Port Leyden
Port Leyden is a concrete dam located in Lewis County, New York, built in 1983. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Port Leyden
The primary purpose of Port Leyden is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. It impounds the Black River near Lyons Falls.
The dam stands 32 feet tall and stretches 310 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 150 acre-feet, and collects water from a drainage area of 429 square miles. Completed in 1983, the structure is 43 years 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 09/19/2019.
At 32 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | New York |
| County | Lewis |
| Nearest City | Lyons Falls |
| River/Stream | Black River |
| Coordinates | 43.59140, -75.34440 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 310 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 429 sq mi |
| Max Discharge | 18,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/19/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01428 |
| Federal ID | NY01428 |
| More Info | State Dam Safety Program |