11 bridges with vertical clearance data on 643 in Virginia. Lowest: 159.8ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 159.8ft | Yellow Sulp Rd/643 | Rte 460 By Pass | 0.05-Ncl Chri; 3.65-Rt642 | 1969 | Map |
| 164.0ft | Meetze Road | 15/29 Bypass Nbl & Sbl | .25 Fr 672 & .40 To15 Bus | 1988 | Map |
| 164.0ft | Bk Hampden-Sydney | Rte 15 Bp & 460 Bp | 0.54-Rt 642 / 0.11-Rt 644 | 1976 | Map |
| 164.7ft | Daugherty Rd/Rt643 | Rte 81 | 0.30-Rt11; 0.01-Rt828 | 1962 | Map |
| 172.2ft | Sycolin Road | Dulles Greenway-Rte.267 | 01.25Fr648/00.35To659 | 1995 | Map |
| 191.6ft | Sycolin Road | Rte.7 & 15 Bypass | .80Fr Tolbert .55To 7 | 2014 | Map |
| 212.3ft | Sycolin Road | Rte. 267-Dulles Greenway | 00.03Fr648/00.70To653 | 1994 | Map |
| 219.8ft | Brushfork Road | Ns Railway | .01M To 102 & .25M To 717 | 1961 | Map |
| 233.9ft | Cougartrail Rd/643 | Ns Railway | 0.50-Rte807; 0.20-Rte683 | 1975 | Map |
| 269.7ft | Bellevue Rd 643 | Norfolk Southern Rr | 2.35 Rt 705; 0.25 Rt 762 | 1932 | Map |
| 989.8ft | Sycolin Rd. | Trib. Of Tuscarora Ck. | 0.46 Fr Bfpwy 0.70 To 7 | 2014 | Map |