Allison Street Levee (Mt. Ranier)
Key Takeaway
Allison Street Levee (Mt. Ranier) is classified as high hazard in Maryland. It was completed in 1988 and is 38 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 | 15 ft (taller than 21.8% in MD) |
| Dam Length | 7,065 ft |
| Dam Type | Earth |
| Year Completed | 1988 (38 years old) |
| NID ID | MD00583 |
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
Prince Georges County
Local Government
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What is the hazard classification of Allison Street Levee (Mt. Ranier)?
Allison Street Levee (Mt. Ranier) 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 Allison Street Levee (Mt. Ranier)?
Allison Street Levee (Mt. Ranier) is owned by Prince Georges County (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Allison Street Levee (Mt. Ranier) built?
Allison Street Levee (Mt. Ranier) was completed in 1988, making it 38 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 Allison Street Levee (Mt. Ranier)?
Allison Street Levee (Mt. Ranier) 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 Allison Street Levee (Mt. Ranier)?
Allison Street Levee (Mt. Ranier) has a dam height of 15 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 Allison Street Levee (Mt. Ranier) last inspected?
Allison Street Levee (Mt. Ranier) was last inspected on April 6, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.