Massapequa Lake Dam
Key Takeaway
Massapequa Lake Dam is classified as low hazard in New York. It was completed in 1890 and is 136 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 19.5% in NY) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 141 acre-ft |
| Normal Storage | 135 acre-ft |
| Surface Area | 38 acres |
| Year Completed | 1890 (136 years old) |
| NID ID | NY01512 |
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
NASSAU COUNTY DEPARTMENT OF PUBLIC WORKS
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Massapequa Lake Dam?
Massapequa 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 Massapequa Lake Dam?
Massapequa Lake Dam is owned by NASSAU COUNTY DEPARTMENT OF PUBLIC WORKS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Massapequa Lake Dam built?
Massapequa Lake Dam was completed in 1890, making it 136 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 Massapequa Lake Dam?
Massapequa 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 Massapequa Lake Dam?
Massapequa 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 Massapequa Lake Dam last inspected?
Massapequa Lake Dam was last inspected on July 23, 1997. Inspection dates indicate when a formal review occurred, not the results of that inspection.