Fresh Pond Dam Reservoir Report
Last Updated: January 1, 2026
Fresh Pond Dam, located in Suffolk County, New York, is a privately owned structure with a primary purpose of recreation.
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Summary
Completed in 1945, the dam stands at a height of 7 feet and has a storage capacity of 53 acre-feet. The dam, situated on the TR-LONG ISLAND SOUND river or stream, features a controlled spillway with a width of 4 feet, and has a low hazard potential.
This dam, with a surface area of 13 acres, provides important recreational opportunities in the area. While the condition assessment is currently not rated, the risk assessment for Fresh Pond Dam categorizes it as having a very high risk, with a DSAC assigned date not available. The dam is state regulated and inspected by the NYS DEC, with enforcement and permitting also overseen by state agencies.
Fresh Pond Dam is a significant landmark for water resource and climate enthusiasts, offering a glimpse into the history and management of dams in New York. With its unique design and purpose, this dam serves as a vital recreational asset while also posing potential risks that require ongoing monitoring and management to ensure the safety of surrounding communities and the environment.
Year Completed |
1945 |
Dam Length |
20 |
Dam Height |
7 |
River Or Stream |
TR-LONG ISLAND SOUND |
Primary Dam Type |
Other |
Surface Area |
13 |
Nid Storage |
53 |
Hazard Potential |
Low |
Nid Height |
7 |
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.
Fresh Pond Dam
Asharoken Avenue Asharoken