Butterworth Dam
Key Takeaway
Butterworth Dam is classified as significant hazard in Washington. It was completed in 1949 and is 77 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 2.5K acre-ft |
| Normal Storage | 1.2K acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 25 cfs |
| Year Completed | 1949 (77 years old) |
| NID ID | WA00178 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
WA DOC
State Government
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High HazardFrequently Asked Questions
What is the hazard classification of Butterworth Dam?
Butterworth Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Butterworth Dam?
Butterworth Dam is owned by WA DOC (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Butterworth Dam built?
Butterworth Dam was completed in 1949, making it 77 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 Butterworth Dam?
Butterworth Dam serves the following purposes: Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Butterworth Dam last inspected?
Butterworth Dam was last inspected on September 21, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.