Thompson Valley Diversion (Slid)
Key Takeaway
Thompson Valley Diversion (Slid) is classified as significant hazard in Oregon. It was completed in 1915 and is 111 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 48 ft (taller than 83.4% in OR) |
| Dam Length | 244 ft |
| Dam Type | Earth |
| Max Storage | 460 acre-ft |
| Normal Storage | 460 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 180 sq mi |
| Max Discharge | 5,000 cfs |
| Year Completed | 1915 (111 years old) |
| NID ID | OR00126 |
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
JOHN MONFORE WEYERHAESER COMPANY
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Thompson Valley Diversion (Slid)?
Thompson Valley Diversion (Slid) 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 Thompson Valley Diversion (Slid)?
Thompson Valley Diversion (Slid) is owned by JOHN MONFORE WEYERHAESER COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thompson Valley Diversion (Slid) built?
Thompson Valley Diversion (Slid) was completed in 1915, making it 111 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 Thompson Valley Diversion (Slid)?
Thompson Valley Diversion (Slid) serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Thompson Valley Diversion (Slid)?
Thompson Valley Diversion (Slid) has a dam height of 48 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 Thompson Valley Diversion (Slid) last inspected?
Thompson Valley Diversion (Slid) was last inspected on August 1, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.