North Fork
Key Takeaway
North Fork is classified as high hazard in Pennsylvania. It was completed in 1932 and is 94 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 | 105 ft (taller than 96.5% in PA) |
| Dam Length | 900 ft |
| Dam Type | Earth |
| Max Storage | 4.3K acre-ft |
| Normal Storage | 3.4K acre-ft |
| Surface Area | 94 acres |
| Drainage Area | 10 sq mi |
| Year Completed | 1932 (94 years old) |
| NID ID | PA00234 |
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
GREATER JOHNSTOWN WATER AUTHORITY
Local Government
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of North Fork?
North Fork 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 North Fork?
North Fork is owned by GREATER JOHNSTOWN WATER AUTHORITY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was North Fork built?
North Fork was completed in 1932, making it 94 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 North Fork?
North Fork 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 North Fork?
North Fork has a dam height of 105 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 North Fork last inspected?
North Fork was last inspected on March 25, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.