Lake Jo-Ann
Key Takeaway
Lake Jo-Ann is classified as high hazard in Pennsylvania. It was completed in 1950 and is 76 years old. Its primary use is recreation. 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 | 16 ft (taller than 32.5% in PA) |
| Dam Length | 515 ft |
| Dam Type | Earth |
| Max Storage | 187 acre-ft |
| Normal Storage | 125 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1950 (76 years old) |
| NID ID | PA00504 |
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
LAKE COLONY HOMEOWNERS ASSOCIATION
Private
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What is the hazard classification of Lake Jo-Ann?
Lake Jo-Ann 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 Jo-Ann?
Lake Jo-Ann is owned by LAKE COLONY HOMEOWNERS ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Jo-Ann built?
Lake Jo-Ann was completed in 1950, making it 76 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 Jo-Ann?
Lake Jo-Ann 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 Lake Jo-Ann?
Lake Jo-Ann has a dam height of 16 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 Jo-Ann last inspected?
Lake Jo-Ann was last inspected on November 24, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.