Hiram M. Chittenden Locks and Dam
Key Takeaway
Hiram M. Chittenden Locks and Dam is classified as high hazard in Washington. It was completed in 1916 and is 110 years old. Its primary use is navigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Length | 240 ft |
| Dam Type | Gravity |
| Max Storage | 458.0K acre-ft |
| Normal Storage | 458.0K acre-ft |
| Surface Area | 25,000 acres |
| Drainage Area | 607 sq mi |
| Max Discharge | 16,000 cfs |
| Year Completed | 1916 (110 years old) |
| NID ID | WA00301 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
USACE - Seattle District
Federal Government
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High HazardFrequently Asked Questions
What is the hazard classification of Hiram M. Chittenden Locks and Dam?
Hiram M. Chittenden Locks and Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hiram M. Chittenden Locks and Dam?
Hiram M. Chittenden Locks and Dam is owned by USACE - Seattle District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hiram M. Chittenden Locks and Dam built?
Hiram M. Chittenden Locks and Dam was completed in 1916, making it 110 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 Hiram M. Chittenden Locks and Dam?
Hiram M. Chittenden Locks and Dam serves the following purposes: Navigation, Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Hiram M. Chittenden Locks and Dam last inspected?
Hiram M. Chittenden Locks and Dam was last inspected on March 10, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.