Structure 23170 · Delaware County, IA
Carries Ia 3 over Pine Creek, 6.9 Mi.e Of Jct. Ia 38.
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 | Iowa |
| County | Delaware |
| Location | 6.9 Mi.e Of Jct. Ia 38 |
| Carries | Ia 3 |
| Crosses | Pine Creek |
| Coordinates | 42.63853, -91.22626 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 58.2 sq m |
| Main Spans | 2 |
| Year Built | 1932 (reconstructed 1985) |
| Avg Daily Traffic | 760 (2022) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
| Last Inspection | April 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000023170 |
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.