Johnson
Key Takeaway
Johnson is classified as low hazard in Wyoming. It was completed in 1962 and is 64 years old. Its primary use is other.
Physical Details
| Dam Height | 35 ft (taller than 78.8% in WY) |
| Dam Length | 580 ft |
| Dam Type | Earth |
| Max Storage | 132 acre-ft |
| Normal Storage | 95 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 736 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | WY00143 |
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
WYOMING GAME AND FISH COMMISSION
State Government
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Low Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Johnson?
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 Johnson?
Johnson is owned by WYOMING GAME AND FISH COMMISSION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson built?
Johnson was completed in 1962, making it 64 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 Johnson?
Johnson serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnson?
Johnson has a dam height of 35 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 Johnson last inspected?
Johnson was last inspected on May 13, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.