Allegheny River Lock and Dam 5
Key Takeaway
Allegheny River Lock and Dam 5 is classified as low hazard in Pennsylvania. It was completed in 1927 and is 99 years old. Its primary use is irrigation.
Physical Details
| Dam Length | 856 ft |
| Dam Type | Gravity |
| Max Storage | 9.8K acre-ft |
| Normal Storage | 9.8K acre-ft |
| Surface Area | 660 acres |
| Drainage Area | 9,351 sq mi |
| Max Discharge | 82,000 cfs |
| Year Completed | 1927 (99 years old) |
| NID ID | PA00115 |
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
Nearby Dams
Allegheny River Lock and Dam 4
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Significant HazardAllegheny River Lock and Dam 6
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Low HazardNorthmoreland Lake (Pa-117)
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High Hazard 38 ftWeaver Lake
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High Hazard 25 ftLake Saxony
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High Hazard 26 ftFawn Mine #91 Refuse Impoundment
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High Hazard 120 ftCrooked Creek Dam
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High HazardUpper West Deer Lake
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High Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Allegheny River Lock and Dam 5?
Allegheny River Lock and Dam 5 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 5?
Allegheny River Lock and Dam 5 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 5 built?
Allegheny River Lock and Dam 5 was completed in 1927, making it 99 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 5?
Allegheny River Lock and Dam 5 serves the following purposes: Irrigation. 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 5 last inspected?
Allegheny River Lock and Dam 5 was last inspected on September 12, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.