Mill Run
Key Takeaway
Mill Run is classified as high hazard in Pennsylvania. It was completed in 1957 and is 69 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 | 100 ft (taller than 95.8% in PA) |
| Dam Length | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 3.3K acre-ft |
| Normal Storage | 3.0K acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1957 (69 years old) |
| NID ID | PA00533 |
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
ALTOONA WATER AUTHORITY
Local Government
Nearby Dams
Allegheny Storage
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High Hazard 51 ftFrequently Asked Questions
What is the hazard classification of Mill Run?
Mill Run 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 Mill Run?
Mill Run is owned by ALTOONA WATER AUTHORITY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Run built?
Mill Run was completed in 1957, making it 69 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 Mill Run?
Mill Run 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 Mill Run?
Mill Run has a dam height of 100 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 Mill Run last inspected?
Mill Run was last inspected on September 23, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.