Vernon Reservoir Report
Last Updated: December 13, 2025
Vernon, a private hydroelectric dam located in Cheshire, New Hampshire, stands as a testament to sustainable energy generation and recreational opportunities along the Connecticut River.
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Summary
Completed in 1909, this concrete gravity dam boasts a height of 58 feet and a length of 956 feet, with a storage capacity of 54,000 acre-feet and a normal storage level of 18,300 acre-feet. Managed by the NHDES Dam Bureau and regulated by the Federal Energy Regulatory Commission, Vernon serves as a crucial infrastructure for water resource management in the region.
With a controlled spillway width of 600 feet and a maximum discharge of 224,700 cubic feet per second, Vernon is equipped to handle potential risks and emergencies with a low hazard potential. Despite its age, the dam's very high risk assessment rating indicates proactive risk management measures are in place to ensure its continued safe operation. Additionally, Vernon offers recreational opportunities and environmental benefits, making it a multifaceted asset in the region. As a key player in the New England District, Vernon symbolizes the intersection of water resource management, climate resilience, and sustainable energy practices.
As a pivotal structure in New Hampshire's water infrastructure, Vernon represents the harmonious balance between hydroelectric power generation and environmental stewardship. Its strategic location on the Connecticut River not only supports renewable energy production but also provides a platform for recreation and conservation efforts. With a rich history dating back over a century, Vernon's enduring presence underscores the importance of responsible water resource management and climate-conscious practices in safeguarding our natural resources for future generations.
Year Completed |
1909 |
Dam Length |
956 |
Dam Height |
58 |
River Or Stream |
Connecticut River |
Primary Dam Type |
Concrete |
Surface Area |
2550 |
Drainage Area |
6266 |
Nid Storage |
54000 |
Outlet Gates |
Slide (sluice gate) - 8, Tainter (radial) - 6 |
Hazard Potential |
Low |
Nid Height |
58 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Ashuelot River At Hinsdale
|
225cfs |
Green River Near Colrain
|
63cfs |
Ashuelot River At West Swanzey
|
101cfs |
Millers River At Erving
|
169cfs |
Connecticut River At Montague City
|
3430cfs |
North River At Shattuckville
|
72cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Fort Dummer State Park
|
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Richardson-Zlogar Cabin
|
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Barton Cove
|
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Swanzey Lake Camping Area
|
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Pilgrim Pines Camping Area
|
Vernon