Deferiet
Deferiet is a buttress dam located in Jefferson County, New York, built in 1899. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Deferiet
The primary purpose of Deferiet 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 Black River near Deferiet.
The dam stands 18 feet tall and stretches 695 feet across, creates a reservoir covering 70 acres, has a maximum storage capacity of 405 acre-feet, and collects water from a drainage area of 1,817 square miles. Completed in 1899, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/09/2019.
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Location
| State | New York |
| County | Jefferson |
| Nearest City | Deferiet |
| River/Stream | Black River |
| Coordinates | 44.02690, -75.67890 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 695 ft |
| Year Completed | 1899 (127 years old) |
Storage & Hydraulics
| NID Storage | 405 acre-ft |
| Max Storage | 405 acre-ft |
| Normal Storage | 405 acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 1,817 sq mi |
| Max Discharge | 45,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Erie Boulevard Hydropower, L.P. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/09/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00297 |
| Federal ID | NY00297 |
| More Info | State Dam Safety Program |