New Jersey No Name # 11 Dam Reservoir Report

Last Updated: December 13, 2025

New Jersey No Name # 11 Dam, located in Branchville, Sussex County, New Jersey, is a privately-owned earth dam completed in 1957 for recreational purposes along the Branch of Dry Brook.


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Summary

The dam stands at a height of 12 feet with a length of 288 feet, providing a storage capacity of 125 acre-feet and a surface area of 15 acres. However, despite its primary purpose for recreation, the dam is classified as having a significant hazard potential and a poor condition assessment.

Managed by the New Jersey Department of Environmental Protection, the dam is subject to state regulation, inspection, and enforcement to ensure public safety. The last inspection in September 2021 revealed the dam's poor condition, highlighting the need for maintenance and potential risk mitigation measures to address the significant hazard potential. As a focal point for water resource and climate enthusiasts, the New Jersey No Name # 11 Dam serves as a reminder of the importance of proper dam management and maintenance to prevent potential hazards and ensure the safety of surrounding communities and the environment.

Year Completed

1957

Dam Length

288

Dam Height

12

River Or Stream

Branch of Dry Brook

Primary Dam Type

Earth

Surface Area

15

Drainage Area

0.42

Nid Storage

125

Hazard Potential

Significant

Nid Height

12
       
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.