Goffstown Lower Reservoir Dam Reservoir Report
Last Updated: December 17, 2025
The Goffstown Lower Reservoir Dam, located in Goffstown, New Hampshire, serves as a crucial water supply structure for the area.
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Summary
Completed in 1937, this earth dam stands at a height of 30 feet and spans a length of 260 feet, creating a reservoir with a capacity of 25 acre-feet. The dam is regulated by the NHDES Dam Bureau and undergoes regular inspections and enforcement to ensure its safety and functionality.
With a hazard potential rated as high and a fair condition assessment, the Goffstown Lower Reservoir Dam is considered to have a moderate risk level. The dam features an uncontrolled spillway and is designed primarily for water supply purposes. The surrounding area is at risk of inundation in the event of a dam failure, highlighting the importance of proper risk management measures and emergency preparedness. Despite its age, the dam continues to play a vital role in water resource management for the community.
As a part of the local government infrastructure, the Goffstown Lower Reservoir Dam is a key component in the water supply system for the region. With its historical significance dating back to the 1930s, this dam stands as a testament to engineering ingenuity and the importance of maintaining critical infrastructure for water resource management. Climate enthusiasts and water resource advocates can appreciate the role this dam plays in ensuring a reliable water supply for the residents of Goffstown and surrounding areas, while also recognizing the ongoing need for monitoring and maintenance to address potential risks associated with aging infrastructure.
Year Completed |
1937 |
Dam Length |
260 |
Dam Height |
30 |
River Or Stream |
WHITTLE BROOK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.85 |
Nid Storage |
25 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
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.
Goffstown Lower Reservoir Dam
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