Oregon has 3 navigation dams, of which 3 carry a high hazard classification. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway.
| # | Dam | County | Height (ft) | Hazard | Condition | Year |
|---|---|---|---|---|---|---|
| 1 | John Day Lock and Dam | Klickitat | 230 | High | Not assessed | 1968 |
| 2 | The Dalles Lock and Dam | Klickitat | 200 | High | Not assessed | 1957 |
| 3 | Bonneville Locks and Dam | Multnomah | 197 | High | Not assessed | 1938 |