Structure D-31-PB-630 · Denver County, CO
Carries NB Pena Boulevard over Third Creek | 75th Avenu, 3.5 Mi East Of E-470.
A culvert 21 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 | Denver |
| Location | 3.5 Mi East Of E-470 |
| Carries | NB Pena Boulevard |
| Crosses | Third Creek | 75th Avenu |
| Coordinates | 39.83327, -104.68130 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 174.2 ft (53.1 m) |
| Deck Area | 339.8 sq m |
| Main Spans | 2 |
| Year Built | 1992 |
| Avg Daily Traffic | 55,210 (2021) |
| Truck Traffic | 6% |
| Lanes On Bridge | 3 |
| Last Inspection | January 2025 |
| Inspection Frequency | Every 24 months |
| Owner | Other Local Agencies |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | D-31-PB-630 |
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.