Everett Dam - Dike 1 Reservoir Report

Last Updated: December 15, 2025

Everett Dam - Dike 1, located in Goffstown, New Hampshire, is a federally owned rockfill dam primarily designed for flood risk reduction along the Piscataquqg River.


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Summary

Completed in 1961, this dam stands at a height of 50 feet and has a storage capacity of 131,000 acre-feet. With a spillway width of 175 feet and a maximum discharge of 28,500 cubic feet per second, it plays a crucial role in managing water levels to prevent flooding in the area.

Managed by the US Army Corps of Engineers, Everett Dam - Dike 1 is part of a comprehensive risk management strategy that involves regular inspections, maintenance, and emergency preparedness measures. Despite the dam's high hazard potential, USACE works diligently to mitigate risks associated with potential dam failures, ensuring the safety of downstream communities. By engaging with local emergency managers and the public, USACE aims to raise awareness and readiness for any dam-related emergencies that may arise.

Overall, Everett Dam - Dike 1 serves as a vital infrastructure for flood protection and water resource management in Hillsborough County. With ongoing risk assessment and proactive measures in place, this dam exemplifies the dedication of USACE in safeguarding communities against the impacts of extreme weather events and ensuring the integrity of critical water infrastructure.

Year Completed

1961

Dam Length

4050

Dam Height

50

River Or Stream

PISCATAQUQG RIVER

Primary Dam Type

Rockfill

Surface Area

1

Hydraulic Height

45

Drainage Area

64

Nid Storage

131000

Structural Height

50

Hazard Potential

High

Nid Height

50
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.