Lake Oniad Dam

TR-WAPPINGER CREEK· Dutchess, New York· Concrete· 8 ft tall
Low Hazard Recreation Private

Key Takeaway

Lake Oniad Dam is classified as low hazard in New York. Its primary use is recreation.

Physical Details

Dam Height 8 ft (taller than 5.1% in NY)
Dam Length20 ft
Dam TypeConcrete
Max Storage59 acre-ft
Normal Storage46 acre-ft
Surface Area13 acres
NID IDNY01177

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: March 29, 2013
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

LAKE ONIAD LOT OWNERS ASSOCIATION

Private

Nearby Dams

Wappingers Falls

Dutchess, NY

High Hazard 20 ft

Stephen Blodgett Pond Dam

Dutchess, NY

Significant Hazard 17 ft

Lake Walton Dam

Dutchess, NY

Significant Hazard 10 ft

Macghee Dam

Dutchess, NY

Significant Hazard 10 ft

Cobalt Lake Dam

Dutchess, NY

Low Hazard 36 ft

Fresh Air Fund Dam #2

Dutchess, NY

High Hazard 47 ft

Fresh Air Fund Dam #1

Dutchess, NY

High Hazard 45 ft

Hillside Lake Dam

Dutchess, NY

Significant Hazard 9 ft

Frequently Asked Questions

What is the hazard classification of Lake Oniad Dam?

Lake Oniad 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 Lake Oniad Dam?

Lake Oniad Dam is owned by LAKE ONIAD LOT OWNERS ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Lake Oniad Dam?

Lake Oniad 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 Lake Oniad Dam?

Lake Oniad 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 Lake Oniad Dam last inspected?

Lake Oniad Dam was last inspected on March 29, 2013. 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.