Structure F-20-BO · Adams County, CO
Carries US 36 Ml over Draw, 12 Mi E Of Byers.
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 | Colorado |
| County | Adams |
| Location | 12 Mi E Of Byers |
| Carries | US 36 Ml |
| Crosses | Draw |
| Coordinates | 39.74005, -104.01303 |
| Material | Steel |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 84.0 ft (25.6 m) |
| Deck Area | 179.2 sq m |
| Main Spans | 2 |
| Year Built | 1987 |
| Avg Daily Traffic | 790 (2020) |
| Truck Traffic | 42% |
| Lanes On Bridge | 2 |
| Last Inspection | March 2025 |
| 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 | F-20-BO |
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.