8 bridges with vertical clearance data on 645 in Virginia. Lowest: 169.9ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 169.9ft | Owens Road | I-95 | 0.20 Mi Fr Route 301 | 1979 | Map |
| 171.6ft | River Road | Interstate-295 | 3.05 Fr 144 & .3 Wcl Hpwl | 1991 | Map |
| 223.1ft | Yellow Hammer Road | N&W Railroad | 0.05 Mi.Fr.Int.Rte. 460 | 1984 | Map |
| 230.3ft | Burke Lake Road | Southern Railway. | 00.10Fr652/00.55To5101 | 1987 | Map |
| 989.8ft | Stringfellow Road | Big Rocky Run | 00.30Fr4978 00.20To4820 | 2013 | Map |
| 3277.6ft | Tapps Ford Road | Rappahannock River | Rapp. & Fauq. Co. Line | 1920 | Map |
| 3277.6ft | Hatcherschaplrd645 | Archies Creek | 1.20-Rt 650; 0.80-Rt 666 | 1978 | Map |
| 3277.6ft | Clifton Road | Wolf Run | 00.45Fr5529/00.65To646 | 2006 | Map |