Arrigoni Pond Dam Reservoir Report
Nearby: Tetrams Pond Dam Miller Pond Dam
Last Updated: December 5, 2025
Arrigoni Pond Dam, located in Durham, Connecticut, stands as a pivotal structure along the Hammonasset River, serving as a reservoir for recreation purposes.
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Summary
Built in 1945, this earth dam reaches a height of 21 feet and extends 100 feet in length, with a storage capacity of 83 acre-feet. The dam's surface area spans 9.2 acres and covers a drainage area of 2.03 square miles, aiding in managing water flow and storage within the region.
Maintained by a private entity, Arrigoni Pond Dam is regulated by the Connecticut Department of Energy and Environmental Protection (DEEP), ensuring compliance with state inspection, enforcement, and permitting requirements. The dam's condition, assessed as satisfactory during the last inspection in November 2019, presents a significant hazard potential, emphasizing the importance of regular monitoring and risk management measures. While the dam lacks associated locks or spillways, its role in safeguarding the local environment and community underscores the critical link between water resources, climate resilience, and recreational opportunities in the area.
With Rosa L. DeLauro serving as the congressional representative for the region, Arrigoni Pond Dam's strategic location and operational significance reflect a harmonious blend of natural beauty and human intervention. As water resource and climate enthusiasts continue to appreciate the dam's role in balancing recreational enjoyment with environmental stewardship, ongoing efforts to ensure its safety and functionality remain paramount. As a cornerstone of the Middlesex County landscape, Arrigoni Pond Dam symbolizes the delicate balance between harnessing natural resources for human benefit while safeguarding the ecosystem for future generations to enjoy.
Year Completed |
1945 |
Dam Length |
100 |
Dam Height |
21 |
River Or Stream |
HAMMONASSET RIVER |
Primary Dam Type |
Earth |
Surface Area |
9.2 |
Drainage Area |
2.03 |
Nid Storage |
83 |
Hazard Potential |
Significant |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Coginchaug River At Middlefield
|
60cfs |
Connecticut R At Middle Haddam
|
14900cfs |
Quinnipiac River At Wallingford
|
147cfs |
Indian River Near Clinton
|
6cfs |
Salmon River Near East Hampton
|
119cfs |
Mill R Nr Hamden
|
20cfs |
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.
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