Structure 3300049P0000000 · Fairfax County, VA
Carries Gwmp over Boundry Channel, 1.5 Miles South Of I-95/4.
A culvert 22 ft across with 2 openings. 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, so those are drawn as typical for a culvert.
| State | Virginia |
| County | Fairfax |
| Location | 1.5 Miles South Of I-95/4 |
| Carries | Gwmp |
| Crosses | Boundry Channel |
| Coordinates | 38.76861, -77.05364 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 10.5 ft (3.2 m) |
| Deck Width | 69.2 ft (21.1 m) |
| Deck Area | 139.3 sq m |
| Main Spans | 2 |
| Year Built | 1960 |
| Avg Daily Traffic | 22,400 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 4 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | National Park Service |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 3300049P0000000 |
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.