Structure 6546 · Fairfax County, VA
Carries Shirley Mem. Hwy. over Back Lick Run, 00.05fr495/01.06to648.
A culvert 21 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 | 00.05fr495/01.06to648 |
| Carries | Shirley Mem. Hwy. |
| Crosses | Back Lick Run |
| Coordinates | 38.79091, -77.17484 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 132.5 sq m |
| Main Spans | 2 |
| Year Built | 1961 |
| Avg Daily Traffic | 204,783 (2022) |
| Truck Traffic | 1% |
| Lanes On Bridge | 10 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 23 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 000000000006546 |
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.