Washington has 5 navigation dams, of which 5 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 | Little Goose Lock and Dam | Columbia | 226 | High | Not assessed | 1970 |
| 2 | Lower Monumental Lock and Dam | Franklin | 226 | High | Not assessed | 1969 |
| 3 | Ice Harbor Lock and Dam | Walla Walla | 208 | High | Not assessed | 1962 |
| 4 | Hiram M. Chittenden Locks and Dam | King | 63 | High | Not assessed | 1916 |
| 5 | Lower Granite Lock and Dam - East Levee | Nez Perce | 27 | High | Not assessed | 1974 |