Md 478 over Br Of Potomac River
Fair Condition100 years old2,471 vehicles/day
Location
| State | Maryland |
| County | Frederick |
| Location | 0.23 Mile East Of Md 180 |
| Carries | Md 478 |
| Crosses | Br Of Potomac River |
| Coordinates | 39.32508, -77.66235 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 25.9 ft (7.9 m) |
| Max Span | 24.0 ft (7.3 m) |
| Deck Width | 25.9 ft (7.9 m) |
| Deck Area | 62.4 sq m |
| Main Spans | 1 |
| Year Built | 1926 |
Traffic
| Avg Daily Traffic | 2,471 (2009) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 100000100088010 |