Seward Highway over Twenty Mile River
Good Condition3 years old5,200 vehicles/day
Location
| State | Alaska |
| County | Anchorage |
| Location | Mile Point 79.9 |
| Carries | Seward Highway |
| Crosses | Twenty Mile River |
| Coordinates | 60.84503, -148.98794 |
Condition Ratings
| Overall Condition | Good |
| Deck | 9 (Excellent) |
| Superstructure | 9 (Excellent) |
| Substructure | 9 (Excellent) |
| Channel/Waterway | 9 (Excellent) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 652.6 ft (198.9 m) |
| Max Span | 127.0 ft (38.7 m) |
| Deck Width | 54.1 ft (16.5 m) |
| Deck Area | 3281.8 sq m |
| Main Spans | 5 |
| Year Built | 2023 |
Traffic
| Avg Daily Traffic | 5,200 (2020) |
| Truck Traffic | 14% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0634 |