13 bridges with vertical clearance data on SR-18 in Oregon. Lowest: 148.3ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 148.3ft | Or 18 (Hwy 39) | Or 221 (Hwy 150) | 008 Mi Sw Hwy 1W Jct | 1957 | Map |
| 154.2ft | Or 18 (Hwy 39) | Hwy 157 Eb | 040 Mi E Polk Yam Co Ln | 1959 | Map |
| 154.2ft | Or 18 (Hwy 39) | Casino Entrance Road | At Grande Ronde Casino | 1996 | Map |
| 164.0ft | Or 18 (Hwy 39) Con | Hwy 39 Wb | 142 Mi E Of Polk Yamhill | 1964 | Map |
| 170.9ft | Or 18 (Hwy 39) | Us 101 (Hwy 9) | 001 Mi E Hwy 101 | 1962 | Map |
| 176.8ft | Hwy 483 Conn. | Hwy 39 | At Mcminnville Spur | 1964 | Map |
| 179.1ft | Se Parks Dr | Hwy 39 | Mp 56.19 | 2016 | Map |
| 185.0ft | Or 18 (Hwy 39) | Hwy 30 | 025 Mi W Polk Yam Co Ln | 1958 | Map |
| 186.7ft | Or 18 (Hwy 39) | S. Yamhill R. & Hwy 157 | 026 Mi W Polk Yam Co Ln | 1958 | Map |
| 188.6ft | Hwy 039 (Or 18) | Private Road | Mp 57.10 | 2016 | Map |
| 229.3ft | Hwy 039 (Or 18) | Rr, College/River St | Mp 58.48 | 2016 | Map |
| 234.9ft | Or 18 (Hwy 39) | Wprr | 150 Mi E Polk Yam Co Ln | 1964 | Map |
| 235.9ft | Or 18 (Hwy 39) | Hwy 1W And Pnwr | Mp 55.81 | 2016 | Map |