Sidwell Lake Dam

HALFWAY BROOK· Sullivan, New York· Stone· 11 ft tall
Significant Hazard Recreation Private

Key Takeaway

Sidwell Lake Dam is classified as significant hazard in New York. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 11 ft (taller than 19.5% in NY)
Dam Length220 ft
Dam TypeStone
Max Storage870 acre-ft
Normal Storage300 acre-ft
Surface Area82 acres
Max Discharge850 cfs
NID IDNY01215

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

Adirondack Fisheries, Inc.

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Sidwell Lake Dam?

Sidwell 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 Sidwell Lake Dam?

Sidwell Lake Dam is owned by Adirondack Fisheries, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Sidwell Lake Dam?

Sidwell 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 Sidwell Lake Dam?

Sidwell Lake Dam has a dam height of 11 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 Sidwell Lake Dam last inspected?

Sidwell 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.