York Indian Rock Dam
Key Takeaway
York Indian Rock Dam is classified as high hazard in Pennsylvania. It was completed in 1942 and is 84 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 | 83 ft (taller than 93.4% in PA) |
| Dam Length | 1,000 ft |
| Dam Type | Rockfill |
| Max Storage | 48.0K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 94 sq mi |
| Max Discharge | 62,000 cfs |
| Year Completed | 1942 (84 years old) |
| NID ID | PA00007 |
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 - Baltimore District
Federal Government
Nearby Dams
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Significant Hazard 16 ftMill
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High Hazard 18 ftBasin 2
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Low Hazard 11 ftFrequently Asked Questions
What is the hazard classification of York Indian Rock Dam?
York Indian Rock 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 York Indian Rock Dam?
York Indian Rock Dam is owned by USACE - Baltimore District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was York Indian Rock Dam built?
York Indian Rock Dam was completed in 1942, making it 84 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 York Indian Rock Dam?
York Indian Rock Dam 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 York Indian Rock Dam?
York Indian Rock Dam has a dam height of 83 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 York Indian Rock Dam last inspected?
York Indian Rock Dam was last inspected on March 6, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.