Thorne Bay Road over Rio Roberts
Fair Condition51 years old190 vehicles/day
Location
| State | Alaska |
| County | Prince of Wales-Hyder |
| Location | Mile Point 5.1 |
| Carries | Thorne Bay Road |
| Crosses | Rio Roberts |
| Coordinates | 55.69389, -132.77583 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 126.0 ft (38.4 m) |
| Max Span | 101.0 ft (30.8 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 284.2 sq m |
| Main Spans | 3 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 190 (2020) |
| Truck Traffic | 26% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 1456 |