Stoneboro (Pa-474)
Key Takeaway
Stoneboro (Pa-474) is classified as high hazard in Pennsylvania. It was completed in 1966 and is 60 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 | 30 ft (taller than 65% in PA) |
| Dam Length | 1,640 ft |
| Dam Type | Earth |
| Max Storage | 814 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1966 (60 years old) |
| NID ID | PA00249 |
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
MERCER COUNTY COMMISSIONERS
Local Government
Nearby Dams
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High Hazard 45 ftHadley (Pa-489)
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High Hazard 51 ftCulbertson
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Low Hazard 12 ftCresswell Upper
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Significant Hazard 5 ftCresswell Lower
Mercer, PA
Significant Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Stoneboro (Pa-474)?
Stoneboro (Pa-474) 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 Stoneboro (Pa-474)?
Stoneboro (Pa-474) is owned by MERCER COUNTY COMMISSIONERS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Stoneboro (Pa-474) built?
Stoneboro (Pa-474) was completed in 1966, making it 60 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 Stoneboro (Pa-474)?
Stoneboro (Pa-474) 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 Stoneboro (Pa-474)?
Stoneboro (Pa-474) has a dam height of 30 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 Stoneboro (Pa-474) last inspected?
Stoneboro (Pa-474) was last inspected on September 10, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.