Lake Anne Dam Reservoir Report
Last Updated: December 13, 2025
Located in Stillwater, New Jersey, Lake Anne Dam is a private Earth dam completed in 1950 primarily for recreational purposes along the Paulinskill River.
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Summary
Standing at 10 feet in height and spanning 260 feet in length, the dam has a storage capacity of 122 acre-feet and covers a surface area of 20 acres. With a maximum discharge rate of 110 cubic feet per second, the dam poses a low hazard potential and has been assessed to be in satisfactory condition as of the last inspection in October 2020.
Managed by the New Jersey Department of Environmental Protection (NJDEP) and regulated at the state level, Lake Anne Dam undergoes regular inspections every four years to ensure its structural integrity and safety. The dam's emergency action plan (EAP) was last revised in September 2008, and it meets established guidelines for risk management and emergency response. While the dam does not fall under the jurisdiction of the U.S. Army Corps of Engineers, its maintenance and operations are overseen by the private owners to ensure compliance with state regulations and enforcement.
With its picturesque location in Hampton Township, Lake Anne Dam provides a tranquil setting for outdoor activities and water recreation, offering a peaceful retreat for visitors to enjoy the natural beauty of Sussex County. The dam's role in providing recreational opportunities is underscored by its low hazard potential, which reflects the commitment to maintaining a safe environment for all who visit the surrounding area.
Year Completed |
1950 |
Dam Length |
260 |
Dam Height |
10 |
River Or Stream |
Paulinskill River-TR |
Primary Dam Type |
Earth |
Surface Area |
20 |
Drainage Area |
0.91 |
Nid Storage |
122 |
Hazard Potential |
Low |
Nid Height |
10 |
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.
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