Fly Brook Dam

FLY BROOK· Ulster, New York· Built 1933· Earth· 25 ft tall
Low Hazard Recreation Private

Key Takeaway

Fly Brook Dam is classified as low hazard in New York. It was completed in 1933 and is 93 years old. Its primary use is recreation.

Physical Details

Dam Height 25 ft (taller than 69.7% in NY)
Dam Length300 ft
Dam TypeEarth
Max Storage260 acre-ft
Normal Storage210 acre-ft
Surface Area34 acres
Drainage Area3 sq mi
Max Discharge10 cfs
Year Completed1933 (93 years old)
NID IDNY00640

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

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

Emergency Action Plan: No
Last Inspection: May 20, 2010
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

GEORGE SMILEY & SON

Private

Nearby Dams

Tillson Lake Dam

Ulster, NY

High Hazard 39 ft

Lake Maratanza Dam

Ulster, NY

Significant Hazard 12 ft

North Woods Dam #2

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Low Hazard 18 ft

Lyon Lodge Dam

Ulster, NY

Significant Hazard 12 ft

Honk Falls Dam

Ulster, NY

High Hazard 42 ft

Moony Pond Dam

Ulster, NY

Low Hazard 25 ft

I Scott Watkins Dam

Ulster, NY

Low Hazard 10 ft

Pecks Dam

Ulster, NY

Significant Hazard 30 ft

Frequently Asked Questions

What is the hazard classification of Fly Brook Dam?

Fly Brook Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Fly Brook Dam?

Fly Brook Dam is owned by GEORGE SMILEY & SON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Fly Brook Dam built?

Fly Brook Dam was completed in 1933, making it 93 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 Fly Brook Dam?

Fly Brook 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 Fly Brook Dam?

Fly Brook Dam has a dam height of 25 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 Fly Brook Dam last inspected?

Fly Brook Dam was last inspected on May 20, 2010. 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.