Structure 8703 · McKinley County, NM
Carries Nm-264 over Black Ridge Wash, 0.2 Mi W Of Us-491.
A culvert 24 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 | New Mexico |
| County | McKinley |
| Location | 0.2 Mi W Of Us-491 |
| Carries | Nm-264 |
| Crosses | Black Ridge Wash |
| Coordinates | 35.62889, -108.78366 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.6 ft (7.2 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 190.8 sq m |
| Main Spans | 2 |
| Year Built | 1986 |
| Avg Daily Traffic | 11,051 (2023) |
| Truck Traffic | 17% |
| Lanes On Bridge | 4 |
| Last Inspection | January 2025 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000008703 |
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.