Tesoro Water Storage Reservoir
Key Takeaway
Tesoro Water Storage Reservoir is classified as high hazard in Washington. It was completed in 1958 and is 68 years old. Its primary use is water supply. 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 | 1,455 ft |
| Dam Type | Earth |
| Max Storage | 47 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 163 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | WA01968 |
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
Tesoro Refining and Marketing Co.
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Tesoro Water Storage Reservoir?
Tesoro Water Storage Reservoir 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 Tesoro Water Storage Reservoir?
Tesoro Water Storage Reservoir is owned by Tesoro Refining and Marketing Co. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tesoro Water Storage Reservoir built?
Tesoro Water Storage Reservoir was completed in 1958, making it 68 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 Tesoro Water Storage Reservoir?
Tesoro Water Storage Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Tesoro Water Storage Reservoir last inspected?
Tesoro Water Storage Reservoir was last inspected on August 2, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.