SR 4004 over Mill Run
Good Condition77 years old8,276 vehicles/day
Location
| State | Pennsylvania |
| County | Blair |
| Location | Altoona 58th Street |
| Carries | SR 4004 |
| Crosses | Mill Run |
| Coordinates | 40.46658, -78.41858 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 69.9 ft (21.3 m) |
| Max Span | 34.1 ft (10.4 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 281.2 sq m |
| Main Spans | 2 |
| Year Built | 1949 (reconstructed 2021) |
Traffic
| Avg Daily Traffic | 8,276 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005806 |