19 bridges with vertical clearance data on SR-21 in Texas. Lowest: 148.0ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 148.0ft | Sh 21/Sh 71 Wbfr | Colorado River/Waters St | 0.65 Mi W Of Sh 95 | 2021 | Map |
| 148.0ft | Sh 21/Sh 71 Wbramp | Colorado Riv & Waters St | 0.65 Mi W Of Sh 95 | 2021 | Map |
| 152.6ft | Sh 21 | Us 77 | 2.4 Mi N Of Fm 1624 | 1964 | Map |
| 162.1ft | Sh 21/ Sh 71 Ebfr | Colorado River/Waters St | 0.65 Mi W Of Sh 95 | 2021 | Map |
| 163.4ft | Sh 21 | Fm 2818 | 1.23 Mi W Of Fm 158 | 1975 | Map |
| 165.7ft | Sh 21 | Us 290 | 2.1 Mi W Of Fm 2104 | 1969 | Map |
| 171.6ft | Sh 21 | Fm 812 | 0.9 Mi E Of Caldwell C/L | 2001 | Map |
| 179.1ft | Sh 21/71 Wb | Hasler Blvd | 2.4 Mi E Of Fm 20 | 2005 | Map |
| 180.1ft | Sh 21/71 Eb | Hasler Blvd | 2.4 Mi E Of Fm 20 | 2005 | Map |
| 190.3ft | Sh 21/71 Wb | Loop 150 West | 2.8 Mi E Of Fm 20 | 2005 | Map |
| 190.3ft | Sh 21/71 Eb | Loop 150 West | 2.8 Mi E Of Fm 20 | 2005 | Map |
| 192.6ft | Sh 21/71 Eb | Sh 304 | 0.8 Mi E Of Fm 969 | 2007 | Map |
| 192.6ft | Sh 21/71 Wb | Sh 304 | 0.8 Mi E Of Fm 969 | 2007 | Map |
| 210.0ft | Sh 21; Sh 71 Ebfr | Uprr; Mlk; Gills Br | 0.3 Mi W Of Sh 21/Sh 95 | 2021 | Map |
| 214.9ft | Sh 21; Sh 71 Ebml | Uprr; College St; Mlk Dr | 0.32 Mi W Of Hwy 95 | 2023 | Map |
| 225.1ft | Sh 21 Wb | Up Rr | 1.8 Mi Sw Of Brazos River | 1979 | Map |
| 229.3ft | Sh 21 Eb | Up Rr | 1.8 Mi Sw Of Brazos River | 1988 | Map |
| 230.0ft | Sh 21; Sh 71 Eb Rp | Uprr; Mlk; Gills Br | 0.3 Mi W Of Sh 21/Sh 95 | 2021 | Map |
| 234.9ft | Sh 21 | Rr & Ayish Byu & City St | 0.60 Mi E Of Us 96 | 1984 | Map |