21 bridges with vertical clearance data on SR-21 in Missouri. Lowest: 145.0ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 145.0ft | Mo 21 S | Crd Lonedell Rd | S 22 T 43 N R 5 E | 1987 | Map |
| 148.3ft | Mo 21 N | Crd Lonedell Rd | S 22 T 43 N R 5 E | 1987 | Map |
| 160.8ft | Mo 21 S | Is 270 | S 1998 T 44 N R 6 E | 1967 | Map |
| 162.1ft | Mo 21 S | Crd Heads Crk Rd | S 19 T 42 N R 5 E | 1990 | Map |
| 162.4ft | Mo 21 S | Or 21 | S 22 T 43 N R 5 E | 1978 | Map |
| 165.0ft | Mo 21 N | Crd Heads Crk Rd | S 19 T 42 N R 5 E | 1990 | Map |
| 165.0ft | Mo 21 S | Crd Old Hwy 21 | S 1974 T 43 N R 5 E | 1987 | Map |
| 165.0ft | Mo 21 N | Rt M | S 18 T 42 N R 5 E | 1997 | Map |
| 171.6ft | Mo 21 N | Crd Old Hwy 21 | S 5 T 42 N R 5 E | 1987 | Map |
| 177.5ft | Mo 21 S | Crd Old Hwy 21 | S 32 T 43 N R 5 E | 1987 | Map |
| 183.4ft | Mo 21 S | Meramec Rvr, Crd Meramec | S 13 T 43 N R 4 E | 1940 | Map |
| 185.0ft | Mo 21 S | Rt M | S 18 T 42 N R 5 E | 1997 | Map |
| 199.1ft | Mo 21 S | Crd Hayden Rd | S 23 T 41 N R 4 E | 2007 | Map |
| 207.3ft | Mo 21 N | Crd Old Hwy 21 | S 197 T 43 N R 5 E | 1987 | Map |
| 226.7ft | Mo 21 S | Pedestrain Trail | S 2995 T 44 N R 6 E | 1969 | Map |
| 260.8ft | Mo 21 N | Crd Hayden Rd | S 23 T 41 N R 4 E | 2007 | Map |
| 270.0ft | Mo 21 S | Rt Bb | S 33 T 41 N R 4 E | 2003 | Map |
| 280.2ft | Mo 21 N | Rt Bb | S 33 T 41 N R 4 E | 2003 | Map |
| 325.8ft | Mo 21 S | Up Rr | S 36 T 38 N R 2 E | 1993 | Map |
| 640.1ft | Mo 21 S | Crd Klable Rd | S 31 T 42 N R 6 E | 2000 | Map |
| 649.9ft | Mo 21 N | Crd Klable Rd | S 31 T 42 N R 5 E | 2000 | Map |