Structure 156691 · Franklin County, IA
Carries 30th ST over Drainage Ditch No 5, 90213501.
A culvert 20 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 | Franklin |
| Location | 90213501 |
| Carries | 30th ST |
| Crosses | Drainage Ditch No 5 |
| Coordinates | 42.57178, -93.28546 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 7.9 ft (2.4 m) |
| Deck Area | 48.2 sq m |
| Main Spans | 2 |
| Year Built | 2014 |
| Avg Daily Traffic | 20 (2022) |
| Lanes On Bridge | 2 |
| Last Inspection | June 2022 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000156691 |
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.