Flat Rock
Key Takeaway
Flat Rock is classified as low hazard in Pennsylvania. It was completed in 1977 and is 49 years old. Its primary use is recreation.
Physical Details
| Dam Height | 21 ft (taller than 46.9% in PA) |
| Dam Length | 510 ft |
| Dam Type | Concrete |
| Max Storage | 1.5K acre-ft |
| Normal Storage | 788 acre-ft |
| Surface Area | 105 acres |
| Drainage Area | 1,809 sq mi |
| Year Completed | 1977 (49 years old) |
| NID ID | PA00896 |
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
DEP
State Government
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Significant Hazard 32 ftFrequently Asked Questions
What is the hazard classification of Flat Rock?
Flat Rock 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 Flat Rock?
Flat Rock is owned by DEP (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Flat Rock built?
Flat Rock was completed in 1977, making it 49 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 Flat Rock?
Flat Rock 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 Flat Rock?
Flat Rock has a dam height of 21 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 Flat Rock last inspected?
Flat Rock was last inspected on November 9, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.