Lake Antietam
Key Takeaway
Lake Antietam is classified as high hazard in Pennsylvania. It was completed in 1880 and is 146 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 | 60 ft (taller than 88.6% in PA) |
| Dam Length | 230 ft |
| Dam Type | Earth |
| Max Storage | 430 acre-ft |
| Normal Storage | 310 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 5 sq mi |
| Year Completed | 1880 (146 years old) |
| NID ID | PA00716 |
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
BERKS COUNTY COMMISSIONERS
Local Government
Nearby Dams
Egelman Reservoir
Berks, PA
High Hazard 15 ftBernhart
Berks, PA
High Hazard 30 ftMaiden Creek Reservoir
Berks, PA
Low Hazard 15 ftGreen Hills Lake
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High Hazard 18 ftShillington Memorial Park
Berks, PA
Significant Hazard 9 ftLake Ontelaunee
Berks, PA
High Hazard 52 ftRock Hollow Road
Berks, PA
Low Hazard 26 ftStinson Run
Berks, PA
Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Lake Antietam?
Lake Antietam 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 Lake Antietam?
Lake Antietam is owned by BERKS COUNTY COMMISSIONERS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Antietam built?
Lake Antietam was completed in 1880, making it 146 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 Lake Antietam?
Lake Antietam 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 Lake Antietam?
Lake Antietam has a dam height of 60 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 Lake Antietam last inspected?
Lake Antietam was last inspected on September 25, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.