Hidden Valley Lake Dam Reservoir Report
Last Updated: December 7, 2025
Hidden Valley Lake Dam, located in Vernon Township, Sussex County, New Jersey, is a privately owned earth dam standing at a height of 10 feet and stretching 75 feet in length.
°F
°F
mph
Wind
%
Humidity
Summary
The dam is situated on the Pachuck Creek-TR and is regulated by the New Jersey Department of Environmental Protection (NJDEP). With a surface area of 12 acres and a drainage area of 0.28 square miles, Hidden Valley Lake Dam plays a crucial role in managing water resources in the region.
Despite its important function, Hidden Valley Lake Dam poses a high hazard potential due to its poor condition, as assessed during the last inspection in November 2019. This raises concerns about the dam's ability to withstand potential emergencies and underscores the need for regular maintenance and improvements. With an inspection frequency of every two years, it is crucial for stakeholders to prioritize the dam's safety and implement necessary risk management measures to ensure the surrounding communities are protected from any potential risks associated with the dam.
As an essential infrastructure for water resource management, Hidden Valley Lake Dam requires ongoing attention and investment to enhance its safety and functionality. With its location in a high-risk area and the potential impact on the surrounding environment and communities, it is imperative for all relevant authorities and stakeholders to work together to address the dam's current condition and ensure it meets the required safety standards. By prioritizing the maintenance and risk assessment of Hidden Valley Lake Dam, we can mitigate potential hazards and safeguard the region's water resources for future generations.
Dam Length |
75 |
Dam Height |
10 |
River Or Stream |
Pachuck Creek-TR |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
0.28 |
Hazard Potential |
High |
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.
Hidden Valley Lake Dam
Greenwood Lk At Awosting Nj
Winding Waters Trail Town of Warwick
Mt. Laurel Park
Abram S Hewitt State Forest
Wallkill River National Wildlife Refuge
Wanaque State Conservation Area
Bubbling Springs