Seneca Lake Dam

Lubbers Run· Sussex, New Jersey· Earth· 11 ft tall
Significant Hazard Recreation Private

Key Takeaway

Seneca Lake Dam is classified as significant hazard in New Jersey. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 11 ft (taller than 25.9% in NJ)
Dam Length200 ft
Dam TypeEarth
Normal Storage60 acre-ft
Surface Area23 acres
Drainage Area2 sq mi
Max Discharge0 cfs
NID IDNJ00768

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 2, 2020
State Regulated: Yes
Regulatory Agency: NJDEP

Ownership

Seneca Lake Beach Association

Private

Nearby Dams

Tomahawk Lake Dam

Sussex, NJ

Low Hazard 14 ft

Laidlaws Pond Dam

Sussex, NJ

Low Hazard 20 ft

Lake Mohawk Dam

Sussex, NJ

High Hazard 20 ft

Lake Saginaw Dam

Sussex, NJ

Low Hazard 16 ft

Bear Pond Dam D

Sussex, NJ

Low Hazard 33 ft

Bear Pond Dam B

Sussex, NJ

Significant Hazard 10 ft

Upper Mohawk Lake Dam

Sussex, NJ

High Hazard 16 ft

Bear Pond Dam A

Sussex, NJ

Significant Hazard 16 ft

Frequently Asked Questions

What is the hazard classification of Seneca Lake Dam?

Seneca Lake 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 Seneca Lake Dam?

Seneca Lake Dam is owned by Seneca Lake Beach Association (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Seneca Lake Dam?

Seneca Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Seneca Lake Dam?

Seneca Lake Dam has a dam height of 11 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 Seneca Lake Dam last inspected?

Seneca Lake Dam was last inspected on October 2, 2020. 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.