Franklin Falls Hydro Dam 2 Reservoir Report
Nearby: Stevens Mill Eastman Falls
Last Updated: December 17, 2025
Franklin Falls Hydro Dam 2 is a privately owned concrete dam located in Franklin, New Hampshire, along the Winnipesaukee River.
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Summary
Completed in 1888, this hydroelectric structure stands at a height of 20 feet and has a length of 150 feet. It serves the primary purpose of generating hydroelectric power, with a normal storage capacity of 10 acre-feet and a maximum discharge capability of 2000 cubic feet per second.
Managed by the New Hampshire Department of Environmental Services Dam Bureau, Franklin Falls Hydro Dam 2 is state-regulated and subject to regular inspections and enforcement measures to ensure its safety and compliance with regulations. The dam has a significant hazard potential and a moderate risk assessment rating. With its uncontrolled spillway and buttress core design, the dam plays a crucial role in water resource management in the area, contributing to the overall energy production and environmental conservation efforts.
Water resource and climate enthusiasts can appreciate the historical significance and functional importance of Franklin Falls Hydro Dam 2 in providing clean and renewable energy through hydroelectric power generation. Its location within the Merrimack County area of New Hampshire, along with its efficient design and operational capabilities, make it a key component of the region's infrastructure for sustainable water management and energy production. Despite its age, the dam continues to play a vital role in the local ecosystem and economy, highlighting the ongoing relevance of hydroelectric power in the context of climate change and environmental stewardship.
Year Completed |
1888 |
Dam Length |
150 |
Dam Height |
20 |
River Or Stream |
WINNIPESAUKEE RIVER |
Primary Dam Type |
Concrete |
Surface Area |
1.5 |
Drainage Area |
457 |
Nid Storage |
45 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Franklin Falls Hydro Dam 2
Lake Winnipesaukee At Weirs Beach
Webster Lake boat launch
Begins In Franklin To Sewall'S Island