5 bridges with vertical clearance data on SR-21 in Kansas. Lowest: 166.7ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 166.7ft | I-635 Nto I-70 W | I-635 Sb Highway | I-635 / I-70 Interchange | 2004 | Map |
| 168.3ft | I70 Wb To I635 Sb | I-635 Nb,& I-70 Highways | I-70 / I-635 Interchange | 1974 | Map |
| 174.9ft | I70 Eb To I635 Nb | I-70 Wb, I-635 Sb, 2 Rps | I-70 / I-635 Interchange | 1975 | Map |
| 179.8ft | I-635 Sb To I-70 E | I-635 Nb Highway | I-635 / I-70 Interchange | 2004 | Map |
| 221.1ft | I-70 Hwy, Wb Ramp | Park Dr, Rr Service Rd | .334 Mi E I-70/I-635 Jct | 2004 | Map |