Crystal Lake Dam

TR-HANKINS CREEK· Sullivan, New York· Built 1920· Concrete· 8 ft tall
Low Hazard Flood Risk Reduction Recreation State Government

Key Takeaway

Crystal Lake Dam is classified as low hazard in New York. It was completed in 1920 and is 106 years old. Its primary use is flood risk reduction.

Physical Details

Dam Height 8 ft (taller than 5.1% in NY)
Dam Length50 ft
Dam TypeConcrete
Max Storage778 acre-ft
Normal Storage778 acre-ft
Surface Area38 acres
Drainage Area0 sq mi
Max Discharge25 cfs
Year Completed1920 (106 years old)
NID IDNY01282

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: September 5, 2008
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

NYS DEC

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Crystal Lake Dam?

Crystal Lake 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 Crystal Lake Dam?

Crystal Lake Dam is owned by NYS DEC (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Crystal Lake Dam built?

Crystal Lake Dam was completed in 1920, making it 106 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 Crystal Lake Dam?

Crystal Lake Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Crystal Lake Dam?

Crystal Lake 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 Crystal Lake Dam last inspected?

Crystal Lake Dam was last inspected on September 5, 2008. 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.