Dark Hollow
Key Takeaway
Dark Hollow is classified as high hazard in Pennsylvania. It was completed in 1934 and is 92 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 | 44 ft (taller than 80.7% in PA) |
| Dam Length | 240 ft |
| Dam Type | Earth |
| Max Storage | 11 acre-ft |
| Normal Storage | 9 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1934 (92 years old) |
| NID ID | PA00579 |
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
MOUNT UNION MUNICIPAL AUTHORITY
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Dark Hollow?
Dark Hollow 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 Dark Hollow?
Dark Hollow is owned by MOUNT UNION MUNICIPAL AUTHORITY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Dark Hollow built?
Dark Hollow was completed in 1934, making it 92 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 Dark Hollow?
Dark Hollow 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 Dark Hollow?
Dark Hollow has a dam height of 44 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 Dark Hollow last inspected?
Dark Hollow was last inspected on November 25, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.