Stony Lake Dam Reservoir Report
Nearby: Robert Rooke Dam Kittatinny Lake Dam
Last Updated: December 13, 2025
Stony Lake Dam, located in Sandyston Township, Sussex County, New Jersey, is a state-regulated structure primarily used for recreation purposes.
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Summary
Built in 1926, this masonry dam stands at a height of 16.5 feet and has a storage capacity of 131 acre-feet, providing a surface area of 18 acres for water-related activities. The dam, situated on Stony Brook, serves as a focal point for outdoor enthusiasts seeking to enjoy the scenic beauty of the surrounding area.
Despite its age, Stony Lake Dam is deemed to have a low hazard potential and is currently in fair condition, as assessed in 2005. The dam undergoes inspections every four years, with the last assessment conducted in July 2005. While no spillway type is specified, the structure is equipped to manage any potential risks effectively. Additionally, the dam is under the jurisdiction of the New Jersey Department of Environmental Protection (NJDEP), ensuring that it is subject to state permitting, inspection, and enforcement protocols to maintain its safety and functionality.
Congressional District 05, represented by Josh S. Gottheimer, plays a role in overseeing the regulatory aspects of Stony Lake Dam. As a vital water resource within the region, the dam contributes to the local ecosystem and provides recreational opportunities for residents and visitors alike. With its historical significance and continued relevance in the present day, Stony Lake Dam stands as a testament to the importance of responsible water resource management in the face of changing climate conditions.
Year Completed |
1926 |
Dam Length |
142 |
Dam Height |
16.5 |
River Or Stream |
Stony Brook |
Primary Dam Type |
Masonry |
Surface Area |
18 |
Drainage Area |
1.4 |
Nid Storage |
131 |
Hazard Potential |
Low |
Nid Height |
17 |
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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