John Patrick Pond Dam

TR-MAHWAH RIVER· Rockland, New York· Built 1955· Earth· 13 ft tall
Significant Hazard Recreation Private

Key Takeaway

John Patrick Pond Dam is classified as significant hazard in New York. It was completed in 1955 and is 71 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 13 ft (taller than 29.9% in NY)
Dam Length500 ft
Dam TypeEarth
Max Storage30 acre-ft
Normal Storage27 acre-ft
Surface Area7 acres
Drainage Area1 sq mi
Max Discharge234 cfs
Year Completed1955 (71 years old)
NID IDNY13260

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: No
Last Inspection: November 6, 2018
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

SCENIC DEVELOPMENT LLC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of John Patrick Pond Dam?

John Patrick 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 John Patrick Pond Dam?

John Patrick Pond Dam is owned by SCENIC DEVELOPMENT LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was John Patrick Pond Dam built?

John Patrick Pond Dam was completed in 1955, making it 71 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of John Patrick Pond Dam?

John Patrick 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 John Patrick Pond Dam?

John Patrick Pond Dam has a dam height of 13 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 John Patrick Pond Dam last inspected?

John Patrick Pond Dam was last inspected on November 6, 2018. 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.