Gumpas Pond Dam Reservoir Report
Last Updated: December 16, 2025
Gumpas Pond Dam, located in Pelham, New Hampshire, serves as a vital recreational site with a primary purpose of providing leisure activities for visitors.
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Summary
Built in 1900, this earth-type dam stands at a height of 10 feet and spans 170 feet in length, with a storage capacity of 558 acre-feet. The dam regulates Gumpas Pond Brook and offers a surface area of 93 acres for outdoor enthusiasts to enjoy.
Despite its significance for recreation, the dam poses a high hazard potential due to its poor condition assessment as of June 2018. With an inspection frequency of every 6 years, the dam is regulated, permitted, and inspected by the New Hampshire Department of Environmental Services Dam Bureau. The spillway type is uncontrolled, with a width of 6 feet, and the dam's drainage area is 1.72 square miles. Although the overall risk assessment is moderate, the dam's condition and hazard potential warrant attention to ensure public safety and environmental preservation.
Given its historical significance and impact on the local community, Gumpas Pond Dam stands as a key focal point for water resource and climate enthusiasts. With its unique design and recreational value, the dam serves as a reminder of the delicate balance between human infrastructure and natural ecosystems. As efforts continue to manage and maintain this important structure, it remains a symbol of the intersection between human activity and environmental stewardship in the face of climate change challenges.
Year Completed |
1900 |
Dam Length |
170 |
Dam Height |
10 |
River Or Stream |
GUMPAS POND BROOK |
Primary Dam Type |
Earth |
Surface Area |
93 |
Drainage Area |
1.72 |
Nid Storage |
558 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
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.
Gumpas Pond Dam
Musquash Pond boat launch