Troy Lock And Dam 1 Reservoir Report
Nearby: Wright Lake Dam Bradley Lake Dam
Last Updated: December 20, 2025
Troy Lock and Dam 1, located on the Hudson River in Troy, New York, was completed in 1915 and is owned and operated by the US Army Corps of Engineers.
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Summary
The dam's primary purpose is navigation, but it also serves hydroelectric purposes. With a height of 20 feet and a length of 1450 feet, the concrete gravity dam holds a storage capacity of 4200 acre-feet and has a maximum discharge rate of 215,000 cubic feet per second.
The dam's significant hazard potential is managed through regular inspections, emergency action plans, and risk management measures implemented by the US Army Corps of Engineers. The dam has an uncontrolled spillway type and one lock measuring 492 feet in length and 44 feet in width. In case of severe weather events or increased water levels, the dam may release water to manage water levels up or downstream and relieve pressure to maintain structural integrity. The Corps continually monitors the dam's condition, conducts maintenance and repairs as needed, and collaborates with local emergency managers to ensure preparedness for any potential dam-related emergencies.
In summary, Troy Lock and Dam 1 is a crucial infrastructure on the Hudson River, serving navigation and hydroelectric purposes. Despite its age, the dam is well-managed and maintained by the US Army Corps of Engineers to mitigate risks and ensure the safety of surrounding communities. The dam's strategic location and capacity play a key role in managing water levels and mitigating flood risks in the region, underscoring its importance in water resource and climate management efforts.
Year Completed |
1915 |
Dam Length |
1450 |
Dam Height |
20 |
River Or Stream |
HUDSON RIVER |
Primary Dam Type |
Concrete |
Surface Area |
280 |
Length Of Locks |
492 |
Hydraulic Height |
14 |
Drainage Area |
8090 |
Nid Storage |
4200 |
Structural Height |
20 |
Outlet Gates |
None - 0, Uncontrolled - 0 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Hudson River At Green Island Ny
|
6390cfs |
Mohawk River At Cohoes Ny
|
3550cfs |
Hudson River At Lock 1 Near Waterford Ny
|
4430cfs |
Hudson R Above Lock 1 Nr Waterford Ny
|
3930cfs |
Normans Kill At Albany Ny
|
78cfs |
Valatie Kill Near Nassau Ny
|
23cfs |
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.
Troy Lock And Dam 1
123rd Street 6, City of Troy