Camp Siwanoy Dam

DEUEL HOLLOW BROOK· Dutchess, New York· Built 1926· Earth· 20 ft tall
Low Hazard Recreation Private

Key Takeaway

Camp Siwanoy Dam is classified as low hazard in New York. It was completed in 1926 and is 100 years old. Its primary use is recreation.

Physical Details

Dam Height 20 ft (taller than 56.3% in NY)
Dam Length260 ft
Dam TypeEarth
Max Storage52 acre-ft
Normal Storage37 acre-ft
Surface Area4 acres
Drainage Area5 sq mi
Year Completed1926 (100 years old)
NID IDNY01237

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: Yes
Last Inspection: July 23, 2009
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

BOY SCOUTS OF AMERICA

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Camp Siwanoy Dam?

Camp Siwanoy 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 Camp Siwanoy Dam?

Camp Siwanoy Dam is owned by BOY SCOUTS OF AMERICA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Camp Siwanoy Dam built?

Camp Siwanoy Dam was completed in 1926, making it 100 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 Camp Siwanoy Dam?

Camp Siwanoy 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 Camp Siwanoy Dam?

Camp Siwanoy Dam has a dam height of 20 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 Camp Siwanoy Dam last inspected?

Camp Siwanoy Dam was last inspected on July 23, 2009. 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.