Dover Greens Dam Reservoir Report

Last Updated: December 5, 2025

Dover Greens Dam, located in Wingdale, New York, is a private concrete structure built in 1918 primarily for water supply purposes.


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Summary

With a height of 60 feet and a length of 240 feet, the dam holds a maximum storage capacity of 222 acre-feet, with a normal storage level of 174.8 acre-feet. It is situated on the TR-SWAMP RIVER and is regulated by the New York State Department of Environmental Conservation (NYS DEC), ensuring compliance with state permitting, inspection, and enforcement requirements.

The dam's spillway, with a width of 29 feet, is uncontrolled, and it has a high hazard potential with a fair condition assessment as of June 2017. Despite its moderate risk level, the dam has a history of regular inspections, with the last one conducted in August 2019. While there are no associated structures or locks, Dover Greens Dam poses a significant risk in cases of emergency, highlighting the importance of proper risk management and emergency action planning to safeguard the surrounding community and environment.

Owned privately and located in Dutchess County, Dover Greens Dam serves as a crucial water resource infrastructure in the area, supporting water supply needs for the region. As climate change continues to impact water resources and infrastructure resilience, ongoing monitoring, maintenance, and potential upgrades to the dam will be essential to ensure its continued safety and functionality in the face of evolving environmental challenges.

Year Completed

1918

Dam Length

240

Dam Height

60

River Or Stream

TR-SWAMP RIVER

Primary Dam Type

Concrete

Surface Area

10

Drainage Area

0.44

Nid Storage

222

Hazard Potential

High

Nid Height

60
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.