Structure D-16-CF · Boulder County, CO
Carries SH 119 Ml Sbnd over Beasley Ditch, @ 55th ST NE Of Boulder.
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 | Colorado |
| County | Boulder |
| Location | @ 55th ST NE Of Boulder |
| Carries | SH 119 Ml Sbnd |
| Crosses | Beasley Ditch |
| Coordinates | 40.05831, -105.22529 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 100.4 ft (30.6 m) |
| Deck Area | 192.8 sq m |
| Main Spans | 1 |
| Year Built | 1971 |
| Avg Daily Traffic | 22,000 (2020) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Last Inspection | March 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 | D-16-CF |
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.