7 bridges with vertical clearance data on 21 in Alabama. Lowest: 160.1ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 160.1ft | Co21-Perryman Rd | I-20 | 1.1 Mi E Jct Sr 9 | 1970 | Map |
| 170.9ft | Cr-21 | I-59 (Mp 24.8) | 1.3 Mi.N. Of Co.Rd 20 | 1974 | Map |
| 248.0ft | Co. Hwy.21 | Hurricane Creek | Sec-35 T-5-N R-25-E | 1961 | Map |
| 248.0ft | County Hwy 21 | Bear Creek | Sec 25 T6N R25E | 1998 | Map |
| 399.9ft | Knight Road | Oaktasasi Creek | 2.7 Mi North Of Al Hwy 22 | 2000 | Map |
| 990.2ft | County Road 21 | Gabriel Creek | 2.1 Mi. W. Of Guinea | 1999 | Map |
| 990.2ft | County Road 21 | Trib. To Five Mile Cr | 0.1 Mile South Of S.R. 60 | 1997 | Map |