Conowingo
Key Takeaway
Conowingo is classified as high hazard in Maryland. It was completed in 1928 and is 98 years old. Its primary use is hydroelectric. 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 | 94 ft (taller than 97.6% in MD) |
| Dam Length | 4,648 ft |
| Dam Type | Concrete |
| Max Storage | 310.0K acre-ft |
| Normal Storage | 301.4K acre-ft |
| Surface Area | 8,563 acres |
| Drainage Area | 27,077 sq mi |
| Max Discharge | 1,135,552 cfs |
| Year Completed | 1928 (98 years old) |
| NID ID | MD00097 |
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
Not Listed
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Low Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Conowingo?
Conowingo 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 Conowingo?
Conowingo is owned by information not available (Not Listed). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Conowingo built?
Conowingo was completed in 1928, making it 98 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 Conowingo?
Conowingo serves the following purposes: Hydroelectric, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Conowingo?
Conowingo has a dam height of 94 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 Conowingo last inspected?
Conowingo was last inspected on August 8, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.