7 bridges with vertical clearance data on SR-171 in Illinois. Lowest: 143.4ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 143.4ft | Il 171 (1St Ave) | I-290 Ike - Il 110 Ckc | 1.5 M W Il 43 | 1951 | Map |
| 149.9ft | Il 171 Sb First Av | S&S Canal | 0.2 M Se I-55 | 1963 | Map |
| 159.1ft | Il 171 Sb | 47Th St | 1.3 M N I-55 | 1968 | Map |
| 162.4ft | Il 171 Nb | 47Th St | 1.3 M N I-55 | 1968 | Map |
| 163.4ft | Il 171 | I-355 | 0.62 M S Of 139Th St | 2007 | Map |
| 213.3ft | Il 171 Nb | Joliet Rd&Bn Rr Spur | 0.8 M Nw I-55 | 1964 | Map |
| 214.9ft | Il 171 Sb | Joliet Rd&Bn Rr Spur | 0.5 M Nw I-55 | 1964 | Map |