Seavey Pond Outlet Dam Reservoir Report
Last Updated: December 16, 2025
Seavey Pond Outlet Dam in Windham, New Hampshire, is a privately owned structure regulated by the NHDES Dam Bureau.
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Summary
Situated on the Seavey Pond, this earth dam serves primarily for recreational purposes, offering a storage capacity of 68 acre-feet and a normal storage of 17.4 acre-feet. Despite its low hazard potential, the dam is rated as being in poor condition, with the last inspection in 2018 revealing the need for maintenance and improvements. The dam's spillway is uncontrolled, with a width of 11 feet, and a maximum discharge capacity of 150 cubic feet per second.
The Seavey Pond Outlet Dam, with a height of 8 feet and a length of 100 feet, presents moderate risk (level 3) due to its poor condition and the lack of recent assessments for emergency preparedness. The dam's location in Rockingham County, New Hampshire, and its ownership status as private raise concerns about the need for proper maintenance and oversight to ensure the safety of the surrounding area. With a drainage area of 5.3 square miles and a surface area of 10.6 acres, the dam plays a crucial role in managing water resources and maintaining the ecological balance of the Seavey Pond ecosystem.
As a focal point for recreational activities, the Seavey Pond Outlet Dam offers opportunities for boating, fishing, and wildlife observation. However, its structural integrity and maintenance are essential to prevent potential risks and ensure the continued enjoyment of these outdoor activities in a safe environment. With the dam's condition assessment indicating a need for improvement, stakeholders and regulatory agencies must collaborate to implement necessary measures for the dam's rehabilitation and long-term sustainability, thereby safeguarding the water resources and climate resilience of the Seavey Pond area.
Dam Length |
100 |
Dam Height |
8 |
River Or Stream |
SEAVEY POND |
Primary Dam Type |
Earth |
Surface Area |
10.6 |
Drainage Area |
5.3 |
Nid Storage |
68 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
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.
Seavey Pond Outlet Dam
Canoe Launch Windham