Lower Lake Dam
Key Takeaway
Lower Lake Dam is classified as low hazard in New York. It was completed in 1940 and is 86 years old. Its primary use is recreation.
Physical Details
| Dam Height | 12 ft (taller than 23.2% in NY) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 156 acre-ft |
| Normal Storage | 78 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 71 sq mi |
| Max Discharge | 140 cfs |
| Year Completed | 1940 (86 years old) |
| NID ID | NY01339 |
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 DEPARTMENT OF PUBLIC WORKS
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lower Lake Dam?
Lower 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 Lower Lake Dam?
Lower Lake Dam is owned by SUFFOLK COUNTY DEPARTMENT OF PUBLIC WORKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lower Lake Dam built?
Lower Lake Dam was completed in 1940, making it 86 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 Lower Lake Dam?
Lower 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 Lower Lake Dam?
Lower Lake Dam has a dam height of 12 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 Lower Lake Dam last inspected?
Lower Lake Dam was last inspected on October 14, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.