US 1 Alt over Us1 Nbr Amtrak Herbert
Fair Condition90 years old19,195 vehicles/day
Location
| State | Maryland |
| County | Baltimore |
| Location | 1.40 Mi S Of Is 695 |
| Carries | US 1 Alt |
| Crosses | Us1 Nbr Amtrak Herbert |
| Coordinates | 39.22974, -76.69246 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 540.0 ft (164.6 m) |
| Max Span | 137.1 ft (41.8 m) |
| Deck Width | 59.1 ft (18 m) |
| Deck Area | 2962.8 sq m |
| Main Spans | 5 |
| Year Built | 1936 (reconstructed 1980) |
Traffic
| Avg Daily Traffic | 19,195 (2024) |
| Truck Traffic | 8% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 100000030011010 |