Structure N-18-AF · Huerfano County, CO
Carries SH 10 Ml over Draw, 7.1 Mi E Of Walsenburg.
A culvert 21 ft across with 4 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 | Colorado |
| County | Huerfano |
| Location | 7.1 Mi E Of Walsenburg |
| Carries | SH 10 Ml |
| Crosses | Draw |
| Coordinates | 37.68204, -104.65072 |
| Material | Steel |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 4.6 ft (1.4 m) |
| Deck Width | 84.0 ft (25.6 m) |
| Deck Area | 163.8 sq m |
| Main Spans | 4 |
| Year Built | 1984 |
| Avg Daily Traffic | 390 (2020) |
| Truck Traffic | 21% |
| Lanes On Bridge | 2 |
| Last Inspection | February 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 | N-18-AF |
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.