Great Patchogue Lake Dam
Key Takeaway
Great Patchogue Lake Dam is classified as low hazard in New York. It was completed in 1917 and is 109 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 19.5% in NY) |
| Dam Length | 1,500 ft |
| Dam Type | Earth |
| Max Storage | 195 acre-ft |
| Normal Storage | 195 acre-ft |
| Surface Area | 49 acres |
| Drainage Area | 14 sq mi |
| Year Completed | 1917 (109 years old) |
| NID ID | NY14097 |
Safety Information
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?
Ownership
SUFFOLK COUNTY SOIL & WATER CONSERVATION DISTRICT
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Great Patchogue Lake Dam?
Great Patchogue 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 Great Patchogue Lake Dam?
Great Patchogue Lake Dam is owned by SUFFOLK COUNTY SOIL & WATER CONSERVATION DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Great Patchogue Lake Dam built?
Great Patchogue Lake Dam was completed in 1917, making it 109 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 Great Patchogue Lake Dam?
Great Patchogue 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 Great Patchogue Lake Dam?
Great Patchogue 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 Great Patchogue Lake Dam last inspected?
Great Patchogue Lake Dam was last inspected on July 24, 1997. Inspection dates indicate when a formal review occurred, not the results of that inspection.