Etra Mill Dam
Key Takeaway
Etra Mill Dam is classified as low hazard in New Jersey. It was completed in 1930 and is 96 years old. Its primary use is recreation.
Physical Details
| Dam Height | 11 ft (taller than 25.9% in NJ) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Normal Storage | 66 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 380 cfs |
| Year Completed | 1930 (96 years old) |
| NID ID | NJ00298 |
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
Township of East Windsor
Local Government
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Significant Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Etra Mill Dam?
Etra Mill 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 Etra Mill Dam?
Etra Mill Dam is owned by Township of East Windsor (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Etra Mill Dam built?
Etra Mill Dam was completed in 1930, making it 96 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 Etra Mill Dam?
Etra Mill 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 Etra Mill Dam?
Etra Mill 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 Etra Mill Dam last inspected?
Etra Mill Dam was last inspected on September 30, 2004. Inspection dates indicate when a formal review occurred, not the results of that inspection.