| Miles Bridge | Baker, OR | 35 miles | NE |
| Coles Bridge | Grant, OR | 36.7 miles | NW |
| Goose Rock Bridge | Grant, OR | 65.1 miles | SW |
| Gwynn Bridge | Malheur, OR | 67 miles | SE |
| Horseshoe Bend Bridge | Malheur, OR | 67.7 miles | SE |
| Rieth Bridge | Umatilla, OR | 68.2 miles | NW |
| Dorothy Bridge | Umatilla, OR | 80.9 miles | NE |
| Joe West Bridge | Umatilla, OR | 81.3 miles | NE |
| Wickersham Bridge | Walla Walla, WA | 90.8 miles | NE |
| Falk Bridge | Payette, ID | 96.1 miles | SE |
| Umatilla Bridge | Umatilla, OR | 96.3 miles | NW |
| Madame Dorion Bridge | Walla Walla, WA | 96.4 miles | NW |
| Taylor Bridge | Gilliam, OR | 101.9 miles | NW |
| Letha Bridge | Gem, ID | 102.1 miles | SE |
| Cow Creek Bridge | Wallowa, OR | 105.4 miles | NE |
| Star Bridge | Ada, ID | 116.4 miles | SE |
| Linder Bridge | Ada, ID | 119.3 miles | SE |
| Eagle Bridge | Ada, ID | 121.7 miles | SE |
| Rice Creek Bridge | Idaho, ID | 124.3 miles | NE |
| Guffey Railroad Bridge | Owyhee, ID | 133.4 miles | SE |
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