Silver Lake Dam

W BRANCH MAMARONECK RIVER· Westchester, New York· Built 1815· Earth· 9 ft tall
Significant Hazard Recreation Local Government

Key Takeaway

Silver Lake Dam is classified as significant hazard in New York. It was completed in 1815 and is 211 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 9 ft (taller than 9% in NY)
Dam Length225 ft
Dam TypeEarth
Max Storage160 acre-ft
Normal Storage130 acre-ft
Surface Area38 acres
Drainage Area1 sq mi
Max Discharge50 cfs
Year Completed1815 (211 years old)
NID IDNY00896

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: Yes
Last Inspection: June 24, 2019
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

WESTCHESTER COUNTY DEPT OF PARKS & RECREATION

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Silver Lake Dam?

Silver 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 Silver Lake Dam?

Silver Lake Dam is owned by WESTCHESTER COUNTY DEPT OF PARKS & RECREATION (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Silver Lake Dam built?

Silver Lake Dam was completed in 1815, making it 211 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 Silver Lake Dam?

Silver 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 Silver Lake Dam?

Silver Lake Dam has a dam height of 9 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 Silver Lake Dam last inspected?

Silver Lake Dam was last inspected on June 24, 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.