Lake Hildegarde Dam Reservoir Report
Nearby: Merriewold Lake Dam Stuts Dam
Last Updated: December 24, 2025
Lake Hildegarde Dam, located in Washingtonville, New York, was completed in 1929 and serves multiple purposes, including fire protection, stock, and as a small fish pond.
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Summary
The dam is privately owned and is regulated by the New York State Department of Environmental Conservation. It has a dam height of 10 feet and a length of 260 feet, with a storage capacity of 87 acre-feet and a surface area of 13 acres.
The dam's spillway is uncontrolled with a width of 75 feet, and it is situated on the TR-Moodna Creek. The dam has a significant hazard potential and is inspected every four years, with the last inspection conducted in May 2019. While the condition assessment is currently not rated, the risk assessment indicates a moderate risk level.
Lake Hildegarde Dam provides a vital water resource for the local community and is also used for recreational purposes. Its location in Orange County, New York, makes it a key component in water management and climate resilience efforts in the region. As a focal point for water enthusiasts and climate activists, the dam highlights the importance of sustainable water resource management and the need for ongoing monitoring and maintenance to ensure its safety and longevity.
Year Completed |
1929 |
Dam Length |
260 |
Dam Height |
10 |
River Or Stream |
TR-MOODNA CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Drainage Area |
1.36 |
Nid Storage |
87 |
Hazard Potential |
Significant |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Ramapo River At Ramapo Ny
|
148cfs |
Wanaque River At Awosting Nj
|
9cfs |
Mahwah River Near Suffern Ny
|
20cfs |
Ringwood Creek Near Wanaque Nj
|
6cfs |
Ramapo River At Suffern Ny
|
202cfs |
Ramapo River Near Mahwah Nj
|
143cfs |
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.
Lake Hildegarde Dam