Merriewold Lake Dam

TR-BLACK BROOK· Sullivan, New York· Built 1914· Earth· 10 ft tall
Significant Hazard Recreation Private

Key Takeaway

Merriewold Lake Dam is classified as significant hazard in New York. It was completed in 1914 and is 112 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 10 ft (taller than 12.4% in NY)
Dam Length245 ft
Dam TypeEarth
Max Storage100 acre-ft
Normal Storage100 acre-ft
Surface Area38 acres
Year Completed1914 (112 years old)
NID IDNY00986

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: September 26, 2019
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

MERRIEWOLD LAKE CLUB

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Merriewold Lake Dam?

Merriewold Lake 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 Merriewold Lake Dam?

Merriewold Lake Dam is owned by MERRIEWOLD LAKE CLUB (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Merriewold Lake Dam built?

Merriewold Lake Dam was completed in 1914, making it 112 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 Merriewold Lake Dam?

Merriewold Lake 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 Merriewold Lake Dam?

Merriewold Lake Dam has a dam height of 10 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 Merriewold Lake Dam last inspected?

Merriewold Lake Dam was last inspected on September 26, 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.