Structure 6633 · Sierra County, NM
Carries I-25 Sbl/nbl over Unnamed Waterway, 6.6 Mi N Of Dona Ana Cl.
A culvert 23 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 | Sierra |
| Location | 6.6 Mi N Of Dona Ana Cl |
| Carries | I-25 Sbl/nbl |
| Crosses | Unnamed Waterway |
| Coordinates | 32.86640, -107.29050 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 7.9 ft (2.4 m) |
| Deck Area | 174.3 sq m |
| Main Spans | 2 |
| Year Built | 1965 |
| Avg Daily Traffic | 7,331 (2023) |
| Truck Traffic | 45% |
| Lanes On Bridge | 4 |
| Last Inspection | March 2024 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000006633 |
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.