T-406 Mill Road over Blair Gap Run
Fair Condition68 years old684 vehicles/day
Location
| State | Pennsylvania |
| County | Blair |
| Location | 1 Mi.w.of Duncansville |
| Carries | T-406 Mill Road |
| Crosses | Blair Gap Run |
| Coordinates | 40.41602, -78.45232 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 44.0 ft (13.4 m) |
| Max Span | 43.0 ft (13.1 m) |
| Deck Width | 21.7 ft (6.6 m) |
| Deck Area | 88.4 sq m |
| Main Spans | 1 |
| Year Built | 1958 (reconstructed 2014) |
Traffic
| Avg Daily Traffic | 684 (2024) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005889 |