No 1 Dam
Key Takeaway
No 1 Dam is classified as low hazard in Pennsylvania. It was completed in 1915 and is 111 years old. Its primary use is recreation.
Physical Details
| Dam Height | 26 ft (taller than 58.2% in PA) |
| Dam Length | 900 ft |
| Max Storage | 25 acre-ft |
| Normal Storage | 25 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1915 (111 years old) |
| NID ID | PA00694 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
MARYD COMMUNITY ASSOCIATION
Private
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High Hazard 34 ftFrequently Asked Questions
What is the hazard classification of No 1 Dam?
No 1 Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates No 1 Dam?
No 1 Dam is owned by MARYD COMMUNITY ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was No 1 Dam built?
No 1 Dam was completed in 1915, making it 111 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 No 1 Dam?
No 1 Dam 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 No 1 Dam?
No 1 Dam has a dam height of 26 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 No 1 Dam last inspected?
No 1 Dam was last inspected on June 11, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.