Allegheny River Lock and Dam 7
Key Takeaway
Allegheny River Lock and Dam 7 is classified as low hazard in Pennsylvania. It was completed in 1931 and is 95 years old. Its primary use is navigation.
Physical Details
| Dam Length | 996 ft |
| Dam Type | Gravity |
| Max Storage | 8.4K acre-ft |
| Normal Storage | 8.4K acre-ft |
| Surface Area | 640 acres |
| Drainage Area | 8,982 sq mi |
| Max Discharge | 110,000 cfs |
| Year Completed | 1931 (95 years old) |
| NID ID | PA00117 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
USACE - Pittsburgh District
Federal Government
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Low HazardFrequently Asked Questions
What is the hazard classification of Allegheny River Lock and Dam 7?
Allegheny River Lock and Dam 7 is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Allegheny River Lock and Dam 7?
Allegheny River Lock and Dam 7 is owned by USACE - Pittsburgh District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Allegheny River Lock and Dam 7 built?
Allegheny River Lock and Dam 7 was completed in 1931, making it 95 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 Allegheny River Lock and Dam 7?
Allegheny River Lock and Dam 7 serves the following purposes: Navigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Allegheny River Lock and Dam 7 last inspected?
Allegheny River Lock and Dam 7 was last inspected on July 21, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.