Powder Mill Pond Dam

Whippany River-TR· Morris, New Jersey· Earth· 35 ft tall
High Hazard Recreation State Government

Key Takeaway

Powder Mill Pond Dam is classified as high hazard in New Jersey. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 35 ft (taller than 93.2% in NJ)
Dam Length660 ft
Dam TypeEarth
Normal Storage96 acre-ft
Surface Area8 acres
Drainage Area2 sq mi
Max Discharge0 cfs
NID IDNJ00803

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

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

Emergency Action Plan: Yes
Last Inspection: March 26, 2020
State Regulated: Yes
Regulatory Agency: NJDEP

Ownership

New Jersey Transit

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Powder Mill Pond Dam?

Powder Mill Pond Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Powder Mill Pond Dam?

Powder Mill Pond Dam is owned by New Jersey Transit (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Powder Mill Pond Dam?

Powder Mill Pond 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 Powder Mill Pond Dam?

Powder Mill Pond Dam has a dam height of 35 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 Powder Mill Pond Dam last inspected?

Powder Mill Pond Dam was last inspected on March 26, 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.