| Madame Dorion Bridge | Walla Walla, WA | 10.8 miles | SE |
| Twin Bridges | Benton, WA | 19.4 miles | NW |
| Luckenbill Bridge | Walla Walla, WA | 20.8 miles | NE |
| Umatilla Bridge | Umatilla, OR | 24 miles | SW |
| Joe West Bridge | Umatilla, OR | 38.5 miles | SE |
| Dorothy Bridge | Umatilla, OR | 39.8 miles | SE |
| Rieth Bridge | Umatilla, OR | 40 miles | SE |
| Wickersham Bridge | Walla Walla, WA | 43 miles | SE |
| Vernita Bridge | Benton, WA | 45.8 miles | NW |
| Lyons Ferry Bridge | Franklin, WA | 46.4 miles | NE |
| Central Ferry Bridge | Whitman, WA | 64.9 miles | NE |
| Taylor Bridge | Gilliam, OR | 74 miles | SW |
| Fisher Bridge | Whitman, WA | 81.8 miles | NE |
| Rocky Ford Bridge | Lincoln, WA | 82.2 miles | NE |
| Matlock Bridge | Whitman, WA | 86.1 miles | NE |
| Cottonwood Bridge | Sherman, OR | 86.2 miles | SW |
| Indian Timothy Bridge | Asotin, WA | 87.1 miles | NE |
| Torrence Bridge | Whitman, WA | 88.6 miles | NE |
| Sam Hill Memorial Bridge | Sherman, OR | 95 miles | SW |
| Clearwater River Memorial Bridge | Nez Perce, ID | 97.2 miles | NE |
| Miles Bridge | Baker, OR | 110 miles | SE |
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