John C Youngman
Key Takeaway
John C Youngman is classified as high hazard in Pennsylvania. It was completed in 1951 and is 75 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 | 101 ft (taller than 96.3% in PA) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 2.6K acre-ft |
| Normal Storage | 1.6K acre-ft |
| Surface Area | 61 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1951 (75 years old) |
| NID ID | PA00353 |
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
WILLIAMSPORT MUNICIPAL WATER AUTHORITY
Local Government
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Significant Hazard 17 ftFrequently Asked Questions
What is the hazard classification of John C Youngman?
John C Youngman 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 John C Youngman?
John C Youngman is owned by WILLIAMSPORT MUNICIPAL WATER AUTHORITY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John C Youngman built?
John C Youngman was completed in 1951, making it 75 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 John C Youngman?
John C Youngman 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 John C Youngman?
John C Youngman has a dam height of 101 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 John C Youngman last inspected?
John C Youngman was last inspected on October 14, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.