Hemlock Lake
Key Takeaway
Hemlock Lake 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 | 33 ft (taller than 69.3% in PA) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 146 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1950 (76 years old) |
| NID ID | PA00571 |
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
HEMLOCK LAKE P.O.A.
Private
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High Hazard 38 ftFrequently Asked Questions
What is the hazard classification of Hemlock Lake?
Hemlock Lake 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 Hemlock Lake?
Hemlock Lake is owned by HEMLOCK LAKE P.O.A. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hemlock Lake built?
Hemlock Lake 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 Hemlock Lake?
Hemlock Lake 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 Hemlock Lake?
Hemlock Lake has a dam height of 33 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 Hemlock Lake last inspected?
Hemlock Lake was last inspected on January 14, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.