Chaumont Swamp Dam Reservoir Report
Nearby: Newton Falls Upper Newton Falls Lower
Last Updated: December 16, 2025
Chaumont Swamp Dam, located in Star Lake, New York, is a privately owned dam that serves primarily for irrigation purposes.
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Summary
Completed in 1954, this rockfill dam stands at a height of 100 feet and spans a length of 9000 feet, with a storage capacity of 4500 acre-feet. The dam is situated on the TR-OSWEGATCHIE RIVER and is regulated by the NYS DEC, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
With a low hazard potential and a moderate risk assessment rating of 3, Chaumont Swamp Dam presents a manageable level of risk. However, its condition assessment is currently listed as "Not Rated," indicating a need for further evaluation and maintenance. The dam features an uncontrolled spillway type and has not been modified in recent years. Although the last inspection was conducted in July 2010, the dam's emergency action plan status and risk management measures remain unspecified, suggesting potential areas for improvement in emergency preparedness and response.
Enthusiasts of water resources and climate science may find Chaumont Swamp Dam an intriguing subject for study, given its location in St. Lawrence County, New York, and its role in irrigation and water management. As a privately owned structure with state regulation, the dam offers insights into the intersection of private ownership and public oversight in ensuring the safety and sustainability of water infrastructure. Further research into the dam's condition assessment, emergency preparedness, and risk management measures could provide valuable lessons for enhancing the resilience of similar water resource systems in the face of changing climate conditions.
Year Completed |
1954 |
Dam Length |
9000 |
Dam Height |
100 |
River Or Stream |
TR-OSWEGATCHIE RIVER |
Primary Dam Type |
Rockfill |
Surface Area |
207 |
Drainage Area |
0.32 |
Nid Storage |
4500 |
Hazard Potential |
Low |
Nid Height |
100 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Cranberry Lake 41
|
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Cranberry Lake 42
|
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Cranberry Lake 43
|
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Oswegatchie 45
|
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Oswegatchie 44
|
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Oswegatchie 43
|
Chaumont Swamp Dam