Structure ARA 30-20.5 · Arapahoe County, CO
Carries County Road 30 over Senac Creek, 2.5 Miles E Of SH 30.
A culvert 20 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 | Arapahoe |
| Location | 2.5 Miles E Of SH 30 |
| Carries | County Road 30 |
| Crosses | Senac Creek |
| Coordinates | 39.63831, -104.67149 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 54.5 ft (16.6 m) |
| Deck Area | 101.3 sq m |
| Main Spans | 1 |
| Year Built | 1958 |
| Avg Daily Traffic | 3,573 (2021) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | ARA 30-20.5 |
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.