Speedwell Dam
Key Takeaway
Speedwell Dam is classified as high hazard in New Jersey. It was completed in 1939 and is 87 years old. Its primary use is recreation. 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 | 14 ft (taller than 46.2% in NJ) |
| Dam Length | 145 ft |
| Dam Type | Masonry |
| Max Storage | 349 acre-ft |
| Normal Storage | 77 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 25 sq mi |
| Max Discharge | 4,255 cfs |
| Year Completed | 1939 (87 years old) |
| NID ID | NJ00359 |
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
Town of Morristown
Local Government
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High Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Speedwell Dam?
Speedwell 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 Speedwell Dam?
Speedwell Dam is owned by Town of Morristown (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Speedwell Dam built?
Speedwell Dam was completed in 1939, making it 87 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 Speedwell Dam?
Speedwell 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 Speedwell Dam?
Speedwell Dam has a dam height of 14 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 Speedwell Dam last inspected?
Speedwell Dam was last inspected on October 15, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.