Structure B-15-AC · Larimer County, CO
Carries SH 14 Ml over Boyd Gulch, 6.7 Mi W Of Jct US 287.
A culvert 22 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 | Colorado |
| County | Larimer |
| Location | 6.7 Mi W Of Jct US 287 |
| Carries | SH 14 Ml |
| Crosses | Boyd Gulch |
| Coordinates | 40.69294, -105.26534 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 48.9 ft (14.9 m) |
| Deck Area | 98.3 sq m |
| Main Spans | 2 |
| Year Built | 2018 |
| Avg Daily Traffic | 3,000 (2018) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
| Last Inspection | September 2023 |
| 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-15-AC |
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.