Ridgewood Reservoir Dam
Key Takeaway
Ridgewood Reservoir Dam is classified as low hazard in New York. It was completed in 1891 and is 135 years old. Its primary use is water supply.
Physical Details
| Dam Height | 30 ft (taller than 78.3% in NY) |
| Dam Length | 8,000 ft |
| Dam Type | Earth |
| Max Storage | 926 acre-ft |
| Normal Storage | 674 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1891 (135 years old) |
| NID ID | NY00160 |
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
NYC DEPT OF PARKS AND RECREATION
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Ridgewood Reservoir Dam?
Ridgewood Reservoir 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 Ridgewood Reservoir Dam?
Ridgewood Reservoir Dam is owned by NYC DEPT OF PARKS AND RECREATION (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Ridgewood Reservoir Dam built?
Ridgewood Reservoir Dam was completed in 1891, making it 135 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 Ridgewood Reservoir Dam?
Ridgewood Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Ridgewood Reservoir Dam?
Ridgewood Reservoir Dam has a dam height of 30 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 Ridgewood Reservoir Dam last inspected?
Ridgewood Reservoir Dam was last inspected on October 22, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.