Bennetts Bridge Reservoir Report
Nearby: Cedar Lake Dam Autumn Lake Dam
Last Updated: December 7, 2025
Bennetts Bridge, also known as Salmon River Dam, is a historic hydroelectric structure located in Altmar, New York.
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Summary
Built in 1914, this concrete gravity dam stands at a height of 35 feet and spans a length of 607 feet. With a maximum storage capacity of 66,500 acre-feet and a normal storage of 66,500 acre-feet, it serves multiple purposes including flood risk reduction, hydroelectric power generation, and recreation.
Managed by the Federal Energy Regulatory Commission, Bennetts Bridge plays a crucial role in regulating the flow of the Salmon River with a maximum discharge capacity of 52,500 cfs. The dam features a controlled spillway with a width of 256 feet and is equipped with slide and tainter gates for water release. With a high hazard potential and very high risk assessment, the dam is subject to regular inspections to ensure its structural integrity and safety.
Water resource and climate enthusiasts will find Bennetts Bridge to be a fascinating structure that blends historical significance with modern functionality. As a key component in the region's water management system, the dam not only contributes to flood control and power generation but also offers opportunities for recreational activities. Its location in Oswego County, New York, amidst the scenic surroundings of the Salmon River, makes it a noteworthy site for those interested in the intersection of water resources, infrastructure, and environmental conservation.
Year Completed |
1914 |
Dam Length |
607 |
Dam Height |
35 |
River Or Stream |
Salmon River |
Surface Area |
3500 |
Drainage Area |
191 |
Nid Storage |
66500 |
Outlet Gates |
Slide (sluice gate) - 1, Tainter (radial) - 11 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Salmon River At Pineville Ny
|
980cfs |
Scriba Creek Near Constantia Ny
|
40cfs |
Sandy Creek Near Adams Ny
|
209cfs |
East Branch Fish Creek At Taberg Ny
|
499cfs |
Oneida River Near Euclid Ny
|
4900cfs |
Oswego River At Lock 7
|
6740cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Bennetts Bridge