Rock Lodge Pond Dam

Small Branch Pequannock River· Sussex, New Jersey· Built 1907· Earth· 15 ft tall
Significant Hazard Private

Key Takeaway

Rock Lodge Pond Dam is classified as significant hazard in New Jersey. It was completed in 1907 and is 119 years old. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 15 ft (taller than 51.4% in NJ)
Dam Length300 ft
Dam TypeEarth
Max Storage13 acre-ft
Normal Storage9 acre-ft
Surface Area3 acres
Drainage Area0 sq mi
Max Discharge59 cfs
Year Completed1907 (119 years old)
NID IDNJ00993

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: October 23, 2021
State Regulated: Yes
Regulatory Agency: NJDEP

Ownership

Rock Properties, Inc.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Rock Lodge Pond Dam?

Rock Lodge Pond Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Rock Lodge Pond Dam?

Rock Lodge Pond Dam is owned by Rock Properties, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Rock Lodge Pond Dam built?

Rock Lodge Pond Dam was completed in 1907, making it 119 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

How tall is Rock Lodge Pond Dam?

Rock Lodge Pond Dam has a dam height of 15 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Rock Lodge Pond Dam last inspected?

Rock Lodge Pond Dam was last inspected on October 23, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.