6 bridges with vertical clearance data on US-421 in Indiana. Lowest: 156.2ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 156.2ft | Us 421 | I-94 Eb/Wb | 01.51 S Us 20 | 1972 | Map |
| 157.2ft | Us 421 | I-90 Eb/Wb | 02.02 N Sr 2 | 1956 | Map |
| 164.7ft | Us 421 Nb | I-74 Eb/Wb | 01.42 N Sr 3 | 2008 | Map |
| 166.3ft | Us 421 Sb | I-74 Eb/Wb | 01.42 N Sr 3 | 2008 | Map |
| 209.0ft | Us 421 | Ohio R, High & Front St | 00.42 S Of Sr 56 | 2014 | Map |
| 230.0ft | Us 421 | Cfe Rr, Bailey Rd, Road | 00.37 S Us 30 | 1972 | Map |