Massena Diversion Dam is a concrete dam located in St. Lawrence County, New York, built in 1912. It carries a Low hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 550 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 Massena Diversion Dam
Massena Diversion Dam is a dam in St. Lawrence, New York. The dam is owned by New York Power Authority (state). It impounds the St Lawrence River near Massena.
The dam stands 35 feet tall and stretches 550 feet across, creates a reservoir covering 96 acres, and has a maximum storage capacity of 1,125 acre-feet. Completed in 1912, 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. The most recent inspection on record was 08/15/2011. That was over 15 years ago.
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 | Massena |
| River/Stream | St Lawrence River |
| Coordinates | 44.93861, -74.87583 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 550 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 1,125 acre-ft |
| Max Storage | 1,125 acre-ft |
| Normal Storage | 1,125 acre-ft |
| Surface Area | 96 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | New York Power Authority |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/15/2011 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01240 |
| Federal ID | NY01240 |
| More Info | State Dam Safety Program |