10 bridges with vertical clearance data on SR-18 in Oklahoma. Lowest: 164.0ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 164.0ft | S.H. 18 | U.S. 270 Under | 3.5 Mi S Jct Sh 3 | 1961 | Map |
| 164.0ft | S.H. 18 | U.S. 270 Under | 3.5 Mi S Jct Sh 3 | 1961 | Map |
| 172.6ft | S.H. 18 | Cimarron Tp (Us412) Und | 4.4 Mi N Payne Co | 1974 | Map |
| 196.9ft | S.H. 18 | Turner Tp (I-44) Under | 1.2 Mi. N. Sh 66 | 2009 | Map |
| 999.0ft | S.H. 18 | Camp Creek | 1.5 S Jct U.S. 64 | 2018 | Map |
| 999.0ft | S.H. 18 | Dry Creek | 6.9 N Jct S.H. 66 | 2019 | Map |
| 1000.0ft | S.H. 18 | Salt Creek | 2 N Of Pawnee C/L | 2021 | Map |
| 1000.0ft | S.H. 18 | Sycamore Creek | 7.9 E Of S.H. 18 | 2024 | Map |
| 1000.0ft | S.H. 18 | Coal Creek | 7.5N Of Jct Us 64 | 2023 | Map |
| 1000.0ft | S.H. 18 | Black Bear Creek | .4 N U.S. 64 Jct | 2024 | Map |