8 bridges with vertical clearance data on US-51 in Illinois. Lowest: 160.1ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 160.1ft | Fap-322 (Us-51) | Fai-70 | Us-51 Vandalia Int | 1964 | Map |
| 164.0ft | Fap 412 Us 51(Nb) | Us 136 | 0.5 Mi W Of Old 51 | 1986 | Map |
| 165.7ft | Fap 322(Us 51) | I-72 | S Edge Forsyth | 2011 | Map |
| 166.7ft | Fap 412 Us 51(Sb) | Us 136 | 0.51 Mi W Of Old 51 | 1986 | Map |
| 168.3ft | Us 51 & Il 75 | I-90 | E. Edge South Beloit | 2000 | Map |
| 200.1ft | Us 51 | Ohio River | 1 Mi S Cairo | 1937 | Map |
| 228.3ft | Fap 322(Sb)(Us 51) | Il-48 & Ns Rr | .5 Mi Sw Of Decatur | 1978 | Map |
| 229.3ft | Fap 322(Nb)(Us 51) | Il-48 & Ns Rr | .5 Mi Sw Of Decatur | 1978 | Map |