Barrier Dam
Key Takeaway
Barrier Dam is classified as low hazard in Washington. It was completed in 1968 and is 58 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 12 ft (taller than 9.8% in WA) |
| Dam Length | 718 ft |
| Dam Type | Concrete |
| Max Storage | 600 acre-ft |
| Normal Storage | 455 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1,402 sq mi |
| Max Discharge | 68,350 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | WA00555 |
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
City of Tacoma
Public Utility
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High Hazard 366 ftFrequently Asked Questions
What is the hazard classification of Barrier Dam?
Barrier Dam 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 Barrier Dam?
Barrier Dam is owned by City of Tacoma (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Barrier Dam built?
Barrier Dam was completed in 1968, making it 58 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 Barrier Dam?
Barrier Dam serves the following purposes: Hydroelectric, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Barrier Dam?
Barrier Dam has a dam height of 12 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 Barrier Dam last inspected?
Barrier Dam was last inspected on June 29, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.