Columbia Gateway Dam
Key Takeaway
Columbia Gateway Dam is classified as high hazard in Maryland. It was completed in 1972 and is 54 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 | 36 ft (taller than 81.5% in MD) |
| Dam Length | 1,600 ft |
| Dam Type | Earth |
| Max Storage | 313 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,820 cfs |
| Year Completed | 1972 (54 years old) |
| NID ID | MD00079 |
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
Howard Research & Development Corporation
Private
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Significant HazardFrequently Asked Questions
What is the hazard classification of Columbia Gateway Dam?
Columbia Gateway Dam 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 Columbia Gateway Dam?
Columbia Gateway Dam is owned by Howard Research & Development Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Columbia Gateway Dam built?
Columbia Gateway Dam was completed in 1972, making it 54 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 Columbia Gateway Dam?
Columbia Gateway Dam 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 Columbia Gateway Dam?
Columbia Gateway Dam has a dam height of 36 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 Columbia Gateway Dam last inspected?
Columbia Gateway Dam was last inspected on December 23, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.