Hailesboro #4 Plant Dam
Hailesboro #4 Plant Dam is a concrete dam located in St. Lawrence County, New York, built in 1912. It carries a Significant hazard potential classification.
About Hailesboro #4 Plant Dam
The primary purpose of Hailesboro #4 Plant 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 Hydro Development Group Incorporated (private). It impounds the Oswegatchie River near Hailesboro.
The dam stands 12 feet tall and stretches 95 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 28 acre-feet, and collects water from a drainage area of 680 square miles. Completed in 1912, 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 06/15/1995. That was over 30 years ago.
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Location
| State | New York |
| County | St. Lawrence |
| Nearest City | Hailesboro |
| River/Stream | Oswegatchie River |
| Coordinates | 44.31083, -75.44472 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 95 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 28 acre-ft |
| Max Storage | 28 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 680 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | HYDRO DEVELOPMENT GROUP INCORPORATED |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 06/15/1995 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY12194 |
| Federal ID | NY12194 |
| More Info | State Dam Safety Program |