Greenwood Lake
Key Takeaway
Greenwood Lake is classified as high hazard in Pennsylvania. It was completed in 1880 and is 146 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 | 32 ft (taller than 67.5% in PA) |
| Dam Length | 850 ft |
| Dam Type | Earth |
| Max Storage | 2.2K acre-ft |
| Normal Storage | 1.1K acre-ft |
| Surface Area | 110 acres |
| Drainage Area | 6 sq mi |
| Year Completed | 1880 (146 years old) |
| NID ID | PA00701 |
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
DUAL VALLEY RECREATION ASSOCIATION
Private
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What is the hazard classification of Greenwood Lake?
Greenwood 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 Greenwood Lake?
Greenwood Lake is owned by DUAL VALLEY RECREATION ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Greenwood Lake built?
Greenwood Lake 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 Greenwood Lake?
Greenwood 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 Greenwood Lake?
Greenwood Lake has a dam height of 32 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 Greenwood Lake last inspected?
Greenwood Lake was last inspected on October 15, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.