Structure LONG-E5TH-FOX · Boulder County, CO
Carries E 5th Avenue over Oligarchy Ditch, 0.1 Mi East Of Fox ST.
A culvert 22 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 | 0.1 Mi East Of Fox ST |
| Carries | E 5th Avenue |
| Crosses | Oligarchy Ditch |
| Coordinates | 40.16700, -105.07791 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 21.7 ft (6.6 m) |
| Deck Width | 57.4 ft (17.5 m) |
| Deck Area | 115.5 sq m |
| Main Spans | 1 |
| Year Built | 1970 |
| Avg Daily Traffic | 1,321 (2023) |
| Truck Traffic | 10% |
| 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 | LONG-E5TH-FOX |
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.