P M Johnston Dam Number One
Key Takeaway
P M Johnston Dam Number One is classified as low hazard in Alabama. It was completed in 1975 and is 51 years old. Its primary use is recreation.
Physical Details
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 1.0K acre-ft |
| Max Discharge | 1,500 cfs |
| Year Completed | 1975 (51 years old) |
| NID ID | AL01494 |
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
P M JOHNSTON
Private
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Low Hazard 6 ftFrequently Asked Questions
What is the hazard classification of P M Johnston Dam Number One?
P M Johnston Dam Number One 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 P M Johnston Dam Number One?
P M Johnston Dam Number One is owned by P M JOHNSTON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was P M Johnston Dam Number One built?
P M Johnston Dam Number One was completed in 1975, making it 51 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 P M Johnston Dam Number One?
P M Johnston Dam Number One serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.