Structure N35780B0554 · Navajo County, AZ
Carries IRR BIA RTE 8066 over Dry Run, 7.9km East Of Route N4.
A culvert 21 ft across. 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 | Arizona |
| County | Navajo |
| Location | 7.9km East Of Route N4 |
| Carries | IRR BIA RTE 8066 |
| Crosses | Dry Run |
| Coordinates | 36.25092, -110.17428 |
| Material | Steel |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 101.0 ft (30.8 m) |
| Deck Area | 194.0 sq m |
| Main Spans | 1 |
| Year Built | 2011 (reconstructed 9999) |
| Avg Daily Traffic | 230 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 0000N35780B0554 |
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.