Md 478 over Br Of Potomac River
Good Condition7 years old2,471 vehicles/day
Location
| State | Maryland |
| County | Frederick |
| Location | 1.78 Mi S. East Of Md 180 |
| Carries | Md 478 |
| Crosses | Br Of Potomac River |
| Coordinates | 39.31512, -77.63690 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 9 (Excellent) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 58.4 ft (17.8 m) |
| Max Span | 55.1 ft (16.8 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 227.8 sq m |
| Main Spans | 1 |
| Year Built | 2019 |
Traffic
| Avg Daily Traffic | 2,471 (2009) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 100000100089010 |