Structure B 12 · Washoe County, NV
Carries I 80 over North Truckee Drain, Sparks.
A culvert 25 ft across with 3 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 | Nevada |
| County | Washoe |
| Location | Sparks |
| Carries | I 80 |
| Crosses | North Truckee Drain |
| Coordinates | 39.52758, -119.70982 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 7.9 ft (2.4 m) |
| Deck Area | 250.0 sq m |
| Main Spans | 3 |
| Year Built | 1953 (reconstructed 1989) |
| Avg Daily Traffic | 49,000 (2021) |
| Truck Traffic | 19% |
| Lanes On Bridge | 8 |
| Last Inspection | May 2024 |
| 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 | B 12 |
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.