P M Johnston Dam Number Two
Key Takeaway
P M Johnston Dam Number Two is classified as low hazard in Alabama. It was completed in 1977 and is 49 years old. Its primary use is recreation.
Physical Details
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 130 acre-ft |
| Normal Storage | 120 acre-ft |
| Max Discharge | 750 cfs |
| Year Completed | 1977 (49 years old) |
| NID ID | AL01493 |
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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What is the hazard classification of P M Johnston Dam Number Two?
P M Johnston Dam Number Two 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 Two?
P M Johnston Dam Number Two 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 Two built?
P M Johnston Dam Number Two 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 P M Johnston Dam Number Two?
P M Johnston Dam Number Two serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.