Prompton Dam
Key Takeaway
Prompton Dam is classified as high hazard in Pennsylvania. It was completed in 1961 and is 65 years old. Its primary use is flood risk reduction. 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 Length | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 72.8K acre-ft |
| Normal Storage | 3.5K acre-ft |
| Surface Area | 290 acres |
| Drainage Area | 60 sq mi |
| Max Discharge | 3,200 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | PA00011 |
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
USACE - Philadelphia District
Federal Government
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High Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Prompton Dam?
Prompton 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 Prompton Dam?
Prompton Dam is owned by USACE - Philadelphia District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Prompton Dam built?
Prompton Dam was completed in 1961, making it 65 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 Prompton Dam?
Prompton Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Prompton Dam last inspected?
Prompton Dam was last inspected on September 20, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.