Annapolis Reservoir
Key Takeaway
Annapolis Reservoir is classified as significant hazard in Maryland. It was completed in 1920 and is 106 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 15 ft (taller than 21.8% in MD) |
| Dam Length | 345 ft |
| Dam Type | Buttress |
| Max Storage | 82 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 430 cfs |
| Year Completed | 1920 (106 years old) |
| Year Modified | 1956 |
| NID ID | MD00135 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
City of Annapolis
Local Government
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Significant Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Annapolis Reservoir?
Annapolis Reservoir is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Annapolis Reservoir?
Annapolis Reservoir is owned by City of Annapolis (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Annapolis Reservoir built?
Annapolis Reservoir was completed in 1920, making it 106 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 Annapolis Reservoir?
Annapolis Reservoir serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Annapolis Reservoir?
Annapolis Reservoir 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 Annapolis Reservoir last inspected?
Annapolis Reservoir was last inspected on May 18, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.