Macopin Reservoir Dam
Key Takeaway
Macopin Reservoir Dam is classified as high hazard in New Jersey. It was completed in 1892 and is 134 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 34 ft (taller than 92.6% in NJ) |
| Dam Length | 434 ft |
| Dam Type | Stone |
| Max Storage | 206 acre-ft |
| Normal Storage | 101 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 64 sq mi |
| Max Discharge | 17,600 cfs |
| Year Completed | 1892 (134 years old) |
| NID ID | NJ00320 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
City of Newark, Department of Water and Sewer Utilities
Local Government
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High Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Macopin Reservoir Dam?
Macopin Reservoir Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Macopin Reservoir Dam?
Macopin Reservoir Dam is owned by City of Newark, Department of Water and Sewer Utilities (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Macopin Reservoir Dam built?
Macopin Reservoir Dam was completed in 1892, making it 134 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 Macopin Reservoir Dam?
Macopin 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 Macopin Reservoir Dam?
Macopin Reservoir Dam has a dam height of 34 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 Macopin Reservoir Dam last inspected?
Macopin Reservoir Dam was last inspected on April 14, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.