Tomkins Cove Dam

TR-HUDSON RIVER· Rockland, New York· Built 1915· Masonry· 8 ft tall
Significant Hazard Irrigation Private

Key Takeaway

Tomkins Cove Dam is classified as significant hazard in New York. It was completed in 1915 and is 111 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 8 ft (taller than 5.1% in NY)
Dam Length325 ft
Dam TypeMasonry
Max Storage16 acre-ft
Normal Storage14 acre-ft
Surface Area6 acres
Drainage Area5 sq mi
Year Completed1915 (111 years old)
NID IDNY13523

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: June 25, 2019
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

WILLIAM DWYER & MAUREEN NAUGHTON

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Tomkins Cove Dam?

Tomkins Cove 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 Tomkins Cove Dam?

Tomkins Cove Dam is owned by WILLIAM DWYER & MAUREEN NAUGHTON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Tomkins Cove Dam built?

Tomkins Cove Dam was completed in 1915, making it 111 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 Tomkins Cove Dam?

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

How tall is Tomkins Cove Dam?

Tomkins Cove Dam has a dam height of 8 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 Tomkins Cove Dam last inspected?

Tomkins Cove Dam was last inspected on June 25, 2019. 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.