Robert Johnson
Key Takeaway
Robert Johnson is classified as low hazard in Montana. It was completed in 1937 and is 89 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 17 ft (taller than 34.9% in MT) |
| Dam Length | 350 ft |
| Dam Type | Earth |
| Max Storage | 83 acre-ft |
| Normal Storage | 60 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 300 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | MT02466 |
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
ROBERT R JOHNSON
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of Robert Johnson?
Robert Johnson 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 Robert Johnson?
Robert Johnson is owned by ROBERT R JOHNSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Robert Johnson built?
Robert Johnson was completed in 1937, making it 89 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 Robert Johnson?
Robert Johnson serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Robert Johnson?
Robert Johnson has a dam height of 17 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.