Lock E12 Tribes Hill Reservoir Report
Last Updated: December 21, 2025
Lock E12 Tribes Hill, located in Montgomery County, New York, is a state-regulated hydroelectric dam on the Mohawk River (Erie Canal).
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Summary
Built in 1910, this dam stands at a height of 11 feet and spans a length of 460 feet, with a storage capacity of 7,199 acre-feet. The dam serves the primary purposes of hydroelectric power generation and navigation, contributing to the region's water resource management and infrastructure development.
Managed by the New York State Department of Environmental Conservation (NYS DEC) and inspected by the Federal Energy Regulatory Commission (FERC), Lock E12 has a low hazard potential and a very high risk rating. Despite its age, the dam's condition assessment is currently listed as not available, highlighting the need for ongoing monitoring and maintenance. With controlled spillways and a designated emergency action plan, Lock E12 is prepared to mitigate potential risks and ensure the safety of surrounding communities in the event of a water-related emergency.
As a vital component of the region's water infrastructure, Lock E12 Tribes Hill serves as a key player in balancing water resource management, energy production, and navigational needs along the Mohawk River. With its historical significance and ongoing regulatory oversight, this hydroelectric dam continues to play a crucial role in supporting sustainable water resource practices and climate resilience efforts in New York State.
Year Completed |
1910 |
Dam Length |
460 |
Dam Height |
11 |
River Or Stream |
Mohawk River (Erie Canal) |
Primary Dam Type |
Other |
Surface Area |
737 |
Drainage Area |
3090 |
Nid Storage |
7199 |
Hazard Potential |
Low |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Lock E12 Tribes Hill