Pa-481
Key Takeaway
Pa-481 is classified as high hazard in Pennsylvania. It was completed in 1984 and is 42 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 Height | 51 ft (taller than 84.8% in PA) |
| Dam Length | 560 ft |
| Dam Type | Earth |
| Max Storage | 1.6K acre-ft |
| Normal Storage | 59 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 3 sq mi |
| Year Completed | 1984 (42 years old) |
| NID ID | PA01214 |
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
WASHINGTON COUNTY
Local Government
Nearby Dams
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High Hazard 27 ftPa-482
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High Hazard 78 ftFrequently Asked Questions
What is the hazard classification of Pa-481?
Pa-481 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 Pa-481?
Pa-481 is owned by WASHINGTON COUNTY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pa-481 built?
Pa-481 was completed in 1984, making it 42 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 Pa-481?
Pa-481 serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Pa-481?
Pa-481 has a dam height of 51 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 Pa-481 last inspected?
Pa-481 was last inspected on November 2, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.