Structure BOLD-17-0.32-2A · Boulder County, CO
Carries Lookout Road over Whiterock Ditch, 0.32 Mi E Of Spine Street.
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 | 0.32 Mi E Of Spine Street |
| Carries | Lookout Road |
| Crosses | Whiterock Ditch |
| Coordinates | 40.07269, -105.19626 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 78.4 ft (23.9 m) |
| Deck Area | 153.0 sq m |
| Main Spans | 1 |
| Year Built | 1996 |
| Avg Daily Traffic | 10,395 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | January 2025 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | BOLD-17-0.32-2A |
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.