Graff #1
Key Takeaway
Graff #1 is classified as low hazard in Oklahoma. It was completed in 1968 and is 58 years old.
Physical Details
| Dam Height | 20 ft (taller than 11.5% in OK) |
| Dam Length | 658 ft |
| Dam Type | Earth |
| Max Storage | 65 acre-ft |
| Normal Storage | 0 acre-ft |
| Drainage Area | 0 sq mi |
| Year Completed | 1968 (58 years old) |
| NID ID | OK83828 |
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
GRAFF ESTATE
Private
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Graff #1?
Graff #1 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 Graff #1?
Graff #1 is owned by GRAFF ESTATE (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Graff #1 built?
Graff #1 was completed in 1968, making it 58 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Graff #1?
Graff #1 has a dam height of 20 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.