Structure 6 0104 · Shasta County, CA
Carries State Route 273 over A.c.i.d. Canal, 02-sha-273-4.52-and.
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 | California |
| County | Shasta |
| Location | 02-sha-273-4.52-and |
| Carries | State Route 273 |
| Crosses | A.c.i.d. Canal |
| Coordinates | 40.43952, -122.29174 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 96.8 ft (29.5 m) |
| Deck Area | 185.8 sq m |
| Main Spans | 2 |
| Year Built | 1948 (reconstructed 1961) |
| Avg Daily Traffic | 9,800 (2020) |
| Truck Traffic | 8% |
| Lanes On Bridge | 5 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 06 0104 |
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.