Warner Gap Hollow Dam
Key Takeaway
Warner Gap Hollow Dam is classified as high hazard in Maryland. It was completed in 1902 and is 124 years old. Its primary use is water supply. 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 | 65 ft (taller than 95% in MD) |
| Dam Length | 700 ft |
| Dam Type | Earth |
| Max Storage | 296 acre-ft |
| Normal Storage | 246 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 6,800 cfs |
| Year Completed | 1902 (124 years old) |
| NID ID | MD00006 |
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
City of Hagerstown
Local Government
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High Hazard 64 ftFrequently Asked Questions
What is the hazard classification of Warner Gap Hollow Dam?
Warner Gap Hollow 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 Warner Gap Hollow Dam?
Warner Gap Hollow Dam is owned by City of Hagerstown (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Warner Gap Hollow Dam built?
Warner Gap Hollow Dam was completed in 1902, making it 124 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 Warner Gap Hollow Dam?
Warner Gap Hollow Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Warner Gap Hollow Dam?
Warner Gap Hollow Dam has a dam height of 65 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 Warner Gap Hollow Dam last inspected?
Warner Gap Hollow Dam was last inspected on October 1, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.