Structure 3800001P0000000 · Fairfax County, VA
Carries Trap Road over Service Underpass, 1 Mile South Of Route 7.
Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.
How ratings work20 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a rigid-frame bridge.
| State | Virginia |
| County | Fairfax |
| Location | 1 Mile South Of Route 7 |
| Carries | Trap Road |
| Crosses | Service Underpass |
| Coordinates | 38.93894, -77.26736 |
| Material | Concrete |
| Design | Frame |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 182.1 ft (55.5 m) |
| Deck Area | 338.6 sq m |
| Main Spans | 1 |
| Year Built | 1966 |
| Avg Daily Traffic | 240 (2022) |
| Lanes On Bridge | 5 |
| Lanes Under Bridge | 2 |
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | National Park Service |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 3800001P0000000 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.