32 bridges with vertical clearance data on SR-18 in Washington. Lowest: 148.3ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 148.3ft | Sr 18 | Green River | 2.5 E Jct Sr 164 | 1959 | Map |
| 149.9ft | Sr 18 | F St Se | 0.2 E Jct Sr 164 | 1958 | Map |
| 153.2ft | Sr 18 | Sr 164 | 1.3 E Jct Sr 167 | 1959 | Map |
| 162.4ft | Sr 18 | W Valley Hwy(Old Sr 181) | 2.3 E Jct I-5 | 1957 | Map |
| 170.9ft | Sr 18 | 244Th Ave Se | 1.2 E Jct Sr 169 | 2005 | Map |
| 171.6ft | Sr 18 | Sr 516 | 7.2 E Jct Sr 164 | 1979 | Map |
| 174.9ft | Sr 18 | Sr 516 | 7.2 E Jct Sr 164 | 1997 | Map |
| 175.9ft | Sr 18 | Se 240Th St | 3.5 E Jct Sr 516 | 2002 | Map |
| 176.5ft | W-W Ramp/3Rd St | C St Sw | 1.0 E Jct Sr 167 | 2002 | Map |
| 177.5ft | Sr 18 | 244Th Ave Se | 1.2 E Jct Sr 169 | 2005 | Map |
| 185.7ft | Sr 18 | Se 240Th St | 3.5 E Jct Sr 516 | 2002 | Map |
| 187.7ft | Sr 18 | Sr 169,Maxwell,Taylor Cr | Jct Sr 169 | 2005 | Map |
| 192.6ft | Sr 18 E-N Ramp | I-5, Sr 18, Ramps | Jct I-5 | 2012 | Map |
| 194.2ft | Sr 18 W-S Ramp | I-5 & Sr 18 | Jct I-5 | 2012 | Map |
| 196.5ft | Sr 18 | 244Th Ave Se | 1.2 E Jct Sr 169 | 2006 | Map |
| 197.5ft | Sr 18 | Kent-Black Diamond Rd Se | 6.2 E Jct Sr 164 | 1959 | Map |
| 231.0ft | Sr 18 | Kent-Black Diamond Rd | 6.2 E Jct Sr 164 | 1996 | Map |
| 237.5ft | Sr 18 | Bnsf Rr Spur | 0.8 E Jct Sr 164 | 1986 | Map |
| 245.7ft | Sr 18 | Bnrr, Auburn-Blk Diamond | 2.3 E Jct Sr 164 | 1995 | Map |
| 248.4ft | Sr 18 | Bnsf Rr Spur | 0.8 E Jct Sr 164 | 1960 | Map |
| 251.6ft | Sr 18 | Bnrr, Auburn-Blk Diamond | 2.3 E Jct Sr 164 | 1959 | Map |
| 252.6ft | Sr 18 | Sr 169,Maxwell,Taylor Cr | Jct Sr 169 | 2004 | Map |
| 265.1ft | Sr 18 | Cmstpp Rr | 0.6 E Jct Sr 167 | 1955 | Map |
| 274.3ft | Sr 18 Ramp | Holder Cr & Hobart Rd | 4.6 E Jct Sr 169 | 1996 | Map |
| 278.2ft | Sr 18 | Up Rr | 0.6 E Jct Sr 167 | 1972 | Map |
| 301.5ft | Sr 18 | Npry & City Streets | 1.0 E Jct Sr 167 | 1956 | Map |
| 305.1ft | Sr 18 | Holder Cr Hobart Rd | 4.6 E Jct Sr 169 | 1996 | Map |
| 320.9ft | Sr 18 | Holder Cr Hobart Rd | 4.6 E Jct Sr 169 | 1961 | Map |
| 322.5ft | Sr 18 | M Street | 0.6 E Jct Sr 164 | 1984 | Map |
| 419.9ft | Sr 18 | Cedar River, Se Bain Rd | 5.2 N Jct Sr 516 | 2005 | Map |
| 506.6ft | Sr 18 | Cedar River, Se Bain Rd | 5.2 N Jct Sr 516 | 2004 | Map |
| 737.5ft | Sr 18 | Peasley Canyon Rd | 1.9 E Jct I-5 | 1958 | Map |