Round Butte
Deschutes River·
Jefferson, Oregon·
Built 1964·
Rockfill·
440 ft tall
Physical Details
| Dam Height | 440 ft (taller than 99.8% in OR) |
| Dam Length | 1,450 ft |
| Dam Type | Rockfill |
| Max Storage | 535.0K acre-ft |
| Normal Storage | 535.0K acre-ft |
| Surface Area | 4,000 acres |
| Drainage Area | 7,514 sq mi |
| Max Discharge | 28,000 cfs |
| Year Completed | 1964 (62 years old) |
| NID ID | OR00549 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: June 8, 2022
State Regulated: No
Ownership
Portland General Electric Company
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Round Butte?
Round Butte is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Round Butte?
Round Butte is owned by Portland General Electric Company (Private).
When was Round Butte last inspected?
Round Butte was last inspected on June 8, 2022.
When was Round Butte built?
Round Butte was completed in 1964, making it 62 years old.
Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.