22 bridges with vertical clearance data on SR-71 in Alaska. Lowest: 179.1ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 179.1ft | Richardson Highway | Gulkana River | Mile Point 129.8 | 1974 | Map |
| 179.1ft | Richardson Highway | Sourdough Creek | Mile Point 150.5 | 1987 | Map |
| 179.1ft | Richardson Highway | Haggard Creek | Mile Point 163.7 | 2021 | Map |
| 179.1ft | Richardson Highway | One Mile Creek | Mile Point 187.5 | 2000 | Map |
| 179.1ft | Richardson Highway | Gunn Creek | Mile Point 199.5 | 1954 | Map |
| 179.1ft | Richardson Highway | Phelan Creek | Mile Point 204.3 | 2014 | Map |
| 179.1ft | Richardson Highway | Mccallum Creek | Mile Point 205.2 | 1954 | Map |
| 179.1ft | Richardson Highway | Upper Miller Creek | Mile Point 217.9 | 1958 | Map |
| 179.1ft | Richardson Highway | Lower Miller Creek | Mile Point 219.5 | 1958 | Map |
| 179.1ft | Richardson Highway | Castner Creek | Mile Point 219.9 | 1958 | Map |
| 179.1ft | Richardson Highway | Trims Creek | Mile Point 221.6 | 1954 | Map |
| 179.1ft | Richardson Highway | Michael Creek | Mile Point 223.6 | 1954 | Map |
| 179.1ft | Richardson Highway | Flood Creek | Mile Point 223.9 | 1954 | Map |
| 179.1ft | Richardson Highway | Whistler Creek | Mile Point 225.8 | 1954 | Map |
| 179.1ft | Richardson Highway | Boulder Creek | Mile Point 226.5 | 1954 | Map |
| 179.1ft | Richardson Highway | Lower Suzy Q Creek | Mile Point 227.3 | 1990 | Map |
| 179.1ft | Richardson Highway | Gunny Sack Creek | Mile Point 229.7 | 1954 | Map |
| 179.1ft | Richardson Highway | Onemile Creek | Mile Point 231.1 | 2012 | Map |
| 179.1ft | Richardson Highway | Darling Creek | Mile Point 233.8 | 1952 | Map |
| 179.1ft | Richardson Highway | Bear Creek | Mile Point 236.1 | 2024 | Map |
| 179.1ft | Richardson Highway | Ruby Creek | Mile Point 237.5 | 2017 | Map |
| 179.1ft | Richardson Highway | Jarvis Creek | Mile Point 267.6 | 2015 | Map |