevard Hydropower, L.p. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/15/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00411 |
| Federal ID | NY00411 |
| More Info | State Dam Safety Program |